asp.net – 将AJAX ModalPopupExtender定位在屏幕问题的中心

当设置了PopupDragHandleControlID属性(没有这个属性它可以正常工作)时,ModalPopupExtender定位在屏幕中心的问题.

ModalPopupExtender没有位于屏幕中央.
我认为导致问题的原因是页面的CSS布局导致当我禁用它,弹出窗口位于屏幕的中心(我不明白为什么页面的CSS影响ModalPopupExtender只有当它的PopupDragHandleControlID属性被设置)

这一页：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Untitled Page</title>
    <link href="layout.css" rel="stylesheet" type="text/css" />
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <div id="header">
    </div>

     <div id="container">
       <div id="center" class="column">                    

          <div id="centercolcontent" class="centercolcontent">    
            <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>


        <asp:UpdatePanel ID="UpdatePanel1" runat="server" >
            <ContentTemplate>
                <asp:Button ID="btnShowPopup" runat="server" Text="Open" />   
                <asp:Panel ID="pnlUploader" runat="server" CssClass="pnlUploader"   style="display: none;">
                    <cc1:ModalPopupExtender ID="mdlPopup1" runat="server" TargetControlID="btnShowPopup"
                                PopupControlID="pnlUploader" CancelControlID="btnCancel"
                                BackgroundCssClass="modalBackground"
                                PopupDragHandleControlID="pnlUploader" RepositionMode="RepositionOnWindowResize"   />
                    <div id="pnlDragMe" class="pnlDragMe">
                        Image Uploader
                     </div>     

                     <div class="upload" id="upload">             
                         <div id="status" class="info">
                           Please select a file to upload
                         </div>
                        <div class="commands">      
                         <asp:Button ID="btnUpload" runat="server"  Text="Upload" 
                             OnClientClick="javascript:onUploadClick()" />
                         <asp:Button ID="btnCancel" runat="server" Text="Cancel" />
                      </div>        
                   </div>                                      
                </asp:Panel>    

            </ContentTemplate>   
         </asp:UpdatePanel>
          </div>

       </div>

      </div>               
      <div id="left" class="column">
      </div>

      <div id="right" class="column">                        
      </div>          

    <div id="footer">

    </div>




    </div>
    </form>
</body>

</html>

CSS：

body
{
    min-width: 630px; 
}

#container
{
    padding-left: 200px; 
    padding-right: 150px; 
}

#container .column
{
    position: relative;
    float: left;
}

#center
{
    padding: 0px 0px; 
    width: 100%;
}

#left
{
    width: 200px; 
    padding: 0 0px 0 0; 
    right: 200px;
    margin-left: -100%;
}

#right
{
    width: 130px;
    padding: 0 10px; 
    margin-right: -100%;
}

#footer
{
    clear: both;
}


* html #left
{
    left: 150px; /* RC fullwidth */
}

/*** Equal-height Columns ***/

#container
{
    overflow: hidden;
}

#container .column
{
    padding-bottom: 1001em; /* X + padding-bottom */
    margin-bottom: -1000em; /* X */
}



* html body
{
    overflow: hidden;
}

* html #footer-wrapper
{
    float: left;
    position: relative;
    width: 100%;
    padding-bottom: 10010px;
    margin-bottom: -10000px;
    background: #FFF; /*** Same as body background ***/
}



body
{
    margin: 0;
    padding: 0;
}

#header,#footer
{
    font-size: large;
    text-align: center;
    padding: 0.3em 0;
}

#left
{
    /*background: #66F;*/
}

#center
{
    background: #DDD;
}



.modalBackground
{
    background-color: Gray;
    filter: alpha(opacity=70);
    opacity: 0.7;
}

解决方法

模态弹出式面板获得绝对位置.所以它需要在一个具有非静态位置的元素中.在这种情况下,我希望它以页面为中心,所以我把它放在一个元素(在这种情况下是UpdatePanel,但它不关心什么样的元素),它具有内联样式的位置：fixed ;左：0;顶部：0.

<asp:UpdatePanel ID="updProductPopup" runat="server" style="position:fixed;left:0;top:0;">
<contenttemplate>

    <act:ModalPopupExtender ID="mpeProduct" runat="server" BackgroundCssClass="modalPopupBackground" BehaviorID="behaviourModalPopup" OkControlID="btnMpClose" PopupControlID="pnlModalPopup" PopupDragHandleControlID="pnlMpHandle" TargetControlID="btnMpHidden">
    </act:ModalPopupExtender>

    <!-- pnlModalPopup MUST have inline style display:none -->
    <asp:Panel ID="pnlModalPopup" runat="server" CssClass="modalPopup" style="display:none;">
        <asp:Panel runat="server" ID="pnlMpHandle" CssClass="modalPopupDragHandle">
            Panel Header
        </asp:Panel>
        <asp:Panel runat="server" ID="pnlMpContent">Here's my content</asp:Panel>
        <p class="modalPopupClose">
            <a id="btnMpClose" href="#" class="custom-button">Close</a>
        </p>
    </asp:Panel>
    <asp:Button ID="btnMpHidden" runat="server" Text="Button" CssClass="modalPopupHiddenButton" />

</contenttemplate>

我知道原来的问题是相当老的,但是我花了很多时间寻找这个问题的答案,没有找到它,这个问题在Google上相当高,所以希望这会节省别人一段时间.

asp.net – 将AJAX ModalPopupExtender定位在屏幕问题的中心

解决方法

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