Form 构造函数

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

初始化 Form 类的新实例。

C#

public Form ();

示例

以下示例创建一个新实例 Form ，并调用 ShowDialog 该方法以对话框形式显示窗体。 本示例将FormBorderStyle窗体的外观和StartPosition功能更改为对话框的 、AcceptButtonCancelButton、、MinimizeBox和MaximizeBox属性。 该示例还设置使用 Add 窗体 Controls 集合的方法添加两 Button 个控件。 该示例使用 HelpButton 属性在对话框的标题栏中显示帮助按钮。

C#

public void CreateMyForm()
{
   // Create a new instance of the form.
   Form form1 = new Form();
   // Create two buttons to use as the accept and cancel buttons.
   Button button1 = new Button ();
   Button button2 = new Button ();
  
   // Set the text of button1 to "OK".
   button1.Text = "OK";
   // Set the position of the button on the form.
   button1.Location = new Point (10, 10);
   // Set the text of button2 to "Cancel".
   button2.Text = "Cancel";
   // Set the position of the button based on the location of button1.
   button2.Location
      = new Point (button1.Left, button1.Height + button1.Top + 10);
   // Set the caption bar text of the form.   
   form1.Text = "My Dialog Box";
   // Display a help button on the form.
   form1.HelpButton = true;

   // Define the border style of the form to a dialog box.
   form1.FormBorderStyle = FormBorderStyle.FixedDialog;
   // Set the MaximizeBox to false to remove the maximize box.
   form1.MaximizeBox = false;
   // Set the MinimizeBox to false to remove the minimize box.
   form1.MinimizeBox = false;
   // Set the accept button of the form to button1.
   form1.AcceptButton = button1;
   // Set the cancel button of the form to button2.
   form1.CancelButton = button2;
   // Set the start position of the form to the center of the screen.
   form1.StartPosition = FormStartPosition.CenterScreen;
   
   // Add button1 to the form.
   form1.Controls.Add(button1);
   // Add button2 to the form.
   form1.Controls.Add(button2);
   
   // Display the form as a modal dialog box.
   form1.ShowDialog();
}

注解

窗体的默认大小为 300 像素，宽度为 300 像素。

适用于