窗体的FormBorderStyle属性的不同效果

设置窗体边框可以通过设置窗体的FormBorderStyle属性设置。属性值可以通过枚举类型FormBorderStyle获取,它的取值和意义如下表所示。

属性

意义

FormBorderStyle.None

0

无边框
FormBorderStyle.FixedSingle

1

固定的单行边框
FormBorderStyle.Fixed3D

2

固定的三维样式边框
FormBorderStyle.FixedDialog

3

固定的对话框样式的粗边框
FormBorderStyle.Sizable

4

可调整大小的边框
FormBorderStyle.FixedToolWindow

5

不可调整大小的工具窗口边框
FormBorderStyle.SizableToolWindow

6

可调整大小的工具窗口边框

总是记不住这几个值是什么意义(虽然能够在设计器中观察到大概的外观),因此用下面一个方法遍历一下:

[code language=”csharp”]
private void btnChangeBorderStyle(object sender, EventArgs e)
{
if (this.FormBorderStyle == System.Windows.Forms.FormBorderStyle.SizableToolWindow)
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
else
this.FormBorderStyle++;
((Button)sender).Text = this.FormBorderStyle.ToString();
}
[/code]

截图记录在此:

附:枚举源代码

[code language=”csharp”]
namespace System.Windows.Forms
{
// Summary:
//     Specifies the border styles for a form.
[ComVisible(true)]
public enum FormBorderStyle
{
// Summary:
//     No border.
None = 0,
//
// Summary:
//     A fixed, single-line border.
FixedSingle = 1,
//
// Summary:
//     A fixed, three-dimensional border.
Fixed3D = 2,
//
// Summary:
//     A thick, fixed dialog-style border.
FixedDialog = 3,
//
// Summary:
//     A resizable border.
Sizable = 4,
//
// Summary:
//     A tool window border that is not resizable. A tool window does not appear
//     in the taskbar or in the window that appears when the user presses ALT+TAB.
//     Although forms that specify System.Windows.Forms.FormBorderStyle.FixedToolWindow
//     typically are not shown in the taskbar, you must also ensure that the System.Windows.Forms.Form.ShowInTaskbar
//     property is set to false, since its default value is true.
FixedToolWindow = 5,
//
// Summary:
//     A resizable tool window border. A tool window does not appear in the taskbar
//     or in the window that appears when the user presses ALT+TAB.
SizableToolWindow = 6,
}
}
[/code]

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