1
using System;
2using System.Data;
3using System.Configuration;
4using System.Web;
5using System.Web.Security;
6using System.Web.UI;
7using System.Web.UI.WebControls;
8using System.Web.UI.WebControls.WebParts;
9using System.Web.UI.HtmlControls;
10using System.IO;
11using System.Web.SessionState;
12using System.Xml;
13using System.Security;
14using System.Net;
15using System.Text.RegularExpressions;
16
/**//// <summary>
17
/// 黄建华（2007.9）
18/// 字符串的处理，字符的转换
19
/// </summary>
20public class StringUtil
21...{
22 public StringUtil()
23
...{
24 //
25 // TODO: 在此处添加构造函数逻辑
26 //
27
}
28 /**//// <summary>
29 /// 从字符串中的尾部删除指定的字符串
30 /// </summary>
31 /// <param name="sourceString"></param>
32 /// <param name="removedString"></param>
33 /// <returns></returns>
34 public static string Remove(string sourceString, string removedString)
35 ...{
36 try
37 ...{
38 if (sourceString.IndexOf(removedString) < 0)
39 throw new Exception("原字符串中不包含移除字符串！");
40 string result = sourceString;
41 int lengthOfSourceString = sourceString.Length;
42 int lengthOfRemovedString = removedString.Length;
43 int startIndex = lengthOfSourceString - lengthOfRemovedString;
44 string tempSubString = sourceString.Substring(startIndex);
45 if (tempSubString.ToUpper() == removedString.ToUpper())
46 ...{
47 result = sourceString.Remove(startIndex, lengthOfRemovedString);
48 }
49 return result;
50 }
51 catch
52 ...{
53 return sourceString;
54 }
55 }
56
57 /**//// <summary>
58 /// 获取拆分符右边的字符串
59 /// </summary>
60 /// <param name="sourceString"></param>
61 /// <param name="splitChar"></param>
62 /// <returns></returns>
63 public static string RightSplit(string sourceString, char splitChar)
64 ...{
65 string result = null;
66 string[] tempString = sourceString.Split(splitChar);
67 if (tempString.Length > 0)
68 ...{
69 result = tempString[tempString.Length - 1].ToString();
70 }
71 return result;
72 }
73
74 /**//// <summary>
75 /// 获取拆分符左边的字符串
76 /// </summary>
77 /// <param name="sourceString"></param>
78 /// <param name="splitChar"></param>
79 /// <returns></returns>
80 public static string LeftSplit(string sourceString, char splitChar)
81 ...{
82 string result = null;
83 string[] tempString = sourceString.Split(splitChar);
84 if (tempString.Length > 0)
85 ...{
86 result = tempString[0].ToString();
87 }
88 return result;
89 }
90
91 /**//// <summary>
92 /// 去掉最后一个逗号
93 /// </summary>
94 /// <param name="origin"></param>
95 /// <returns></returns>
96 public static string DelLastComma(string origin)
97 ...{
98 if (origin.IndexOf(",") == -1)
99 ...{
100 return origin;
101 }
102 return origin.Substring(0, origin.LastIndexOf(","));
103 }
104
105 /**//// <summary>
106 /// 删除不可见字符
107 /// </summary>
108 /// <param name="sourceString"></param>
109 /// <returns></returns>
110 public static string DeleteUnVisibleChar(string sourceString)
111 ...{
112 System.Text.StringBuilder sBuilder = new System.Text.StringBuilder(131);
113 for (int i = 0; i < sourceString.Length; i++)
114 ...{
115 int Unicode = sourceString[i];
116 if (Unicode >= 16)
117 ...{
118 sBuilder.Append(sourceString[i].ToString());
119 }
120 }
121 return sBuilder.ToString();
122 }
123
124 /**//// <summary>
125 /// 获取数组元素的合并字符串
126 /// </summary>
127 /// <param name="stringArray"></param>
128 /// <returns></returns>
129 public static string GetArrayString(string[] stringArray)
130 ...{
131 string totalString = null;
132 for (int i = 0; i < stringArray.Length; i++)
133 ...{
134 totalString = totalString + stringArray[i];
135 }
136 return totalString;
137 }
138
139 /**//// <summary>
140 /// 获取某一字符串在字符串数组中出现的次数
141 /// </summary>
142 /// <param name="stringArray" type="string[]">
143 /// <para>
144 ///
145 /// </para>
146 /// </param>
147 /// <param name="findString" type="string">
148 /// <para>
149 ///
150 /// </para>
151 /// </param>
152 /// <returns>
153 /// A int value...
154 /// </returns>
155 public static int GetStringCount(string[] stringArray, string findString)
156 ...{
157 int count = -1;
158 string totalString = GetArrayString(stringArray);
159 string subString = totalString;
160
161 while (subString.IndexOf(findString) >= 0)
162 ...{
163 subString = totalString.Substring(subString.IndexOf(findString));
164 count += 1;
165 }
166 return count;
167 }
168
169 /**//// <summary>
170 /// 获取某一字符串在字符串中出现的次数
171 /// </summary>
172 /// <param name="stringArray" type="string">
173 /// <para>
174 /// 原字符串
175 /// </para>
176 /// </param>
177 /// <param name="findString" type="string">
178 /// <para>
179 /// 匹配字符串
180 /// </para>
181 /// </param>
182 /// <returns>
183 /// 匹配字符串数量
184 /// </returns>
185 public static int GetStringCount(string sourceString, string findString)
186 ...{
187 int count = 0;
188 int findStringLength = findString.Length;
189 string subString = sourceString;
190
191 while (subString.IndexOf(findString) >= 0)
192 ...{
193 subString = subString.Substring(subString.IndexOf(findString) + findStringLength);
194 count += 1;
195 }
196 return count;
197 }
198
199 /**//// <summary>
200 /// 截取从startString开始到原字符串结尾的所有字符
201 /// </summary>
202 /// <param name="sourceString" type="string">
203 /// <para>
204 ///
205 /// </para>
206 /// </param>
207 /// <param name="startString" type="string">
208 /// <para>
209 ///
210 /// </para>
211 /// </param>
212 /// <returns>
213 /// A string value...
214 /// </returns>
215 public static string GetSubString(string sourceString, string startString)
216 ...{
217 try
218 ...{
219 int index = sourceString.ToUpper().IndexOf(startString);
220 if (index > 0)
221 ...{
222 return sourceString.Substring(index);
223 }
224 return sourceString;
225 }
226 catch
227 ...{
228 return "";
229 }
230 }
231
232 public static string GetSubString(string sourceString, string beginRemovedString, string endRemovedString)
233 ...{
234 try
235 ...{
236 if (sourceString.IndexOf(beginRemovedString) != 0)
237 beginRemovedString = "";
238
239 if (sourceString.LastIndexOf(endRemovedString, sourceString.Length - endRemovedString.Length) < 0)
240 endRemovedString = "";
241
242 int startIndex = beginRemovedString.Length;
243 int length = sourceString.Length - beginRemovedString.Length - endRemovedString.Length;
244 if (length > 0)
245 ...{
246 return sourceString.Substring(startIndex, length);
247 }
248 return sourceString;
249 }
250 catch
251 ...{
252 return sourceString; ;
253 }
254 }
255
256 /**//// <summary>
257 /// 按字节数取出字符串的长度
258 /// </summary>
259 /// <param name="strTmp">要计算的字符串</param>
260 /// <returns>字符串的字节数</returns>
261 public static int GetByteCount(string strTmp)
262 ...{
263 int intCharCount = 0;
264 for (int i = 0; i < strTmp.Length; i++)
265 ...{
266 if (System.Text.UTF8Encoding.UTF8.GetByteCount(strTmp.Substring(i, 1)) == 3)
267 ...{
268 intCharCount = intCharCount + 2;
269 }
270 else
271 ...{
272 intCharCount = intCharCount + 1;
273 }
274 }
275 return intCharCount;
276 }
277
278 /**//// <summary>
279 /// 按字节数要在字符串的位置
280 /// </summary>
281 /// <param name="intIns">字符串的位置</param>
282 /// <param name="strTmp">要计算的字符串</param>
283 /// <returns>字节的位置</returns>
284 public static int GetByteIndex(int intIns, string strTmp)
285 ...{
286 int intReIns = 0;
287 if (strTmp.Trim() == "")
288 ...{
289 return intIns;
290 }
291 for (int i = 0; i < strTmp.Length; i++)
292 ...{
293 if (System.Text.UTF8Encoding.UTF8.GetByteCount(strTmp.Substring(i, 1)) == 3)
294 ...{
295 intReIns = intReIns + 2;
296 }
297 else
298 ...{
299 intReIns = intReIns + 1;
300 }
301 if (intReIns >= intIns)
302 ...{
303 intReIns = i + 1;
304 break;
305 }
306 }
307 return intReIns;
308 }
309
310 /**//// <summary>
311 /// Method to make sure that user's inputs are not malicious
312 /// 截取输入最大的字符串
313 /// </summary>
314 /// <param name="text">User's Input</param>
315 /// <param name="maxLength">Maximum length of input</param>
316 /// <returns>The cleaned up version of the input</returns>
317 public static string InputText(string text, int maxLength)
318 ...{
319 text = text.Trim();
320 if (string.IsNullOrEmpty(text))
321 return string.Empty;
322 if (text.Length > maxLength)
323 text = text.Substring(0, maxLength);
324 text = Regex.Replace(text, "[\\s]{2,}", " "); //two or more spaces
325 text = Regex.Replace(text, "(<[b|B][r|R]/*>)+|(<[p|P](.|\\n)*?>)", "\n"); //<br>
326 text = Regex.Replace(text, "(\\s*&[n|N][b|B][s|S][p|P];\\s*)+", " "); //
327 text = Regex.Replace(text, "<(.|\\n)*?>", string.Empty); //any other tags
328 text = text.Replace("'", "''");
329 return text;
330 }
331
332 /**//// <summary>
333 /// Method to check whether input has other characters than numbers
334 /// 清楚字符
335 /// </summary>
336 public static string CleanNonWord(string text)
337 ...{
338 return Regex.Replace(text, "\\W", "");
339 }
340
341 //特殊字符的转换
342 public static string Encode(string str)
343 ...{
344
345 str = str.Replace("'", "＇");
346 str = str.Replace("\"", """);
347 str = str.Replace("<", "<");
348 str = str.Replace(">", ">");
349 return str;
350 }
351 public static string Decode(string str)
352 ...{
353
354 str = str.Replace(">", ">");
355 str = str.Replace("<", "<");
356 str = str.Replace(" ", " ");
357 str = str.Replace(""", "\"");
358 return str;
359 }
360 //字符传的转换 用在查询 登陆时 防止恶意的盗取密码
361 public static string TBCode(string strtb)
362 ...{
363 strtb = strtb.Replace("!", "");
364 strtb = strtb.Replace("@", "");
365 strtb = strtb.Replace("#", "");
366 strtb = strtb.Replace("$", "");
367 strtb = strtb.Replace("%", "");
368 strtb = strtb.Replace("^", "");
369 strtb = strtb.Replace("&", "");
370 strtb = strtb.Replace("*", "");
371 strtb = strtb.Replace("(", "");
372 strtb = strtb.Replace(")", "");
373 strtb = strtb.Replace("_", "");
374 strtb = strtb.Replace("+", "");
375 strtb = strtb.Replace("|", "");
376 strtb = strtb.Replace("?", "");
377 strtb = strtb.Replace("/", "");
378 strtb = strtb.Replace(".", "");
379 strtb = strtb.Replace(">", "");
380 strtb = strtb.Replace("<", "");
381 strtb = strtb.Replace("{", "");
382 strtb = strtb.Replace("}", "");
383 strtb = strtb.Replace("[", "");
384 strtb = strtb.Replace("]", "");
385 strtb = strtb.Replace("-", "");
386 strtb = strtb.Replace("=", "");
387 strtb = strtb.Replace(",", "");
388 return strtb;
389 }
390
391 //以javascript的windous.alert()方法输出提示信息
392 //strmsg 表示要输出的信息
393 //back 表示输出后是否要history.back()
394 //end 表示输出后是否要Response.End()
395 public static void WriteMessage(string strMsg, bool Back, bool End)
396 ...{
397 string js = "";
398 // Response = HttpContext.Current.Response;
399 //将单引号替换,防止js出错
400 strMsg = strMsg.Replace("'", "");
401 //将回车符号换掉,防止js出错
402 strMsg = strMsg.Replace("\r\n", "");
403 js="<script language=javascript>alert('" + strMsg + "')</script>";
404 if (Back)
405 ...{
406 js="<script language=javascript>history.back();</script)";
407 }
408 if (End)
409 ...{
410 js = "<script language=javascript>End</script)";
411 }
412 HttpContext.Current.Response.Write(js);
413 }
414
415 /**//// <summary>
416 /// 小函数，将字符串转换成float型，若字符串为空，返回0
417 /// </summary>
418 /// <param name="str">要转换的字符串</param>
419 /// <returns>转后的float值</returns>
420 public static float GetFloatValue(string str)
421 ...{
422 try
423 ...{
424 if (str.Length == 0)
425 return 0;
426 else
427 return float.Parse(str);
428 }
429 catch
430 ...{
431 WriteMessage("数据转换失败，请检查数据是否合理！", true, true);
432 return 0;
433 }
434 }
435 /**//// <summary>
436 /// 小函数，将字符串转换成int型，若字符串为空，返回0
437 /// </summary>
438 /// <param name="str">要转换的字符串</param>
439 /// <returns>转后的int值</returns>
440 public static int GetIntValue(string str)
441 ...{
442 try
443 ...{
444 if (str.Length == 0)
445 return 0;
446 else
447 ...{
448 if (Int32.Parse(str) == 0)
449 return 0;
450 else
451 return Int32.Parse(str);
452 }
453 }
454 catch
455 ...{
456 WriteMessage("数据转换失败，请检查数据是否合理！", true, true);
457 return 0;
458 }
459 }
460}
461
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