我正在做的是制作一个设计卡并实时显示图像的程序.我已经完成了这一部分,并且效果很好.现在,我需要裁剪图像并将其保存为atm的方式进行保存,顶部和底部有2个白色条.这是我现在用于保存的代码.

        private void SaveCardbtn_Click(object sender, EventArgs e)
        {
            //Open the saveFileDialog
            if (saveWork.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                CardImg.Image.Save(saveWork.FileName, ImageFormat.Jpeg);
            }
        }

谢谢.

解决方法:

我已经在ASP.NET论坛中发布了这个答案.
请试试这个 –

以下裁剪功能将接受4个参数：

>宽度：这是裁剪图像的宽度.
>高度：这是裁剪图像的高度.
>源图像文件路径：这将是源图像文件的完整路径.
>保存裁剪的图像文件路径：这将是保存裁剪的图像文件的完整路径.

public static void CropImage(int Width, int Height, string sourceFilePath, string saveFilePath) {
// variable for percentage resize 
float percentageResize = 0;
float percentageResizeW = 0;
float percentageResizeH = 0;

// variables for the dimension of source and cropped image 
int sourceX = 0;
int sourceY = 0;
int destX = 0;
int destY = 0;

// Create a bitmap object file from source file 
Bitmap sourceImage = new Bitmap(sourceFilePath);

// Set the source dimension to the variables 
int sourceWidth = sourceImage.Width;
int sourceHeight = sourceImage.Height;

// Calculate the percentage resize 
percentageResizeW = ((float)Width / (float)sourceWidth);
percentageResizeH = ((float)Height / (float)sourceHeight);

// Checking the resize percentage 
if (percentageResizeH < percentageResizeW) {
    percentageResize = percentageResizeW;
    destY = System.Convert.ToInt16((Height - (sourceHeight * percentageResize)) / 2);
} else {
    percentageResize = percentageResizeH;
    destX = System.Convert.ToInt16((Width - (sourceWidth * percentageResize)) / 2);
}

// Set the new cropped percentage image
int destWidth = (int)Math.Round(sourceWidth * percentageResize);
int destHeight = (int)Math.Round(sourceHeight * percentageResize);

// Create the image object 
using (Bitmap objBitmap = new Bitmap(Width, Height)) {
    objBitmap.SetResolution(sourceImage.HorizontalResolution, sourceImage.VerticalResolution);
    using (Graphics objGraphics = Graphics.FromImage(objBitmap)) {
        // Set the graphic format for better result cropping 
        objGraphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
        objGraphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
        objGraphics.DrawImage(sourceImage, new Rectangle(destX, destY, destWidth, destHeight), new Rectangle(sourceX, sourceY, sourceWidth, sourceHeight), GraphicsUnit.Pixel);

        // Save the file path, note we use png format to support png file 
        objBitmap.Save(saveFilePath, ImageFormat.Png);
        }
    }
}

通过使用以下代码调用上述CropImage方法：

CropImage(100, 100, "c://destinationimage.jpg", "c://newcroppedimage.jpg");

希望这个能对您有所帮助！