TextBox.CharacterCasing 属性
重要
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获取或设置 TextBox 控件是否在字符键入时修改其大小写格式。
public:
property System::Windows::Forms::CharacterCasing CharacterCasing { System::Windows::Forms::CharacterCasing get(); void set(System::Windows::Forms::CharacterCasing value); };C#
public System.Windows.Forms.CharacterCasing CharacterCasing { get; set; }member this.CharacterCasing : System.Windows.Forms.CharacterCasing with get, setPublic Property CharacterCasing As CharacterCasingCharacterCasing 枚举值中的一个值，它指定 TextBox 控件是否修改字符的大小写格式。 默认值为 CharacterCasing.Normal。
分配给该属性的值不在该枚举的有效值范围内。
下面的代码示例创建一个 TextBox 用于接受密码的控件。 此示例使用 CharacterCasing 该属性将键入的所有字符更改为小写，并将 MaxLength 密码长度限制为 8 个字符的属性。 此示例还使用 TextAlign 属性在控件中 TextBox 居中设置密码。
public:
void CreateMyPasswordTextBox()
{
// Create an instance of the TextBox control.
TextBox^ textBox1 = gcnew 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;
}
C#
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;
}
Public Sub CreateMyPasswordTextBox()
' Create an instance of the TextBox control.
Dim textBox1 As 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 = "*"c
' 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
End Sub
可以使用此属性 CharacterCasing 根据应用程序的要求更改字符大小写。 例如，可以将控件中 TextBox 输入的所有字符的大小写更改为大写或小写，以强制实施密码策略。
| 产品 | 版本 |
|---|---|
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 |
| Windows Desktop | 3.0, 3.1, 5, 6, 7 |