No more posts after uploading file to sharepoint

Question

I tried to download the file from sharepoint. But after downloading this file, I can’t click on other buttons. What is wrong with my coding?

This is my first way.

Response.AppendHeader("content-disposition", "attachment; filename= " + fileName); Response.ContentType = "text/plain"; Response.WriteFile(Server.MapPath("~/" + fileName)); Response.End(); 

This is my second way.

  byte[] bytes = System.IO.File.ReadAllBytes("D:\\" + fileName); Response.ClearContent(); Response.ClearHeaders(); Response.AddHeader("Content-Type", "application/octet-stream"); Response.AddHeader("Content-Length", bytes.Length.ToString()); Response.AddHeader("content-disposition", "attachment; filename= " + fileName); Response.BinaryWrite(bytes); Response.Flush(); Response.End(); 

I even comment on Response.End (), but still the same result.

Is there any other way I should have tried?

Any help would be really appreciated. In fact, I posted this question a few days ago, but only one gave me a second way to try, but it still doesn't work.

Thanks.

UPDATE

Here is my GridView under GridView.

  <asp:GridView ID="gvGiro" Width="100%" runat="server" GridLines="Both" AllowPaging="false" CssClass="form-table" ShowHeader="false" AllowSorting="false" AutoGenerateColumns="false" OnRowDataBound="gvGiro_RowDataBound"> <Columns> <asp:TemplateField ItemStyle-Width="20%" ItemStyle-HorizontalAlign="Center"> <ItemTemplate> <asp:Label ID="lblValueDate" Text='<%# getDate(Eval("ValueDate")) %>' runat="server" /> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <ItemTemplate> <asp:GridView ID="gvDetail" runat="server" AllowPaging="false" AllowSorting="false" CssClass="list-table border" HeaderStyle-CssClass="header" AutoGenerateColumns="false"> <Columns> <asp:TemplateField HeaderText="Sequence Number" ItemStyle-HorizontalAlign="Left" ItemStyle-Width="30%" > <ItemTemplate> <%#((DataRowView)Container.DataItem)["MessageSeqNbr"] %> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Total Number of Debit Transaction" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Center"> <ItemTemplate> <%#((DataRowView)Container.DataItem)["TotalDebitNbr"] %> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Status" ItemStyle-HorizontalAlign="Left" ItemStyle-Width="25%" HeaderStyle-HorizontalAlign="Center"> <ItemTemplate> <%#((DataRowView)Container.DataItem)["CodeDesc"] %> <asp:HiddenField ID="hidCode" runat="server" Value='<%#((DataRowView)Container.DataItem)["Code"] %>' /> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Action" ItemStyle-HorizontalAlign="Center" ItemStyle-Width="10%" HeaderStyle-HorizontalAlign="Center"> <ItemTemplate> <asp:Button ID="btnDownload" runat="server" CssClass="button submit" Text="Download" CommandName="download" OnCommand="onCmd" CommandArgument='<%#Eval("Id") %>' Width="80px"/> <asp:Button ID="btnUnbatch" runat="server" CssClass="button generic" Text="Un-Batch" CommandName="unbatch" OnCommand="onCmd" CommandArgument='<%#Eval("Id") %>' Width="80px"/> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView> 

Here is my cs file

  protected void gvGiro_RowDataBound(object sender, GridViewRowEventArgs e) { GridView gr; if (e.Row.RowType == DataControlRowType.DataRow) { gr = (GridView) e.Row.FindControl("gvDetail"); using (class2 ct2= new Class2()) { Label lblValueDate = (Label)e.Row.FindControl("lblValueDate"); DateTime dt= DateTime.MinValue; DataSet ds= ct2.GetData(dt); gr.DataSource = ds; gr.DataBind(); } } } protected void onCmd(object sender, CommandEventArgs e) { string id; switch (e.CommandName) { case "unbatch": id= e.CommandArgument.ToString(); Unbatch(id); break; case"download": id= e.CommandArgument.ToString(); Download(id); break; default: break; } } protected void Download(string id) { // to do - substitute all hard-code guid Guid batchId = new Guid(id); string fileName = ""; Class1 ct = new Class1(); { if (!ct.FileExists(batchId , ref fileName)) { byte[] bytes = System.IO.File.ReadAllBytes("D:\\" + fileName); Response.ClearContent(); Response.ClearHeaders(); Response.AddHeader("Content-Type", "application/octet-stream"); Response.AddHeader("Content-Length", bytes.Length.ToString()); Response.AddHeader("content-disposition", "attachment; filename= " + fileName); Response.BinaryWrite(bytes); Response.Flush(); Response.End(); } 

Answer 1

SharePoint registers the "on submit" JavaScript handler. In this handler, the global variable _spFormOnSubmitCalled set to true . SharePoint uses this variable to check if a file has been sent and prevents further submissions. Since your “postback download” does not refresh the page, this variable remains true . So that all other buttons stop working.

As a workaround, you can set this variable to false in the client click handler on the download button:

 Button btn = new Button(); btn.Text = "Download"; btn.Click += DownloadButton_Click; // set the client click handler btn.OnClientClick = "window.setTimeout(function() { _spFormOnSubmitCalled = false; }, 10);" 

Of course, this is a bit hacked and not guaranteed to work in future versions of SharePoint.

Answer 2

There is an easy way around this. Log the OnClientClick event to click the button and set the _spFormOnSubmitCalled parameter to false.

 <asp:Button ID="Button1" runat="server" Text="Export" onclick="Button1_Click" OnClientClick="javascript:setFormSubmitToFalse()" /> 

And put the script below in the page / js file.

 <script type="text/javascript"> function setFormSubmitToFalse() { _spFormOnSubmitCalled = false; return true; } </script> 

Answer 3

I have not been successful using '_spFormOnSubmitCalled'. I had success by putting this in my Page_Load function.

 string js = @"_spSuppressFormOnSubmitWrapper = true;"; this.Page.ClientScript.RegisterStartupScript(this.GetType(), "js", js, true); 

Ajax second postback does not work in Sharepoint in UpdatePanel Provides some background information on why this is necessary.

Answer 4

there is an even easier solution to all of this. Instead of the download button, just use

<a>

I usually use something like:

 <a href='<%# String.Format("{0}",BuildUrl(Eval("Title")))%>' title='<%#Eval("Title") %>'>Download</a> 

Answer 5

I am using SharePoint 2010 and DexExpress and inside my visual web page that I needed to add is part of clientSideEvents. below is my code ...

 <dx:ASPxButton runat="server" ID="btnExportGrid" Text="Export Data" AutoPostBack="False" OnClick="btnExportGrid_Click" Theme="Office2010Blue" Width="140px" CausesValidation="False" > <ClientSideEvents Click="function(s, e) {_spFormOnSubmitCalled=false;_spSuppressFormOnSubmitWrapper=true; }" /> </dx:ASPxButton> 

and my c # code

 protected void btnExportGrid_Click(object sender, EventArgs e) { gridExporter.WriteXlsToResponse(); } 

Hope this helps.

Answer 6

If you guys have not seen using-asp-net-ajax-with-sharepoint-moss-2007 , but this perfectly explains the problem. However, there are better solutions. Thanks to @SSK, it was the right pointer in the right direction, which I could not have done without it.

But in SP2013 at least there is a function to reset _spFormOnSubmitCalled to false, so there is no need to write your own.

 <asp:LinkButton ID="LinkButton1" runat="server" OnClientClick="javascript:_spResetFormOnSubmitCalledFlag()"></asp:LinkButton>