写一个含数字,拼音,汉字的验证码生成类_实用技巧_

 /// 
 /// 创建验证码 /// 
 /// 1：小写拼音 2：大写拼音 3：数字 4：汉字 ///  public static string CreateCode(string codeType = "1|2|3|4") { var code = string.Empty; try { if (string.IsNullOrWhiteSpace(codeType) || codeType.IndexOf('|') < 0) { codeType = "1|2|3|4"; } var codeTypeArr = codeType.Split(new char[] { '|' }, StringSplitOptions.RemoveEmptyEntries); var strLen = codeTypeArr.Length; //任务 Task[] taskArr = new Task[strLen]; for (int i = 0; i < strLen; i++) { var val = codeTypeArr[i]; switch (val) { case "1": //小写拼音 taskArr[i] = Task.Factory.StartNew(() => { return GetPinYinOrUpper(false); }); break; case "2": //大写拼音 taskArr[i] = Task.Factory.StartNew(() => { return GetPinYinOrUpper(); }); break; case "3": //数字 taskArr[i] = Task.Factory.StartNew(() => { return GetShuZi(); }); break; case "4": //汉字 taskArr[i] = Task.Factory.StartNew(() => { return GetHanZi(); }); break; default: break; } } //等待完成 30s Task.WaitAll(taskArr, TimeSpan.FromSeconds(30)); foreach (var item in taskArr) { code += item.Result; } } catch (Exception ex) { code = "我爱祖国"; } return code; } 

 /// 
 /// 生成验证码图片流 /// 
 /// 验证码文字 /// 流 public static byte[] CreateValidateCodeStream(string code = "我爱祖国", int fontSize = 18, int width = 0, int height = 0, string fontFamily = "华文楷体") { var bb = new byte[0]; //初始化画布 var padding = 2; var len = code.Length; width = width <= 0 ? fontSize * 2 * (len - 1) + padding * 4 : width; height = height <= 0 ? fontSize * 2 : height; var image = new Bitmap(width, height); var g = Graphics.FromImage(image); try { var random = new Random(); //清空背景色 g.Clear(Color.White); //画横向中间干扰线 var x1 = 0; var y1 = height / 2; var x2 = width; var y2 = y1; g.DrawLine(new Pen(Color.DarkRed), x1, y1, x2, y2); //字体 var font = new Font(fontFamily, fontSize, (FontStyle.Bold | FontStyle.Italic)); var brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1f, true); //画文字 var stringFomart = new StringFormat(); //垂直居中 stringFomart.LineAlignment = StringAlignment.Center; //水平居中 stringFomart.Alignment = StringAlignment.Center; var rf = new Rectangle(Point.Empty, new Size(width, height)); g.DrawString(code, font, brush, rf, stringFomart); //画图片的前景干扰点 for (int i = 0; i < 100; i++) { var x = random.Next(image.Width); var y = random.Next(image.Height); image.SetPixel(x, y, Color.FromArgb(random.Next())); } //画图片的边框线 g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1); //保存图片流 var stream = new MemoryStream(); image.Save(stream, ImageFormat.Jpeg); //输出图片流 bb = stream.ToArray(); } catch (Exception ex) { } finally { g.Dispose(); image.Dispose(); } return bb; } 

 var stringFomart = new StringFormat(); //垂直居中 stringFomart.LineAlignment = StringAlignment.Center; //水平居中 stringFomart.Alignment = StringAlignment.Center;

 //保存图片流 var stream = new MemoryStream(); image.Save(stream, ImageFormat.Jpeg); //输出图片流 bb = stream.ToArray();

 public FileResult GetValidateCode() { //返回的验证码文字 var code = string.Empty; var bb_code = ValidateCode.GetValidateCodeStream(ref code); return File(bb_code, "image/jpeg"); } public FileResult GetValidateCode01() { var code = string.Empty; var bb_code = ValidateCode.GetValidateCodeStream(ref code, "1|2|3|4"); return File(bb_code, "image/jpeg"); } public FileResult GetValidateCode02() { var code = string.Empty; var bb_code = ValidateCode.GetValidateCodeStream(ref code, "4|3|2|1"); return File(bb_code, "image/jpeg"); } public FileResult GetValidateCode03() { var code = string.Empty; var bb_code = ValidateCode.GetValidateCodeStream(ref code, "2|2|2|2"); return File(bb_code, "image/jpeg"); } public FileResult GetValidateCode04() { var code = string.Empty; var bb_code = ValidateCode.GetValidateCodeStream(ref code, "4|4|4|4"); return File(bb_code, "image/jpeg"); } public FileResult GetValidateCode05() { var code = string.Empty; var bb_code = ValidateCode.GetValidateCodeStream(ref code, "1|1|1|1"); return File(bb_code, "image/jpeg"); } 

神牛 - 验证码实例
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小写|大写|数字|汉字
汉字|数字|大写|小写
全部大写
全部汉字
全部小写

 @{ ViewBag.Title = "ValidtCode"; } 
神牛 - 验证码实例
全部随机
登 录
小写|大写|数字|汉字
汉字|数字|大写|小写
全部大写
全部汉字
全部小写

 public JsonResult UserLogin(string code) { var data = new Stage.Com.Extend.StageModel.MoData(); if (string.IsNullOrWhiteSpace(code)) { data.Msg = "验证码不能为空"; return Json(data); } var compareCode = Session["code"]; if (!compareCode.Equals(code)) { data.Msg = "验证码错误"; return Json(data); } data.IsOk = true; data.Msg = "验证码验证成功"; return Json(data); } public FileResult GetValidateCode() { //返回的验证码文字 var code = string.Empty; var bb_code = ValidateCode.GetValidateCodeStream(ref code); var key = "code"; if (Session[key] != null) { Session.Remove(key); } Session[key] = code; return File(bb_code, "image/jpeg"); }