File Can Upload With An Empty Posted Files Collection?
May 24, 2010
I have an ASP.NET file upload control which sits as part of a form. The file upload control is on the content page while the form definition is on a master page across the site. I've added multipart/form-enc to the form on the master page.I'm using jQuery to submit the form as I show a dialog box from jQuery UI.When I post, no file is returned to the server. The file upload control has no file and HttpFileCollection is empty.
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Similar Messages:
Jan 5, 2011
I am using Asp.net and requirement specifies i use html input to post files to server rather than asp:fileupload.[ Reason : Add more html input file controls similar to CPanel file manager.(i.e) clicking on link adds another file input from which user can select another file*.But when ever i post back Request Files collection is always empty.*
HTML FORM:
<form method="post" enctype="multipart/form-data" action="documents.aspx">
<div>
<input type="file" name="attachment" id="attachment" onchange="validate(this)" />
<span class="none">Filename should be within (1-25) letters long. Can Contain only letters
& numbers</span>
<div id="moreUploads">
</div>
<div id="moreUploadsLink" style="display: none;">
<a href="javascript:addFileInput();">Attach another File</a></div>
<input type="submit" id="btnSubmit" />
</div>
</form>
Javascript:
var upload_number = 2;function addFileInput() {
try {
var fileUpload = document.getElementById("attachment");
var elemSpan = nextElement(fileUpload).cloneNode(true);
var elemDiv = document.getElementById("moreUploads");
var d = document.createElement("div");
var file = document.createElement("input");
file.setAttribute("type", "file");
file.setAttribute("id", "attachment" + upload_number);
file.setAttribute("onchange", "validate(this)");
d.appendChild(file);
d.appendChild(elemSpan);
elemDiv.appendChild(d);
upload_number++;
} catch (err) { alert(err);}}
the validate(this) is a function that validates file types on client.When validation succeeds then the link to add more file inputs is enabled. Could someone throw somelight on this.
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Mar 28, 2011
I'm using a custom ashx handler to handle a file upload. When run locally, the file uploads fine.When I use the same setup on the web server I get a "Index out of range" error.In firebug I see the binary contents of the file in the post data and the file name is also passed in the query string.Any one seen this before?I`m sure its something minor, but its driving me up the wall.
Request header:
Key Value
Request POST /Secured/UploadHandler.ashx? HTTP/1.1
Accept text/html, application/xhtml+xml, */*
Referer http://cms.webstreet.co.il/Secured/fileUpload.aspx
Accept-Language he-IL
User-Agent Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)
Content-Type multipart/form-data; boundary=---------------------------7db13b13d1b12
Accept-Encoding gzip, deflate
[code]...
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Aug 10, 2010
I am using VS-2005.
In my website I have used the html input control with type=file.
The problem is that when I place this control inside an 'UpdatePanel' the 'PostedFile' property becomes 'Nothing' on postback. So in order to get things working I have removed the 'UpdatePanel' and things are working fine.
However, I am interested to know what kind of workaround is required if I were to use an 'UpdatePanel'? In one of the threads here I found that we need to set a 'PostBackHandler' for the update panel. I have no idea how to implement this. Does it refer to 'AsyncPostbackTrigger' or 'SyncPostBackTrigger'?
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Feb 2, 2011
my project is in c sharp and must upload pictures to MySql DataBasethe uploadfile controle is included in asp form that i made but the problem is that the uploadfile always get the Postedfile = null i tried to use html input file but the same problem still
@ Page Language="C#" MasterPageFile="~/MasterPageB.master" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="Add_Pictures" Title="Untitled Page" %>
<%@ MasterType TypeName="MasterPageB" %>
<%@ Register assembly="MyFormView" namespace="MyFormView" tagprefix="asp" %>
[code]...
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Jul 15, 2010
Im using a file uploader to upoad files to a folder used for upload.But the problem is this folder is a linux folder. I have made it a shared folder so that I can access from windows by samba. So, file transfer is successful when I'm using os but when I try to upload something from my websites uploader to this folder, this process is not successful. I have given all permissions to this folder.Don't know whats the problem.I have used both type of slashes for directory but still it is not successful.
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May 31, 2010
i am trying to upload files through the ASP.NET File Upload control.
Every thing is working fine, except for the fact that when i try to upload the file on the server i am getting an error: (probably some authorization exception).
do i need to give some rights to the upload up there on the server. If so then for which account and do i need to restart the server after giving rights?
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Nov 3, 2010
I am using AsyncFileUpload of ajax toolkit of asp.net. But while uploading a file of size 0kb, it gives me error "Unhandled exception: the file attached is empty". Is there any solution for uploading a blank file.
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Aug 23, 2010
i am using file upload control to upload the files in asp.net with vb.net as code behind. am storing the files in my local drive. my doubt is, how shall i read those file using asp.net application.
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Jan 25, 2011
i always got the empty string in form data posting. can you describe what the hell happened in my code? always got the empty string to insert to SQL server even it is drop down list selected value is empty. Is this the error in visual studio cause sometimes i can get the value and sometimes can't (inconsistent!!!)
Protected Function sqlparameter_insert_newscat() As SqlParameter()
Dim sqlparam(4) As SqlParameter
Dim ddlstatus As Boolean
If rbActive.Items(0).Selected = True Then
[code]...
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Jan 25, 2011
I've got stuck for this for a long time. I always got empty value for the posted data. Here is my code:
Protected Function sqlparameter_insert_newscat() As SqlParameter()
Dim sqlparam(4) As SqlParameter
Dim ddlstatus As Boolean
If rbActive.Items(0).Selected = True Then
ddlstatus = True
Else
ddlstatus = False
End If
sqlparam(0) = New SqlParameter("@username", SqlDbType.VarChar, 30, ParameterDirection.Input, False, 0, 0, "", DataRowVersion.Current, Session("user.id"))
sqlparam(1) = New SqlParameter("@news_category", SqlDbType.VarChar, 255, ParameterDirection.Input, False, 0, 0, "", DataRowVersion.Current, news_category.Text)
'Response.Write(HttpContext.Current.Request.Form(name))
sqlparam(2) = New SqlParameter("@news_category_desc", SqlDbType.Text, 1000000, ParameterDirection.Input, False, 0, 0, "", DataRowVersion.Current, HttpUtility.HtmlEncode(news_category_desc.InnerText))
sqlparam(3) = New SqlParameter("@news_category_status", SqlDbType.Bit, 1, ParameterDirection.Input, False, 0, 0, "", DataRowVersion.Current, ddlstatus)
sqlparam(4) = New SqlParameter("@news_category_parent", SqlDbType.BigInt, 100, ParameterDirection.Input, False, 0, 0, "", DataRowVersion.Current, ddlRoot.SelectedValue)
Return sqlparam
End Function
the news_category.text always the empty string even the dropdownlist selected value return empty string. Is this an error of bug in Visual Studio 2010? I 've got stuck for this for long time and i have been nearer to deadline. I just made change "ValidateRequest = False" to aspx file to permit html tag to be posted.
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Aug 3, 2010
i have a fileUpload in my web page but it's not supporting all files eg:
when i browse xls file it's working for small size files but when i go for a little bigger files let's say 50-60k it won't work and will give me an offline web page, i have tried the input HTML on server mode and still having the same problem.
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Apr 22, 2010
I have a File Upload Control, so i click the 'Browse' button and when i select a file from the select file dialog, i want the file to be shown as a link below the File Upload Control( somewhat similar to gmail). This file should be seen such a way that it can be deleted, if i wanted to. And also i should be able to upload another file from the File Upload control.All these files should be uploaded to a location when i use a button click event in the end.
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Jul 6, 2010
i am using file upload, i wanted to restrict the files showing in the dialog box to images only. That is 'Files of Type' in the dialog box should be .jpg,.jpeg,.gif,.bmp,.png
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Jan 6, 2011
Iam using a file upload control for uploading files in my asp.net application. iam using the following code to impersonate the users who do not have permission for the files to upload. The code works fine for all the files, but it is not working for the files which are in desktop.
Code in .cs file:
System.Security.Principal.WindowsImpersonationContext impersonationContext;
impersonationContext =
((System.Security.Principal.WindowsIdentity)User.Identity).Impersonate();
//Insert your code that runs under the security context of the authenticating user here.
impersonationContext.Undo();
In web.config iam using the following:
<identity impersonate="true" />
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Jul 26, 2010
I was wondering if there is a method where i can check to see if the file that a user is uploading is either one of the following formats:
Quote:
.doc
.docx
.pdf
I currently upload like so:
PHP Code:
[code]....
Now is there a way i can check to see if the files are of the above formats and limit the users to only be able to upload files of this format?
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Jun 18, 2010
What is the best way to restrict a file upload control to only accept video files only ?
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Jul 30, 2010
I am using a Aynchronous file uploader control to upload files.when I click on browse file button it opens a default dialog box. But i want to open it for a folder which is created by me on my system is any way to do this.
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Jan 12, 2010
I'm using a file upload control to save the documnets ina file server and i'm storing the url for the docs in database.
In a grid i'm binding the url to a hyperlink field. But the link is not working. The document is not openeing. Is this the correct way to do?
If the file is stored in a local machine it is openeing but if i store it in some fileserver it is unable to open.
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Jun 14, 2010
I just inherited an ASP.NET WebForms web application that I was tasked with refactoring. One of the features is a file upload and while debugging I noticed that as soon as a file is posted to a certain page/handler, it is automatically uploaded to the root directory of the application. The file is then moved to the proper location. I can't seem to figure out whats causing this automatic upload of the file. Is there something I'am overlooking in ASP.NET WebForms that allows this to happen? Is it an IIS configuration or something?
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Oct 25, 2010
I'd like to allow users to upload a .pdf file via the file upload control (if that's the best method), save the file to the db and then retrieve it so they can click on a link and open the .pdf they've uploaded. I've been looking for a tutorial on how to do this but keep running into methods of saving the file directly on the server in a directory, not in SQL server (using Linq and VB by the way)
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Nov 16, 2010
Im upload a file using file upload control and for unique identificaton
we use system.io.file.GetCreationTime(Path).Tofilename()
In local system the file is inserted in to the table and local folder - with 18 digitnumber +filename.
But after publishing, when we run, the files are inserted into the table without the 18 digit and error occured.
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Jan 6, 2011
Iam using a file upload control for uploading files in my asp.net application. iam using the following code to impersonate the users who do not have permission for the files to upload. The code works fine for all the files, but it is not working for the files which are in desktop.
Code in .cs file:
System.Security.Principal.WindowsImpersonationContext impersonationContext;
impersonationContext =
((System.Security.Principal.WindowsIdentity)User.Identity).Impersonate();
//Insert your code that runs under the security context of the authenticating user here.
impersonationContext.Undo();
In web.config iam using the following:
<identity impersonate="true" />
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Apr 9, 2013
I know the asp.net file upload control only allows users to select one file at a time, however i am looking for another way using asp.net to allow the users to select multiple files?
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Jan 20, 2013
I am selecting the file in the file uploader and when i press the button,the page gets postbacked and the selected files in the file uploader gets removed. I need to remain the selected file in the file uploader even thought the button clicked.
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