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Validating file extension with regularexpressionvalidator

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Hi, using version 4.5 I am trying to validate file upload image validation and seems this expression is not working.

Afaik javascript does allow inline options, but it applies to the whole regex and not just everything after it, which doesn't matter in this case.

Regular Expression to validate video file formats Here my need is to validate a file for only video formats, so that the user is able to upload the file in the valid video formats. Net application that contains a file upload control and with a regular expression validation control.

To validate only the video file, I provide the regular expression for video file formats to the validation control and some properties of the validation control to validate the file upload control.

In this article I explain validation with a file upload control using regular expression validation control in ASP. This article will help you to validate the extension of a file to be uploaded before the file is uploaded in ASP. Description Usually for checking the desired file extensions in a file upload control we use C# code to determine whether the file extension is valid or not.

But, we can also validate the file type of the file upload control using the ASP. We need to only provide the correct regular expression for the desired file type to the validation control.

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