namespace IStation.Win
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{
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public static class ImageExtend
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{
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/// <summary>
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/// 将指定图片转化为指定尺寸,Image对象自带获取缩略图的方法GetThumbnailImage
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/// </summary>
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/// <param name="img"></param>
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/// <param name="width"></param>
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/// <param name="height"></param>
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/// <returns></returns>
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public static Image GetCustomizedImage(this Image img, int width, int height)
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{
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var bp = new Bitmap(width, height);
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//程序使用设备的DPI创建图片，所以代码注释
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//using (Graphics g = Graphics.FromHwnd(IntPtr.Zero))
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//{
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// float dpiX = g.DpiX;
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// float dpiY = g.DpiY;
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// bp.SetResolution((int)dpiX, (int)dpiY);
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//}
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using (Graphics g = Graphics.FromImage(bp))
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{
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Rectangle resultRectangle = new Rectangle(0, 0, width, height);
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Rectangle sourceRectangle = new Rectangle(0, 0, img.Width, img.Height);
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g.DrawImage(img, resultRectangle, sourceRectangle, GraphicsUnit.Pixel);
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}
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return bp;
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}
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}
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}
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