其實和winform中的實現差不多，只是由于WPF中控件使用的庫與winform中的有區別，大體上還是差不多的，直接看代碼：

產生驗證碼的類：ValidCode.cs

public class ValidCode{#region Private Fieldsprivate const double PI = 3.1415926535897932384626433832795;private const double PI2 = 6.283185307179586476925286766559;//private readonly int _wordsLen = 4; private int _len;private CodeType _codetype;private readonly Single _jianju = (float)18.0;private readonly Single _height = (float)24.0;private string _checkCode;#endregion#region Public Propertypublic string CheckCode{get{return _checkCode;}}#endregion#region Constructors/// <summary> /// public constructors /// </summary> /// <param name="len"> 驗證碼長度 </param> /// <param name="ctype"> 驗證碼類型：字母、數字、字母+ 數字 </param> public ValidCode(int len, CodeType ctype){this._len = len;this._codetype = ctype;}#endregion#region Public Fieldpublic enum CodeType { Words, Numbers, Characters, Alphas }#endregion#region Private Methodsprivate string GenerateNumbers(){string strOut = "";System.Random random = new Random();for (int i = 0; i < _len; i++){string num = Convert.ToString(random.Next(10000) % 10);strOut += num;}return strOut.Trim();}private string GenerateCharacters(){string strOut = "";System.Random random = new Random();for (int i = 0; i < _len; i++){string num = Convert.ToString((char)(65 + random.Next(10000) % 26));strOut += num;}return strOut.Trim();}// private string GenerateAlphas(){string strOut = "";string num = "";System.Random random = new Random();for (int i = 0; i < _len; i++){if (random.Next(500) % 2 == 0){num = Convert.ToString(random.Next(10000) % 10);}else{num = Convert.ToString((char)(65 + random.Next(10000) % 26));}strOut += num;}return strOut.Trim();}private System.Drawing.Bitmap TwistImage(Bitmap srcBmp, bool bXDir, double dMultValue, double dPhase){System.Drawing.Bitmap destBmp = new Bitmap(srcBmp.Width, srcBmp.Height);// 將位圖背景填充為白色 System.Drawing.Graphics graph = System.Drawing.Graphics.FromImage(destBmp);graph.FillRectangle(new SolidBrush(System.Drawing.Color.White), 0, 0, destBmp.Width, destBmp.Height);graph.Dispose();double dBaseAxisLen = bXDir ? (double)destBmp.Height : (double)destBmp.Width;for (int i = 0; i < destBmp.Width; i++){for (int j = 0; j < destBmp.Height; j++){double dx = 0;dx = bXDir ? (PI2 * (double)j) / dBaseAxisLen : (PI2 * (double)i) / dBaseAxisLen;dx += dPhase;double dy = Math.Sin(dx);// 取得當前點的顏色 int nOldX = 0, nOldY = 0;nOldX = bXDir ? i + (int)(dy * dMultValue) : i;nOldY = bXDir ? j : j + (int)(dy * dMultValue);System.Drawing.Color color = srcBmp.GetPixel(i, j);if (nOldX >= 0 && nOldX < destBmp.Width&& nOldY >= 0 && nOldY < destBmp.Height){destBmp.SetPixel(nOldX, nOldY, color);}}}return destBmp;}#endregion#region Public Methodspublic Stream CreateCheckCodeImage(){string checkCode;switch (_codetype){case CodeType.Alphas:checkCode = GenerateAlphas();break;case CodeType.Numbers:checkCode = GenerateNumbers();break;case CodeType.Characters:checkCode = GenerateCharacters();break;default:checkCode = GenerateAlphas();break;}this._checkCode = checkCode;MemoryStream ms = null;// if (checkCode == null || checkCode.Trim() == String.Empty)return null;Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * _jianju)), (int)_height);Graphics g = Graphics.FromImage(image);try{Random random = new Random();g.Clear(Color.White);// 畫圖片的背景噪音線 for (int i = 0; i < 18; i++){int x1 = random.Next(image.Width);int x2 = random.Next(image.Width);int y1 = random.Next(image.Height);int y2 = random.Next(image.Height);g.DrawLine(new Pen(Color.FromArgb(random.Next()), 1), x1, y1, x2, y2);}Font font = new System.Drawing.Font("Times New Roman", 14, System.Drawing.FontStyle.Bold);LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);if (_codetype != CodeType.Words){for (int i = 0; i < checkCode.Length; i++){g.DrawString(checkCode.Substring(i, 1), font, brush, 2 + i * _jianju, 1);}}else{g.DrawString(checkCode, font, brush, 2, 2);}// 畫圖片的前景噪音點 for (int i = 0; i < 150; i++){int x = random.Next(image.Width);int y = random.Next(image.Height);image.SetPixel(x, y, Color.FromArgb(random.Next()));}// 畫圖片的波形濾鏡效果 if (_codetype != CodeType.Words){image = TwistImage(image, true, 3, 1);}// 畫圖片的邊框線 g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);ms = new System.IO.MemoryStream();image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);}finally{g.Dispose();image.Dispose();}return ms;}#endregion} View Code

窗體中的代碼：

//參數一：產生幾個字符的驗證碼圖片 參數二：驗證碼的形式(數字、字母、數字字母混合都有)ValidCode validCode = new ValidCode(5, ValidCode.CodeType.Alphas);this.image1.Source = BitmapFrame.Create(validCode.CreateCheckCodeImage());

其中image1是wpf中的圖片控件.

轉載于:https://www.cnblogs.com/tianguook/p/4142346.html

總結

以上是生活随笔為你收集整理的WPF中实现验证码功能的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。