How to Change Image extensions In MVC

Dr. Ajay Kashyap,

If you want to change the actual image data from JPG to PNG (not only the extension), you can use LEADTOOLS programming SDK which supports loading and saving many image file formats including JPEG and PNG.
For example, the following code shows how you can load any supported image format (JPEG image) and save it to PNG file format on disk or in memory:
+-------------------+
using (Leadtools.Codecs.RasterCodecs _leadCodecs = new Leadtools.Codecs.RasterCodecs())
{
//Load the original JPEG image to a RasterImage object
Leadtools.RasterImage JPEGImage = _leadCodecs.Load(file.FileName);

//Save the RasterImage object to a temp PNG file on disk
_leadCodecs.Save(JPEGImage, "TempFile.png", RasterImageFormat.Png, 24);

//the following code saves the RasterImage object to a MemoryStream
System.IO.MemoryStream Memstream = new System.IO.MemoryStream();
_leadCodecs.Save(destinationImage, Memstream, RasterImageFormat.Png, 24);
Memstream.Seek(0, SeekOrigin.Begin);
}
+-------------------+
More details can be found here:
https://www.leadtools.com/sdk/formats

Note that you can add the above code in a web-service and call it from inside your ASP.NET MVC application, or you can use the code directly in your ASP.NET server side code

Disclaimer: I am an employee of this library.

if (Request.Files != null)
{
var file = Request.Files[0];
actualFileName = file.FileName;
fileName = Guid.NewGuid() + ".png";
//fileName = Guid.NewGuid() + Path.GetExtension(file.FileName);
int size = file.ContentLength;

try
{
file.SaveAs(Path.Combine(Server.MapPath("~/FileUpload"), fileName));
}
catch (Exception)
{
Message = "File upload failed! Please try again";
}