Upper Case TextBox

Introduction

In this Blog you will see how to create user control for upper case textbox

Step 1

Add class1.cs to your current project as UC_UpperCase_TextBox

Figure 1:Add Class

Step 2

Inherit this class with textbox like

public class UC_UpperCase_TextBox : TextBox

Step 3

Create TextChanged Event for this control

public UC_UpperCase_TextBox()
{
      this.TextChanged += new TextChangedEventHandler(UC_UpperCase_TextBox_TextChanged);
}

Step 4

Inside TextChanged event put code for convert text in Upper Case

void UC_UpperCase_TextBox_TextChanged(object sender, TextChangedEventArgs e)
{
    var tb = (TextBox) sender;
    var selectionStart = tb.SelectionStart;
    var selectionLength = tb.SelectionLength;
    tb.Text = tb.Text.ToUpper();
    tb.SelectionStart = selectionStart;
    tb.SelectionLength = selectionLength;
}

Your code will Look Like :



Figure 2: Code

Step 5

You can use it as a control in .xaml like:

<my2:UC_UpperCase_TextBox Grid.Row="1" Grid.Column="1" Margin="2,3" Height="23" Text="{Binding TITLE,Mode=TwoWay}" HorizontalAlignment="Stretch" VerticalAlignment="Center" x:Name="txt_Title" MaxLength="1024" />

It can be use in WPF and Silverlight Application to make it Upper case Letter in text box.