How to load image from Content folder in ASP.NET MVC5?

Question

I'm having a WebAPI project (MVC5) and just put an image in Content/Images. I'd like to load this image in C# and edit some stuff on runtime:

string originalFileName = "/Content/Images/Image.png";

Bitmap bitmap = new Bitmap(originalFileName);
Graphics g = Graphics.FromImage(bitmap);

This does not work unfortunatly, I'm getting an exception: System.ArgumentException - >Parameter is not valid.

My setup (code view left, solution explorer right): enter image description here

Dai · Accepted Answer · 2015-04-07 18:05:49Z

3

Use an Application-root-relative filename (add a ~ character): ~/content/Images/Image.png.
Use Server.MapPath to convert the Application-root-relative filename to an absolute filename.
Pass this absolute filename into the Bitmap constructor.

Like so:

String fileName = "~/Content/Images/Image.png";
fileName = Server.MapPath( fileName );
if( File.Exists( fileName ) ) {
    using( Bitmap bmp = new Bitmap( fileName ) )
    using( Graphics g = Graphics.FromImage( bmp ) ) {
        // do stuff here
    }
}

answered Apr 7, 2015 at 18:05

Dai

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2 Comments

Niels Over a year ago

Server.MapPath does not seem to exist in the namespace? I'm only getting Microsoft.SqlServer.Server and System.Web has been added.

Niels Over a year ago

Ah, it's System.Web.HttpContext.Current.Server.MapPath Thanks!

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