C# MVC 验证码

最新推荐文章于 2022-06-10 01:18:54 发布

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最新推荐文章于 2022-06-10 01:18:54 发布 · 817 阅读

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#C# MVC验证码

1、复制下列代码，拷贝到控制器中。
 
#region  生成验证码图片
        // [OutputCache(Location = OutputCacheLocation.None, Duration = 0, NoStore = false)]
        public ActionResult SecurityCode()
        {

            string oldcode = Session["SecurityCode"] as string;
            string code = CreateRandomCode(5);
            Session["SecurityCode"] = code;
            return File(CreateValidateGraphic(code), "image/Jpeg");
        }


        private byte[] CreateImage(string checkCode)
        {
            int iwidth = (int)(checkCode.Length * 12);
            System.Drawing.Bitmap image = new System.Drawing.Bitmap(iwidth, 20);
            Graphics g = Graphics.FromImage(image);
            Font f = new System.Drawing.Font("Arial", 10, System.Drawing.FontStyle.Bold);
            Brush b = new System.Drawing.SolidBrush(Color.White);
            g.Clear(Color.Blue);
            g.DrawString(checkCode, f, b, 3, 3);
            Pen blackPen = new Pen(Color.Black, 0);
            Random rand = new