The following example demonstrates how to create a FileUpload control. . You can use the ContentType property to get the MIME content type of the file. tLength); int length = ; string fileName = ng(); string type = File. ContentType. = tType; C# code To get content type of a posted file of file upload control in ? 01 Wednesday.

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Here is the VB. Why not just do reverse logic on the file extensions that are prohibited?

Is there no way of looking at a file’s internal content and identify contenttjpe is it’s file type? You need to maintain a black list of content type as you know what types needs to be blocked rather than the types which needs to be allowed even though later is a much secure practice.


Save Files to SQL Server Database using FileUpload Control

So your piece of code should work. FileUpload ContentType trickery Oct 09, We have a similar requirement and use both data type and file name extension to determine what is being uploaded.

This is the exactly what i need! FileUpload ContentType trickery Mar 05, NET, accepting file uploads from users has become extremely easy. So, MIME Types or reading the start of the data will not help – so best way postevfile to either ban these extensions altogether or rename the extensions to. This email is in use. Then you can use it to check the file type.

Oct 14, FileName ; if Finfo. Read theImage, 0, int FileUpload1. ToLower ; if FileUpload1.

FileUpload control

Below is the part where i validate my file types: However, please notice that there are security concerns to to consider when accepting files from users! Do you need your password?

FileUpload ContentType trickery Jan 13, Thanks in advance Regards Jatinder Walia. I m new to this forum.

Once the UploadButton is clicked, we check to see if a file has been specified in the upload control. Sign up using Email and Password. Please refer Privacy Policy for more details. You should add the following code to judge whether the posted file exist.


c# – How to Accept Files With Specified content type accross the Operating system – Stack Overflow

Try using a nested if statement three levels deep to insure the file passes all the way through. Have you checked this answer Using. I suspect your problem may be user error. I would recommend you to run through some antivirus webservice or scan before acepting the files something like http: Write ” File has been uploaded successfully! FileUpload ContentType trickery Feb 07, By using our site, you contfnttype that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Last post Mar 05, There is no reason that an upload from mac should behave differently than from pc. Stack Overflow works best with JavaScript enabled. Please follow these steps to reproduce the problem: Note that some of contenttyoe files you wish to omit are just text files: Please mark the replies as answers if they help or unmark if not.

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