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Masked TextBox In WPF
Description In this article I am going to show how we can create a masked textbox in wpf.   No. of Views     1350
  Rating     0
Author Rahul Saxena   Posted On     11 Jun 2011
Tags .NET 3.5,WPF    

Sample Code   Download Code

 

While taking input from the user it's very necessary that user should type input in correct datatype, mean if integer value required then user should type integer value and if string required then should type string. In WPF I am going to show how we can bound user to do that, by masking textbox.

This is my XAML code:
<Window x:Class="MaskedTextBoxInWPF.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        Title="Masked Text Box In WPF" Height="350" Width="525">

    <Grid>

        <TextBlock Height="23" HorizontalAlignment="Left" Margin="98,80,0,0" Name="textBlock1" Text="Enter Value:" VerticalAlignment="Top" />

        <TextBox Height="23" HorizontalAlignment="Left" Margin="184,80,0,0" Name="textBoxValue" PreviewTextInput="textBoxValue_PreviewTextInput" DataObject.Pasting="textBoxValue_Pasting" VerticalAlignment="Top" Width="120" />

    </Grid>

</Window>

 

Here I use 2 property of TextBox  PreviewTextInput="textBoxValue_PreviewTextInput" DataObject.Pasting="textBoxValue_Pasting". 

This is XAML.cs code:

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

 

namespace MaskedTextBoxInWPF

{

    /// <summary>

    /// Interaction logic for MainWindow.xaml

    /// </summary>

    public partial class MainWindow : Window

    {

        public MainWindow()

        {

            InitializeComponent();

        }

 

        private void textBoxValue_PreviewTextInput(object sender, TextCompositionEventArgs e)

        {

            e.Handled = !TextBoxTextAllowed(e.Text);

        }

 

        private void textBoxValue_Pasting(object sender, DataObjectPastingEventArgs e)

        {

            if (e.DataObject.GetDataPresent(typeof(String)))

            {

                String Text1 = (String)e.DataObject.GetData(typeof(String));

                if (!TextBoxTextAllowed(Text1)) e.CancelCommand();

            }

            else e.CancelCommand();

        }

 

        private Boolean TextBoxTextAllowed(String Text2)

        {

            return Array.TrueForAll<Char>(Text2.ToCharArray(),

                delegate(Char c) { return Char.IsDigit(c) || Char.IsControl(c); });

        }

 

    }

}

  

 

When run the application then:

 


If user try to type string value in this textbox then he/she can't type. Permission only to type int value.

 

About Author

About Author Rahul shows great interests in working with Microsoft technologies. He specializes in the implementation of DataBase & Graphics. His area of expertise includes: C#, ASP.NET,ADO.NET,Windows Forms & Web Services. He hails from background , Master's in Computer Application. With programming he loves photography, traveling and reading books. Rahul Saxena
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Country India
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