Restrict certain characters in uploaded files

[James Rintoul]

We need a way to stop end users uploading images through the image manager that have certain characters in the file name. If a user uploads a file named with spaces or special characters it's a nightmare for our application to deal with it, so we want to prevent the problem at the root cause.

Is there a way to do this? Can the file browser filter out these files or is there some validation event we can use before the upload begins?

I think the FileBrowserContentProvider *may* be want  but I only need to override the default behaviour in one place rather than do a completely custom implementation.

Any advice much appreciated.

Thanks,
James.

[Rumen]

Hi James,

My suggestion is to implement a FileSystemContentProvider, which will require to override only the functions that you would like. Here is an example how override only the StoreFile method which is fired when saving a file:

public class MyContentProvider : Telerik.WebControls.RadEditorUtils.FileSystemContentProvider
 {
        public MyContentProvider(HttpContext context, string[] searchPatterns, string[] viewPaths, string[] uploadPaths, string[] deletePaths, string selectedUrl, string selectedItemTag) : base(context, searchPatterns, viewPaths, uploadPaths, deletePaths, selectedUrl, selectedItemTag)
        {
        }

        public override string StoreFile(HttpPostedFile file, string path, string name, params string[] arguments)
        {
            //add here your validation code for file upload
        }
    }

    private void Page_Load(object sender, System.EventArgs e)
    {
        RadEditor1.FileBrowserContentProviderTypeName = typeof(MyContentProvider).AssemblyQualifiedName;
    }

Feel free to modify the code to fit your scenario.

Greetings,
Rumen
the Telerik team

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