怎样将图片上的地址去掉？

怎样将图片上的地址去掉？

C#中的实现方法 using System; using System.IO; using System.Drawing; using System.Drawing.Imaging; using System.Text; using System.Collections; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; public partial class GenerateCheckCode : System.Web.UI.Page ...{ protected void Page_Load(object sender, EventArgs e) ...{ string chkCode = string.Empty; //颜色列表，用于验证码、噪线、噪点 Color[] color =...{ Color.Black, Color.Red, Color.Blue, Color.Green, Color.Orange, Color.Brown, Color.Brown, Color.DarkBlue }; //字体列表，用于验证码 string[] font =...{ "Times New Roman", "MS Mincho", "Book Antiqua", "Gungsuh", "PMingLiU", "Impact" }; //验证码的字符集，去掉了一些容易混淆的字符 char[] character =...{ '2', '3', '4', '5', '6', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'R', 'S', 'T', 'W', 'X', 'Y' }; Random rnd = new Random(); //生成验证码字符串 for (int i = 0; i < 4; i++) ...{ chkCode += character[rnd.Next(character.Length)]; } Bitmap bmp = new Bitmap(100, 40); Graphics g = Graphics.FromImage(bmp); g.Clear(Color.White); //画噪线 for (int i = 0; i < 10; i++) ...{ int x1 = rnd.Next(100); int y1 = rnd.Next(40); int x2 = rnd.Next(100); int y2 = rnd.Next(40); Color clr = color[rnd.Next(color.Length)]; g.DrawLine(new Pen(clr), x1, y1, x2, y2); } //画验证码字符串 for (int i = 0; i < chkCode.Length; i++) ...{ string fnt = font[rnd.Next(font.Length)]; Font ft = new Font(fnt, 18); Color clr = color[rnd.Next(color.Length)]; g.DrawString(chkCode[i].ToString(), ft, new SolidBrush(clr), (float)i * 20 + 8, (float)8); } //画噪点 for (int i = 0; i < 100; i++) ...{ int x = rnd.Next(bmp.Width); int y = rnd.Next(bmp.Height); Color clr = color[rnd.Next(color.Length)]; bmp.SetPixel(x, y, clr); } //清除该页输出缓存，设置该页无缓存 Response.Buffer = true; Response.ExpiresAbsolute = System.DateTime.Now.AddMilliseconds(0); Response.Expires = 0; Response.CacheControl = "no-cache"; Response.AppendHeader("Pragma", "No-Cache"); //将验证码图片写入内存流，并将其以 "image/Png" 格式输出 MemoryStream ms = new MemoryStream(); try ...{ bmp.Save(ms, ImageFormat.Png); Response.ClearContent(); Response.ContentType = "image/Png"; Response.BinaryWrite(ms.ToArray()); } finally ...{ //显式释放资源 bmp.Dispose(); g.Dispose(); } } } 使用方法如下： 新建名为 GenerateCheckCode.aspx 的文件，将上述代码拷贝到代码文件 GenerateCheckCode.aspx.cs 在需要验证码的地方放置语句 <asp:Image ID="img1" runat="server" ImageUrl="~/GenerateCheckCode.aspx" /> 即可。