Loading

textbox should take one comma only

textbox should take one comma only

Meghana B

4y1.1kWPF

I'm using my decimal Textbox like this:

When you put a comma in this field it stays like this 0, 00

And when he starts to write he writes like this 0.22,00

I'd like to take this, "00" right. I already tried to give TextBox.Text.Replace(",00","") but he keeps putting it.

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Uday Dodiya4y ago
In KeyPress event validate the input like following, it only accept decimal value
private void txtDecimal_KeyPress(object sender, KeyPressEventArgs e)
{
    if (!Char.IsDigit(e.KeyChar) && e.KeyChar != '\b' && e.KeyChar!='.')
    {
        e.Handled = true;
    }
    if (e.KeyChar == '.' && txtDecimal.Text.Contains("."))
    {
        e.Handled = true;
    }
}
-1
Rajanikant Hawaldar4y ago
It may be better to validate the value when entering text to avoid incorrect character input.
For this you should subscribe to the event PreviewTextInput :
<TextBox PreviewTextInput="PreviewTextInput" />
In method PreviewTextInput we validate the comma:
private void TextBox_PreviewTextInput(object sender, TextCompositionEventArgs e)
{
    bool approvedDecimalPoint = false;

    if (e.Text == ",")
    {
        if (!((TextBox)sender).Text.Contains(","))
            approvedDecimalPoint = true;
    }

    if (!(char.IsDigit(e.Text, e.Text.Length - 1) || approvedDecimalPoint))
        e.Handled = true;
}
+1