Hello,

In each record of an ASP.Net Repeater I have an image which original size is 200px width and with a height which can vary from record to record.

How can I resize each image to 50px and keep its proportion?

Does anyone know how to do this?

Thank You,
Miguel

Here's one article:
Creating Thumbnail Images on the fly with ASP.NET

Your width is a constant reduction (25% of original size), which makes it slightly easier rather than trying to take any dimension and scale to 50px wide...

1. Load the original into an Image object, and get the height.
2. Create a new Bitmap with a width and height that is 25% of original values.
3. Get a Graphics object for the bitmap.
4. Draw the original onto the bitmap, specifying a rectangle the size of the bitmap
5. Save file (or do whatever you need to do with it).
6. Dispose objects.

System.Drawing.Image original = System.Drawing.Image.FromFile(@"c:\10yearsreunion.jpg");

int height = original.Height;
int width = original.Width;

System.Drawing.Bitmap newPic = new System.Drawing.Bitmap(width/4, height/4);

System.Drawing.Graphics gr = System.Drawing.Graphics.FromImage(newPic);
gr.DrawImage(original, 0, 0, (width/4), (height/4));

newPic.Save(@"c:\10yearsreuinion_25pct.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);

gr.Dispose();
newPic.Dispose();
original.Dispose();