异步处理转发器事件
我的页面（asp.net）上有一个自定义搜索控件，其中包含一个文本框和一个用于显示结果的转发器。
当用户键入时，中继器会填充回调......漂亮而简单的回调。
...
当选择搜索结果时，中继器会触发回发并引发 itemcommand 事件（如预期）...并且此事件向其自身添加一个子中继器并将子列表绑定到当前项目。
我的问题是，我不希望我的父中继器触发完整的回发，因为该页面的渲染非常耗时。 我尝试将控件/仅将外部中继器放入 ajax 更新面板控件中，但它似乎仍然会触发完整的回发。
任何人都可以阐明如何告诉中继器在回调而不是回发中触发其项目命令事件吗？
我猜这涉及到我的中继器项目控件的大量手动接线，但我希望有一个控件可以为我处理所有这些:)
编辑：我的情况示例....
<asp:UpdatePanel ... >
<asp:Repeater ...>
<itemTemplate> <asp:LinkButton ... CommandArg='<%= Eval("ID") %>' CommandName="select" /> </itemTemplate>
</asp:Repeater>
</asp:UpdatePanel>
所以我的问题是...
我如何告诉转发器“触发此链接按钮 onclick 作为回调而不是回发”
将转发器包装在更新面板中的过程没有帮助，因为链接按钮的 ID 是动态的，因此我不能（不是无论如何都是内联的）为链接按钮添加一个触发器。
如果我在中继器 onitembound 事件中手动向面板添加触发器，我会收到来自 .Net 的异常，说回调引用无效...我猜这是因为我试图将回调触发器附加到已经处理的控件回发事件或中继器设置的某些内容...
编辑2：这里面临的场景示例
本质上是因为此控件在页面上的X次几乎所有内容都必须是动态的。 该控件实现 ICallbackHandler，并且当用户输入公司名称时，搜索 bx 代码（下面未包含）会触发 ajax 调用 onkeyup（因此它的工作方式有点像 google）。
我希望当用户单击列表中的公司名称时，它会 ajax 回调/部分回发来恢复分支的子列表，从而防止完整回发时出现完整页面闪烁。
然后，用户选择一个分支，它将执行完整的回发，这将导致发生多个服务器操作。
这工作得很好......它只是不是最干净的用户体验。
<div id='<%= this.UniqueID + "Results" %>' class="results">
<asp:Repeater ID="ui_lstCompanies" runat="server" onitemcommand="ui_lstCompanies_ItemCommand">
<HeaderTemplate>
<ul>
</HeaderTemplate>
<ItemTemplate>
<asp:Panel ID="item" runat="server">
<li>
<asp:LinkButton ID="ui_btnSelectCompany" runat="server" CommandName="Select" Text='<%# Eval("Name") %>' />
</li>
</asp:Panel>
<asp:Panel ID="selectedItem" runat="server" Visible="false">
<li>
<hr /><h4><%# Eval("Name") %></h4>
<asp:Repeater ID="ui_lstBranches" runat="server" onitemcommand="ui_lstBranches_ItemCommand" >
<HeaderTemplate>
<table style="border-collapse:collapse;">
<tr><th> </th><th>Branch Name</th><th>Branch Address</th><th>Tel</th><th>Fax</th><th>Email</th></tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td> </td>
<td><asp:LinkButton ID="ui_btnSelectBranch1" runat="server" CommandArgument='<%# Eval("ID") %>' CommandName="Select" Text='<%# Eval("Name") %>' /></td>
<td><asp:LinkButton ID="ui_btnSelectBranch2" runat="server" CommandArgument='<%# Eval("ID") %>' CommandName="Select" Text='<%# Eval("Address") %>' /></td></td>
<td><asp:LinkButton ID="ui_btnSelectBranch3" runat="server" CommandArgument='<%# Eval("ID") %>' CommandName="Select" Text='<%# Eval("Telephone1") %>' /></td></td>
<td><asp:LinkButton ID="ui_btnSelectBranch4" runat="server" CommandArgument='<%# Eval("ID") %>' CommandName="Select" Text='<%# Eval("Fax") %>' /></td></td>
<td><asp:LinkButton ID="ui_btnSelectBranch5" runat="server" CommandArgument='<%# Eval("ID") %>' CommandName="Select" Text='<%# Eval("Email") %>' /></td></td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
<hr />
</li>
</asp:Panel>
</ItemTemplate>
<FooterTemplate>
</ul>
</FooterTemplate>
</asp:Repeater>
</div>
I have a custom search control on my page (asp.net) which contains a textbox and a repeater for displaying results.
The repeater is populated with a callback as the user types ... nice and simple callback.
...
When a search result is selected the repeater fires off a postback and the itemcommand event is raised (as expected) ... and this event adds a child repeater to itself and binds a child list to the current item.
My problem is that I don't want my parent repeater to fire off a full postback because the page is quite time consuming to render.
I tried putting the control / just the outer repeater in to an ajax update panel control but it appears to still fire a ful postback.
Can anyone shed any light on how I might tell a repeater to fire its item command event in a callback instead of a postback?
I'm guessing this involves a load of manual wiring for my repeater item controls but i'm hoping theres a control somewhere that handles all that for me :)
EDIT : Sample of my situation ....
<asp:UpdatePanel ... >
<asp:Repeater ...>
<itemTemplate> <asp:LinkButton ... CommandArg='<%= Eval("ID") %>' CommandName="select" /> </itemTemplate>
</asp:Repeater>
</asp:UpdatePanel>
So my question is ...
How do i tell the repeater "fire this link buttons onclick as a callback instead of a postback"
the process of wrapping up the repeater in an update panel doesn't help because the ID of the link button is dynamic and therefore I cannot (not inline anyway) add a trigger for the link button.
If i manually add a trigger to the panel in the repeaters onitembound event i get an exception from .Net sayingt he callback reference is invalid ... i guess this is because im trying to attach a callback trigger to a control that is already handling a postback event or something setup by the repeater ...
EDIT 2 : Sample of the scenario faced here
essentially because this control X number of times on the page virtually everything has to be dynamic.
The control implements ICallbackHandler and the search bx code (not included below) fires off an ajax call onkeyup when the user types in company names (so it works a bit like google).
I was hoping that when a user clicked on a company name from the list it would ajax call back / partial postback to recover the sub list of branches thus preventing the full page flicker you get with a full postback.
Then a user would select a branch and it would do a full postback which would result in several server actions taking place.
This works fine as is ... its just not the cleanest user experience.
<div id='<%= this.UniqueID + "Results" %>' class="results">
<asp:Repeater ID="ui_lstCompanies" runat="server" onitemcommand="ui_lstCompanies_ItemCommand">
<HeaderTemplate>
<ul>
</HeaderTemplate>
<ItemTemplate>
<asp:Panel ID="item" runat="server">
<li>
<asp:LinkButton ID="ui_btnSelectCompany" runat="server" CommandName="Select" Text='<%# Eval("Name") %>' />
</li>
</asp:Panel>
<asp:Panel ID="selectedItem" runat="server" Visible="false">
<li>
<hr /><h4><%# Eval("Name") %></h4>
<asp:Repeater ID="ui_lstBranches" runat="server" onitemcommand="ui_lstBranches_ItemCommand" >
<HeaderTemplate>
<table style="border-collapse:collapse;">
<tr><th> </th><th>Branch Name</th><th>Branch Address</th><th>Tel</th><th>Fax</th><th>Email</th></tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td> </td>
<td><asp:LinkButton ID="ui_btnSelectBranch1" runat="server" CommandArgument='<%# Eval("ID") %>' CommandName="Select" Text='<%# Eval("Name") %>' /></td>
<td><asp:LinkButton ID="ui_btnSelectBranch2" runat="server" CommandArgument='<%# Eval("ID") %>' CommandName="Select" Text='<%# Eval("Address") %>' /></td></td>
<td><asp:LinkButton ID="ui_btnSelectBranch3" runat="server" CommandArgument='<%# Eval("ID") %>' CommandName="Select" Text='<%# Eval("Telephone1") %>' /></td></td>
<td><asp:LinkButton ID="ui_btnSelectBranch4" runat="server" CommandArgument='<%# Eval("ID") %>' CommandName="Select" Text='<%# Eval("Fax") %>' /></td></td>
<td><asp:LinkButton ID="ui_btnSelectBranch5" runat="server" CommandArgument='<%# Eval("ID") %>' CommandName="Select" Text='<%# Eval("Email") %>' /></td></td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
<hr />
</li>
</asp:Panel>
</ItemTemplate>
<FooterTemplate>
</ul>
</FooterTemplate>
</asp:Repeater>
</div>
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评论（2）
我有和你类似的问题。如果您将 linkbuttons 替换为常规的 asp:button 并继续像以前一样使用转发器的 itemcommand 事件，它将起作用。为什么？我不知道。然而，它确实有效。它可能不太适合您的设计，但它会触发您想要的异步回发。
I had a similar problem as you did. If you replace the linkbuttons with regular asp:button and continue to use the repeater's itemcommand event as you were, it will work. Why? I don't know. However, it works. It may not look good with your design, but it triggers the asynch postback that you desired.
然后，这应该对来自 rpt1 的所有命令执行异步调用。
只需将这些中继器控件替换为您的
编辑：
我基本上已经使用不同的字段等创建了您的代码的模型。我假设下面的代码是您尝试过的，但它不起作用？如果是这样，那么我不知道为什么它在你这边不起作用，而在我这边却不起作用，一定有一些我们没有注意到的细微差别。
This should then perform an async call to all commands from rpt1.
Just Replace these repeater control's with yours
EDIT:
I've basically created a mockup of your code with different fields etc. I assume the code below is what you tried and it was not working? If so then I've got no idea why it's not working on your side as it is on myne, there must be some slight difference somewhere that we're not picking up.