用ASP+制作图形 - 中国WEB开发者网络 (http://www.webasp.net) -- 技术教程 (http://www.webasp.net/article/) --- 用ASP+制作图形 (http://www.webasp.net/article/13/12569.htm)

-- 作者：未知 -- 发布日期： 2004-08-24

001 <% @Page Language="C#" %>002 <% @Import Namespace="System.Drawing" %>003 <% @Import Namespace="System.IO" %>004 <% @Import Namespace="System.Drawing.Imaging" % >005 <%006 Response.Expires = 0;007 Bitmap newBitmap = null;008 Graphics g = null ;009 010 string str2Render = Request.QueryString.Get("HitCount");011 if (null == str2Render) str2Render = "no count specified";012 string strFont = Request.QueryString.Get ("HitFontName");013 if (null == strFont) strFont = "Lucida Sans Unicode";014 015 int nFontSize = 12;016 try017 {018 nFontSize = Request.QueryString.Get("HitFontSize").ToInt32();019 }020 catch021 {022 // do nothing, just ignore023 }024 025 string strBackgroundColorname = Request.QueryString.Get("HitBackgroundColor");026 Color clrBackground = Color.White;027 try028 {029 // Format in the URL: %23xxXXxx030 if (null != strBackgroundColorname)031 clrBackground = ColorTranslator.FromHTML(strBackgroundColorname);032 }033 catch034 {035 }036 037 string strFontColorName = Request.QueryString.Get("HitFontColor");038 Color clrFont = Color.Black;039 try040 {041 // Format in the URL: % 23xxXXxx042 if (null != strFontColorName)043 clrFont = ColorTranslator.FromHTML (strFontColorName);044 }045 catch046 {047 }048 049 try 050 {051 Font fontCounter = new Font(strFont, nFontSize);052 053 // calculate size of the string.054 newBitmap = new Bitmap(1,1,PixelFormat.Format32bppARGB);055 g = Graphics.FromImage(newBitmap);056 SizeF stringSize = g.MeasureString(str2Render, fontCounter);057 int nWidth = (int) stringSize.Width;058 int nHeight = (int) stringSize.Height;059 g.Dispose();060 newBitmap.Dispose();061 062 newBitmap = new Bitmap(nWidth,nHeight,PixelFormat.Format32bppARGB);063 g = Graphics.FromImage(newBitmap);064 g.FillRectangle(new SolidBrush(clrBackground), new Rectangle(0,0,nWidth,nHeight));065 066 g.DrawString (str2Render, fontCounter, new SolidBrush(clrFont), 0, 0);067 068 MemoryStream tempStream = new MemoryStream();069 newBitmap.Save(tempStream,ImageFormat.PNG);070 071 Response.ClearContent();072 Response.ContentType = "image/png";073 Response.BinaryWrite (tempStream.ToArray());074 Response.End();075 // newBitmap.Save (Response.OutputStream, ImageFormat.PNG);076 // newBitmap.Save("o:\\TestApps\\TestServer\\test.png", ImageFormat.PNG) ;077 } 078 catch (Exception e) 079 {080 Response.Write(e.ToString());081 }082 finally 083 {084 if (null != g) g.Dispose();085 if (null != newBitmap) newBitmap.Dispose();086 }087 %>

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