c# 操作字符串和图片.doc

c# 操作字符串和图片转载 C#类实现字符串的公共操作二字符串过滤 收藏using System;using System.Drawing;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Text.RegularExpressions;using System.IO;using System.Drawing.Imaging;using System.Text;using System.Web.Security;namespace WeYyzyq.Comp / / 对一些字符串进行操作的类 / public class StringUtil private static string passWord; /加密字符串 / / 判断输入是否数字 / / 要判断的字符串 / static public bool VldInt(string num) #region try Convert.ToInt32(num); return true; catch return false; #endregion / / 返回文本编辑器替换后的字符串 / / 要替换的字符串 / static public string GetHtmlEditReplace(string str) #region return str.Replace(, ).Replace( , ).Replace(, ，).Replace(%, ).Replace(script,).Replace(.js,); #endregion / / 截取字符串函数 / / 所要截取的字符串 / 截取字符串的长度 / static public string GetSubString(string str, int num) #region return (str.Length num) ? str.Substring(0, num) + . : str; #endregion / / 过滤输入信息 / / 内容 / 最大长度 / public static string InputText(string text, int maxLength) #region text = text.Trim(); if (string.IsNullOrEmpty(text) return string.Empty; if (text.Length maxLength) text = text.Substring(0, maxLength); text = Regex.Replace(text, s2, ); /two or more spaces text = Regex.Replace(text, ()+|(), n); / text = Regex.Replace(text, (s*&n|Nb|Bs|Sp|P;s*)+, ); /  text = Regex.Replace(text, , string.Empty); /any other tags text = text.Replace(, ); return text; #endregion / / 生成随机数 / / private string GenerateCheckCode() #region int number; char code; string checkCode = String.Empty; System.Random random = new Random(); for (int i = 0; i 5; i+) number = random.Next(); if (number % 2 = 0) code = (char)(0 + (char)(number % 10); else code = (char)(A + (char)(number % 26); checkCode += code.ToString(); HttpContext.Current.Response.Cookies.Add(new HttpCookie(CheckCode, checkCode); return checkCode; #endregion / / 生成验证码图片 / public void CreateCheckCodeImage() #region string checkCode = GenerateCheckCode(); if (checkCode = null | checkCode.Trim() = String.Empty) return; System.Drawing.Bitmap image = new System.Drawing.Bitmap(int)Math.Ceiling(checkCode.Length * 12.5), 22); Graphics g = Graphics.FromImage(image); try /生成随机生成器 Random random = new Random(); /清空图片背景色 g.Clear(Color.White); /画图片的背景噪音线 for (int i = 0; i 25; 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.Silver), x1, y1, x2, y2); Font font = new System.Drawing.Font(Arial, 12, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic); System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true); g.DrawString(checkCode, font, brush, 2, 2); /画图片的前景噪音点 for (int i = 0; i 100; i+) int x = random.Next(image.Width); int 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); System.IO.MemoryStream ms = new System.IO.MemoryStream(); image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif); HttpContext.Current.Response.ClearContent(); HttpContext.Current.Response.ContentType = image/Gif; HttpContext.Current.Response.BinaryWrite(ms.ToArray(); finally g.Dispose(); image.Dispose(); #endregion / / 获取汉字第一个拼音 / / / static public string getSpells(string input) #region int len = input.Length; string reVal = ; for (int i = 0; i 1) int area = (short)arrCN0; int pos = (short)arrCN1; int code = (area 8) + pos; int areacode = 45217, 45253, 45761, 46318, 46826, 47010, 47297, 47614, 48119, 48119, 49062, 49324, 49896, 50371, 50614, 50622, 50906, 51387, 51446, 52218, 52698, 52698, 52698, 52980, 53689, 54481 ; for (int i = 0; i 26; i+) int max = 55290; if (i != 25) max = areacodei + 1; if (areacodei = code & code max) return Encoding.Default.GetString(new byte (byte)(65 + i) ); return ?; else return cn; #endregion / / 半角转全角 / / / static public string GetQuanJiao(string BJstr) #region char c = BJstr.ToCharArray(); for (int i = 0; i c.Length; i+) byte b = System.Text.Encoding.Unicode.GetBytes(c, i, 1); if (b.Length = 2) if (b1 = 0) b0 = (byte)(b0 - 32); b1 = 255; ci = System.Text.Encoding.Unicode.GetChars(b)0; string strNew = new string(c); return strNew; #endregion / / 全角转半角 / / / static public string GetBanJiao(string QJstr) #region char c = QJstr.ToCharArray(); for (int i = 0; i c.Length; i+) byte b = System.Text.Encoding.Unicode.GetBytes(c, i, 1); if (b.Length = 2) if (b1 = 255) b0 = (byte)(b0 + 32); b1 = 0; ci = System.Text.Encoding.Unicode.GetChars(b)0; string strNew = new string(c); return strNew; #endregion #region 加密的类型 / / 加密的类型 / public enum PasswordType SHA1, MD5 #endregion / / 字符串加密 / / 要加密的字符串 / 要加密的类别 / static public string EncryptPassword(string PasswordString, string PasswordFormat) #region switch (PasswordFormat) case SHA1: passWord = F