C# 等待表单加载完成

Wait until form is finished loading

提问by Bennett Yeo

Is there some sort of boolean that I can use to check whether the instance of a form is loaded, or otherwise wait until the form is loaded?

是否有某种布尔值可以用来检查表单的实例是否已加载，或者等待表单加载？

for example:

例如：

While(form_loaded == false) {
  Try {
    //do something
  }
  catch {
  }//do try catch so code won't barf
}

I keep getting the following exception:

我不断收到以下异常：

A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll

An unhandled exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll

Additional information: Invokeor BeginInvokecannot be called on a control until the window handle has been created.

System.Windows.Forms.dll 中发生类型为“System.InvalidOperationException”的第一次机会异常

System.Windows.Forms.dll 中发生类型为“System.InvalidOperationException”的未处理异常

附加信息：Invoke或BeginInvoke在创建窗口句柄之前不能在控件上调用。

This is what I am worrying about.

这是我所担心的。

Additionally if a more detailed explanation is needed I can try to post some code and/or some more output debugging information.

此外，如果需要更详细的解释，我可以尝试发布一些代码和/或一些更多的输出调试信息。

采纳答案by BRAHIM Kamel

try to use the shown event something like this

尝试使用显示的事件是这样的

 public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        this.Shown += new System.EventHandler(this.Form1_Shown);
    }

    private void Form1_Shown(object sender, EventArgs e)
    {

    }
}

hope this help

希望这有帮助

回答by Henk Holterman

You have a Loadedand a Shownevent to pick from.

您有一个Loaded和一个Shown事件可供选择。

Windows is event driven so never wait for something in a loop.

Windows 是事件驱动的，所以永远不要在循环中等待某些东西。

回答by Avi Turner

The first event that is triggered after form is fully loaded is the Shownevent. use it...

表单完全加载后触发的第一个事件是Shown事件。用它...

---

---

According to MSDNthe event sequence is :

根据MSDN，事件序列是：

When application starts:

应用程序启动时：

• Control.HandleCreated
• Control.BindingContextChanged
• Form.Load
• Control.VisibleChanged
• Form.Activated
• Form.Shown

• Control.HandleCreated
• Control.BindingContextChanged
• 表单加载
• Control.VisibleChanged
• 表单激活
• 表格显示

When an application closes:

当应用程序关闭时：

• Form.Closing
• Form.FormClosing
• Form.Closed
• Form.FormClosed
• Form.Deactivate

• 收单
• Form.FormClosing
• 表格.关闭
• Form.FormClosed
• Form.Deactivate

And as @Henk Holterman stated in his answer, don't use busy waiting in an event driven form...

正如@Henk Holterman 在他的回答中所说，不要以事件驱动的形式使用忙等待......