Add copyright information to images (C #) [Post]

Nowadays, more and more websites like to add copyrighted information to images uploaded by users. Do not think that it is added with image processing software such as PhotoShop. In fact, we only need to write a short piece of code, you can achieve this function.

The principle of adding copyright information is actually quite simple: the graphics class objects are obtained through images. This class has a drawstring () method that can write information to images and even make various effects, such as watermarks and transparent backgrounds. The last step is to save the image.

Create a Windows application project and design the interface.

The code for adding copyright information is as follows:

Code Generation:

// Create a bitmap Bitmap bitmap = new Bitmap (this. picturebox2.width, this. picturebox2.height, system. Drawing. imaging. pixelformat. format24bpprgb ); // Obtain the canvas Based on the bitmap Graphics G = graphics. fromimage (Bitmap ); // Clear the canvas and fill it with transparent colors G. Clear (color. Transparent ); // Draw another image to the canvas G. drawimage (this. picturebox1.image, 0, 0 ); // Write the copyright information to the image. G. drawstring (this. textbox2.text, new font ("", 15), new solidbrush (color. Red), new rectangle (20, 20, 100,100 )); // Display This. picturebox2.image = bitmap; // Save the image Bitmap. Save ("C: // abc.bmp", system. Drawing. imaging. imageformat. BMP ); By the way, the "select" button click event program: Private void button#click (Object sender, system. eventargs E) { If (this. openfiledialog1.showdialog () = dialogresult. OK) { If (this. openfiledialog1.filename. Length = 0) { MessageBox. Show ("select image", "error", messageboxbuttons. OK, messageboxicon. Error ); Return; } This. textbox1.text = This. openfiledialog1.filename; Filestream FS = new filestream (this. openfiledialog1.filename, filemode. Open, fileaccess. Read ); Try { This. picturebox1.image = image. fromstream (FS ); } Catch (exception) { MessageBox. Show ("the file you selected is not an identifiable image format", "error", messageboxbuttons. OK, messageboxicon. Error ); } Finally { FS. Close (); } } }