Execute a large SQL script (with GO commands)

This is what I knocked together to solve my immediate problem.

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();
    }
}

It requires GO commands to be on their own line, and will not detect block-comments, so this sort of thing will get split, and cause an error:

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

Use SQL Server Management Objects (SMO) which understands GO separators. See my blog post here: http://weblogs.asp.net/jongalloway/Handling-_2200_GO_2200_-Separators-in-SQL-Scripts-2D00-the-easy-way

Sample code:

public static void Main()    
{        
  string scriptDirectory = "c:\\temp\\sqltest\\";
  string sqlConnectionString = "Integrated Security=SSPI;" +
  "Persist Security Info=True;Initial Catalog=Northwind;Data Source=(local)";
  DirectoryInfo di = new DirectoryInfo(scriptDirectory);
  FileInfo[] rgFiles = di.GetFiles("*.sql");
  foreach (FileInfo fi in rgFiles)
  {
        FileInfo fileInfo = new FileInfo(fi.FullName);
        string script = fileInfo.OpenText().ReadToEnd();
        using (SqlConnection connection = new SqlConnection(sqlConnectionString))
        {
            Server server = new Server(new ServerConnection(connection));
            server.ConnectionContext.ExecuteNonQuery(script);
        }
   }
}

If that won't work for you, see Phil Haack's library which handles that: http://haacked.com/archive/2007/11/04/a-library-for-executing-sql-scripts-with-go-separators-and.aspx