asp.net(C#) 常用代码

1 using System;

2 using System.Web.Security;

3

4 /// <summary>

5 ///

6 /// ** asp.net(C#) 常用代码 **

7 ///

8 /// File: Common.cs

9 ///

10 /// Author: 周振兴 (Zxjay 飘遥)

11 ///

12 /// E-Mail: tda7264@163.com

13 ///

14 /// Date: 07-05-19

15 ///

16 /// http://www.cnblogs.com/zxjay

17 ///

18 /// </summary>

19 public class Common

20 {

21  private static string CurrentUser = string.Empty;

22

23  /// <summary>

24  /// ASP.NET 常用算法

25  /// </summary>

26  public Common()

27  {

28  }

29

30  /// <summary>

31  /// 获取或设置当前用户名称

32  /// </summary>

33  public static string GetCurrentUser

34  {

35  set { CurrentUser = value; }

36  get { return CurrentUser; }

37  }

38

39  /// <summary>

40  /// 限制字符串长度,清除特殊字符

41  /// </summary>

42  /// <param name="str"> 待处理的字符串 </param>

43  /// <param name="maxlength"> 最大长度 </param>

44  /// <returns> 处理后的字符串 </returns>

45  public static string ClearString(string str,int maxlength)

46  {

47  if (string.IsNullOrEmpty(str))

48  {

49  return string.Empty;

50  }

51  str=str.Trim();

52  if(str==string.Empty)

53  {

54  return string.Empty;

55  }

56  if(str.Length>maxlength)

57  {

58  str=str.Substring(0,maxlength);

59  }

60  str=str.Replace("'","''");

61  return str;

62  }

63

64  /// <summary>

65  /// 密码字符串散列加密( MD5算法 )

66  /// </summary>

67  /// <param name="inputstr"> 待加密的字符串 </param>

68  /// <returns> 加密后字符串 </returns>

69  public static string MD5(string inputstr)

70  {

71  return FormsAuthentication.HashPasswordForStoringInConfigFile

(inputstr, "MD5").ToLower().Substring(0, 15);

72  }

73

74  /// <summary>

75  /// 插入Flash或图像

76  /// </summary>

77  /// <param name="filename"> 媒体文件名称 </param>

78  /// <param name="width"> 宽度 </param>

79  /// <param name="height"> 高度 </param>

80  /// <returns> 能展示媒体的 HTML 代码 </returns>

81  public static string ShowMedia(string filename, int width, int height)

82  {

83  string fname = filename.Trim();

84  if (filename == string.Empty)

85  {

86  return string.Empty;

87  }

88

89  string fileext = fname.Substring(fname.LastIndexOf("."));

90  //flash文件

91  if (fileext.ToLower() == ".swf")

92  {

93  string swfObject = @"<object classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000'

codebase='http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0' width='" + width + @"' height='" + height + @"'>

94  <param name='movie' value='" + filename + @"' />

95  <param name='quality' value='high' />

96  <param name='wmode' value='transparent'>

97  <embed src='" + filename + @"' quality='high'

pluginspage='http://www.macromedia.com/go/getflashplayer' type='application/x-shockwave-flash'

width='" + width + @"' height='" + height + @"'></embed>

98  </object> ";

99  return swfObject;

100  }

101  //图像文件

102  else

103  {

104  string imgObject = @"<img alt='' width='" + width + @"px' height='" +

height + @"px' src='" + filename + @"' />";

105  return imgObject;

106  }

107  }

108

109  /// <summary>

110  /// 弹出提示框

111  /// </summary>

112  /// <param name="message"> 提示信息 </param>

113  /// <returns> 提示框的JS代码 </returns>

114  public static string ShowMessage(string message)

115  {

116  return "<script>alert('" + message + "');</script>";

117  }

118

119  /// <summary>

120  /// 弹出提示框并且重定向到另一链接

121  /// </summary>

122  /// <param name="message"> 提示信息 </param>

123  /// <param name="urlToRedirect"> 重定向到的链接 </param>

124  /// <returns> 提示框的JS代码 </returns>

125  public static string ShowMessageAndRedirect(string message, string urlToRedirect)

126  {

127  return "<script>alert('" + message + "');document.location.href='" +

urlToRedirect + "'</script>";

128  }

129

130  /// <summary>

131  /// 打开可调节大小的窗口

132  /// </summary>

133  /// <param name="url"> 待打开的链接 </param>

134  /// <param name="width"> 宽度 </param>

135  /// <param name="height"> 高度 </param>

136  /// <param name="locationX"> 距屏幕左端的距离 </param>

137  /// <param name="locationY"> 据屏幕上端的距离 </param>

138  /// <returns> 可调节大小的窗口JS代码 </returns>

139  public static string OpenResizableWindow(string url, int width, int height,

int locationX, int locationY)

140  {

141  string jsString = @"width={0}, height={1}, left={2}, top={3},location=no,

menubar=no, resizable=yes, scrollbars=yes, status=yes, titlebar=no, toolbar=no, directories=no";

142  return OpenWindow(url, string.Format(jsString, width, height, locationX, locationY));

143  }

144

145  /// <summary>

146  /// 打开固定大小的窗口

147  /// </summary>

148  /// <param name="url"> 待打开的链接 </param>

149  /// <param name="width"> 宽度 </param>

150  /// <param name="height"> 高度 </param>

151  /// <param name="locationX"> 距屏幕左端的距离 </param>

152  /// <param name="locationY"> 据屏幕上端的距离 </param>

153  /// <returns> 固定大小的窗口JS代码 </returns>

154  public static string OpenFixedWindow(string url, int width, int height,

int locationX, int locationY)

155  {

156  string jsString = @"width={0}, height={1}, left={2}, top={3},location=no,

menubar=no, resizable=no, scrollbars=no, status=no, titlebar=no, toolbar=no, directories=no";

157  return OpenWindow(url, string.Format(jsString, width, height, locationX, locationY));

158  }

159

160  /// <summary>

161  /// 打开窗口

162  /// </summary>

163  /// <param name="url"> 待打开的链接 </param>

164  /// <param name="sFeatures"> 定义窗口格式 </param>

165  /// <returns> 打开窗口的JS代码 </returns>

166  public static string OpenWindow(string url, string sFeatures)

167  {

168  string jsString = @"<script type='text/javascript'>" +

169  @"window.open('{0}','','{1}');"+

170  @"</script>";

171  return string.Format(jsString, url, sFeatures);

172  }

173

174  /// <summary>

175  /// 打开可调节大小的模态对话框

176  /// </summary>

177  /// <param name="url"> 待打开的链接 </param>

178  /// <param name="width"> 模态对话框宽度 </param>

179  /// <param name="height"> 模态对话框高度 </param>

180  /// <returns> 模态对话框的JS代码 </returns>

181  public static string ShowResizableModalDialog(string url, int width, int height)

182  {

183  string sFeatures = "dialogWidth:{0}px;dialogHeight:{1}px;center:yes;

resizable:yes;status:yes;scroll:yes;edge:sunken; ";

184  return ShowModalDialog(url, string.Format(sFeatures, width, height));

185  }

186

187  /// <summary>

188  /// 打开固定大小的模态对话框

189  /// </summary>

190  /// <param name="url"> 待打开的链接 </param>

191  /// <param name="width"> 模态对话框宽度 </param>

192  /// <param name="height"> 模态对话框高度 </param>

193  /// <returns> 模态对话框的JS代码 </returns>

194  public static string ShowFixedModalDialog(string url, int width, int height)

195  {

196  string sFeatures = "dialogWidth:{0}px;dialogHeight:{1}px;center:yes;

resizable:no;status:no;scroll:no;";

197  return ShowModalDialog(url, string.Format(sFeatures, width, height));

198  }

199

200  /// <summary>

201  /// 打开模式对话框

202  /// </summary>

203  /// <param name="url"> 待打开的链接 </param>

204  /// <param name="sFeatures"> 定义模态对话框格式 </param>

205  /// <returns> 模态对话框的JS代码 </returns>

206  public static string ShowModalDialog(string url, string sFeatures)

207  {

208  string jsString = @"<script type='text/javascript'>" +

209  @"showModalDialog('{0}','','{1}'" +

210  @"</script>";

211  return string.Format(jsString, url, sFeatures);

212  }

213

214

215 }

216