AJAX :: FileUpload Control With Validation Not Work After Enclosing With UpdatePanel?

Nov 23, 2010

I have a FileUpload Control on the page with validation and it is working smoothly.

Later there is an important demand to have it partially updated so we enclose it with UpdatePanel.

Then problem comes up when user browse file and press upload button, no file is uploaded.

Is it we cannot do partial rendering with FileUploader ?

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Similar Messages:

Web Forms :: FileUpload Control Does Not Work When Placed Inside UpdatePanel

Jul 24, 2012

Following is my html design 

<asp:UpdatePanel ID="up1" runat="server"><ContentTemplate>
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="upload" />
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>   </ContentTemplate></asp:UpdatePanel>

and 

if (FileUpload1.PostedFile !=null) {
//my upload code here....
}

without update panel it works fine.after place all control inside update its not working. How to fix this...

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AJAX :: FileUpload Controls Does Not Work Inside An Updatepanel

Feb 26, 2010

I use a tabcontrol with 2 tabs. In the second tabpanel as seen in the code I use a Fileuploadcontrol to upload Images from a users computer.

The problem is that I need to surround the tabcontrol with an updatepanel as I dont want a fullpage postback when switching between these 2 tabpanels. In this code I have the tabcontrol inside an updatepanel but the problem is that the Fileupload controls does not seem to work inside an updatepanel.

How will I solve this problem as I dont want a fullpage postback when switching between the tabs ?

[Code]....

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AJAX :: Fileupload In Updatepanel With Timer Doesn't Work At The Second Time

Jan 23, 2011

I cannot use asyncFileUpload as it has too many restrictions which doesn't meet our requirement.

I'm able to add a updatepanel trigger to force the Button1 to perform a postback. after the file uploaded, I need to use a timer to do different tasks and return messages back to client with the timer. That is all fine.

However, when one upload is finished. I try to do it again. The FileUpload1.HasFile is "false". I don't know why. if I remove the timer, at the second time, the HasFile is "true". I think there must be something in the timer and disable the Button1's postback.

page:

[Code]....

Code:

[Code]....

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AJAX :: FileUpload Control Not Working In UpdatePanel?

Sep 21, 2010

I want to uplaod my images into the database.it works fine if my images are inserted into the database on postback,but when i put my FileUpload control in UpdatePanel the FileUpload.PostedFile property shows NULL.remember my scriptmanager tag is in master page.

here is the code:

UploadImage.aspx

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

[Code]....

</asp:Content>

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FileUpload Control Inside Gridview (ajax Updatepanel)

Mar 11, 2011

I've got a fileupload control inside of a gridview so that each row (item from the database) can have an attachment associated with it. I've got a button next to the fileupload control (besides the default browse... button to select the file) to actually take the file and upload it to a file server. This works great if I use this button "Upload". However, underneath my gridview I have another imagebutton that is outside of the gridview, its just sitting on the form / page. The idea of this "Update" button is when end users make changes to the grid I can simply loop through the grid and update the values they have entered to the database. This also works great.

Now here is my issue assume a user has 3 rows in the grid view. On 2 of these rows he decides to add an attachment but he never clicks the "Upload" button he only uses the standard browse button to select the file. Now instead of clicking the "Upload" button that is on the grid view he ends up clicking the "Update" button outside of the grid thinking that it will save his attachments. So I decided to write code to grab the fileupload control from the grid using .FindControls("NameOfFileUploadControl") in my Update button loop where I loop through all the rows. Then I check if myFileUploadControl.HasFile property to see if there exists a file and if there does upload the file then continue with the code.

The issue is when I click this "Update" button .HasFile always returns false even though I can see the text string of the path in the fileuploadcontrol textbox (the standard one next to the browse button). Is it because this goes back to the page load event and checks if it is a post back? What causes this and how can I fix it? Im adding some code because im still confused with this

Protected Sub SaveGrid()
For Each Row As GridViewRow In Me.gvLineItems.Rows
Dim f As FileUpload = CType(Row.FindControl("fuAttachment"), FileUpload)
'todo: this part is not working
If f.FileName.Length > 0 Then 'returns 0 always
'this returns 0.
end if
if f.HasFile() then
'this also returns false
end if
Next
End Sub

This method gets called on a click of a button. The fileupload control is in an of a gridview that is wrapped inside of an UpdatePanel:

<asp:FileUpload Width="90px" Font-Size="xx-small" ID="fuAttachment" runat="server" />

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FileUpload Doesn't Work When Nested In UpdatePanel?

Jan 21, 2010

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:FileUpload onchange="clickTheButton();" ID="FileUpload1" runat="server" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" />
</Triggers>
</asp:UpdatePanel>

Button 1 is outside the update panel and the javascript that gets run when a user adds a file in the upload box is this:

function clickTheButton() {
document.getElementById('<%= Button1.ClientID %>').click();
}

The problem is simple. FileUpload1.HasFile == false. I don't know why this is, but when I put it in the update panel it ceases to work.

I have seen some other threads on this. But none of them answer why this is happening, they just point to things you can download.

EDIT: Really my main reason for wanting to do this is so that I can get a ..Uploading File.. Tag to pop up while the client is uploading to the server and once it has completed, display it in a datalist. I just cant get the UpdateProgress to work.

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Apr 19, 2010

I have a UserControl that is Added dynamicatlly into the page using UpdatePanel. That user control has an extender that does not work.

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this is my compelete code for validation type and display image with AsyncFileUplaodI'd like to upload only png, jpg, gifI can upload Image and have its preview successfullyand when try to  upload another type It prevents and fortunately I can see this message"Upload a valid file with extension png, jpg, gif."but UnfortunatelyIt shows a message box with this errotUnhandled Exception: this._innerTB is null what's my mistake? 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<!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>Validation in AsyncFileUpload Example</title>

[code].....

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AJAX :: Fileupload In UpdatePanel?

Sep 16, 2010

[Code]....

The FileUpload1.HasFile returns false when in the UpdatePanel Solution

[Code]....

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AJAX :: FileUpload Inside UpdatePanel

Dec 1, 2010

I am using FileUpload control inside UpdatePanel, but cant get it working and keep getting error : "Object reference not set to an instance..." on line: If fuAvatar.PostedFile.FileName <> "" Then I have checked several forum and people mentioned that we need PostBackTrigger but i just cant get it working and keep getting the "Object reference not set..." error. My FileUpload control is inside a panel and along with another control, and the upload occurs when user click on Finish button.

[Code]....

And my codebehind is:

[Code]....

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I'm having a problem with the FileUpload control in ASP.NET. It requires two postbacks to server in order to upload the file. In other words, after I select the file and click upload the page reloads but do nothing. Then I reselect the file and click upload then it works.

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<asp:FileUpload ID="_fileCv" runat="server" Width="500px" /><br />
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Here is the code behind:
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Mobiles :: How Does Fileupload Control Work In Website For Blackberry

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I tried to use the asp.net fileupload control for uploading a picture or music file, from blackberry device to server. But, What happened is ; the file is uploaded , ie, the file is created with 0 bytes in it. That is, file is actually not uploaded. Since blackberry browser doesn't support other fileformats, the device contains only .png & .m4a fileformats in its samples. I have used these sample in blackberry for uploading. The same has occured in the case of .m4a files also... Why is it so...? One more thing... The blackberry browser which I am refering here is the blackberry browser simulator, bold 9700.

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Web Forms :: Server Side Validation Of Fileupload Control Not Working

Aug 7, 2010

[Code]....

Public Sub CustomValidator1_ServerValidate(ByVal source As Object, ByVal args As System.Web.UI.WebControls.ServerValidateEventArgs) Handles CustomValidator1.ServerValidate
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Else
Dim Extension As String = UploadFileName.Substring(UploadFileName.LastIndexOf(".") + 1).ToLower()
If Extension = "xls" Or Extension = "xml" Then
args.IsValid = True ' Valid file type
Else
args.IsValid = False ' Not valid file type
End If
End If
End Sub
<table>
<div>
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<td><asp:LinkButton ID="BtnUpdate" runat="server" CausesValidation="True"
CommandName="Update" Text="Update" CssClass="updatebutton" OnClientClick="ValidateFileUpload();" /></td>
<asp:CustomValidator ID="CustomValidator1" runat="server"
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<td><asp:LinkButton ID="LinkButton2" runat="server"
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</tr>
</div>
</table>

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May 8, 2013

i have a file upload control to upload picture.i want the user can only upload picture not any other file . when i used file upload control ,user can insert word file also,this should not be done. user can only insert pictures,otherwise message should be appear

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[Code]....

[Code]....

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May 24, 2010

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I have read several post on the TreeView is not/partly working with the UpdatePanel, but none of them mention that an update (triggered by a timer) causes creation of multiple javascript functions in the HTML header. In Mozilla Firefox this a memory leak. I have created a test webapplication to demonstrate the issue we encounter.

[Code]....

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i have Accordion out side update panel ,

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i have tried this solution but its not give me any error but its dont update my udpanel, and when i have added it at design , it will give me error at runtime.

protected
void Page_Load(object sender,
EventArgs e) {
AsyncPostBackTrigger trigger =
new AsyncPostBackTrigger();
Button mybtn=Accordion1.FindControl("Mybtn") as Button;
trigger.ControlID =mybtn.ID;
trigger.EvernName="Click";
upUpdatePanel.Triggers.Add(trigger);
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May 28, 2010

I have two sliderextenders in a page, and one of them is in an UpdatePanel.When I slide the first one it set the minimum value and the number of steps of the second one (in the control panel) and it seems to work well.But if I slide the second one, as soon as I release the mouse button, my two sliders don't work anymore. I have to click them to change the value but can't slide them.

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