如何在不创建新对象的情况下获取表单控件 [英] How Can Get A Form Controls Without Making new Object Of It

问题描述

我面临的问题

What problem i am facing

public class MyController
      {
          public void Thread_ContinuousChecker()
          {
              Form1 f = new Form1();
//here i want to access the form controls without using new ,
//any suggestion?
//bcz when i use it goes to his original position(at start time position)
//but i want to store the control setting here.

              f.Hide();
              if (f.checkBox3.Checked)
              {
                  Thread th = new Thread(f.files);
                  th.Start();
              }

}
}
}

推荐答案

Windows窗体中的窗体被实例化为窗体的私有成员;这是你不应该忽略的事情，例如，将Designer.cs类中Control的定义设置为'Public。



所以，你可以只能通过以下方式获取表单实例中的控件实例：



1.您创建的公共属性在其托管表单中公开它们：

Controls on a Form, in Windows Forms, are instantiated as private members of the Form; that is something you should not over-ride by, for example, setting the definition of a Control in the Designer.cs Class to 'Public.

So, you can only "get at" the instances of Controls in the instance of a Form by:

1. Your creating public properties that expose them in their hosting Form:

public Form1()
{
    InitializeComponent();
    TheCheckBox = this.checkBox3;
}

// use this to access 'checkBox3 from "outside" the Form
public TheCheckBox { private set; get; }

2。深入到Form实例的Controls Collection并获取对它们的引用。

2. Your drilling-down into the Controls Collection of the Form instance and getting a reference to them.

CheckBox TheCheckBox = null;

var result = f.Controls.Find("checkBox3", searchAllChildren: true);

// note required cast here if search is successful ...
if (result.Length > 0) TheCheckBox = result[0] as CheckBox;

使用static成员。

MSDN [ ^ ]

static Form1 f;

Use "static" member.
MSDN[^]
static Form1 f;

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