ImageButton 不会在转发器控件中触发 OnItemCommand
每个人！ 我正在我的网页上编写中继器控件。在我为中继器添加数据分页后，我遇到了问题： ImageButton 不再触发中继器的 OnItemCommand 事件。为什么？
这是标记代码的一部分：
<asp:Repeater ID="PartsRepeater" runat="server"
OnItemCommand="partsRepeater_ItemCommand"
OnItemDataBound="partsRepeaterItem_Bound">
<HeaderTemplate>
<table rules="all" cellspacing="0" style="border-color: rgb(31, 77, 48);
border-style: solid; width: 100%; border-collapse: collapse;">
<tr >
<td style="width: 92%;">
<table cellspacing="0" border="0" style="border-color: rgb(31, 77, 48); border-style: solid;
width: 100%; border-collapse: collapse;">
<tr style="background-color: #1f4d30; color: white;">
<td style="width: 10%;">
<asp:Label runat="server" Text="Name" ID="lblName">
</asp:Label>
</td>
<td style="width: 10%;">
<asp:Label runat="server" Text="Number" ID="Label64">
</asp:Label>
</td>
<td style="width: 10%;">
<asp:Label runat="server" Text="Category" ID="Label65">
</asp:Label>
</td>
<td style="width: 20%;">
<asp:Label runat="server" Text="Description" ID="Label66">
</asp:Label>
</td>
<td style="width: 20%;">
<asp:Label runat="server" Text="Models" ID="Label67">
</asp:Label>
</td>
<td style="width: 5%;">
<asp:Label runat="server" Text="Price" ID="Label68">
</asp:Label>
</td>
<td style="width: 5%;">
<asp:Label runat="server" Text="A Qty" ID="Label69">
</asp:Label>
</td>
<td style="width: 5%;">
<asp:Label runat="server" Text="B Qty" ID="Label70">
</asp:Label>
</td>
<td style="width: 5%;">
<asp:Label runat="server" Text="Actual Qty" ID="Label71">
</asp:Label>
</td>
<td style="width: 5%;">
<asp:Label runat="server" Text="Total Qty" ID="Label72">
</asp:Label>
</td>
<td style="width: 5%;" >
</td>
</tr>
</table>
</td>
<td style="width: 8%;" >
</td>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr style="border-color: #1f4d30;"
>
<td style="width: 92%;">
<table border="0" cellspacing="0" class="PartsRepeater_InnerTable">
<tr class="PartsRepeater_InnerTable">
<td style="cursor: pointer; width: 10%;" class="PartsRepeater_InnerTable">
<asp:HiddenField runat="server" ID="PartID" Value='<%# Bind("PartID") %>' Visible="false" />
<asp:LinkButton runat="server" ID="Label52" Text='<%#Eval("Name").ToString()%>' CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 10%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="Label45" runat="server" Text='<%#Eval("Number").ToString().ToUpper()%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 20%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="Label46" runat="server" Text='<%#Eval("Category").ToString()%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 20%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="Label47" runat="server" Text='<%# GetPartDescr((String)Eval("Description"))%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 5%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="Label48" runat="server" Text=' <%# GetPartDescr((String)Eval("ModelName")) %>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 4%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="Label49" runat="server" Text='<%# GetPrice(Eval("Price").ToString(), Eval("sPrice").ToString(), Eval("Price3").ToString())%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 4%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="lblAQTY" runat="server" Text=' <%#Eval("AGradeQty").ToString()%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 4%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="lblBQty" runat="server" Text=' <%# int.Parse(Eval("QtyInStock").ToString()) - int.Parse(Eval("AGradeQty").ToString())%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 4%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="lblActualQTY" runat="server" Text=' <%#Eval("ActualQty").ToString()%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 4%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="Label60" runat="server" Text='<%#Eval("QtyInStock").ToString()%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
</tr>
<tr >
<td colspan="15" style="cursor: pointer; width: 5%;">
<asp:LinkButton ID="Label63" runat="server" Text='<%#Eval("priceModificationDate").ToString()%>'
Font-Size="Smaller" CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
</tr>
</table>
</td>
<td style="width: 8%">
<table>
<tr>
<td style="cursor: pointer; width: 50%;" class="PartsRepeater_InnerTable">
<asp:ImageButton ID="btnEdit" runat="server" ImageUrl="~/Images/edit.png" CausesValidation="False"
CommandName="editRow" CommandArgument='<%# Eval("PartID") %>' OnClientClick='SaveScrollPositions'>
</asp:ImageButton>
</td>
<td style="cursor: pointer; width: 50%;">
<asp:ImageButton ID="btnDelete" runat="server" OnClientClick='<%# GetConfirmMessage(Eval("Name"))%>'
ImageUrl="~/Images/delete.png" CausesValidation="False" CommandName="Delete"
CommandArgument='<%# Eval("PartID") %>'></asp:ImageButton>
</td>
</tr>
</table>
</td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
everyone!
I'm writing repeater control on my web-page. After I added data paging for repeater I have got problem:
ImageButton does'nt fire any more OnItemCommand event of repeater. Why?
Here, is part of markup code:
<asp:Repeater ID="PartsRepeater" runat="server"
OnItemCommand="partsRepeater_ItemCommand"
OnItemDataBound="partsRepeaterItem_Bound">
<HeaderTemplate>
<table rules="all" cellspacing="0" style="border-color: rgb(31, 77, 48);
border-style: solid; width: 100%; border-collapse: collapse;">
<tr >
<td style="width: 92%;">
<table cellspacing="0" border="0" style="border-color: rgb(31, 77, 48); border-style: solid;
width: 100%; border-collapse: collapse;">
<tr style="background-color: #1f4d30; color: white;">
<td style="width: 10%;">
<asp:Label runat="server" Text="Name" ID="lblName">
</asp:Label>
</td>
<td style="width: 10%;">
<asp:Label runat="server" Text="Number" ID="Label64">
</asp:Label>
</td>
<td style="width: 10%;">
<asp:Label runat="server" Text="Category" ID="Label65">
</asp:Label>
</td>
<td style="width: 20%;">
<asp:Label runat="server" Text="Description" ID="Label66">
</asp:Label>
</td>
<td style="width: 20%;">
<asp:Label runat="server" Text="Models" ID="Label67">
</asp:Label>
</td>
<td style="width: 5%;">
<asp:Label runat="server" Text="Price" ID="Label68">
</asp:Label>
</td>
<td style="width: 5%;">
<asp:Label runat="server" Text="A Qty" ID="Label69">
</asp:Label>
</td>
<td style="width: 5%;">
<asp:Label runat="server" Text="B Qty" ID="Label70">
</asp:Label>
</td>
<td style="width: 5%;">
<asp:Label runat="server" Text="Actual Qty" ID="Label71">
</asp:Label>
</td>
<td style="width: 5%;">
<asp:Label runat="server" Text="Total Qty" ID="Label72">
</asp:Label>
</td>
<td style="width: 5%;" >
</td>
</tr>
</table>
</td>
<td style="width: 8%;" >
</td>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr style="border-color: #1f4d30;"
>
<td style="width: 92%;">
<table border="0" cellspacing="0" class="PartsRepeater_InnerTable">
<tr class="PartsRepeater_InnerTable">
<td style="cursor: pointer; width: 10%;" class="PartsRepeater_InnerTable">
<asp:HiddenField runat="server" ID="PartID" Value='<%# Bind("PartID") %>' Visible="false" />
<asp:LinkButton runat="server" ID="Label52" Text='<%#Eval("Name").ToString()%>' CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 10%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="Label45" runat="server" Text='<%#Eval("Number").ToString().ToUpper()%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 20%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="Label46" runat="server" Text='<%#Eval("Category").ToString()%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 20%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="Label47" runat="server" Text='<%# GetPartDescr((String)Eval("Description"))%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 5%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="Label48" runat="server" Text=' <%# GetPartDescr((String)Eval("ModelName")) %>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 4%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="Label49" runat="server" Text='<%# GetPrice(Eval("Price").ToString(), Eval("sPrice").ToString(), Eval("Price3").ToString())%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 4%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="lblAQTY" runat="server" Text=' <%#Eval("AGradeQty").ToString()%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 4%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="lblBQty" runat="server" Text=' <%# int.Parse(Eval("QtyInStock").ToString()) - int.Parse(Eval("AGradeQty").ToString())%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 4%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="lblActualQTY" runat="server" Text=' <%#Eval("ActualQty").ToString()%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
<td style="cursor: pointer; width: 4%;" class="PartsRepeater_InnerTable">
<asp:LinkButton ID="Label60" runat="server" Text='<%#Eval("QtyInStock").ToString()%>'
CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
</tr>
<tr >
<td colspan="15" style="cursor: pointer; width: 5%;">
<asp:LinkButton ID="Label63" runat="server" Text='<%#Eval("priceModificationDate").ToString()%>'
Font-Size="Smaller" CommandArgument='<%# Eval("PartID") %>'>
</asp:LinkButton>
</td>
</tr>
</table>
</td>
<td style="width: 8%">
<table>
<tr>
<td style="cursor: pointer; width: 50%;" class="PartsRepeater_InnerTable">
<asp:ImageButton ID="btnEdit" runat="server" ImageUrl="~/Images/edit.png" CausesValidation="False"
CommandName="editRow" CommandArgument='<%# Eval("PartID") %>' OnClientClick='SaveScrollPositions'>
</asp:ImageButton>
</td>
<td style="cursor: pointer; width: 50%;">
<asp:ImageButton ID="btnDelete" runat="server" OnClientClick='<%# GetConfirmMessage(Eval("Name"))%>'
ImageUrl="~/Images/delete.png" CausesValidation="False" CommandName="Delete"
CommandArgument='<%# Eval("PartID") %>'></asp:ImageButton>
</td>
</tr>
</table>
</td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
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评论（3）
我尝试了多种方法来解决这个问题并解决了：
我只是将 ImageButton 替换为 linkButton 和图像：
部分代码：
有关更多信息，请参阅： http://weblogs.asp.net/justinsaraceno/archive/2008/11/05/linkbutton-with-image-and-text.aspx
I've tried nany ways to solve this problem and solved it so:
I just replace ImageButton with linkButton with image:
Part og code:
For more see: http://weblogs.asp.net/justinsaraceno/archive/2008/11/05/linkbutton-with-image-and-text.aspx
抱歉，我没有更具体的答案，但它与转发器上的 ViewState 以及在回发时重新绑定转发器有关。
显然，当发生回发并且您重新绑定中继器时，它会丢失一些事件绑定，并且不会运行 OnCommand，而是将其视为 ImageButton 的首页加载。 AFAIK 它只发生在 ImageButton 上，而不发生在 LinkButton 或 Button 上。
Sorry I don't have a more specific answer, but it has something to do with ViewState on the repeater and rebinding the repeater on Postback.
Apparently, when the postback occurs and you rebind the repeater, it loses some event binding and instead of running the OnCommand, it treats it as if it's a first page load for ImageButton. AFAIK it only happens on ImageButton and not LinkButton or Button.
将其放在后面的代码中肯定会起作用
Put this in code behind it will surely work