窗体的FormBorderStyle属性的不同效果

查看原文：http://blog.xieyc.com/form-border-style/

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	值	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：

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();
}

截图记录在此：

附：枚举源代码

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,
}
}