Web Forms :: File Extension Validation In FileUpload Control?
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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Similar Messages:
Mar 14, 2010
At the moment i get file extension of the file like :
string fileExt = System.IO.Path.GetExtension(filUpload.FileName);
But if the user change the file extension of the file ( for example user could rename "test.txt" to "test.jpg" ), I can't get the real extension . What's the solution ?
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Jan 7, 2011
how to change the default file extension,to any file what we need,using javascript.
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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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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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Jun 27, 2012
I have Fileupload control in my page
1-i want delete the text that is beside of fileupload button text: no file choesn
2-i want change text of file upload button( I want change Choose file text)
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Nov 19, 2010
i want to upload particular image file in asp.net and i m using regularexpressionvalidation but there is some error occurs so please help me.. i m using this syntex..
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="FileUpload1"
ErrorMessage="Only .jpg,.gif,.png files are allowed..." ValidationExpression="[^.].jpg$"></asp:RegularExpressionValidator>
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Mar 12, 2014
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,like--"please upload valid format"
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Oct 12, 2010
I have 2 custom validator controls on my page but for some strange reason the Custom Validator for FileUpload control works and the custom validator for TextBox control does not work. Here is the aspx code:
<asp:FileUpload ID="_fileCv" runat="server" Width="500px" /><br />
<asp:RequiredFieldValidator ID="_rfvFileCv" runat="server" ErrorMessage="Resume; " ControlToValidate="_fileCv" SetFocusOnError="True" ValidationGroup="APPLY">
<img src="images/mandatory.gif" alt="Required" /></asp:RequiredFieldValidator
<asp:CustomValidator ID="CustomValidator1" runat="server" ControlToValidate="_fileCv"
ErrorMessage="Max file size for documents is 4MB." OnServerValidate="CustomValidator1_ServerValidate" ValidationGroup="APPLY"></asp:CustomValidator>
<asp:TextBox ID="_txtHealthComments" runat="server" TextMode="MultiLine" Rows="5" Width="500" />
<asp:CustomValidator ID="CustomValidator2" runat="server" ControlToValidate="_txtHealthComments"
ErrorMessage="Kindly enter health Comments ." OnServerValidate="CustomValidator2_ValidateHealth" ValidationGroup="APPLY"></asp:CustomValidator>
Here is the code behind:
protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args) {
if (_fileCv.FileBytes.Length > 4194304) {
args.IsValid = false;
} else { args.IsValid = true; } }
protected void CustomValidator2_ValidateHealth(object source, ServerValidateEventArgs args) {
if (_rdoHealth.SelectedValue == "1" && _txtHealthComments.Text == "") {
args.IsValid = false; } else { args.IsValid = true; } }
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Oct 14, 2010
I have a FileUpload control in an UpdatePanel and when user select a file, the full file path will will be stored in a hiddenfield, and during postback, i would like to assign the full file path in the hiddenfield back to the FileUpload control textbox, possible to achieve that?
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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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Aug 7, 2010
[Code]....
Public Sub CustomValidator1_ServerValidate(ByVal source As Object, ByVal args As System.Web.UI.WebControls.ServerValidateEventArgs) Handles CustomValidator1.ServerValidate
' Get file name
Dim uploadAvatar As FileUpload = DirectCast(AdvertisementForm.FindControl("uploadAvatar"), FileUpload)
Dim UploadFileName As String = uploadAvatar.PostedFile.FileName
If UploadFileName = "" Then
' There is no file selected
args.IsValid = False
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>
<td><asp:FileUpload ID="uploadAvatar" runat="server" /></td>
<td><asp:LinkButton ID="BtnUpdate" runat="server" CausesValidation="True"
CommandName="Update" Text="Update" CssClass="updatebutton" OnClientClick="ValidateFileUpload();" /></td>
<asp:CustomValidator ID="CustomValidator1" runat="server"
ClientValidationFunction="ValidateFileUpload"
ErrorMessage="Please select valid .jpg or .bmp file" ></asp:CustomValidator>
<td><asp:LinkButton ID="LinkButton2" runat="server"
CausesValidation="False" CommandName="Cancel" Text="Cancel" CssClass="cancelbutton" /></td>
</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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May 7, 2015
I am planning to create a web page with the name of the student, course,pic and the resume to be uploaded by the user for specified students...
If I upload the resumes of students with same name how to differentiate. Looking for creating a name of the file name randomly as next I'm planning to retrieve the resume via search function to download and view the resumes....
Saving the resumes with same name with differentiate or randomly to save the files with new file name....
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Jul 17, 2012
How to get the full path of the file that is selected using the fileuploader.
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Jul 26, 2010
i am uploading a file through file upload control , file size has greater then 4 MB, I have to give the proper alert msg to the user that file size exceeding the limit.how to do it , because at server side it is crashed on the IIS and not return to the server to check the file size validation.that how it is possible to validate the file size and give the proper alert messege
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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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Sep 23, 2010
Is there a way to specify a file extension for ASP.NET upload control? E.g. I want to upload images with jpg and png extensions only.I can implement this easily for a windows application, but struggling with ASP.Net
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Sep 15, 2010
The requirement is that the whole original file path be saved to the database; for example: L:folder1folder2xyz.doc. However; the FileName property of the FileUpload control will only give "xyz.doc". We are interested in obtaining the full path only and really not interested in using the control to do any upload.
Is there any way to get the full path? We would like our user to be able to browse to the target file instead typing into a textbox because the folder name could be very long and several levels deep in our organization.
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Nov 11, 2010
I need to create folder and save in to the documentfor example:Suppose if upload the file that file should be save into as/as1/filename like i want saveas/as1/filename, this name will chnage for different different actions..
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Jan 10, 2011
I have a fileupload control on my page that I use to add files to my DB. When I point it to a .swf file it fails.The file is 2.69mb.I check the fileupload1.hasfile and it is false.I have tried to increase the
[Code]....
which is over 10mb with still no luck.Any thoughts why a flash file is not recognized?
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Sep 10, 2010
i want to set default value in Fileupload control.Because when i select file name using fileupload then save that file to sqlserver database i got problem when no file is select. so i found alternate of that i should store default image into database through fileupload control but now my query is how to set default image to fileupload control. i want source code.
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Dec 29, 2010
how can we set address file to FileUplload by code
i want to save a file from client to server by code
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Sep 8, 2010
i want to upload file to web server without using fileupload control...
here is issue is that i have static path and using that path i want to upload that file to web server..
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Sep 4, 2013
I have created a table in database and i have inserted all the data but i cant able to insert the fileupload buttons data in database
SqlCommand cmd=new SqlCommand("insert into reg values('"+txt_name1.Text+"','"+txt_mobile1.Text+"','"+txt_email1.Text+"',
'"+txt_qualification1.Text+"','"+txt_yearofpassing1.Text+"','"+FileUpload2+"')");
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