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我正在从SqlDataReader生成一个csv文件,但是它没有写出列名,我怎么能让它写出来？我正在使用的代码如下:

SqlConnection conn = new SqlConnection(myconn);
SqlCommand cmd = new SqlCommand("dbo.test", conn);
cmd.CommandType = CommandType.StoredProcedure;
conn.Open();
SqlDataReader reader = cmd.ExecuteReader();

StringBuilder sb = new StringBuilder();
StreamWriter sw = new StreamWriter(myfilePath + "testfile.csv"); 
while (reader.Read())
{
    for (int i = 0; i < reader.FieldCount; i++)
    {
        string value = reader[i].ToString();
        if (value.Contains(","))
            value = "\"" + value + "\"";

        sb.Append(value.Replace(Environment.NewLine, " ") + ",");
    }
    sb.Length--; // Remove the last comma
    sb.AppendLine();
}
conn.Close();
sw.Write(sb.ToString());
sw.Close();