csharp(C#) 调用SQL自定义函数返回值

代码 1 /// <summary>
2 /// 获取项目文件编号 geovindu@163.com 涂聚文
3 /// </summary>
4 private void FileNo()
5 {
6
7 SqlConnection conn = new SqlConnection(connectionString);
8 string strSql = "GetProjectID"; //自定SQL函數
9 SqlCommand cmd = new SqlCommand(strSql, conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@headStr", SqlDbType.NVarChar).Value = "ZQ3"; //輸入參數
cmd.Parameters.Add("@date", SqlDbType.DateTime).Value = System.DateTime.Now.ToShortDateString(); //輸入參數
cmd.Parameters.Add("@returnString", SqlDbType.NVarChar);
cmd.Parameters["@returnString"].Direction = ParameterDirection.ReturnValue; //返回參數
try
{
conn.Open();
object o= cmd.ExecuteScalar();

this.txtAFileNO.Text = cmd.Parameters["@returnString"].Value.ToString();

//Response.Write("");

}
catch (Exception ex)
{

this.txtAFileNO.Text = ex.Message;

}
finally
{

if (!(conn.State == ConnectionState.Closed))
{

conn.Close();

}

}

}