CommonFunction 中的方法 随机数字,验证 等
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
1 using System; 2 using System.Collections; 3 using System.Collections.Generic; 4 using System.Linq; 5 using System.Text; 6 using System.Text.RegularExpressions; 7 using System.Web; 8 using System.Data; 9 using System.Data.SqlClient; 10 using System.Web.UI; 11 using System.IO; 12 13 14 namespace TopWin.DongFengYL.SQLMemberShip.Utility 15 { 16 public class CommonFunction 17 { 18 /// <summary> 19 /// 截取字符串方法 20 /// </summary> 21 /// <param name="str"></param> 22 /// <param name="len"></param> 23 /// <param name="withToken"></param> 24 /// <returns></returns> 25 public static string SubStringByLength(ref string str, int len, bool withToken) 26 { 27 char[] charArray = str.ToCharArray(); 28 StringBuilder builder = new StringBuilder(len + 10); 29 int n = 0; 30 bool isCut = false; 31 int clen = charArray.Length; 32 for (int i = 0; i != clen; ++i) 33 { 34 if ((charArray[i] >= 0x4E00 && charArray[i] <= 0x9FA5) || (charArray[i] > 65280 && charArray[i] < 65375)) 35 { 36 n += 2; 37 if (n > len) 38 { 39 isCut = true; 40 break; 41 } 42 builder.Append(charArray[i]); 43 } 44 else 45 { 46 ++n; 47 if (n > len) 48 { 49 isCut = true; 50 break; 51 } 52 builder.Append(charArray[i]); 53 } 54 55 } 56 builder.Append(isCut ? withToken ? "..." : string.Empty : string.Empty); 57 return builder.ToString(); 58 } 59 60 /// <summary> 61 /// 替换HTML代码中图片的相对路径为绝对路径 62 /// </summary> 63 /// <param name="htmlValue">HTML代码</param> 64 /// <param name="absPath">绝对路径</param> 65 /// <returns></returns> 66 public static string ReplaceVirtualImgPath(string htmlValue, string absPath) 67 { 68 string regexp = "src=[\"']/"; 69 string token = Guid.NewGuid().ToString(); 70 string repString = System.Text.RegularExpressions.Regex.Replace(htmlValue, regexp, token); 71 MatchCollection mc = Regex.Matches(htmlValue, regexp, RegexOptions.Multiline | RegexOptions.IgnoreCase | RegexOptions.Compiled); 72 int offset1 = 0; 73 int offset2 = 0; 74 int len = repString.Length; 75 StringBuilder builder = new StringBuilder(15000); 76 IEnumerator iterator = mc.GetEnumerator(); 77 while (iterator.MoveNext()) 78 { 79 Match m = iterator.Current as Match; 80 offset2 = repString.IndexOf(token, offset1); 81 if (offset2 + token.Length > len) break; 82 string tempStr = repString.Substring(offset1, offset2 - offset1 + token.Length); 83 string url = Regex.Replace(m.Value, "/", absPath); 84 builder.Append(tempStr.Replace(token, url)); 85 offset1 = offset2 + token.Length; 86 } 87 88 if (offset1 < repString.Length) 89 { 90 builder.Append(repString.Substring(offset1, repString.Length - offset1)); 91 } 92 93 return builder.ToString(); 94 } 95 96 /// <summary> 97 /// 获取HTML代码中图片的路径 98 /// </summary> 99 /// <param name="htmlValue"></param> 100 /// <returns></returns> 101 public static ArrayList GetImgTagSrc(string htmlValue) 102 { 103 ArrayList resultList = new ArrayList(); 104 string regexp = @"<IMG[^>]+src=\s*(?:'(?<src>[^']+)'|""(?<src>[^""]+)""|(?<src>[^>\s]+))\s*[^>]*>"; 105 MatchCollection mc = Regex.Matches(htmlValue, regexp, RegexOptions.Multiline | RegexOptions.IgnoreCase | RegexOptions.Compiled); 106 foreach (Match m in mc) 107 { 108 resultList.Add(m.Groups["src"].Value.ToLower()); 109 } 110 if (resultList.Count == 0) 111 { 112 resultList.Add(string.Empty); 113 } 114 return resultList; 115 } 116 117 /// <summary> 118 /// 将包含HTML标记的字符串去掉HTML标记之后按指定长度截取 119 /// </summary> 120 /// <param name="original"></param> 121 /// <param name="length"></param> 122 /// <returns></returns> 123 public static string TrimString(string original, int length) 124 { 125 string str = string.Empty; 126 string tempStr = original; 127 System.Text.RegularExpressions.Regex reg = new System.Text.RegularExpressions.Regex("(<\\s*[a-zA-Z][^>]*>)|(</\\s*[a-zA-Z][^>]*>)|(\\s)", System.Text.RegularExpressions.RegexOptions.IgnoreCase); 128 if (original.Length > 0) 129 { 130 tempStr = reg.Replace(original, "").Trim(); 131 } 132 133 int sLen = tempStr.Length; 134 if (length == 0) 135 { 136 str = tempStr; 137 } 138 else 139 { 140 if (sLen <= length || sLen == length + 2 || sLen == length + 1) 141 { 142 str = tempStr; 143 } 144 else 145 { 146 str = tempStr.Substring(0, length) + "..."; 147 } 148 } 149 return str; 150 } 151 152 public static string ToHtmlLF(string input) 153 { 154 return input.Replace("\r\n", @"<br/>").Replace("\n", @"<br/>").Replace(" ", " "); 155 } 156 157 public static string GetGenGuid() 158 { 159 string genGuid = Guid.NewGuid().ToString().Replace("-", string.Empty); 160 return genGuid; 161 } 162 163 public static string GetCurWebUrl(string webUrl) 164 { 165 string[] stages = webUrl.Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries); 166 if (webUrl.IndexOf("http://", StringComparison.CurrentCultureIgnoreCase) == 0) 167 { 168 return stages[0] + "//" + stages[1] + "/" + stages[2]; 169 } 170 else 171 { 172 return stages[0] + "/" + stages[1]; 173 } 174 } 175 176 public static string GetFolderUrl(string serverRelationUrl) 177 { 178 string targetUrl = string.Empty; 179 string[] stages = serverRelationUrl.Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries); 180 targetUrl = serverRelationUrl.Substring(stages[0].Length + 1, serverRelationUrl.Length - (stages[0].Length + 1)); 181 return targetUrl; 182 } 183 184 public static string GetCurSiteUrl(string webUrl) 185 { 186 string[] stages = webUrl.Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries); 187 if (webUrl.IndexOf("http://", StringComparison.CurrentCultureIgnoreCase) == 0) 188 { 189 return stages[0] + "//" + stages[1]; 190 } 191 else 192 { 193 return stages[0]; 194 } 195 } 196 197 /// <summary> 198 /// 消息对话框alert 199 /// </summary> 200 /// <param name="page"></param> 201 /// <param name="message"></param> 202 public static void ShowMessage(Page page, string message) 203 { 204 page.ClientScript.RegisterStartupScript( 205 page.GetType(), 206 Guid.NewGuid().ToString(), 207 string.Format(@"<script language=javascript>alert(""{0}"");</script>", 208 message.Replace(@"""", "'").Replace("\r\n", @"\n").Replace("\n", @"\n").Replace("\\", 209 "\\\\"). 210 Replace(@"\\n", @"\n"))); 211 } 212 213 /// <summary> 214 /// 消息对话框 alert 215 /// </summary> 216 /// <param name="page"></param> 217 /// <param name="message"></param> 218 /// <param name="target"></param> 219 public static void ShowMessage(Page page, string message, string target) 220 { 221 page.ClientScript.RegisterStartupScript( 222 page.GetType(), 223 Guid.NewGuid().ToString(), 224 string.Format(@"<script language=javascript>alert(""{0}"");window.location.href=""{1}"";</script>", 225 message.Replace(@"""", "'").Replace("\r\n", @"\n").Replace("\n", @"\n").Replace("\\", 226 "\\\\"). 227 Replace(@"\\n", @"\n"), target)); 228 } 229 230 231 232 233 /// <summary> 234 /// 获取复杂性要求随机数 235 /// </summary> 236 /// <param name="VcodeNum"></param> 237 /// <returns></returns> 238 public static string RndNumADComplex(int VcodeNum) 239 { 240 string strValue = "!,$,#,%"; 241 string[] valueArray = strValue.Split(new char[] { ',' }); 242 Random rand = new Random(); 243 int t = rand.Next(4); 244 string strNum = RndNum(VcodeNum); 245 if (strNum.Length > 1) 246 { 247 strNum = strNum.Substring(0, strNum.Length - 1); 248 strNum = strNum + valueArray[t]; 249 } 250 return strNum; 251 } 252 253 /// <summary> 254 /// 获取随机数 255 /// </summary> 256 /// <param name="VcodeNum">随机数位数</param> 257 /// <returns></returns> 258 public static string RndNum(int VcodeNum) 259 { 260 string strValue = "0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z"; 261 string[] valueArray = strValue.Split(new char[] { ',' }); 262 string strNum = string.Empty; 263 int temp = -1; 264 265 Random rand = new Random(); 266 for (int i = 1; i < VcodeNum + 1; i++) 267 { 268 if (temp != -1) 269 { 270 rand = new Random(i * temp * unchecked((int)DateTime.Now.Ticks)); 271 } 272 int t = rand.Next(62); 273 if (temp != -1 && temp == t) 274 { 275 return RndNum(VcodeNum); 276 } 277 temp = t; 278 strNum += valueArray[t]; 279 } 280 return strNum; 281 } 282 283 /// <summary> 284 /// 获取图片中的第一张图片 285 /// </summary> 286 /// <param name="content">内容</param> 287 /// <returns></returns> 288 public static string GetFirstImgUrlFromContent(string content) 289 { 290 string imgUrl = string.Empty; 291 try 292 { 293 string str = @"<IMG[^>]+src=\s*(?:'(?<src>[^']+)'|""(?<src>[^""]+)""|(?<src>[^>\s]+))\s*[^>]*>"; 294 MatchCollection mc = Regex.Matches(content, str, RegexOptions.Multiline | RegexOptions.IgnoreCase | RegexOptions.Compiled); 295 if (mc.Count > 0) 296 { 297 imgUrl = mc[0].Groups["src"].Value.ToLower(); 298 } 299 } 300 catch 301 { 302 } 303 return imgUrl; 304 } 305 306 307 /// <summary> 308 /// 判断用户是否在预算管控组 309 /// </summary> 310 /// <returns></returns> 311 public bool UserIstrBudgetMan(string userAccount) 312 { 313 IDbConnection conn = Config.Instance.CreateDbConnection(); 314 conn.Open(); 315 316 SqlParameter[] aParms = new SqlParameter[] 317 { 318 new SqlParameter("@userAccount",userAccount) 319 }; 320 DataSet ds = DbHelper.ExecuteDataset(conn, CommandType.StoredProcedure, "sp_DY_UserIstrBudgetMan", aParms); 321 322 if (ds != null && ds.Tables[0].Rows.Count != 0) 323 return true; 324 else 325 return false; 326 } 327 /// <summary> 328 /// 判断文件是否存在,如果存在删除 329 /// </summary> 330 /// <param name="path"></param> 331 /// <returns></returns> 332 public static void IsExsiteDelFile(string path) 333 { 334 if (File.Exists(path)) 335 { 336 File.Delete(path); 337 } 338 } 339 public static string CreateDirectory(string path) 340 { 341 if (!Directory.Exists(path)) 342 { 343 Directory.CreateDirectory(path); 344 } 345 return path; 346 } 347 /// <summary> 348 /// 删除UserCopyImport文件夹中七天之前的文件 349 /// </summary> 350 /// <returns></returns> 351 public static void DeleteFilesForOverServeDays() 352 { 353 Config config = new Config(); 354 TimeSpan ts1 = new TimeSpan(DateTime.Now.Ticks); 355 string directoryPath = System.Web.HttpContext.Current.Server.MapPath(config.GetUserCopyImportPath()); 356 string overDays = config.GetUserCopyImportFilesOverDays(); 357 DirectoryInfo mydir = new DirectoryInfo(directoryPath); 358 foreach (FileSystemInfo fsi in mydir.GetFileSystemInfos()) 359 { 360 if (fsi is FileInfo) 361 { 362 FileInfo fi = (FileInfo)fsi; 363 DateTime dt = DateTime.ParseExact(fi.Name.ToString().Split('.')[0], "yyyyMMddHHmmss", System.Globalization.CultureInfo.CurrentCulture); 364 TimeSpan ts2 = new TimeSpan(dt.Ticks); 365 366 if (ts1.Subtract(ts2).Duration().Days >= Convert.ToInt32(overDays)) 367 { 368 fi.Delete(); 369 } 370 } 371 } 372 } 373 public static string GetNums() 374 { 375 string arr = "0,1,2,3,4,5,6,7,8,9"; 376 return GenerateRandomNumber(arr, 4); 377 } 378 public static string GetChars() 379 { 380 string arr = "A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z"; 381 return GenerateRandomNumber(arr, 3); 382 } 383 public static string GetSpecialChars() 384 { 385 string arr = "~,!,@,#,¥,%,&,*,(,),+,=,{,},|"; 386 return GenerateRandomNumber(arr, 1); 387 } 388 public static string GenerateRandomNumber(string content, int Length) 389 { 390 string[] constant = content.Split(','); 391 System.Text.StringBuilder newRandom = new System.Text.StringBuilder(8); 392 Random rd = new Random(); 393 for (int i = 0; i < Length; i++) 394 { 395 newRandom.Append(constant[rd.Next(constant.Length)]); 396 } 397 return newRandom.ToString(); 398 } 399 /// <summary> 400 /// 自动生成密码 401 /// </summary> 402 /// <returns></returns> 403 public static string GetPassword() 404 { 405 return GetNums() + GetChars() + GetSpecialChars(); 406 } 407 408 /// <summary> 409 /// 检查密码是否通过正则表达式验证 410 /// </summary> 411 public static bool IsMatchRight(string inValue,string reg) 412 { 413 string emailPattern = @"" + reg + ""; 414 bool match = Regex.IsMatch(inValue, emailPattern); 415 return match; 416 } 417 } 418 }