do not doDropDownList1.SelectedIndexChanged += new System.EventHandler(DropDownList1_SelectedIndexChanged);
in Render(), do it in Init or Load event handler
in Render(), do it in Init or Load event handler
解决方案 »
- 高分请教 - Padding is invalid and cannot be removed.
- 收藏 不显示删除回复显示所有回复显示星级回复显示得分回复 做个B/S系统,要能具有传真的功能,具有权限的用户登入系统后 可以通过系统,然后通过传真机 根据系统提
- oncontextmenu不管用
- 连接ACCESS数据库中Web.config中这段代码什么意思,怎么用?
- 求一SQL语句,想了一下午了!
- 谁能帮帮我 看一下代码
- 奇!真的很奇.....
- 请教一个关于IIS的麻烦又痛苦的问题
- 请教各位ASP.Net高手,急!
- asp.net中的错误帮我看一下
- 有没有方法关掉自己的窗口?
- 紧急求助于:使用datagrid分页,若有模板列checkbox,怎样实现按一按钮能把所有分页中的checkbox都选中??
{ DropDownList1=new DropDownList();
for (int i=0;i<=9;i++)
{
DropDownList1.Items.Add(i.ToString());
}
DropDownList1.SelectedIndexChanged += new System.EventHandler(DropDownList1_SelectedIndexChanged);
DropDownList1.AutoPostBack=true; Controls.Add(DropDownList1);
Label1=new Label();
Label1.Text =DropDownList1.SelectedItem.Text;
Controls.Add(Label1);}protected override void Render(HtmlTextWriter output)
{
DropDownList1.RenderControl(output);
Label1.RenderControl(output);
}
using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;namespace WebControlLibrary1
{
[DefaultProperty("Text"),
ToolboxData("<{0}:DataControl2 runat=server></{0}:DataControl2>")]
public class DataControl2 : System.Web.UI.WebControls.WebControl,INamingContainer
{
DropDownList DropDownList1;
Label Label1;
private void DropDownList1_SelectedIndexChanged(object sender, System.EventArgs e)
{
Label1.Text =DropDownList1.SelectedItem.Text;
}
protected override void CreateChildControls()
{
DropDownList1=new DropDownList();
for (int i=0;i<=9;i++)
{
DropDownList1.Items.Add(i.ToString());
}
DropDownList1.SelectedIndexChanged += new System.EventHandler(DropDownList1_SelectedIndexChanged);
Controls.Add(DropDownList1);
Label1=new Label();
Label1.Text =DropDownList1.SelectedItem.Text;
Controls.Add(Label1);
DropDownList1.AutoPostBack=true;
}
protected override void Render(HtmlTextWriter output)
{
DropDownList1.RenderControl(output);
Label1.RenderControl(output);
}
}
}
protected override void OnInit(EventArgs e)