Generate a thumbnail in asp.net and add the copyright instance code

Copy codeThe Code is as follows:
// Define the object of the image class
Drawing. Image image, newimage;
// Image path
Protected string imagePath;
// Image type
Protected string imageType;
// Image name
Protected string imageName;
// Provides a callback method to determine when the Image object will be canceled before the thumbnail generation operation is executed.
// If this method determines that the GetThumbnailImage method should stop execution in advance, true is returned; otherwise, false is returned.
System. Drawing. Image. GetThumbnailImageAbort callb = null;

Private void sm_Click (object sender, System. EventArgs e)
{
String mPath;

If (""! = File1.PostedFile. FileName) // File1 is the file upload control.
{
ImagePath = File1.PostedFile. FileName;
// Obtain the image type
ImageType = imagePath. Substring (imagePath. LastIndexOf (".") + 1 );
// Obtain the image name
ImageName = imagePath. Substring (imagePath. LastIndexOf ("\") + 1 );
// Determine whether the image is a JPG or GIF image. Here is only an example. It is not necessarily a JPG or GIF image.
If ("jpg "! = ImageType & "gif "! = ImageType)
{
Response. Write ("<script language = 'javascript '> alert ('Sorry! Select a jpg or gif image! '); </Script> ");
Return;
}
Else
{
Try
{
// Create a virtual path
MPath = Server. MapPath ("UploadFiles ");
// Save to the virtual path
File1.PostedFile. SaveAs (mPath + "\" + imageName );

// Display the source image. imageSource is the image control.
// ImageSource. ImageUrl = "UploadFiles/" + imageName;

// Create a reference for the uploaded Image
Image = System. Drawing. Image. FromFile (mPath + "\" + imageName );
// Generate a thumbnail
Newimage = image. GetThumbnailImage (200,200, callb, new System. IntPtr ());
// Save the thumbnail to the specified virtual path
Newimage. Save (Server. MapPath ("UploadFiles") + "\ small" + imageName );
// Release the resources occupied by the image object
Image. Dispose ();
// Release the resource of the newimage object
Newimage. Dispose ();
// Display the thumbnail

AddTextToImg ("UploadFiles/" + "small" + imageName, "Pic Info"); // Add information to the image
Image1.ImageUrl = "UploadFiles/" + "small" + imageName;

Script. Alert ("Upload successful! ");
}
Catch
{
Script. Alert ("Upload Failed! ");
}

} // End else
}

// Add your own information to the image,
// AddTextToImg (physicPath, "Pic Info ");
Private void AddTextToImg (string fileName, string text)
{
// String sss = MapPath (fileName );

If (! File. Exists (fileName )){
Throw new FileNotFoundException ("The file don't exist! ");
}

// You also need to determine whether the file type is of the image type. I will not go into details here.

System. Drawing. Image image = System. Drawing. Image. FromFile (fileName); // MapPath (fileName ));
Bitmap bitmap = new Bitmap (image, image. Width, image. Height );
Graphics g = Graphics. FromImage (bitmap );

Float fontSize = 22.0f; // font size
Float textWidth = text. Length * fontSize; // the Length of the text.
// The following defines a rectangle area, and then draws black characters on the rectangle.
Float rectX = 0;
Float rectY = 0;
Float rectWidth = text. Length * (fontSize + 18 );
Float rectHeight = fontSize + 18;
// Declare the rectangular Field
RectangleF textArea = new RectangleF (rectX, rectY, rectWidth, rectHeight );
Font font = new Font ("", fontSize); // define the Font
Brush whiteBrush = new SolidBrush (Color. White );
Brush blackBrush = new SolidBrush (Color. Black );
G. FillRectangle (blackBrush, rectX, rectY, rectWidth, rectHeight );
G. DrawString (text, font, whiteBrush, textArea );
MemoryStream MS = new MemoryStream ();
// Save as Jpg
Bitmap. Save (MS, ImageFormat. Jpeg );

// Output the processed image. For demonstration convenience, I will display the image on the page
/** // * Response. Clear ();
Response. ContentType = "image/jpeg ";
Response. BinaryWrite (ms. ToArray ());
*/
FileStream fs = new FileStream (fileName, FileMode. OpenOrCreate); //. CreateNew );
Fs. Write (ms. ToArray (), 0, ms. ToArray (). Length );
Fs. Close ();

Image1.ImageUrl = fileName; // display the Image in the Image control
G. Dispose ();
Bitmap. Dispose ();
Image. Dispose ();
}