Ejecutar un script SQL grande (con comandos GO)

Esto es lo que reuní para resolver mi problema inmediato.

private void ExecuteBatchNonQuery(string sql, SqlConnection conn) {
    string sqlBatch = string.Empty;
    SqlCommand cmd = new SqlCommand(string.Empty, conn);
    conn.Open();
    sql += "\nGO";   // make sure last batch is executed.
    try {
        foreach (string line in sql.Split(new string[2] { "\n", "\r" }, StringSplitOptions.RemoveEmptyEntries)) {
            if (line.ToUpperInvariant().Trim() == "GO") {
                cmd.CommandText = sqlBatch;
                cmd.ExecuteNonQuery();
                sqlBatch = string.Empty;
            } else {
                sqlBatch += line + "\n";
            }
        }            
    } finally {
        conn.Close();
    }
}

Requiere que los comandos GO estén en su propia línea, y no detectará comentarios de bloque, por lo que este tipo de cosas se dividirán y causarán un error:

ExecuteBatchNonQuery(@"
    /*
    GO
    */", conn);

Puede usar Objetos de administración SQL para realizar esto. Estos son los mismos objetos que Management Studio utiliza para ejecutar consultas. Creo que Server.ConnectionContext.ExecuteNonQuery() hará lo que necesites.

La palabra clave "GO" batch separator es realmente utilizada por SQL Management Studio, de modo que sabe dónde terminar los lotes que está enviando al servidor, y no se pasa a SQL server. Incluso puede cambiar la palabra clave en Management Studio, si así lo desea.

Basado en la solución de Blorgbeard.

foreach (var sqlBatch in commandText.Split(new[] { "GO" }, StringSplitOptions.RemoveEmptyEntries))
{
   sqlCommand.CommandText = sqlBatch;
   sqlCommand.ExecuteNonQuery();
}

Si no desea instalar objetos SMO, puede usar la herramienta gplex (consulte esta respuesta)

Si no desea usar SMO, por ejemplo porque necesita ser multiplataforma, también puede usar la clase ScriptSplitter desde SubText.

Aquí está la implementación en C # & VB.NET

Uso:

    string strSQL = @"
SELECT * FROM INFORMATION_SCHEMA.columns
GO
SELECT * FROM INFORMATION_SCHEMA.views
";

    foreach(string Script in new Subtext.Scripting.ScriptSplitter(strSQL ))
    {
        Console.WriteLine(Script);
    }

Si tiene problemas con los comentarios de estilo c multilínea, elimine los comentarios con expresiones regulares:

static string RemoveCstyleComments(string strInput)
{
    string strPattern = @"/[*][\w\d\s]+[*]/";
    //strPattern = @"/\*.*?\*/"; // Doesn't work
    //strPattern = "/\\*.*?\\*/"; // Doesn't work
    //strPattern = @"/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+/ "; // Doesn't work
    //strPattern = @"/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+/ "; // Doesn't work

    // http://stackoverflow.com/questions/462843/improving-fixing-a-regex-for-c-style-block-comments
    strPattern = @"/\*(?>(?:(?>[^*]+)|\*(?!/))*)\*/";  // Works !

    string strOutput = System.Text.RegularExpressions.Regex.Replace(strInput, strPattern, string.Empty, System.Text.RegularExpressions.RegexOptions.Multiline);
    Console.WriteLine(strOutput);
    return strOutput;
} // End Function RemoveCstyleComments

La eliminación de comentarios de una sola línea está aquí:

https://stackoverflow.com/questions/9842991/regex-to-remove-single-line-sql-comments

También me enfrenté al mismo problema, y no pude encontrar otra manera que dividir la única operación SQL en archivos separados, luego ejecutarlos todos en secuencia.

Obviamente el problema no es con listas de comandos DML, se pueden ejecutar sin IR en el medio; historia diferente con DDL (create, alter, drop...)

Si no desea ir a la ruta SMO, puede buscar y reemplazar "GO" por ";" y la consulta como lo haría. Tenga en cuenta que soly el último conjunto de resultados será devuelto.

He logrado esto hoy cargando mi SQL desde un archivo de texto en una cadena. Luego utilicé la función string Split para separar la cadena en comandos individuales que luego se enviaban al servidor individualmente. Simples:)

Acaba de darse cuenta de que necesita dividir en \nGO en caso de que las letras aparezcan en cualquiera de los nombres de sus tablas, etc. ¡Supongo que tuve suerte allí!

Si no desea utilizar SMO (que es mejor que la solución a continuación, pero quiero dar una alternativa...) puede dividir su consulta con esta función.

Es:

• Prueba de comentario (ejemplo GO GO o /* GO*/)
• Solo funciona en una línea nueva, al igual que en SSMS (ejemplo /* test /* GO funciona y selecciona 1 como go not

• Prueba de cadena (ejemplo print 'no go')

  private List<string> SplitScriptGo(string script)
  {
      var result = new List<string>();
      int pos1 = 0;
      int pos2 = 0;
      bool whiteSpace = true;
      bool emptyLine = true;
      bool inStr = false;
      bool inComment1 = false;
      bool inComment2 = false;
  
      while (true)
      {
          while (pos2 < script.Length && Char.IsWhiteSpace(script[pos2]))
          {
              if (script[pos2] == '\r' || script[pos2] == '\n')
              {
                  emptyLine = true;
                  inComment1 = false;
              }
  
              pos2++;
          }
  
          if (pos2 == script.Length)
              break;
  
          bool min2 = (pos2 + 1) < script.Length;
          bool min3 = (pos2 + 2) < script.Length;
  
          if (!inStr && !inComment2 && min2 && script.Substring(pos2, 2) == "--")
              inComment1 = true;
  
          if (!inStr && !inComment1 && min2 && script.Substring(pos2, 2) == "/*")
              inComment2 = true;
  
          if (!inComment1 && !inComment2 && script[pos2] == '\'')
              inStr = !inStr;
  
          if (!inStr && !inComment1 && !inComment2 && emptyLine
              && (min2 && script.Substring(pos2, 2).ToLower() == "go")
              && (!min3 || char.IsWhiteSpace(script[pos2 + 2]) || script.Substring(pos2 + 2, 2) == "--" || script.Substring(pos2 + 2, 2) == "/*"))
          {
              if (!whiteSpace)
                  result.Add(script.Substring(pos1, pos2 - pos1));
  
              whiteSpace = true;
              emptyLine = false;
              pos2 += 2;
              pos1 = pos2;
          }
          else
          {
              pos2++;
              whiteSpace = false;
  
              if (!inComment2)
                  emptyLine = false;
          }
  
          if (!inStr && inComment2 && pos2 > 1 && script.Substring(pos2 - 2, 2) == "*/")
              inComment2 = false;
      }
  
      if (!whiteSpace)
          result.Add(script.Substring(pos1));
  
      return result;
  }
  

Utilice el siguiente método para dividir la cadena y ejecutar lote por lote

using System;
using System.IO;
using System.Text.RegularExpressions;
namespace RegExTrial
{
    class Program
    {
        static void Main(string[] args)
        {
            string sql = String.Empty;
            string path=@"D:\temp\sample.sql";
            using (StreamReader reader = new StreamReader(path)) {
                sql = reader.ReadToEnd();
            }            
            //Select any GO (ignore case) that starts with at least 
            //one white space such as tab, space,new line, verticle tab etc
            string pattern="[\\s](?i)GO(?-i)";

            Regex matcher = new Regex(pattern, RegexOptions.Compiled);
            int start = 0;
            int end = 0;
            Match batch=matcher.Match(sql);
            while (batch.Success) {
                end = batch.Index;
                string batchQuery = sql.Substring(start, end - start).Trim();
                //execute the batch
                ExecuteBatch(batchQuery);
                start = end + batch.Length;
                batch = matcher.Match(sql,start);
            }

        }

        private static void ExecuteBatch(string command)
        { 
            //execute your query here
        }

    }
}

Tuve el mismo problema en Java y lo resolví con un poco de lógica y expresiones regulares. Creo que se puede aplicar la misma lógica.Primero leí el archivo slq en la memoria. Entonces aplico la siguiente lógica. Es más o menos lo que se ha dicho antes, sin embargo, creo que el uso de regex word bound es más seguro que esperar una nueva línea char.

String pattern = "\\bGO\\b|\\bgo\\b";

String[] splitedSql = sql.split(pattern);
for (String chunk : splitedSql) {
  getJdbcTemplate().update(chunk);
}

Esto básicamente divide la cadena sql en una matriz de cadenas sql. La expresión regular es básicamente para detectar palabras 'go' completas, ya sea en minúsculas o en mayúsculas caso. Luego se ejecutan las diferentes querys secuencialmente.

Golpeé este mismo problema y finalmente lo resolví con un simple reemplazo de cadena, reemplazando la palabra GO con un punto y coma (;)

Todo parece estar funcionando bien al ejecutar scripts con comentarios en línea, comentarios de bloque y comandos GO

public static bool ExecuteExternalScript(string filePath)
{
    using (StreamReader file = new StreamReader(filePath))
    using (SqlConnection conn = new SqlConnection(dbConnStr))
    {
        StringBuilder sql = new StringBuilder();

        string line;
        while ((line = file.ReadLine()) != null)
        {
            // replace GO with semi-colon
            if (line == "GO")
                sql.Append(";");
            // remove inline comments
            else if (line.IndexOf("--") > -1)
                sql.AppendFormat(" {0} ", line.Split(new string[] { "--" }, StringSplitOptions.None)[0]);
            // just the line as it is
            else
                sql.AppendFormat(" {0} ", line);
        }
        conn.Open();

        SqlCommand cmd = new SqlCommand(sql.ToString(), conn);
        cmd.ExecuteNonQuery();
    }

    return true;
}

Para evitar terceros, expresiones regulares, gastos generales de memoria y trabajo rápido con scripts grandes, creé mi propio analizador basado en stream. It

• comprueba la sintaxis antes de

• Puede reconocer comentarios con-o /**/

  -- some commented text
   /*
  drop table Users;
  GO
     */
  

• Puede reconocer literales de cadena con ' o "

  set @s =
      'create table foo(...);
      GO
      create index ...';
  

• conserva el formato LF y CR
• conserva el bloque de comentarios en los cuerpos de los objetos (procedimientos almacenados, vistas, etc.)

• Y otras construcciones tales as

        gO -- commented text
  

Cómo usar

    try
    {
        using (SqlConnection connection = new SqlConnection("Integrated Security=SSPI;Persist Security Info=True;Initial Catalog=DATABASE-NAME;Data Source=SERVER-NAME"))
        {
            connection.Open();

            int rowsAffected = SqlStatementReader.ExecuteSqlFile(
                "C:\\target-sql-script.sql",
                connection,
                // Don't forget to use the correct file encoding!!!
                Encoding.Default,
                // Indefinitely (sec)
                0
            );
        }
    }
    // implement your handlers
    catch (SqlStatementReader.SqlBadSyntaxException) { }
    catch (SqlException) { }
    catch (Exception) { }

Lector de secuencias de comandos SQL basado en flujo

class SqlStatementReader
{
    public class SqlBadSyntaxException : Exception
    {
        public SqlBadSyntaxException(string description) : base(description) { }
        public SqlBadSyntaxException(string description, int line) : base(OnBase(description, line, null)) { }
        public SqlBadSyntaxException(string description, int line, string filePath) : base(OnBase(description, line, filePath)) { }
        private static string OnBase(string description, int line, string filePath)
        {
            if (filePath == null)
                return string.Format("Line: {0}. {1}", line, description);
            else
                return string.Format("File: {0}\r\nLine: {1}. {2}", filePath, line, description);
        }
    }

    enum SqlScriptChunkTypes
    {
        InstructionOrUnquotedIdentifier = 0,
        BracketIdentifier = 1,
        QuotIdentifierOrLiteral = 2,
        DblQuotIdentifierOrLiteral = 3,
        CommentLine = 4,
        CommentMultiline = 5,
    }

    StreamReader _sr = null;
    string _filePath = null;
    int _lineStart = 1;
    int _lineEnd = 1;
    bool _isNextChar = false;
    char _nextChar = '\0';

    public SqlStatementReader(StreamReader sr)
    {
        if (sr == null)
            throw new ArgumentNullException("StreamReader can't be null.");

        if (sr.BaseStream is FileStream)
            _filePath = ((FileStream)sr.BaseStream).Name;

        _sr = sr;
    }

    public SqlStatementReader(StreamReader sr, string filePath)
    {
        if (sr == null)
            throw new ArgumentNullException("StreamReader can't be null.");

        _sr = sr;
        _filePath = filePath;
    }

    public int LineStart { get { return _lineStart; } }
    public int LineEnd { get { return _lineEnd == 1 ? _lineEnd : _lineEnd - 1; } }

    public void LightSyntaxCheck()
    {
        while (ReadStatementInternal(true) != null) ;
    }

    public string ReadStatement()
    {
        for (string s = ReadStatementInternal(false); s != null; s = ReadStatementInternal(false))
        {
            // skip empty
            for (int i = 0; i < s.Length; i++)
            {
                switch (s[i])
                {
                    case ' ': continue;
                    case '\t': continue;
                    case '\r': continue;
                    case '\n': continue;
                    default:
                        return s;
                }
            }
        }
        return null;
    }

    string ReadStatementInternal(bool syntaxCheck)
    {
        if (_isNextChar == false && _sr.EndOfStream)
            return null;

        StringBuilder allLines = new StringBuilder();
        StringBuilder line = new StringBuilder();
        SqlScriptChunkTypes nextChunk = SqlScriptChunkTypes.InstructionOrUnquotedIdentifier;
        SqlScriptChunkTypes currentChunk = SqlScriptChunkTypes.InstructionOrUnquotedIdentifier;
        char ch = '\0';
        int lineCounter = 0;
        int nextLine = 0;
        int currentLine = 0;
        bool nextCharHandled = false;
        bool foundGO;
        int go = 1;

        while (ReadChar(out ch))
        {
            if (nextCharHandled == false)
            {
                currentChunk = nextChunk;
                currentLine = nextLine;

                switch (currentChunk)
                {
                    case SqlScriptChunkTypes.InstructionOrUnquotedIdentifier:

                        if (ch == '[')
                        {
                            currentChunk = nextChunk = SqlScriptChunkTypes.BracketIdentifier;
                            currentLine = nextLine = lineCounter;
                        }
                        else if (ch == '"')
                        {
                            currentChunk = nextChunk = SqlScriptChunkTypes.DblQuotIdentifierOrLiteral;
                            currentLine = nextLine = lineCounter;
                        }
                        else if (ch == '\'')
                        {
                            currentChunk = nextChunk = SqlScriptChunkTypes.QuotIdentifierOrLiteral;
                            currentLine = nextLine = lineCounter;
                        }
                        else if (ch == '-' && (_isNextChar && _nextChar == '-'))
                        {
                            nextCharHandled = true;
                            currentChunk = nextChunk = SqlScriptChunkTypes.CommentLine;
                            currentLine = nextLine = lineCounter;
                        }
                        else if (ch == '/' && (_isNextChar && _nextChar == '*'))
                        {
                            nextCharHandled = true;
                            currentChunk = nextChunk = SqlScriptChunkTypes.CommentMultiline;
                            currentLine = nextLine = lineCounter;
                        }
                        else if (ch == ']')
                        {
                            throw new SqlBadSyntaxException("Incorrect syntax near ']'.", _lineEnd + lineCounter, _filePath);
                        }
                        else if (ch == '*' && (_isNextChar && _nextChar == '/'))
                        {
                            throw new SqlBadSyntaxException("Incorrect syntax near '*'.", _lineEnd + lineCounter, _filePath);
                        }
                        break;

                    case SqlScriptChunkTypes.CommentLine:

                        if (ch == '\r' && (_isNextChar && _nextChar == '\n'))
                        {
                            nextCharHandled = true;
                            currentChunk = nextChunk = SqlScriptChunkTypes.InstructionOrUnquotedIdentifier;
                            currentLine = nextLine = lineCounter;
                        }
                        else if (ch == '\n' || ch == '\r')
                        {
                            currentChunk = nextChunk = SqlScriptChunkTypes.InstructionOrUnquotedIdentifier;
                            currentLine = nextLine = lineCounter;
                        }
                        break;

                    case SqlScriptChunkTypes.CommentMultiline:

                        if (ch == '*' && (_isNextChar && _nextChar == '/'))
                        {
                            nextCharHandled = true;
                            nextChunk = SqlScriptChunkTypes.InstructionOrUnquotedIdentifier;
                            nextLine = lineCounter;
                        }
                        else if (ch == '/' && (_isNextChar && _nextChar == '*'))
                        {
                            throw new SqlBadSyntaxException("Missing end comment mark '*/'.", _lineEnd + currentLine, _filePath);
                        }
                        break;

                    case SqlScriptChunkTypes.BracketIdentifier:

                        if (ch == ']')
                        {
                            nextChunk = SqlScriptChunkTypes.InstructionOrUnquotedIdentifier;
                            nextLine = lineCounter;
                        }
                        break;

                    case SqlScriptChunkTypes.DblQuotIdentifierOrLiteral:

                        if (ch == '"')
                        {
                            if (_isNextChar && _nextChar == '"')
                            {
                                nextCharHandled = true;
                            }
                            else
                            {
                                nextChunk = SqlScriptChunkTypes.InstructionOrUnquotedIdentifier;
                                nextLine = lineCounter;
                            }
                        }
                        break;

                    case SqlScriptChunkTypes.QuotIdentifierOrLiteral:

                        if (ch == '\'')
                        {
                            if (_isNextChar && _nextChar == '\'')
                            {
                                nextCharHandled = true;
                            }
                            else
                            {
                                nextChunk = SqlScriptChunkTypes.InstructionOrUnquotedIdentifier;
                                nextLine = lineCounter;
                            }
                        }
                        break;
                }
            }
            else
                nextCharHandled = false;

            foundGO = false;
            if (currentChunk == SqlScriptChunkTypes.InstructionOrUnquotedIdentifier || go >= 5 || (go == 4 && currentChunk == SqlScriptChunkTypes.CommentLine))
            {
                // go = 0 - break, 1 - begin of the string, 2 - spaces after begin of the string, 3 - G or g, 4 - O or o, 5 - spaces after GO, 6 - line comment after valid GO
                switch (go)
                {
                    case 0:
                        if (ch == '\r' || ch == '\n')
                            go = 1;
                        break;
                    case 1:
                        if (ch == ' ' || ch == '\t')
                            go = 2;
                        else if (ch == 'G' || ch == 'g')
                            go = 3;
                        else if (ch != '\n' && ch != '\r')
                            go = 0;
                        break;
                    case 2:
                        if (ch == 'G' || ch == 'g')
                            go = 3;
                        else if (ch == '\n' || ch == '\r')
                            go = 1;
                        else if (ch != ' ' && ch != '\t')
                            go = 0;
                        break;
                    case 3:
                        if (ch == 'O' || ch == 'o')
                            go = 4;
                        else if (ch == '\n' || ch == '\r')
                            go = 1;
                        else
                            go = 0;
                        break;
                    case 4:
                        if (ch == '\r' && (_isNextChar && _nextChar == '\n'))
                            go = 5;
                        else if (ch == '\n' || ch == '\r')
                            foundGO = true;
                        else if (ch == ' ' || ch == '\t')
                            go = 5;
                        else if (ch == '-' && (_isNextChar && _nextChar == '-'))
                            go = 6;
                        else
                            go = 0;
                        break;
                    case 5:
                        if (ch == '\r' && (_isNextChar && _nextChar == '\n'))
                            go = 5;
                        else if (ch == '\n' || ch == '\r')
                            foundGO = true;
                        else if (ch == '-' && (_isNextChar && _nextChar == '-'))
                            go = 6;
                        else if (ch != ' ' && ch != '\t')
                            throw new SqlBadSyntaxException("Incorrect syntax was encountered while parsing go.", _lineEnd + lineCounter, _filePath);
                        break;
                    case 6:
                        if (ch == '\r' && (_isNextChar && _nextChar == '\n'))
                            go = 6;
                        else if (ch == '\n' || ch == '\r')
                            foundGO = true;
                        break;
                    default:
                        go = 0;
                        break;
                }
            }
            else
                go = 0;

            if (foundGO)
            {
                if (ch == '\r' || ch == '\n')
                {
                    ++lineCounter;
                }
                // clear GO
                string s = line.Append(ch).ToString();
                for (int i = 0; i < s.Length; i++)
                {
                    switch (s[i])
                    {
                        case ' ': continue;
                        case '\t': continue;
                        case '\r': continue;
                        case '\n': continue;
                        default:
                            _lineStart = _lineEnd;
                            _lineEnd += lineCounter;
                            return allLines.Append(s.Substring(0, i)).ToString();
                    }
                }
                return string.Empty;
            }

            // accumulate by string
            if (ch == '\r' && (_isNextChar == false || _nextChar != '\n'))
            {
                ++lineCounter;
                if (syntaxCheck == false)
                    allLines.Append(line.Append('\r').ToString());
                line.Clear();
            }
            else if (ch == '\n')
            {
                ++lineCounter;
                if (syntaxCheck == false)
                    allLines.Append(line.Append('\n').ToString());
                line.Clear();
            }
            else
            {
                if (syntaxCheck == false)
                    line.Append(ch);
            }
        }

        // this is the end of the stream, return it without GO, if GO exists
        switch (currentChunk)
        {
            case SqlScriptChunkTypes.InstructionOrUnquotedIdentifier:
            case SqlScriptChunkTypes.CommentLine:
                break;
            case SqlScriptChunkTypes.CommentMultiline:
                if (nextChunk != SqlScriptChunkTypes.InstructionOrUnquotedIdentifier)
                    throw new SqlBadSyntaxException("Missing end comment mark '*/'.", _lineEnd + currentLine, _filePath);
                break;
            case SqlScriptChunkTypes.BracketIdentifier:
                if (nextChunk != SqlScriptChunkTypes.InstructionOrUnquotedIdentifier)
                    throw new SqlBadSyntaxException("Unclosed quotation mark [.", _lineEnd + currentLine, _filePath);
                break;
            case SqlScriptChunkTypes.DblQuotIdentifierOrLiteral:
                if (nextChunk != SqlScriptChunkTypes.InstructionOrUnquotedIdentifier)
                    throw new SqlBadSyntaxException("Unclosed quotation mark \".", _lineEnd + currentLine, _filePath);
                break;
            case SqlScriptChunkTypes.QuotIdentifierOrLiteral:
                if (nextChunk != SqlScriptChunkTypes.InstructionOrUnquotedIdentifier)
                    throw new SqlBadSyntaxException("Unclosed quotation mark '.", _lineEnd + currentLine, _filePath);
                break;
        }

        if (go >= 4)
        {
            string s = line.ToString();
            for (int i = 0; i < s.Length; i++)
            {
                switch (s[i])
                {
                    case ' ': continue;
                    case '\t': continue;
                    case '\r': continue;
                    case '\n': continue;
                    default:
                        _lineStart = _lineEnd;
                        _lineEnd += lineCounter + 1;
                        return allLines.Append(s.Substring(0, i)).ToString();
                }
            }
        }

        _lineStart = _lineEnd;
        _lineEnd += lineCounter + 1;
        return allLines.Append(line.ToString()).ToString();
    }

    bool ReadChar(out char ch)
    {
        if (_isNextChar)
        {
            ch = _nextChar;
            if (_sr.EndOfStream)
                _isNextChar = false;
            else
                _nextChar = Convert.ToChar(_sr.Read());
            return true;
        }
        else if (_sr.EndOfStream == false)
        {
            ch = Convert.ToChar(_sr.Read());
            if (_sr.EndOfStream == false)
            {
                _isNextChar = true;
                _nextChar = Convert.ToChar(_sr.Read());
            }
            return true;
        }
        else
        {
            ch = '\0';
            return false;
        }
    }

    public static int ExecuteSqlFile(string filePath, SqlConnection connection, Encoding fileEncoding, int commandTimeout)
    {
        int rowsAffected = 0;
        using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
        {
            // Simple syntax check (you can comment out these two lines below)
            new SqlStatementReader(new StreamReader(fs, fileEncoding)).LightSyntaxCheck();
            fs.Seek(0L, SeekOrigin.Begin);

            // Read statements without GO
            SqlStatementReader rd = new SqlStatementReader(new StreamReader(fs, fileEncoding));
            string stmt;
            while ((stmt = rd.ReadStatement()) != null)
            {
                using (SqlCommand cmd = connection.CreateCommand())
                {
                    cmd.CommandText = stmt;
                    cmd.CommandTimeout = commandTimeout;
                    int i = cmd.ExecuteNonQuery();
                    if (i > 0)
                        rowsAffected += i;
                }
            }
        }
        return rowsAffected;
    }
}

Miro esto un par de veces al final decidido con EF implementación Un poco modificado para SqlConnection

public static void ExecuteSqlScript(this SqlConnection sqlConnection, string sqlBatch)
        {
            // Handle backslash utility statement (see http://technet.microsoft.com/en-us/library/dd207007.aspx)
            sqlBatch = Regex.Replace(sqlBatch, @"\\(\r\n|\r|\n)", string.Empty);

            // Handle batch splitting utility statement (see http://technet.microsoft.com/en-us/library/ms188037.aspx)
            var batches = Regex.Split(
                sqlBatch,
                string.Format(CultureInfo.InvariantCulture, @"^\s*({0}[ \t]+[0-9]+|{0})(?:\s+|$)", BatchTerminator),
                RegexOptions.IgnoreCase | RegexOptions.Multiline);

            for (int i = 0; i < batches.Length; ++i)
            {
                // Skip batches that merely contain the batch terminator
                if (batches[i].StartsWith(BatchTerminator, StringComparison.OrdinalIgnoreCase) ||
                    (i == batches.Length - 1 && string.IsNullOrWhiteSpace(batches[i])))
                {
                    continue;
                }

                // Include batch terminator if the next element is a batch terminator
                if (batches.Length > i + 1 &&
                    batches[i + 1].StartsWith(BatchTerminator, StringComparison.OrdinalIgnoreCase))
                {
                    int repeatCount = 1;

                    // Handle count parameter on the batch splitting utility statement
                    if (!string.Equals(batches[i + 1], BatchTerminator, StringComparison.OrdinalIgnoreCase))
                    {
                        repeatCount = int.Parse(Regex.Match(batches[i + 1], @"([0-9]+)").Value, CultureInfo.InvariantCulture);
                    }

                    for (int j = 0; j < repeatCount; ++j)
                    {
                       var command = sqlConnection.CreateCommand();
                       command.CommandText = batches[i];
                       command.ExecuteNonQuery();
                    }
                }
                else
                {
                    var command = sqlConnection.CreateCommand();
                    command.CommandText = batches[i];
                    command.ExecuteNonQuery();
                }
            }
        }

Demasiado difícil:)

Crear matriz de cadenas str [] reemplazando GO con",@":

            string[] str ={
                @"
USE master;
",@"


CREATE DATABASE " +con_str_initdir+ @";
",@"
-- Verify the database files and sizes
--SELECT name, size, size*1.0/128 AS [Size in MBs] 
--SELECT name 
--FROM sys.master_files
--WHERE name = N'" + con_str_initdir + @"';
--GO

USE " + con_str_initdir + @";
",@"

SET ANSI_NULLS ON
",@"
SET QUOTED_IDENTIFIER ON
",@"

IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Customers]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Customers](
    [CustomerID] [int] IDENTITY(1,1) NOT NULL,
    [CustomerName] [nvarchar](50) NULL,
 CONSTRAINT [PK_Customers] PRIMARY KEY CLUSTERED 
(
    [CustomerID] ASC
)WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
",@"



SET ANSI_NULLS ON
",@"
SET QUOTED_IDENTIFIER ON
",@"
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[GOODS]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[GOODS](
    [GoodsID] [int] IDENTITY(1,1) NOT NULL,
    [GoodsName] [nvarchar](50) NOT NULL,
    [GoodsPrice] [float] NOT NULL,
 CONSTRAINT [PK_GOODS] PRIMARY KEY CLUSTERED 
(
    [GoodsID] ASC
)WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
",@"
SET ANSI_NULLS ON
",@"
SET QUOTED_IDENTIFIER ON
",@"
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Orders]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Orders](
    [OrderID] [int] IDENTITY(1,1) NOT NULL,
    [CustomerID] [int] NOT NULL,
    [Date] [smalldatetime] NOT NULL,
 CONSTRAINT [PK_Orders] PRIMARY KEY CLUSTERED 
(
    [OrderID] ASC
)WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
",@"
SET ANSI_NULLS ON
",@"
SET QUOTED_IDENTIFIER ON
",@"
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[OrderDetails]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[OrderDetails](
    [OrderID] [int] NOT NULL,
    [GoodsID] [int] NOT NULL,
    [Qty] [int] NOT NULL,
    [Price] [float] NOT NULL,
 CONSTRAINT [PK_OrderDetails] PRIMARY KEY CLUSTERED 
(
    [OrderID] ASC,
    [GoodsID] ASC
)WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
",@"

SET ANSI_NULLS ON
",@"
SET QUOTED_IDENTIFIER ON
",@"
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[InsertCustomers]') AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'-- =============================================
-- Author:      <Author,,Name>
-- Create date: <Create Date,,>
-- Description: <Description,,>
-- =============================================
create PROCEDURE [dbo].[InsertCustomers]
 @CustomerName nvarchar(50),
 @Identity int OUT
AS
INSERT INTO Customers (CustomerName) VALUES(@CustomerName)
SET @Identity = SCOPE_IDENTITY()

' 
END
",@"
IF NOT EXISTS (SELECT * FROM sys.foreign_keys WHERE object_id = OBJECT_ID(N'[dbo].[FK_Orders_Customers]') AND parent_object_id = OBJECT_ID(N'[dbo].[Orders]'))
ALTER TABLE [dbo].[Orders]  WITH CHECK ADD  CONSTRAINT [FK_Orders_Customers] FOREIGN KEY([CustomerID])
REFERENCES [dbo].[Customers] ([CustomerID])
ON UPDATE CASCADE
",@"
ALTER TABLE [dbo].[Orders] CHECK CONSTRAINT [FK_Orders_Customers]
",@"
IF NOT EXISTS (SELECT * FROM sys.foreign_keys WHERE object_id = OBJECT_ID(N'[dbo].[FK_OrderDetails_GOODS]') AND parent_object_id = OBJECT_ID(N'[dbo].[OrderDetails]'))
ALTER TABLE [dbo].[OrderDetails]  WITH CHECK ADD  CONSTRAINT [FK_OrderDetails_GOODS] FOREIGN KEY([GoodsID])
REFERENCES [dbo].[GOODS] ([GoodsID])
ON UPDATE CASCADE
",@"
ALTER TABLE [dbo].[OrderDetails] CHECK CONSTRAINT [FK_OrderDetails_GOODS]
",@"
IF NOT EXISTS (SELECT * FROM sys.foreign_keys WHERE object_id = OBJECT_ID(N'[dbo].[FK_OrderDetails_Orders]') AND parent_object_id = OBJECT_ID(N'[dbo].[OrderDetails]'))
ALTER TABLE [dbo].[OrderDetails]  WITH CHECK ADD  CONSTRAINT [FK_OrderDetails_Orders] FOREIGN KEY([OrderID])
REFERENCES [dbo].[Orders] ([OrderID])
ON UPDATE CASCADE
ON DELETE CASCADE
",@"
ALTER TABLE [dbo].[OrderDetails] CHECK CONSTRAINT [FK_OrderDetails_Orders]


                "};


            for(int i =0; i<str.Length;i++)     
            {
                myCommand.CommandText=str[i];
                try
                {
                myCommand.ExecuteNonQuery();
                }
                catch (SystemException ee)
                {
                    MessageBox.Show("Error   "+ee.ToString());
                }

            }

Eso es todo, disfruta.