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System.Drawing.Image originalImage = System.Drawing.Image.FromFile(imgPath);
//新建一个bmp图片
System.Drawing.Image bitmap = new System.Drawing.Bitmap(thumWidth, thumHeight);
//新建一个画板
System.Drawing.Graphics graphic = System.Drawing.Graphics.FromImage(bitmap);
//设置高质量查值法
graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
graphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//清空画布并以透明背景色填充
graphic.Clear(System.Drawing.Color.Transparent);
//在指定位置并且按指定大小绘制原图片的指定部分
graphic.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, thumWidth, thumHeight), new System.Drawing.Rectangle(x, y, originalWidth, originalHeight), System.Drawing.GraphicsUnit.Pixel);
//开始返回图片
System.IO.MemoryStream ms = new System.IO.MemoryStream();
bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
try
{
bitmap.Save(newname);
}
catch { }
originalImage.Dispose();
bitmap.Dispose();
graphic.Dispose();
public int Width {
set {
if(value < 300) {
m_Width = 300;
} else {
m_Width = value;
}
}
get {
return m_Width;
}
}
public int Height {
set {
if(value < 300) {
m_Height = 300;
} else {
m_Height = value;
}
}
get {
return m_Height;
}
}
private int m_Width = 640; //图像宽度
private int m_Height = 480; //图像高度
//初始化和填充图像区域,画出边框,初始标题
private void InitializeGraph() {
//根据给定的高度和宽度创建一个位图图像
objBitmap = new Bitmap(Width, Height);
}