1.前端代码:
<asp:DropDownList ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
<asp:ListItem Value="-1">-请选择--</asp:ListItem>
<asp:ListItem Value="0">二手出售</asp:ListItem>
<asp:ListItem Value="1">转寄</asp:ListItem>
</asp:DropDownList>
事件OnSelectedIndexChanged=”DropDownList1_SelectedIndexChanged”需要加上
2.后台代码
public class ctrlRefundWay : UserControl
{
protected DropDownList DropDownList1;
public delegate void SelectedChanged(object sender, EventArgs e);
public event SelectedChanged SelectedChangedEx;
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
if (this.SelectedChangedEx != null)
{
this.SelectedChangedEx(sender, e);
}
}
protected void Page_Load(object sender, EventArgs e)
{
bool isPostBack = base.IsPostBack;
}
public bool AutoPostBackEx
{
set
{
this.DropDownList1.AutoPostBack = value;
}
}
}
3.其他页面引用该控件
1)前段页面
<%@ Register Src="~/CommonCtrl/ctrlRefundWay.ascx" TagPrefix="uc1" TagName="ctrlRefundWay" %>
<uc1:ctrlRefundWay runat="server" ID="ctrlRefundWay" />
2)后台代码
protected void Page_Load(object sender, EventArgs e)
{
this.ctrlRefundWay.AutoPostBackEx = true;
this.ctrlRefundWay.SelectedChangedEx += new CommonCtrl.ctrlRefundWay.SelectedChanged(ctrlRefundWay_SelectedChangedEx);
}
**private void ctrlRefundWay_SelectedChangedEx(object sender, EventArgs e)
{
MessageBox.Show(this, "start your code");
}**