简单的网页验证码实例
protectedvoidPage_Load(objectsender,EventArgse){VryImgGengen=newVryImgGen();stringverifyCode=gen.CreateVerifyCode(5,1);Session["VerifyCode"]=verifyCode.ToUpper();System.Drawing.Bitmapbitmap=gen.CreateImage(verifyCode);System.IO.MemoryStreamms=newSystem
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