sql count 结果怎么在C#中返回

using System.Data.SqlClient;

 

SqlConnection conn =new SqlConnection(

"server=localhost; Initial Catalog= 数据库的名字 ;Integrated Security=SSPI");

 

SqlCommand countCmd = conn.CreateCommand();

countCmd.CommandText="select count(no) as noCount from 表 ";

 

conn.Open();

 

int num = (int)countCmd.ExecuteScalar();

countCmd.Dispose();

conn.Close();