开发技巧2

1、ASCII码值转换为字母

 

View Code

   
     

    
      private
    
       
    
      void
    
       button1_Click(
    
      object
    
       sender, EventArgs e)
 {
 
    
      try
    
      
 {
 
    
      if
    
       (textBox1.Text 
    
      ==
    
       
    
      ""
    
      )
 {
 MessageBox.Show(
    
      "
    
      ASCII码值不能为空
    
      "
    
      , 
    
      "
    
      信息
    
      "
    
      , MessageBoxButtons.OK, MessageBoxIcon.Information);
 textBox1.Focus();
 }
 
    
      else
    
      
 {
 
    
      byte
    
      [] array 
    
      =
    
       
    
      new
    
       
    
      byte
    
      [
    
      1
    
      ];
 array[
    
      0
    
      ] 
    
      =
    
       (
    
      byte
    
      )(Convert.ToInt32(textBox1.Text.Trim()));
 textBox2.Text 
    
      =
    
       Convert.ToString(System.Text.Encoding.ASCII.GetString(array));
 }
 }
 
    
      catch
    
      
 {
 MessageBox.Show(
    
      "
    
      请输入合法的ASCII码值
    
      "
    
      , 
    
      "
    
      信息
    
      "
    
      , MessageBoxButtons.OK, MessageBoxIcon.Information);
 textBox1.Text 
    
      =
    
       
    
      ""
    
      ;
 textBox1.Focus();
 }
 }
   
     

2去除字符串前后所有字符

View Code

   
     

    
       
    
      ///
    
       
    
      <summary>
    
      
 
    
      ///
    
       去除字符串前后的所有空白字符
 
    
      ///
    
       
    
      </summary>
    
      
 
    
      ///
    
       
    
      <param name="s"></param>
    
      
 
    
      ///
    
       
    
      <returns></returns>
    
      

    
       
    
      public
    
       
    
      static
    
       
    
      string
    
       trim(
    
      string
    
       s)
 {
 Regex regexToTrim 
    
      =
    
       
    
      new
    
       Regex(
    
      @"
    
      (^\s*)|(\s*$)
    
      "
    
      , RegexOptions.ECMAScript); 
    
      //
    
       C#: 匹配任何空白字符, 与 [ \f\n\r\t\v] 等效
    
      

    
       
    
      return
    
       regexToTrim.Replace(s, 
    
      ""
    
      );
 }