C# wpf winfrom 控制文本框输入和黏贴数字

代码

   
     

    
      
    
      private
    
       
    
      void
    
       txtMachineCode_KeyDown(
    
      object
    
       sender, KeyEventArgs e)
 {
 TextBox txt 
    
      =
    
       sender 
    
      as
    
       TextBox;

 
    
      //
    
      屏蔽非法按键
    
      

    
       
    
      if
    
       ((e.Key 
    
      >=
    
       Key.NumPad0 
    
      &&
    
       e.Key 
    
      <=
    
       Key.NumPad9) 
    
      ||
    
       e.Key 
    
      ==
    
       Key.Decimal)
 {
 
    
      if
    
       (txt.Text.Contains(
    
      "
    
      .
    
      "
    
      ) 
    
      &&
    
       e.Key 
    
      ==
    
       Key.Decimal)
 {
 e.Handled 
    
      =
    
       
    
      true
    
      ;
 
    
      return
    
      ;
 }
 e.Handled 
    
      =
    
       
    
      false
    
      ;
 }
 
    
      else
    
       
    
      if
    
       (((e.Key 
    
      >=
    
       Key.D0 
    
      &&
    
       e.Key 
    
      <=
    
       Key.D9) 
    
      ||
    
       e.Key 
    
      ==
    
       Key.OemPeriod) 
    
      &&
    
       e.KeyboardDevice.Modifiers 
    
      !=
    
       ModifierKeys.Shift)
 {
 
    
      if
    
       (txt.Text.Contains(
    
      "
    
      .
    
      "
    
      ) 
    
      &&
    
       e.Key 
    
      ==
    
       Key.OemPeriod)
 {
 e.Handled 
    
      =
    
       
    
      true
    
      ;
 
    
      return
    
      ;
 }
 e.Handled 
    
      =
    
       
    
      false
    
      ;
 }
 
    
      else
    
      
 {
 e.Handled 
    
      =
    
       
    
      true
    
      ;
 }
 }
 
    
      private
    
       
    
      void
    
       txtMachineCode_TextChanged(
    
      object
    
       sender, TextChangedEventArgs e)
 {
 
    
      //
    
      屏蔽中文输入和非法字符粘贴输入
    
      

    
       TextBox textBox 
    
      =
    
       sender 
    
      as
    
       TextBox;
 TextChange[] change 
    
      =
    
       
    
      new
    
       TextChange[e.Changes.Count];
 e.Changes.CopyTo(change, 
    
      0
    
      );

 
    
      int
    
       offset 
    
      =
    
       change[
    
      0
    
      ].Offset;
 
    
      if
    
       (change[
    
      0
    
      ].AddedLength 
    
      >
    
       
    
      0
    
      )
 {
 
    
      double
    
       num 
    
      =
    
       
    
      0
    
      ;
 
    
      if
    
       (
    
      !
    
      Double.TryParse(textBox.Text, 
    
      out
    
       num))
 {
 textBox.Text 
    
      =
    
       textBox.Text.Remove(offset, change[
    
      0
    
      ].AddedLength);
 textBox.Select(offset, 
    
      0
    
      );
 }
 }
 }