How to create a Thumbnail Images even the users give in different ration in c#.

__________________
H2O

Without us, no one can survive..

float ratio;
float imgHeight = 0;
float imgWidth = 0;
float boxWidth = 70;
float boxHeight = 50;

string file = Request.QueryString["file"];
string bwidth = Request.QueryString["Width"];
string bheight = Request.QueryString["height"];

if (!String.IsNullOrEmpty(bwidth))
boxWidth = float.Parse(bwidth);

if (!String.IsNullOrEmpty(bheight))
boxHeight = float.Parse(bheight);

if (!File.Exists(file))
{
file = Server.MapPath("Images/img_empty_user.gif");
}

System.Drawing.Image image = System.Drawing.Image.FromFile(file);

imgHeight = image.Height;
imgWidth = image.Width;

ratio = (float)imgHeight / imgWidth;
imgWidth = boxWidth;
imgHeight = ratio * boxWidth;
imgHeight = boxHeight;

System.Drawing.Image thumbnailImage = image.GetThumbnailImage((int)imgWidth, (int)imgHeight, new System.Drawing.Image.GetThumbnailImageAbort(Thumbn ailCallback), IntPtr.Zero);

// make a memory stream to work with the image bytes
MemoryStream imageStream = new MemoryStream();

// put the image into the memory stream
thumbnailImage.Save(imageStream, System.Drawing.Imaging.ImageFormat.Jpeg);

// make byte array the same size as the image
byte[] imageContent = new Byte[imageStream.Length];

// rewind the memory stream
imageStream.Position = 0;

// load the byte array with the image
imageStream.Read(imageContent, 0, (int)imageStream.Length);

// return byte array to caller with image type
Response.ContentType = "image/jpeg";
Response.BinaryWrite(imageContent);

So,you are explaining how image cropping can be done?Am i right?

Regards,
Sathish kumar.R

hey,


Yeah, please give me example for Image Cropping to implement in project.

__________________
Venkat
knowledge is Power

Hey Venkat,
This is the method with which we can do Image Cropping in c#.Net in a more easier way.

public static Image Crop(Image image, int cropLeft, int cropTop, int cropWidth, int cropHeight)
{

Bitmap newImage = new Bitmap(cropWidth, cropHeight);
Graphics g = Graphics.FromImage(newImage);
newImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);
g.DrawImage(image, new Rectangle(0, 0, cropWidth, cropHeight), new Rectangle(cropLeft, cropTop, cropWidth, cropHeight), GraphicsUnit.Pixel);
return (Image)newImage;
}

__________________
Sathish Kumar.R
Knowledge is meant to SHARE