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yyzyqBBS/COMP/StringUtil.cs[10K，2009-6-12 12:01:01]，
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1
using System;
2using System.Drawing;
3using System.Web;
4using System.Web.UI;
5using System.Web.UI.WebControls;
6using System.Text.RegularExpressions;
7using System.IO;
8using System.Drawing.Imaging;
9using System.Text;
10using System.Web.Security;
11
12namespace WeYyzyq.Comp
13
...{
14
/**//// <summary>
15
/// 对一些字符串进行操作的类
16 /// 创建时间：2006-8-3
17 /// 创建者：马先光
18
/// </summary>
19 public class StringUtil
20 ...{
21 private static string passWord; //加密字符串
22
23 /**//// <summary>
24 /// 判断输入是否数字
25 /// </summary>
26 /// <param name="num">要判断的字符串</param>
27 /// <returns></returns>
28 static public bool VldInt(string num)
29 ...{
30 ...#region
31 try
32 ...{
33 Convert.ToInt32(num);
34 return true;
35 }
36 catch ...{ return false; }
37 #endregion
38 }
39
40 /**//// <summary>
41 /// 返回文本编辑器替换后的字符串
42 /// </summary>
43 /// <param name="str">要替换的字符串</param>
44 /// <returns></returns>
45 static public string GetHtmlEditReplace(string str)
46 ...{
47 ...#region
48 return str.Replace("'", "''").Replace(" ", " ").Replace(",", "，").Replace("%", "％").Replace("script","").Replace(".js","");
49 #endregion
50 }
51
52 /**//// <summary>
53 /// 截取字符串函数
54 /// </summary>
55 /// <param name="str">所要截取的字符串</param>
56 /// <param name="num">截取字符串的长度</param>
57 /// <returns></returns>
58 static public string GetSubString(string str, int num)
59 ...{
60 ...#region
61 return (str.Length > num) ? str.Substring(0, num) + "..." : str;
62 #endregion
63 }
64
65 /**//// <summary>
66 /// 过滤输入信息
67 /// </summary>
68 /// <param name="text">内容</param>
69 /// <param name="maxLength">最大长度</param>
70 /// <returns></returns>
71 public static string InputText(string text, int maxLength)
72 ...{
73 ...#region
74 text = text.Trim();
75 if (string.IsNullOrEmpty(text))
76 return string.Empty;
77 if (text.Length > maxLength)
78 text = text.Substring(0, maxLength);
79 text = Regex.Replace(text, "[\\s]{2,}", " "); //two or more spaces
80 text = Regex.Replace(text, "(<[b|B][r|R]/*>)+|(<[p|P](.|\\n)*?>)", "\n"); //<br>
81 text = Regex.Replace(text, "(\\s*&[n|N][b|B][s|S][p|P];\\s*)+", " "); //
82 text = Regex.Replace(text, "<(.|\\n)*?>", string.Empty); //any other tags
83 text = text.Replace("'", "''");
84 return text;
85 #endregion
86 }
87
88 /**//// <summary>
89 /// 生成随机数
90 /// </summary>
91 /// <returns></returns>
92 private string GenerateCheckCode()
93 ...{
94 ...#region
95 int number;
96 char code;
97 string checkCode = String.Empty;
98
99 System.Random random = new Random();
100
101 for (int i = 0; i < 5; i++)
102 ...{
103 number = random.Next();
104
105 if (number % 2 == 0)
106 code = (char)('0' + (char)(number % 10));
107 else
108 code = (char)('A' + (char)(number % 26));
109
110 checkCode += code.ToString();
111 }
112
113 HttpContext.Current.Response.Cookies.Add(new HttpCookie("CheckCode", checkCode));
114
115 return checkCode;
116 #endregion
117 }
118
119
120 /**//// <summary>
121 /// 生成验证码图片
122 /// </summary>
123 public void CreateCheckCodeImage()
124 ...{
125 ...#region
126 string checkCode = GenerateCheckCode();
127 if (checkCode == null || checkCode.Trim() == String.Empty)
128 return;
129
130 System.Drawing.Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * 12.5)), 22);
131 Graphics g = Graphics.FromImage(image);
132
133 try
134 ...{
135 //生成随机生成器
136 Random random = new Random();
137
138 //清空图片背景色
139 g.Clear(Color.White);
140
141 //画图片的背景噪音线
142 for (int i = 0; i < 25; i++)
143 ...{
144 int x1 = random.Next(image.Width);
145 int x2 = random.Next(image.Width);
146 int y1 = random.Next(image.Height);
147 int y2 = random.Next(image.Height);
148
149 g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
150 }
151
152 Font font = new System.Drawing.Font("Arial", 12, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic));
153 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);
154 g.DrawString(checkCode, font, brush, 2, 2);
155
156 //画图片的前景噪音点
157 for (int i = 0; i < 100; i++)
158 ...{
159 int x = random.Next(image.Width);
160 int y = random.Next(image.Height);
161
162 image.SetPixel(x, y, Color.FromArgb(random.Next()));
163 }
164
165 //画图片的边框线
166 g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);
167
168 System.IO.MemoryStream ms = new System.IO.MemoryStream();
169 image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
170 HttpContext.Current.Response.ClearContent();
171 HttpContext.Current.Response.ContentType = "image/Gif";
172 HttpContext.Current.Response.BinaryWrite(ms.ToArray());
173 }
174 finally
175 ...{
176 g.Dispose();
177 image.Dispose();
178 }
179 #endregion
180 }
181
182
183 /**//// <summary>
184 /// 获取汉字第一个拼音
185 /// </summary>
186 /// <param name="input"></param>
187 /// <returns></returns>
188 static public string getSpells(string input)
189 ...{
190 ...#region
191 int len = input.Length;
192 string reVal = "";
193 for (int i = 0; i < len; i++)
194 ...{
195 reVal += getSpell(input.Substring(i, 1));
196 }
197 return reVal;
198 #endregion
199 }
200
201 static public string getSpell(string cn)
202 ...{
203 ...#region
204 byte[] arrCN = Encoding.Default.GetBytes(cn);
205 if (arrCN.Length > 1)
206 ...{
207 int area = (short)arrCN[0];
208 int pos = (short)arrCN[1];
209 int code = (area << 8) + pos;
210 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 };
211 for (int i = 0; i < 26; i++)
212 ...{
213 int max = 55290;
214 if (i != 25) max = areacode[i + 1];
215 if (areacode[i] <= code && code < max)
216 ...{
217 return Encoding.Default.GetString(new byte[] ...{ (byte)(65 + i) });
218 }
219 }
220 return "?";
221 }
222 else return cn;
223 #endregion
224 }
225
226
227 /**//// <summary>
228 /// 半角转全角
229 /// </summary>
230 /// <param name="BJstr"></param>
231 /// <returns></returns>
232 static public string GetQuanJiao(string BJstr)
233 ...{
234 ...#region
235 char[] c = BJstr.ToCharArray();
236 for (int i = 0; i < c.Length; i++)
237 ...{
238 byte[] b = System.Text.Encoding.Unicode.GetBytes(c, i, 1);
239 if (b.Length == 2)
240 ...{
241 if (b[1] == 0)
242 ...{
243 b[0] = (byte)(b[0] - 32);
244 b[1] = 255;
245 c[i] = System.Text.Encoding.Unicode.GetChars(b)[0];
246 }
247 }
248 }
249
250 string strNew = new string(c);
251 return strNew;
252
253 #endregion
254 }
255
256 /**//// <summary>
257 /// 全角转半角
258 /// </summary>
259 /// <param name="QJstr"></param>
260 /// <returns></returns>
261 static public string GetBanJiao(string QJstr)
262 ...{
263 ...#region
264 char[] c = QJstr.ToCharArray();
265 for (int i = 0; i < c.Length; i++)
266 ...{
267 byte[] b = System.Text.Encoding.Unicode.GetBytes(c, i, 1);
268 if (b.Length == 2)
269 ...{
270 if (b[1] == 255)
271 ...{
272 b[0] = (byte)(b[0] + 32);
273 b[1] = 0;
274 c[i] = System.Text.Encoding.Unicode.GetChars(b)[0];
275 }
276 }
277 }
278 string strNew = new string(c);
279 return strNew;
280 #endregion
281 }
282
283 加密的类型#region 加密的类型
284 /**//// <summary>
285 /// 加密的类型
286 /// </summary>
287 public enum PasswordType
288 ...{
289 SHA1,
290 MD5
291 }
292 #endregion
293
294
295 /**//// <summary>
296 /// 字符串加密
297 /// </summary>
298 /// <param name="PasswordString">要加密的字符串</param>
299 /// <param name="PasswordFormat">要加密的类别</param>
300 /// <returns></returns>
301 static public string EncryptPassword(string PasswordString, string PasswordFormat)
302 ...{
303 ...#region
304 switch (PasswordFormat)
305 ...{
306 case "SHA1":
307 ...{
308 passWord = FormsAuthentication.HashPasswordForStoringInConfigFile(PasswordString, "SHA1");
309 break;
310 }
311 case "MD5":
312 ...{
313 passWord = FormsAuthentication.HashPasswordForStoringInConfigFile(PasswordString, "MD5");
314 break;
315 }
316 default:
317 ...{
318 passWord = string.Empty;
319 break;
320 }
321 }
322 return passWord;
323 #endregion
324 }
325
326 }
327
}
328
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