AJAX的UpdatePanel給錯誤

我想使用AJAX的UpdateProgress顯示加載圖像在創建壓縮文件時，卻得到了以下錯誤：AJAX的UpdatePanel給錯誤

微軟JScript運行時錯誤：Sys.WebForms.PageRequestManagerParserErrorException：消息從服務器收到的無法解析。此錯誤的常見原因是，通過調用Response.Write（），響應篩選器，HttpModules或服務器跟蹤已啓用來修改響應時。 Detals：錯誤解析'PK'附近。

下面是我的.aspx頁面中

<html xmlns="http://www.w3.org/1999/xhtml"> 
<head runat="server"> 
    <title></title> 
    <style type="text/css"> 
     #progressBackgroundFilter 
     { 
      position: fixed; 
      top: 0px; 
      bottom: 0px; 
      left: 0px; 
      right: 0px; 
      overflow: hidden; 
      padding: 0; 
      margin: 0; 
      background-color: #000; 
      filter: alpha(opacity=50); 
      opacity: 0.5; 
      z-index: 1000; 
     } 

     #processMessage 
     { 
      position: fixed; 
      top: 30%; 
      left: 43%; 
      padding: 10px; 
      width: 14%; 
      z-index: 1001; 
      background-color: #fff; 
      border: solid 1px #000; 
     } 
    </style> 
</head> 
<body> 
    <form id="form1" runat="server"> 
    <div> 
     <asp:ScriptManager ID="ScriptManager1" runat="server"> 
     </asp:ScriptManager> 
     <asp:UpdatePanel ID="UpdatePanel1" runat="server"> 
      <ContentTemplate> 
       <asp:CheckBox ID="chb_pass" runat="server" Text="Do you want the zip file to have a password?" 
        AutoPostBack="True" /> 
       <br /> 
       <asp:TextBox ID="txt_password" runat="server" MaxLength="20" Visible="false" Style="margin-top: 6px" 
        Width="152px"></asp:TextBox> 
       <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txt_password" 
        ErrorMessage="* Need Password!"></asp:RequiredFieldValidator> 
       <br /> 
     <asp:Button ID="btnDownloadPhotos" runat="server" Text="Download Album Photos" Height="27px" 
        Style="margin-top: 3px" Width="284px" /> 


      </ContentTemplate> 
      <Triggers> 
       <asp:AsyncPostBackTrigger ControlID="btnDownloadPhotos" EventName="Click" /> 
      </Triggers> 
     </asp:UpdatePanel> 
     <asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1"> 
      <ProgressTemplate> 
       <div id="progressBackgroundFilter"> 
       </div> 
       <div id="processMessage"> 
        Preparing download...<br /> 
        <br /> 
        <img alt="Loading" src="img/ajax-loader.gif" /> 
        </div> 
      </ProgressTemplate> 
     </asp:UpdateProgress> 
     </div> 
    </form> 
</body> 
</html>

代碼...以下是對aspx.vb頁面的代碼

Imports System.IO 
Imports System.Text 
Imports Ionic.Zip 

Partial Class download 
    Inherits System.Web.UI.Page 

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnDownloadPhotos.Click 

     Dim PhotoFileList As New List(Of String) 
     Dim uploadDirectory As String = Server.MapPath("") & "\uploads\" 
     Dim albumName As String = "cricket" 

     PhotoFileList.Add(uploadDirectory & "CIMG1455.JPG") 
     PhotoFileList.Add(uploadDirectory & "CIMG1453.JPG") 
     PhotoFileList.Add(uploadDirectory & "CIMG1451.JPG") 
     PhotoFileList.Add(uploadDirectory & "CIMG1450.JPG") 

     createZip(PhotoFileList, albumName) 

    End Sub 

    Private Sub createZip(ByVal listOfFilename As List(Of String), ByVal albumName As String) 

     ' Tell the browser we're sending a ZIP file! 
     Dim downloadFileName As String = String.Format(albumName & "-{0}.zip", DateTime.Now.ToString("yyyy-MM-dd-HH_mm_ss")) 
     Response.ContentType = "application/zip" 
     Response.AddHeader("Content-Disposition", "filename=" & downloadFileName) 

     ' Zip the contents of the selected files 
     Using zip As New ZipFile() 
      'Add the password protection, if specified 
      If chb_pass.Checked = True Then 
       zip.Password = txt_password.Text 

       'This encryption is weak! Please see http://cheeso.members.winisp.net/DotNetZipHelp/html/24077057-63cb-ac7e-6be5-697fe9ce37d6.htm for more details 
       zip.Encryption = EncryptionAlgorithm.PkzipWeak 
      End If 

      ' Construct the contents of the README.txt file that will be included in this ZIP 
      Dim readMeMessage As String = String.Format("This ZIP file {0} contains the following photos within the " & albumName & " album:{1}{1}", downloadFileName, Environment.NewLine) 

      ' Add the checked files to the ZIP 
      For Each li As String In listOfFilename.ToArray() 
       ' Record the file that was included in readMeMessage 
       readMeMessage &= String.Concat(vbTab, "* ", li.ToString, Environment.NewLine) 

       ' Now add the file to the ZIP (use a value of "" as the second parameter to put the files in the "root" folder) 
       zip.AddFile(li.ToString, "Your Files") 

      Next 

      ' Add the README.txt file to the ZIP 
      zip.AddEntry("README.txt", readMeMessage, Encoding.ASCII) 

      ' Send the contents of the ZIP back to the output stream 
      zip.Save(Response.OutputStream) 
     End Using 
    End Sub 

    Protected Sub chb_pass_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles chb_pass.CheckedChanged 
     If chb_pass.Checked = True Then 
      txt_password.Visible = True 
     ElseIf chb_pass.Checked = False Then 
      txt_password.Visible = False 
     End If 
    End Sub 
End Class

任何想法如何，我可以解決這個問題？任何幫助將不勝感激。

感謝

來源

2011-02-09 AJsStack

還有一件事我與下載在UpdatePanel外測試，它沒」沒有任何分歧。 – AJsStack 2011-02-09 21:13:12

你可以通過它來看看它的代碼是否拋出，或者當它解析響應時拋出它的ms ajax？ – asawyer 2011-02-09 21:19:19

我在過去也有類似的問題，試圖用一個更新面板內的按鈕來觀看excel文件。這是我的解決方案，希望它有幫助。

VB.NET：

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load 

    Dim sm = ScriptManager.GetCurrent(Me.Page) 
    sm.RegisterPostBackControl(Me.YOUR_BUTTON) 

    AddPostBackTrigger(Me.YOUR_BUTTON.UniqueID.ToString()) 

End Sub 


Public Sub AddPostBackTrigger(ByVal ControlId As String) 
    Dim existingTrigger = FindPostBackTrigger(ControlId) 
    If existingTrigger Is Nothing Then 
     Dim trigger As New PostBackTrigger() 
     trigger.ControlID = ControlId 
     Me.YOUR_UPDATE_PANEL_GOES_HERE.Triggers.Add(trigger) 
    End If 
End Sub 
Public Sub RemovePostBackTrigger(ByVal ControlId As String) 
    Dim existingTrigger = FindPostBackTrigger(ControlId) 
    If existingTrigger IsNot Nothing Then 
     Me.YOUR_UPDATE_PANEL_GOES_HERE.Triggers.Remove(existingTrigger) 
    End If 
End Sub 
Private Function FindPostBackTrigger(ByVal ControlId As String) As PostBackTrigger 
    For Each Trigger In Me.YOUR_UPDATE_PANEL_GOES_HERE.Triggers 
     If Trigger.GetType().Name = "PostBackTrigger" Then 
      Dim pt = CType(Trigger, PostBackTrigger) 
      If pt.ControlID = ControlId Then 
       Return pt 
      End If 
     End If 
    Next 
    Return Nothing 
End Function

C＃：

protected void Page_Load(object sender, EventArgs e) 
{ 
    ScriptManager sm = ScriptManager.GetCurrent(Page); 
    if (sm != null) sm.RegisterPostBackControl(YOUR_CONTROL); 
    AddPostBackTrigger(YOUR_CONTROL.UniqueID); 
} 

private void AddPostBackTrigger(string controlId) 
{ 
    PostBackTrigger existingTrigger = FindPostBackTrigger(controlId); 

    if (existingTrigger != null) 
    { 
     var trigger = new PostBackTrigger {ControlID = controlId}; 
     YOUR_UPDATE_PANEL.Triggers.Add(trigger); 
    } 
} 

private PostBackTrigger FindPostBackTrigger(string controlId) 
{ 
    return 
     YOUR_UPDATE_PANEL 
      .Triggers.OfType<PostBackTrigger>() 
      .FirstOrDefault(pt => pt.ControlID == controlId); 
}

來源

2011-02-09 21:14:38 asawyer

有由Eilon立頓一個優秀的博客條目。它含有大量的技巧就如何避免這個錯誤：

Sys.WebForms.PageRequestManagerParserErrorException - what it is and how to avoid it

閱讀評論了。有人提出了同樣問題的評論：「我解決了它改變了我的應用程序池在IIS上的服務器空閒時間，它只有5個，所以我增加了它，現在起作用。」

可能在回發時發生錯誤。在這種情況下，你可以通過添加PostBackTrigger到您的UpdatePanel和引用這會導致問題的按鈕來查看有關該錯誤的詳細信息：

<asp:updatepanel ID="updatepanel1" runat="server"> 
    <Triggers> 
     <asp:PostBackTrigger ControlID="button1" /> 
    </Triggers> 
    <ContentTemplate></ContentTemplate> 
</asp:updatepanel>

來源

2012-07-06 19:32:12 user1507675

AJAX的UpdatePanel給錯誤

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