KeyDown事件:
private void TextBox_KeyDown(object sender, System.Windows.Input.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;
}
}
TextChanged事件:
private void TextBox_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);
}
}
}
private void TextBox_KeyDown(object sender, System.Windows.Input.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;
}
}
TextChanged事件:
private void TextBox_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);
}
}
}
作者:wpf之家
本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。