AjaxFileUpload假回传 [英] AjaxFileUpload postback false

问题描述

我使用 AjaxFileUpload 在 ASP.NET 4.0 网​​站。问题是，当我上传文件的 UploadComplete 火灾导致回发到页面。每回发按 AjaxFileUpload 引起的IsPostBack 属性是假这应该是真。是什么原因。我在的UpdatePanel 没有它检查它。它没有它的影响。这里是

 ＆LT; AJAX：AjaxFileUpload ID =AjaxFileUpload1ContextKeys =弗雷德
     AllowedFileTypes =JPG，JPEG，PNG，GIFMaximumNumberOfFiles =3=服务器
        OnUploadComplete =AjaxFileUpload1_UploadComplete/＆GT;
 

解决方案

要在AjaxFileUpload检测回发使用该控件的属性： AjaxFileUpload.IsInFileUploadPostBack 。在的IsPostBack 属性不会有效，因为这种控制没有提交到已被呈现在同一页面，而是隐框代替它的第一次帧它装在服务器上。查看更多在AjaxControlToolkit来源：<一个href=\"http://ajaxcontroltoolkit.$c$cplex.com/SourceControl/changeset/view/a2a6dc6854e0#SampleWebSites/AjaxControlToolkitSampleSite/AjaxFileUpload/AjaxFileUpload.aspx.cs\">AjaxControlToolkit AjaxFileUpload

i am using AjaxFileUpload in ASP.NET 4.0 website. The problem is that when i upload a file its UploadComplete fires which causes a postback to page. on every postback caused by AjaxFileUpload the Ispostback property is False which should be True. What is the reason. I checked it in the updatePanel and without it. It has no affect at it. Here is the

  <ajax:AjaxFileUpload ID="AjaxFileUpload1" ContextKeys="fred" 
     AllowedFileTypes="jpg,jpeg,png,gif" MaximumNumberOfFiles="3" runat="server" 
        OnUploadComplete="AjaxFileUpload1_UploadComplete" />

解决方案

To detect postback from the AjaxFileUpload use this control's property: AjaxFileUpload.IsInFileUploadPostBack. The IsPostBack property doesn't works because this control submits not to the same page where is was rendered but to hidden frame instead so it's the first time for frame it loading on server. See more in AjaxControlToolkit sources: AjaxControlToolkit AjaxFileUpload

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