How to set a type for inputs wpf?-CodePudding

I have a input and I want it to accept only the data type I want like string or double. Is there any way I can do it programmatically?

I tried

TextBox text = new TextBox();
text.Type = 'numberic'; // an input that only accepts int.
text.Type = 'double';//or like this.

My app is dynamic so I want it to s.th like this . More general for all data types. but it didn't work. I used to say type in html but here I don't know if there is way to do it or not in wpf?

CodePudding user response：

you can add on textChanged event to the text box and then handle the data changed

follow this example:

TextBox textBox = new TextBox();
textBox.TextChanged  = TextBox_TextChanged;

For int datatype:

private void TextBox_TextChanged(object sender, TextChangedEventArgs e)
    {
        TextBox textBox = sender as TextBox;
        int iValue = -1;

        if (Int32.TryParse(textBox.Text, out iValue) == false)
        {
            TextChange textChange = e.Changes.ElementAt<TextChange>(0);
            int iAddedLength = textChange.AddedLength;
            int iOffset = textChange.Offset;
            textBox.Text = textBox.Text.Remove(iOffset, iAddedLength);
            textBox.Select(textBox.Text.Length, textBox.Text.Length);
        }
    }

in the case you want another number datatype just change ivalue to float or double etc..

and then use float.tryparse or double.tryparse

I hope this can help.