C# - Examine The File Content Being Uploaded?

Sep 6, 2010

I'd like to get both C# and VB.NET sugestion.

I have an ASP.NET FileUpload control, which allows only image type. I used RegularExpressionValidator like below.

<asp:FileUpload ID="fuPhoto" runat="server" TabIndex="40" />
&nbsp;<asp:RegularExpressionValidator ID="RegularExpressionValidator3"
runat="server" ControlToValidate="fuPhoto" Display="Dynamic"

[Code]....

This method will only verify the file's extension, not its actual type. Once I receive the file, I want to examine its contents to determine what it really is, in this case image only.

How do I examine the file content being uploaded?

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[code]....

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[code]....

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[Code]...

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[code]....

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[Code].....

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