如何从sql server导出到csv文件

如何从sql server导出到csv文件，具体代码如下：

 

private static void WriteHeader(SqlDataReader reader, TextWriter output)

   {

       for (int i = 0; i < reader.FieldCount; i++)

       {

           if (i > 0)

               output.Write(',');

           output.Write(reader.GetName(i));

       }

       output.WriteLine();

   }

 

private static void WriteData(SqlDataReader reader, TextWriter output)

   {

       for (int i = 0; i < reader.FieldCount; i++)

       {

           if (i > 0)

               output.Write(',');

           String v = reader[i].ToString();

           if (v.Contains(',') || v.Contains('\n') || v.Contains('\r') || v.Contains('"'))

           {

               output.Write('"');

               output.Write(v.Replace("\"", "\"\""));

               output.Write('"');

           }

           else

           {

               output.Write(v);

           }

       }

       output.WriteLine();

   }