本文介绍了Modalpopupextender.show（）没有开火的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
HI，
我正在研究asp：ModalPopupExtender。
单击图像按钮时弹出窗口应该打开。
但是弹出窗口没有打开。
我尝试过：
< asp：UpdatePanel ID =UpdatePanel3runat =server>
< ContentTemplate>
<％ - < asp：DropDownList ID =ddlemdtyperunat =serverStyle =margin-left：29px; width：188px;
class =inputddlAutoPostBack =trueOnSelectedIndexChanged =ddlemdtype_SelectedIndexChanged
TabIndex =17>
< / asp：DropDownList> - ％>
< span class =mandatoryfieldstyle =margin：5px 0 0 0; position：absolute;> *< / span>
<％ - < asp：ImageButton ID =ImageButtonEMDTypeImageUrl =〜/ images / add.pngrunat =server
Style =margin：7px 0 0 8px; position ：绝对的; AlternateText =Add NewOnClick =imgbtnaddnew_Click/> - ％>
< div>
< asp：LinkButton ID =LinkButton3ImageUrl =〜/ images / cross.pngrunat =serverStyle =display：none>
< / asp：LinkButton>
< asp：ModalPopupExtender ID =mdlsamplerunat =serverTargetControlID =LinkButton3
PopupControlID =_ pnlEmdType>
< / asp：ModalPopupExtender>
< asp：Panel ID =_ pnlEmdTyperunat =serverScrollBars =AutoStyle =margin-right：-10px;
display：none;>
< div id =DivLeadTypestyle =float：right;>
< asp：ImageButton ID =ImageButton2runat =serverImageAlign =RightImageUrl =〜/ images / popup_close_button.png
Width =28pxHeight =28px/ >
< br />
< div style =background-color：#CCCCCC; margin-right：12px; border：solid 6px #ffffff;>
< div style =background-color：#CCCCCC; border：solid 4px #ffffff;>
< table border =0width =350align =centercellpadding =0cellspacing =0>
< tr>
< td class =popuptitlealign =center>
< asp：Label ID =lblpopmastertitlerunat =serverText =EMD Type>< / asp：Label>
< / td>
< / tr>
< tr>
< td align =centerclass =popupcontent>
< table>
< tr>
< td>
< asp：Label ID =lblpopupRownamerunat =serverText =EMD Type>< / asp：Label>
< / td>
< td>
< asp：TextBox ID =txtpopEmdTyperunat =serverclass =inputMaxLength =500>< / asp：TextBox>
< span class =mandatoryfield> *< / span>
< / td>
< / tr>
< / table>
< / td>
< / tr>
< tr>
< td class =popupfootercolspan =2>
< asp：Button ID =btnpopupSaverunat =serverText =SaveOnClick =btnpopupSave_OnClick
TabIndex =35OnClientClick =return CheckValidation（）; />
< asp：Button ID =btnpopupAppCloserunat =serverText =CancelTabIndex =35/>
< / td>
< / tr>
< / table>
< / div>
< / div>
< / div>
< / asp：Panel>
< / div>
< / ContentTemplate>
<触发器>
< asp：PostBackTrigger ControlID =ddlLeadStatus/>
< /触发器>
< / asp：UpdatePanel>
解决方案
HI,
I am working on asp:ModalPopupExtender.
on clicking an image button a pop-up should open.
But pop-up is not opening.
What I have tried:
<asp:UpdatePanel ID="UpdatePanel3" runat="server">
<ContentTemplate>
<%-- <asp:DropDownList ID="ddlemdtype" runat="server" Style="margin-left: 29px; width: 188px;"
class="inputddl" AutoPostBack="true" OnSelectedIndexChanged="ddlemdtype_SelectedIndexChanged"
TabIndex="17">
</asp:DropDownList>--%>
<span class="mandatoryfield" style="margin: 5px 0 0 0; position: absolute;">*</span>
<%--<asp:ImageButton ID="ImageButtonEMDType" ImageUrl="~/images/add.png" runat="server"
Style="margin: 7px 0 0 8px; position: absolute;" AlternateText="Add New" OnClick="imgbtnaddnew_Click" />--%>
<div>
<asp:LinkButton ID="LinkButton3" ImageUrl="~/images/cross.png" runat="server" Style="display: none">
</asp:LinkButton>
<asp:ModalPopupExtender ID="mdlsample" runat="server" TargetControlID="LinkButton3"
PopupControlID="_pnlEmdType">
</asp:ModalPopupExtender>
<asp:Panel ID="_pnlEmdType" runat="server" ScrollBars="Auto" Style="margin-right: -10px;
display: none;">
<div id="DivLeadType" style="float: right;">
<asp:ImageButton ID="ImageButton2" runat="server" ImageAlign="Right" ImageUrl="~/images/popup_close_button.png"
Width="28px" Height="28px" />
<br />
<div style="background-color: #CCCCCC; margin-right: 12px; border: solid 6px #ffffff;">
<div style="background-color: #CCCCCC; border: solid 4px #ffffff;">
<table border="0" width="350" align="center" cellpadding="0" cellspacing="0">
<tr>
<td class="popuptitle" align="center">
<asp:Label ID="lblpopmastertitle" runat="server" Text="EMD Type"></asp:Label>
</td>
</tr>
<tr>
<td align="center" class="popupcontent">
<table>
<tr>
<td>
<asp:Label ID="lblpopupRowname" runat="server" Text="EMD Type"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtpopEmdType" runat="server" class="input" MaxLength="500"></asp:TextBox>
<span class="mandatoryfield">*</span>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td class="popupfooter" colspan="2">
<asp:Button ID="btnpopupSave" runat="server" Text="Save" OnClick="btnpopupSave_OnClick"
TabIndex="35" OnClientClick="return CheckValidation();" />
<asp:Button ID="btnpopupAppClose" runat="server" Text="Cancel" TabIndex="35" />
</td>
</tr>
</table>
</div>
</div>
</div>
</asp:Panel>
</div>
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="ddlLeadStatus" />
</Triggers>
</asp:UpdatePanel> 解决方案
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