.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
david stephan
Gaurav Pal
Post New Web Links

Finding client file size before uploading

Posted By:      Posted Date: September 28, 2010    Points: 0   Category :ASP.Net

I need to upload images from client to server as follows:

1. Server is passing the client a file name
2. Client is checking file extensins to ensure it's an image then issues a __dopostback to the server.
3. Server uses the FileUpload control to save the image on the server.

I have that all covered, but, if image is too large, the upload fails with the following error: 'System.Web.HttpException: Maximum request length exceeded.'

Is there a way to check file size on the client (without the use of ActievX which also errors out), before it is passed back to the server?

Sample code will be greatly appreciated.

View Complete Post

More Related Resource Links

check file size before uploading process in c# with asp.net


Hi All,

Thank you for Advance.

currently we are configured execution Timeout="1200" (The default is 110 seconds)  and maxRequestLength="12288"  (The default is 4096 KB)

but some times users upload files above 12MB so we are getting "Maximum request length exceeded" error.

we are checking the file size using client side javascript ActiveXObject object. but ActiveXObject only works in IE not in others like mozilla,crome,...

Jacescript Code are

function GetSize(file)
  var fso=new ActiveXObject("Scripting.FileSystemObject");
  var f=fso.getFile(file);
  return fso.getFile(file).size;


how can i check the file size before uploading process with support all the browser.

any posiblities for checking file size before server side script/object?


How to go around the file size issue when uploading large files?



In my application the user uploads three files ( Resume, Cover Letter, Selection Creteria).

I want users not to upload more then 4 MB files, so In my web.confing file I have allowed max of 5 MB. <httpRuntime maxRequestLength="5000"/>. I did this so that I can validate the file and give user a message that they are trying to upload more then 4 MB file.

It all works fine if the user is only uploading resume. But if the user uploads all three files of size 4MB then my validation does not work and it goes to connection time out.

How can i handle the validation to check the file size of all 3 files?


AsyncFileUpload is not uploading the file



I have added AsyncFileUpload to creata user wizard control. When I tried to upload the file this control seemed to work fine and show confirmation at the end. But when I checked the website no file has been uploaded at all.

Here is the code, please let me know why its not uploading the files/images

<asp:ToolkitScriptManager ID="ScriptManager1" runat="server"></asp:ToolkitScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<asp:CreateUserWizard ID="CreateUserWizard1" runat="server"  
 FinishDestinationPageUrl="~/MyPage.aspx"                                     LoginCreatedUser="False" CreateUserButtonText="Add" oncreateduser="CreateUserWizard1_CreatedUser1" 
<asp:CreateUserWizardStep ID="CreateUserWizardStep1" runat="server" >
<asp:WizardStep ID="WizardStep1" runat="server" Title="Set preferences">
<asp:AsyncFileUpload ID="AsyncFileUpload1" runat="server" ThrobberID="spanUploading" OnClientUploadError="

Uploading to SQL Server using AJAX muiltiple file uploader and dynamic SQL Server Tables


I am getting an error on the following code when trying to pload files directly to a database.  

 Incorrect syntax near ','.

 Incorrect syntax near 'image'.


    Private Sub Uploader_FileUploaded(ByVal sender As Object, ByVal args As UploaderEventArgs)

        Dim data() As Byte = New Byte((args.FileSize) - 1) {}

        Dim stream As Stream = args.OpenStream

        stream.Read(data, 0, data.Length)

    End Sub


Private Sub ButtonTellme_Click(ByVal sender As Object, ByVal e As EventArgs)


        Dim objConn As New SqlConnection("Data Source=mrpoteat.db.2798093.hostedresource.com; Initial Catalog=mrpoteat; User ID=mrpoteat; Password=Colgate23;")


        Dim strCommandText As String = ""

        For index = 1 To Attachments1.Items.Count Step 1

            strCommandText += "pic" + index.ToString() + Space(5)

Access to path xxx denied when uploading a file using c#

Hi I have a file upload app written in c#. The app runs on IIS on a Windows 2003 Server OS. I want the app to upload the file onto the server (The app and the server are on the same machine). This code has been working fine for a long time running on Windows Server 2000, and Windows XP Professional. Now when I moved onto Windows Server 2003, it stopped working. I have given ASPNET account full access to the folder on the server, and it still gives this error. Is this a bug in 2003, and can anybody assist me? Thanks Shane

Log file size question

I recently setup transaction log backups after we had a log file get near its capacity. I noticed after log files are truncated, they still use up the same amount of disk space. Is it safe to shrink a log file?  If so how do you determine what is an appropriate size to shrink it to? I ask this because some databases, like a sharepoint content database, have log files that are 130 GB in size when their data files are only 5 GB.  I assume that now that I am running hourly log backups they dont need logg files that huge. -Edit - Also most of the logg files are setup with the default settings

Microsoft.SharePoint.Client.File.OpenBinaryDirect - returns a 404 error if the file being requested

Hopefully someone can help with this. I'm using Sharepoint 2010. On the server I have manually created a folder in the "Shared Documents" folder called "bin" and uploaded a file into this folder If I attempt to access the files in this folder using the Microsoft.SharePoint.Client.File.OpenBinaryDirect function,  I receive the following error: A first chance exception of type 'System.Net.WebException' occurred in System.dll: System.Net.WebException: The remote server returned an error: (404) Not Found.    at System.Net.HttpWebRequest.GetResponse()    at Microsoft.SharePoint.Client.SPWebRequestExecutor.Execute()    at Microsoft.SharePoint.Client.File.OpenBinaryDirect(ClientContext context, String serverRelativeUrl). Any other files in any other folders under the shared documents folder are accessible. Here is my example code: ClientContext clientCTX = new ClientContext(SPURL);             //Pass the credentials to the client context             clientCTX.Credentials = credentials;             List DeployFilesList = clientCTX.Web.Lists.GetByTitle("Shared Documents");             CamlQuery caml

Saving Image File in a Folder on Sever from Client Machine using Sql Server

  Hi EveryOne... Can anyone help me Saving an Image file in a Server folder from a client machine using Sql server 2005....   

Uploading a file to a document library produces access denied error, but only on first try.

Hi I have a task which uses a custom form which is part of a custom workflow.  The form incorporates an asp fileUpload control to allow a user to browse for a local file which they can then select and it will be upload a file to a folder in a document library.  The first time this action is performed the folder in the document library will not exist so the code creates a folder and then uploads the file to it. The problem I have is, the first time users try and upload a file the directory is created in the document library as expected, but then the user gets redirected to the standard SharePoint Access Denied page.  If the user goes back to the task list, then loads the task web page again, selects the same file and hits upload, then the file is uploaded fine. All subsequent file uploads work fine after that for all users. Users have Contribute permissions on the document library. The code to do the upload is as follows.  The task has a "CR Number" associated with it, which the directory in the doc library should be called.  It uploads the file to a stream.  Then gets the url of the web and works out the file url and uploads it.  The creation and checking of the folder in the doc library happens in the getDirUrl method. /// <summary> /// Processes an uploaded file. /// </summary> /// <param name="

Uploading Large File (40mb) fails... (webhttpbinding) (Azure)

I'm using javascript to upload a file to my WCF service hosted on Azure.  (40 mb file) Here is the snippets from the web.config for the service: <system.serviceModel> <bindings> <webHttpBinding> <binding transferMode="Streamed" maxBufferSize="2147483647" maxReceivedMessageSize="2147483647" openTimeout="00:25:00" closeTimeout="00:25:00" sendTimeout="00:25:00" receiveTimeout="00:25:00" name="WebConfiguration"> </binding> </webHttpBinding> </bindings> <behaviors> <endpointBehaviors> <behavior name="RestfulEndpointBehavior"> <webHttp/> </behavior> </endpointBehaviors> <serviceBehaviors> <behavior name="CPUploadServiceBehavior"> <serviceMetadata httpGetEnabled="true" httpGetUrl=""/> <serviceDebug includeExceptionDetailInFaults="false"/> </behavior> </serviceBehaviors> </behaviors> <serviceHostingEnvironment aspNetCompatibilityEnabled="true"/> <services> <service name="CPUpload" behaviorConfiguration="CPUploadServiceBehavior"> <endpoint add

Problem with uploading a zip file containing xls with macros

I am getting the following error when I try to upload a zip file containing xls file with macros. The zip file size is 4 mb. However, we have SP 2010 environment (ready to be deployed in couple of months) and it works there. So, it is not to do with the file. I am not sure if SP 2007 has any limitations/restrictions with .xlsm files. How do I fix this issue ? "GILA_Reports_File_byGTStar_9_2010.zip" contains the following virus: "Large uncompressed size; Tagged ID: C57E7332_69BC_484A_B087_DB04D574CDC4" . This file cannot be saved to the document library. If you want to save this file to the document library, clean the file using alternative virus scanning software and try saving it again.

Client download .csv file from server using Response.TransmitFile

I am using the code below to enable clients to download a .csv file from my server.The problem I am having is that when the file is saved to the client computer the file name is prefixed and suffixed with an underscore which leads to a file type of .csv_ which is obviously not a recognised file type.How can I strip the underscores from the file name at the transmit stage?        Dim FileName As String = LstBox1.SelectedItem.ToString        Dim FilePath As String = "~/temp" & FileName        Response.Clear()        Response.ContentType = "text/csv"        Response.AddHeader("Content-Disposition", "attachment; filename=\" & FileName & "\")        Response.TransmitFile(FilePath)        Response.End() 

user.identity.name="0" when uploading file using ajaxToolkit:AsyncFileUpload

hi, i am using AsyncFileupload to upload user picture. after the picture is uploaded and saved i opened another page and i noticed that the user.identity.name is lost. any idea 

file size increase when moving from file system to sharepoint 2007

Hi, While moving files from file system to Sharepoint 2007 via windows explorer view, why do file sizes increase? thanks, Burcu  

Uploading doc file into SharePoint Document library Programatically.

Hi all, I want to upload the doc file into SharePoint document library using the FileUpload control. For that I am created a new document library in my SharePoint site. But I am not getting the path of Document library where I want to upload the file. Waiting for your valuable response. Regards,-Kaustubh

Error In Firefox When uploading a file

The page isn't redirecting properlyFirefox has detected that the server is redirecting the request for this address in a way that will never complete.    *   This problem can sometimes be caused by disabling or refusing to accept          cookies.
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend