ASP.NET Upload Demo - File Validation - Client-side Validation

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Allowed extensions are: .zip,.jpg,.jpeg

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Note: The largest allowed combined file size for upload in this example is 100MB. This is specified by the maxRequestLength="102400" set in Web.config file. If you attempt to upload files with total size greater that 100MB you will get "Page Not Found" error. For more information about uploading large files visit the help article Uploading Large Files

Example Source Code & Description

Instructions

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Client-side Validation

RadUpload provides the client-side function validateExtensions, which validates file extensions on the client. The validation is done by integrating the RadUpload with a CustomValidator which will prevent the page from submitting when there are selected files with invalid extensions.

IMPORTANT NOTE: The ControlToValidate property of the CustomValidator must not be set!

If the validation must be performed server-side, then handle the ServerValidate event of the CustomValidator in code-behind.

Upload / Client-side Validation

Example Source Code & Description