下面的代码自定义了一个输入数字的textbox控件,我想如何能在输入111后自动在后面追加一个‘,’呢?注意是在输入完第三个1后自动追加。
下面的代码怎么修改?3KS
public class NumericTextBox : TextBox
{
bool allowSpace = false;
// Restricts the entry of characters to digits (including hex), the negative sign,
// the decimal point, and editing keystrokes (backspace).
protected override void OnKeyPress(KeyPressEventArgs e)
{
base.OnKeyPress(e);
NumberFormatInfo numberFormatInfo = System.Globalization.CultureInfo.CurrentCulture.NumberFormat;
string decimalSeparator = numberFormatInfo.NumberDecimalSeparator;
string groupSeparator = numberFormatInfo.NumberGroupSeparator;
string negativeSign = numberFormatInfo.NegativeSign;
string keyInput = e.KeyChar.ToString();
if (Char.IsDigit(e.KeyChar))
{
// Digits are OK
}
else if (keyInput.Equals(decimalSeparator) || keyInput.Equals(groupSeparator) ||
keyInput.Equals(negativeSign))
{
// Decimal separator is OK
}
else if (e.KeyChar == '\b')
{
// Backspace key is OK
}
// else if ((ModifierKeys & (Keys.Control | Keys.Alt)) != 0)
// {
// // Let the edit control handle control and alt key combinations
// }
else if (this.allowSpace && e.KeyChar == ' ')
{
}
else
{
// Swallow this invalid key and beep
e.Handled = true;
// MessageBeep();
}
}
public int IntValue
{
get
{
return Int32.Parse(this.Text);
}
}
public decimal DecimalValue
{
get
{
return Decimal.Parse(this.Text);
}
}
public bool AllowSpace
{
set
{
this.allowSpace = value;
}
get
{
return this.allowSpace;
}
}
}