在我的页面中,我有一个LinkButton里面的中继器,但UpdatePanel找不到LinkButton到AsyncPostBackTrigger.
这是mycode.aspx
<asp:ScriptManager ID="Test1" runat="server" />
<asp:UpdatePanel ID="TestUpdate" runat="server" UpdateMode="Always">
<ContentTemplate>
<table width="100%">
<tr valign="top">
<td width="50%">
<asp:Repeater ID="productList" runat="server" onitemcommand="productList_ItemCommand">
<HeaderTemplate>
<ul type="disc">
</HeaderTemplate>
<ItemTemplate>
<li>
<asp:Label id="L1" runat="server" Text='<%# Eval("productName") %>'></asp:Label><br />
Price:
<asp:Label runat="server" Text='<%# Eval("productPrice") %>' ></asp:Label> Bath<br />
<img alt="" src="Images/product/product<%# Eval("productID") %>.png" style="width: 200px; height: 130px" /><br />
<asp:TextBox ID="num_product" runat="server" Text="0"></asp:TextBox><br />
<asp:LinkButton ID="order_button" runat="server"><img alt="" src="~/Images/button/order.png" /></asp:LinkButton>
</li>
</ItemTemplate>
<FooterTemplate>
</ul>
</FooterTemplate>
</asp:Repeater>
<td>
<span class="labelText">Order list</span>
<asp:BulletedList ID="orderList" runat="server" BulletStyle="Numbered">
</asp:BulletedList>
</td>
</tr>
</table>
</ContentTemplate>
</asp:UpdatePanel>
这里是mycode.aspx.cs
protected void productList_ItemCommand(object source,RepeaterCommandEventArgs e)
{
//button
/*LinkButton btn = new LinkButton();
btn.ID = "order_button";
btn.Click += LinkButton1_Click;
Test1.RegisterAsyncPostBackControl(btn);*/
LinkButton btn = (LinkButton)e.Item.FindControl("order_button");
btn.Click += LinkButton1_Click;
Test1.RegisterAsyncPostBackControl(btn);
/*AsyncPostBackTrigger trigger = new AsyncPostBackTrigger();
trigger.ControlID = btn.ClientID;
trigger.EventName = "Click";
TestUpdate.Triggers.Add(trigger);*/
}
protected void LinkButton1_Click(object sender,EventArgs e)
{
//string name = ProductName1.Text.ToString();
//int price = System.Convert.ToInt32(ProductPrice1.ToString(),10);
//int number = System.Convert.ToInt32(TextBox1.ToString(),10);
//orderList.Items.Clear();
//orderList.Items.Add(new ListItem(name));
//ListItem product1 = new ListItem();
//product1.Text = name;
orderList.Items.Add("test");
}
解决方法
Repeater控件内部的ItemCreated事件使用ScriptManager注册该按钮.
//Inside ItemCreatedEvent
ScriptManager scriptMan = ScriptManager.GetCurrent(this);
LinkButton btn = e.Item.FindControl("order_button") as LinkButton;
if(btn != null)
{
btn.Click += LinkButton1_Click;
scriptMan.RegisterAsyncPostBackControl(btn);
}
