为什么用UpdateCommand更新数据库不报错也不更新?
数据库结构:
表名:NewsClass
字段名:ClassID,ClassName,ClassOrder
以下为测试代码:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class DateSet : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
SqlConnection Conn;
SqlDataAdapter SqlAdap;
Conn = new SqlConnection();
Conn.ConnectionString = System.Configuration.ConfigurationManager.AppSettings["SqlConnentionString"];
SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM NewsClass ORDER BY ClassOrder", Conn);
DataSet ds = new DataSet();
da.Fill(ds, "NewsClass");
da.UpdateCommand = new SqlCommand("UPDATE NewsClass SET ClassOrder = 4 WHERE ClassID = 4", Conn);
da.Update(ds.Tables[0]);
}
}