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/**//// <summary>
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/// 按比例縮放圖檔
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/// </summary>
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/// <param name="imgUrl">圖檔的路徑</param>
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/// <param name="imgHeight">圖檔的高度</param>
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/// <param name="imgWidth">圖檔的寬度</param>
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/// <returns></returns>
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public static string GetImageSize(string imgUrl,int imgHeight,int imgWidth)
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{
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string fileName = System.Web.HttpContext.Current.Server.MapPath(imgUrl);
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string strResult = string.Empty;
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if(System.IO.File.Exists(fileName) && imgHeight != 0 && imgWidth != 0)
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decimal desWidth;decimal desHeight; //目标寬高
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System.Drawing.Image objImage = System.Drawing.Image.FromFile(fileName);
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decimal radioAct = (decimal)objImage.Width/(decimal)objImage.Height; //原始圖檔的寬高比
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decimal radioLoc = (decimal)imgWidth/(decimal)imgHeight; //圖檔位的寬高比
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if(radioAct > radioLoc) //原始圖檔比圖檔位寬
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decimal dcmZoom = (decimal)imgWidth/(decimal)objImage.Width;
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desHeight = objImage.Height*dcmZoom;
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desWidth = imgWidth;
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}
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else
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decimal dcmZoom = (decimal)imgHeight/(decimal)objImage.Height;
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desWidth = objImage.Width*dcmZoom;
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desHeight = imgHeight;
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objImage.Dispose(); //釋放資源
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strResult = "width=\"" + Convert.ToString((int)desWidth) + "\" height=\""
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+ Convert.ToString((int)desHeight) + "\" ";
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return strResult;
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本文轉自高海東部落格園部落格，原文連結：http://www.cnblogs.com/ghd258/archive/2005/11/07/270447.html，如需轉載請自行聯系原作者