AJAX :: AsyncFileUpload Control File Extension Validation Does Not Work With Image Preview
Jan 9, 2013
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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Similar Messages:
Dec 10, 2012
I tried this tutorial [URL] .... It doesn't work with and vs 2010, and ajax control toolkit 4 ( I downloaded from link belowand vs 2010) and It doesn't work with ajaxcontroltollkit 3.5 I downloaded from same link.but when i put Your AjaxControlToolkit.dll in bin folder of my project it works fine.
I downloaded the same version of tolkit.dll as yours (3.0.30930.0) and I worked for me.
but I'd like to use version 4.
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Feb 8, 2011
How would I go about having a thumbnail preview of an image that has been uploaded through AsyncFileUpload?
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Jun 23, 2010
Actually i am using JavaScript validation for Image or Word or Excel File & its working perfectly. My aim is making its full professional.
For Example When you use Photoshop and open any file you see only those extension which are applicable for Photoshop i.e. jpg, jpeg bmp, psd, png etc. You never see .doc, .xls or any other which are not open with Photoshop. This is i want to do, When i open for an Image it should show only Image Type file extension in file type By default its its showing All Files, As i use extension validation in JavaScript, it never accept .doc or .xls files in Image Type Validation but it will show. I want only that file type show for which i open.
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Jun 7, 2010
I can't get my <ajax:asyncfileupload> working and I don't see why...
When outside any panel or table it is working well, but as soon as I put it in a <asp:panel> or table I get a strange error which seems to be on client-side but I don't understand what's happen here. Here is the code and code-behind and Javascript.
Here's the error:
[URL]
Here's my front-code:
[Code]....
Protected Sub fupAjoutLogo_UploadedComplete(ByVal sender As Object, ByVal e As AjaxControlToolkit.AsyncFileUploadEventArgs)
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Jun 30, 2012
I used this code to uploading image and insert it to database
string path = Server.MapPath(".") + "../Upload";
string[] validext = { ".jpg", ".gif", ".png", ".rar" };
string ext =
System.IO.Path.GetExtension(AsyncFileUpload1.PostedFile.FileName);
if (Array.IndexOf(validext, ext.ToLower()) < 0)
[Code] ....
My problem is that it didn't insert image name in database it save some unknown Characters in database. So when I want bind my image from database it didn't show image .
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Jul 28, 2010
I would like to restrict what they see in the file upload dialog, which is set to "All Files" by default. I understand how to validate that they only uploaded a certain file type, that is not the question here. I would just like to know how to default the file type in the file selection dialog.
Is there any way to change this to "PNG only" or "*.png"?This is using AsyncFileUpload in the ASP.NET AJAX Control Toolkit.
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Jan 23, 2010
I am using this control to give the user the possibility to upload up to 5 pics. Well, it generally works fine but i started to test it using a folder full of pics. This folder contains more than 900 pics which are named from "DSC_8138.jpg" to "DSC_9255.jpg" (some has been deleted).
When i try to upload the pic "DSC_8138.jpg" it saves the pic "DSC_8168.jpg".
When i try to upload the pic "DSC_8141.jpg" it saves the pic "DSC_8147.jpg".
There is not any clear critieria in this.
I am quite sure that my code in the AsyncFileUpload1_UploadedComplete method cannot cause this problem. Actually, when i try to upload the pic "DSC_8141.jpg" the file name is still "DSC_8141.jpg" even though the pic uploaded is the "DSC_8147.jpg". in any case, the control deals with the uploading process.
[Code]....
[Code]....
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Feb 19, 2011
i am new to this ASP.NET and AJAX.I am trying to learn AJAX. I Have one doubt.what is the difference between normal file upload control and ajax AsyncFileUpload Control ..?
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Dec 13, 2010
am trying to use the AsyncFileUpload control in ajax toolkit to upload a picture file, save the file on a location on the server's filesystem and display the picture file back to the client system. I have both the image and AsyncFileUpload controls inside an updatepanel but its seems the UploadedComplete server code is not firing when the file upload completes any clue?
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Jan 24, 2011
I am having a strange issue associated with AsyncFileUpload control. after the upload, I am updating the page by calling__doPostBack function from ClientUploadComplete event handler. it works fine first time, but next time I try to upload the file, it refreshes the page first before uploading, then does the upload and refreshes the page again. not sure why refresh page is being called twice once before the upload and once after the upload. I have a simplified version of this code which has this bug.
[Code]....
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Sep 20, 2010
i am using fileupload asp.net controll so how i create image preview before image uploaded
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Jan 23, 2011
My problem is Asyncfileupload control is working fine when i debug the application and upload large file...but when i run this from iis it only upload file less then 5 kb. why is that so?? i did try adding Httpruntime maxRequestLength="4096" i tried to find on search but no help... did m i mising any settings..??
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Dec 30, 2010
When selecting an image for an item in file upload control of ajax toolkit (AsyncFileUpload), the only files that should be displayed are ".jpg, .jpeg, .gif, .bmp, or .png".
I currently can see every type of file.
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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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Jan 22, 2011
am using the AsyncFileUpload, when the AsyncFileUploadEventArgs event is fired i need to check if a textbox as been populated which i am doing. the problem is i am setting the validator to invalid. i would of thought this would display the error to the user, but nothing happens
protected void AsyncFileUpload1_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
{
[code]...
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Feb 8, 2011
I am working on url rewriting all is working fine on my local machine when i upload this site on production server the link of url rewrite which is extension less not work. i search the multiple solution in the google one solution is that insert the aspnet_isapi.dll in the properties->virtual directory tab->configuration->insert aspnet_isapi.dll site in working, but problem is that hosting provider refuse to add this dll. tell me alternate solution to add this dll from web.config file.
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Apr 14, 2013
How to display image in Image control after upload on the server asp.net C#Without pressing any key OR UPLOAD BUTTON
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Dec 30, 2010
Is there any way to have the AsyncFileUpload button work with 2 buttons:
- A "Select File" button
&
- An "Upload" button
??
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Aug 28, 2010
I'm having a problem with a Webusercontrol that has an asyncfileupload control. My websusercontrol is being loaded in a placeholder control that's wrapped by an updatepanel.Due to asyncpostback, I have to load and clear the placeholder's controls.
The webusercontrol works flawlessly, except the asyncfileupload, which doesn't want to upload at all. I can assure that the code is without error, because I used to have the webusercontrol running as an *.aspx site.
I guess that the problem is the fact that the control has to be cleared and reloaded with every asyncpostback ?
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May 7, 2015
I was referring muddasar's one of the article for the validation. Below is my code and i am trying to validate the file upload selected file format on the submit button. I have 4 upload control and fu1 is mandatory field and others are not mandatory fields. Though i need to validate all the four uploads if the files have been selected. My full sample code is below for easy testing,
<asp:FileUpload runat="server" ID="fu1" />
<asp:Label ID="lblMessage1" runat="server"></asp:Label>
<asp:FileUpload runat="server" ID="fu2" />
<asp:Label ID="lblMessage2" runat="server"></asp:Label>
[code]...
I am doing slight mistake on the return to the main function. if i test indvidual function it works fine. whereas if i include the 4 functions in one function with the return statement, it's not validating. goes to to the server.
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Dec 4, 2010
i need to create a photogallery page where the thumbnail images are placed and when the user clicks on the image the original image should be displayed in the modalpopup. it should also display the progress bar within the modalpopup before the original image gets loaded completely. i have seperate folders for thumbnail as well as original image.
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Jul 7, 2010
I am Getting strugle to get image preview after browsing image.please give me hand to get out from this problem.how to get image preview it may be through c#.net or javascript please give me code for this.i got very less examples from google but they are not worked.Please give me the CODE or sample project. and they should work in all browsers.
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Dec 2, 2010
I'm generating the rdlc at runtime and I'm using LoadReportDefinition(memorystream) to provide the definition to report viewer. It works fine but when I export it to pdf or excel, the file extension comes in as .xls[1] or .pdf[1].
I have tried giving the DisplayName property but it doesn't work.
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May 7, 2015
how to display multiple image after brows them without press upload button.
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