Vb net check file extension

I've got a HTA application which is running a VB script to delete files from a directory in a profile. As there are multiple files with the same extension I want to delete them all. I've got:. If I change the obj. To continue this discussion, please ask a new question. In above code Path. GetExtension method is called only once, instead of every time the extension is checked.

Second, it uses string build-in Equals method to check extensions. Third, syntax of the check against multiple extensions is fixed - look at the second condition regarding the image files - it is slightly different than yours. You may have already considered this, but another option if this is a common need would be to create a database table of common extensions and then write a function to query that table, passing in Path.

GetExtension as a parameter. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Check file against multiple extensions? Ask Question. Asked 7 years, 6 months ago. Active 7 years, 6 months ago. Viewed 1k times. Validate in Asp. In this article i will explain how to restrict user to upload the files of specific type through FileUpload control by validating through RegularExpressionValidator validation control.

Description: Sometimes it is required to validate the file extension before uploading file i. Similarly if you want only images of the type. Implementation: Let's create an asp.

Net Code to check and validate file extension before uploading a file. In the code behind. FileName ;. If neither path nor extension contains a period. The extension parameter can contain multiple periods and any valid path characters, and can be any length. If extension is null , the returned string contains the contents of path with the last period and all characters following it removed. If extension is an empty string, the returned path string contains the contents of path with any characters following the last period removed.

If path does not have an extension and extension is not null , the returned string contains path followed by extension. If extension is not null and does not contain a leading period, the period is added.

If path contains a multiple extension separated by multiple periods, the returned string contains the contents of path with the last period and all characters following it replaced by extension.