TextBox.CharacterCasing Property


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Gets or sets whether the TextBox control modifies the case of characters as they are typed.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public CharacterCasing CharacterCasing { get; set; }

Property Value

Type: System.Windows.Forms.CharacterCasing

One of the CharacterCasing enumeration values that specifies whether the TextBox control modifies the case of characters. The default is CharacterCasing.Normal.

Exception Condition

A value that is not within the range of valid values for the enumeration was assigned to the property.

You can use the CharacterCasing property to change the case of characters as required by your application. For example, you could change the case of all characters entered in a TextBox control used for password entry to uppercase or lowercase to enforce a policy for passwords.

The following code example creates a TextBox control that is used to accept a password. This example uses the CharacterCasing property to change all characters typed to lowercase, and the MaxLength property to restrict the password length to eight characters. This example also uses the TextAlign property to center the password in the TextBox control.

public void CreateMyPasswordTextBox()
    // Create an instance of the TextBox control.
    TextBox textBox1 = new TextBox();
    // Set the maximum length of text in the control to eight.
    textBox1.MaxLength = 8;
    // Assign the asterisk to be the password character.
    textBox1.PasswordChar = '*';
    // Change all text entered to be lowercase.
    textBox1.CharacterCasing = CharacterCasing.Lower;
    // Align the text in the center of the TextBox control.
    textBox1.TextAlign = HorizontalAlignment.Center;

.NET Framework
Available since 1.1
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