在 C #/. NET 中合并两个图像

This will add an image to another.

using (Graphics grfx = Graphics.FromImage(image))
{
grfx.DrawImage(newImage, x, y)
}

Graphics is in the namespace System.Drawing

basically i use this in one of our apps: we want to overlay a playicon over a frame of a video:

Image playbutton;
try
{
playbutton = Image.FromFile(/*somekindofpath*/);
}
catch (Exception ex)
{
return;
}


Image frame;
try
{
frame = Image.FromFile(/*somekindofpath*/);
}
catch (Exception ex)
{
return;
}


using (frame)
{
using (var bitmap = new Bitmap(width, height))
{
using (var canvas = Graphics.FromImage(bitmap))
{
canvas.InterpolationMode = InterpolationMode.HighQualityBicubic;
canvas.DrawImage(frame,
new Rectangle(0,
0,
width,
height),
new Rectangle(0,
0,
frame.Width,
frame.Height),
GraphicsUnit.Pixel);
canvas.DrawImage(playbutton,
(bitmap.Width / 2) - (playbutton.Width / 2),
(bitmap.Height / 2) - (playbutton.Height / 2));
canvas.Save();
}
try
{
bitmap.Save(/*somekindofpath*/,
System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch (Exception ex) { }
}
}

After all this, I found a new easier method try this ..

It can join multiple photos together:

public static System.Drawing.Bitmap CombineBitmap(string[] files)
{
//read all images into memory
List<System.Drawing.Bitmap> images = new List<System.Drawing.Bitmap>();
System.Drawing.Bitmap finalImage = null;


try
{
int width = 0;
int height = 0;


foreach (string image in files)
{
//create a Bitmap from the file and add it to the list
System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(image);


//update the size of the final bitmap
width += bitmap.Width;
height = bitmap.Height > height ? bitmap.Height : height;


images.Add(bitmap);
}


//create a bitmap to hold the combined image
finalImage = new System.Drawing.Bitmap(width, height);


//get a graphics object from the image so we can draw on it
using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(finalImage))
{
//set background color
g.Clear(System.Drawing.Color.Black);


//go through each image and draw it on the final image
int offset = 0;
foreach (System.Drawing.Bitmap image in images)
{
g.DrawImage(image,
new System.Drawing.Rectangle(offset, 0, image.Width, image.Height));
offset += image.Width;
}
}


return finalImage;
}
catch (Exception ex)
{
if (finalImage != null)
finalImage.Dispose();


throw ex;
}
finally
{
//clean up memory
foreach (System.Drawing.Bitmap image in images)
{
image.Dispose();
}
}
}