Form.Load 事件

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

Source:

Form.cs

在第一次显示窗体前发生。

C#

public event EventHandler? Load;

事件类型

EventHandler

示例

以下示例演示如何使用 SetDesktopLocation、 Load、 Activated和 Activate 成员。 若要运行该示例，请将以下代码粘贴到名为 的Form1窗体中，其中包含一Button1个名为 Button 和 的两Label个Label1Label2控件。

C#

static int x = 200;
static int y = 200;

private void Button1_Click(System.Object sender, 
    System.EventArgs e)
{
    // Create a new Form1 and set its Visible property to true.
    Form1 form2 = new Form1();
    form2.Visible = true;

    // Set the new form's desktop location so it  
    // appears below and to the right of the current form.
    form2.SetDesktopLocation(x, y);
    x += 30;
    y += 30;

    // Keep the current form active by calling the Activate
    // method.
    this.Activate();
    this.Button1.Enabled = false;
}

// Updates the label text to reflect the current values of x 
// and y, which was were incremented in the Button1 control's 
// click event.
private void Form1_Activated(object sender, System.EventArgs e)
{
    Label1.Text = "x: "+x+" y: "+y;
    Label2.Text = "Number of forms currently open: "+count;
}

static int count = 0;

private void Form1_Closed(object sender, System.EventArgs e)
{
    count -= 1;
}

private void Form1_Load(object sender, System.EventArgs e)
{
    count += 1;
}

注解

可以使用此事件执行分配表单使用的资源等任务。

有关处理事件的详细信息，请参阅 处理和引发事件。

适用于

另请参阅

• OnLoad(EventArgs)
• Close()