一些C#实用的方法汇总

来源:转载

代码如下:

 1 /// <summary>

2 /// 过滤字符串方法,用于将单引号等特殊符号转化成中文符号

3 /// </summary>

4 /// <param name="msg">要转化的字符串</param>

5 public static string FilterStr(string msg)

6 {

7 string result = "";

8

9 // msg = msg.Replace(",", ",");

10 //msg = msg.Replace("<", "<");

11 //msg = msg.Replace(">", ">");

12 // msg = msg.Replace("\n", "<br>");

13 // msg = msg.Replace("\"", """);

14

15 msg = msg.Trim();

16 msg = msg.Replace("'", "''");

17

18 result = msg;

19

20 return result;

21 }

22

23

24 public static void message(string meg)

25 {

26

27 }

28

29 public static string FilterStrHtml(string msg)

30 {

31 string result = "";

32

33

34 msg = msg.Replace("\'", "'");

35 //msg = msg.Replace(",", ",");

36 msg = msg.Replace("\n", "<br>");

37 result = msg;

38

39 return result;

40 }

41

42 public static string FilterStrnocode(string msg)

43 {

44 string result = "";

45

46

47 msg = msg.Replace("'", "\'");

48 msg = msg.Replace("<br>", "\n");

49 result = msg;

50

51 return result;

52 }

53

54

55

56 //弹出消息框

57 /// <summary>

58 /// 消息提示框

59 /// </summary>

60 /// <param name="msg">消息内容</param>

61 public static void ShowMsgBox(string msg)

62 {

63 System.Web.HttpContext.Current.Response.Write("<script>alert('"+msg+"')</script>");

64 }

65

66 /// <summary>

67 /// 弹出消息框,调用弹出消息框,不影响样式buss.Showmessage(this.Page,"提交成功");

68 /// </summary>

69 /// <param name="Page">Page对像</param>

70 /// <param name="msg">消息</param>

71 public static void Showmessage(System.Web.UI.Page Page, string msg)

72 {

73 //ClientScript.RegisterStartupScript(GetType(), "JS1", "alert('" + msg + "')", true);

74 // Page.ClientScript.RegisterStartupScript(Page.GetType(), "JS1", "alert('" + msg + "')", true);

75 Page.ClientScript.RegisterStartupScript(Page.GetType(), "", " <script lanuage=javascript>alert('" + msg + "')</script>");

76 }

77

78 /// <summary>

79 /// 截取字符串

80 /// </summary>

81 /// <param name="msg">原字符串</param>

82 /// <param name="lenth">要截取的长度</param>

83 /// <returns></returns>

84 public static string ReturnStr(string msg, int lenth)

85 {

86 string result = msg;

87

88 if (msg.Length > lenth)

89 {

90 result = result.Substring(0, lenth);

91 }

92 // http://www.cnblogs.com/sosoft/

93 return result;

94

95 }

96 /// <summary>

97 ///

98 /// </summary>

99 /// <param name="sqlstr"></param>

100 /// <returns></returns>

101

102 /// <summary>

103 /// 剪切指定长度的字符串,并去掉HTML标记

104 /// </summary>

105 /// <param name="strr">要剪切字符串的Object形式</param>

106 /// <param name="len">长度(中文长度为2)</param>

107 /// <returns></returns>

108 public static string CutStringX(object strr, int len)

109 {

110 string str = strr.ToString();

111 string strRet = "";

112 char CH;

113 int nLen = str.Length;

114 int nCutLen = 0;

115 int nPos = 0;

116 int bLeft = 0;

117 int nChinese = 0;

118 while (nPos < nLen && nCutLen < len)

119 {

120 CH = str[nPos];

121 nPos++;

122

123 if (CH == '<')

124 {

125 bLeft++;

126 continue;

127 }

128 if (CH == '>')

129 {

130 bLeft--;

131 continue;

132 }

133 if (nCutLen == 0 && CH.ToString() == " " && CH.ToString() == "\n")

134 {

135 continue;

136 }

137 if (bLeft == 0)

138 {

139 //是否为中文

140 if (IsChinese(CH))

141 {

142 nCutLen += 2;

143 nChinese++;

144 }

145 else

146 {

147 nCutLen += 1;

148 }

149 strRet += CH;

150 }

151 }

152 strRet = strRet.Replace(" ", " ");

153 if (nPos < nLen)

154 {

155 strRet += "";

156 // strRet += "...";

157 }

158 return strRet;

159 }

160

161

162 //是否为中文

163 public static bool IsChinese(char ch)

164 {

165 ASCIIEncoding en = new ASCIIEncoding();

166 byte[] b = en.GetBytes(ch.ToString());

167 return (b[0] == 63);

168 }

169

170 //HTML标记转换

171 public static string HTMLEncode(string str)

172 {

173 str = str.Replace("<", "<");

174 str = str.Replace(">", ">");

175 str = str.Replace("\n", "<br/>");

176

177 return str;

178 }

179

180

181 /// <summary>

182 /// 把日期时间转换为日期,去掉时间

183 /// </summary>

184 /// <param name="str">格式:YYYY-MM-DD HH:MM:SS</param>

185 /// <returns>返回日期 YYYY-MM-DD</returns>

186 public static string GetDate(string str)

187 {

188 string[] s = str.Split(' ');

189 string[] ss = s[0].Split('-');

190 if (ss[1].Length < 2)

191 ss[1] = "0" + ss[1];

192 if (ss[2].Length < 2)

193 ss[2] = "0" + ss[2];

194 return ss[0] + "-" + ss[1] + "-" + ss[2];

195 }

196

197 //随机函数产生字符

198 public static string CreateRandomCode(int codeCount, string allChar)

199 {

200 //验证码中的出现的字符,避免了一些容易混淆的字符。

201 if (string.IsNullOrEmpty(allChar)) allChar = "3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,J,K,M,N,P,Q,R,S,T,U,W,X,Y";

202 string[] allCharArray = allChar.Split(',');

203 string randomCode = "";

204 int temp = -1;

205 bool breCreate = (codeCount < 6 && allCharArray.Length > 15);

206

207 Random rand = new Random();

208 for (int i = 0; i < codeCount; i++)

209 {

210 if (temp != -1)

211 {

212 rand = new Random(i * temp * ((int)DateTime.Now.Ticks));

213 }

214 int t = rand.Next(allCharArray.Length);

215 if (temp == t && breCreate)

216 {

217 return CreateRandomCode(codeCount, allChar);

218 }

219 temp = t;

220 randomCode += allCharArray[t];

221 }

222 return randomCode;

223 }

 


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