c# ItemDataBound 新事件处理程序

本文关键字：程序 事件处理 ItemDataBound | 更新日期: 2023-09-27 18:24:27

    protected virtual void DataGrid1_ItemDataBound(object sender, DataGridItemEventArgs e)
    {
      this.list = (DropDownList)e.Item.FindControl("edit_list");
      if (list != null)
      {
         list.SelectedIndexChanged += new EventHandler(List_SelectedIndexChanged);
       }     
    }

列表已分配，但选定的索引事件处理程序不起作用如果我做RepairsStateList.BackColor = Color.Black;它正在工作

protected void List_SelectedIndexChanged(object source, System.EventArgs e)
{
    Response.Write("<script>alert('vv') </script>");
}

c# ItemDataBound 新事件处理程序

此下拉列表的AutoPostBack属性必须设置为 true...

比你的代码必须 

protected void dropdownlist1_SelectedIndexChanged(object sender, EventArgs e)    {        
// get reference to the row
GridViewRow gvr = (GridViewRow)(((Control)sender).NamingContainer);   
// Get the reference of this DropDownlist
DropDownList dropdownlist1 = (DropDownList) gvr.FindControl("dropdownlist1");
}

编辑

将此行替换为 

this.list = (DropDownList)e.Item.FindControl("edit_list");

这 

  DropDownList list = (DropDownList)e.Item.FindControl("edit_list");
  if (list != null)
  {
     list.SelectedIndexChanged += new EventHandler(List_SelectedIndexChanged);
   }
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