C# - Asyncfileupload Doesn't Work In Webusercontrol?
Aug 27, 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. control has to be cleared and reloaded with every asyncpostback ?
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 ?
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)
I have an asyncfileupload control within a panel control. The panel is initially set to visible=false on page load. After a user clicks a button to display the panel contents however, I set the panel to visible and the user can then use the asyncfileupload. The problem however, is it seems much of the javascript associated with the asyncfileupload, does not function properly when the panel containing the upload control is set from invisible to visible. If I set my panel's "visible" property to "true" initially, then it works fine. My javascript error message is as follows:
"Form contains a file input, but is missing method=POST and enctype=multipart/form-data on the form. The file will not be sent."
Basically within my asyncfileupload control, I have the following line:
[Code]....
In this scenario, my "args" variable is always null (when I set my pane's "visible" property to "true" on page load, the args variable DOES contain data. Any idea why switching a panel from visible=false to visible=true, would cause an error like this?
As far as I can see, the following code should make an AsyncFileUpload display in ModalPopupExtender. The MPE shows fine but the AsyncFileUpload doesn't load inside it. I also tried removing the update panel and putting the divs both inside and outside of the update panel, all with the same (lack of) results. And the AsyncFileUpload displays and works outside of the MPE.
Dim path As String = Server.MapPath("~/temp/test.tmp") AsyncFileUpload2.SaveAs(path)
In my AsyncFileUpload2 object the filename is nothing. I can't seem to get a refernce to the file that is supposed to be uploaded.
-Nate UPDATE I've added Private Sub AsyncFileUpload1_UploadedComplete(ByVal sender As Object, ByVal e As AjaxControlToolkit.AsyncFileUploadEventArgs) Handles AsyncFileUpload1.UploadedComplete If e.state = AjaxControlToolkit.AsyncFileUploadState.Success Then '....' Else showErrorMessage(e) End If End Sub
I can't hit a break point at the "if" statement after I choose a file. I guess there is something wrong on my page with how ajax is working? Not sure what it is though. I was displaying the ajax upload box via a radio button with a visible=true/false div. The answer told me that the control has to be there the page loads. I took away the div and everything worked! I will now do the show/hide through jquery (which I should have done in the first place).
I am using the AsyncFileUpload control in AJAX. This code that I use works fine. What it does it to replace an existing .JPG file that was choosen from the users computer.The thing that I wonder now is that when the .JPG picture was replaced I am using this code to show the uploaded picture in an ImageControl
I recently came across the AsyncFileUpload control in the latest (3.0.40412) release of the ASP.Net Ajax Control Toolkit. There appears to be an issue when using it in a hidden control that is later revealed, such as a <div> tag with visible=false.
I am a new to WCF. I have written ajax to use a web service before, but on this project I am trying to use ajax to WCF.After I build the project and wcf using ajax, I receive the return successfully. But, 10 or more minutes later I don't get a return, the ajax calls the error function, and the fiddler returns nothing.
If I rebuild the project without any source modifying, I receive the return successfully again.
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>
I am trying to save an updated xml file to a url like this:
Quote:
//save the output to a file xmlDoc.Save("http://www.example.com/HomeNewsLinks.xml");
But I get this error: URI formats are not supported.
Did some google search on this and it seems I need to use client.uploadFile method, but I am not able to find how to declare/define filenamexxx (below) and how to pass a username/password.
Quote:
WebClient Client = new WebClient(); Client.UploadFile("http://www.example.com/HomeNewsLinks.xml", Post, filenamexxx);
I am following though the examples in Professional ASP.Net MVC 2 and one of the examples doesn't work for me.
[HttpPost] public ActionResult Edit (int id, FormCollection collection) { Dinner dinner = dinnerRepository.GetDinner(id); if (TryUpdateModel(dinner)) { dinnerRepository.Save(); return RedirectToAction("Details", new { id = dinner.DinnerID }); } return View(new DinnerFormViewModel(dinner)); }
I understand that it's suppose to take the values from the FormCollection, and then update the dinner object with it, bit I don't see the collection get referenced anywhere.
I have div which it is hidden by default , when the use clicks show link the following javascript method is called:
function ChangeControlVisibility(elementID) { var element = $("#" + elementID); if (element.css('display') != 'block' && element.css('display') != 'table') { element.show();
[code]....
this step works but when i call the previous method at page_load event the method doesn't work: element.css('display') undefined.
I have a Gridview in UpdatePanel and a textbox in which i input a string, the row is searched from gridview onkeyup of textbox.For example when i entered "testing" one row is displayed in gridview having "Edit" command and when i clicked on "Edit" it goes to top of the row having another data is converted into edit mode but that rows is not changed into textbox.
Then I tried to retrieve node type from Node this way - Nodes node = Entities.Nodes.First(); string nodetype = node.NodeTypes.Name; but for some reason node.NodeTypes equalls null despite fact that there is some records in NodeTypes table.
I have a listview in which I use a pager control. When I have more than 1 item in the list view, I want the user to be able to click on the appropriate page number and go to it. Simple right?, right now the first time the user clicks on the page number, nothing changes. If they click on it again, it goes right to the page. It doesn't matter what page they click on, it ALWAYS requires a second click to display the data item.
I know that UpdateProgress doesn't work with PostBackTrigger, but let me explain what i'm trying:
I'm generating a PDF document (Crystal Report) with ExportToHttpResponse that will be downloaded automaticaly by the browser.
So while the document is been generated, i'd like to show the UpdateProgress just while i'm waiting the doc is being generated, doing the UpdateProgress(or some label) to disappear.
I've been trying to fix something on a secure website (https) which is an Export to Excel button that generates a CSV file. It works on Firefox, Chrome , etc... but not in Internet Explorer. I have changed the headers eliminating the no-cache and also edited the IIS http header configuration setting an expiration date of 1 day. I have no idea of what can be going on and how to solve it. Do you guys have any idea of how to fix this stuff ? I've read so many posts and they're all saying the same thing... caching.
UPDATE 1 :
regarding the error I receive, I receive an IE Alert saying "Internet explorer cannot download filename.aspx from [URL]Internet Explorer was not able to open this Internet site. The requested site is either unavailable or cannot be found. Please try again later. As I said, it all works out of SSL (https), but the export to excel button, breaks in https.
