在C＃中从子窗口访问父窗口中的控件

问题描述

我有一个主父窗口，其中包含一个按钮和一个文本框。
我还有另一个窗口子窗口，当我在文本框中输入一些文本并单击主窗口上的按钮时，该窗口将触发。现在，子窗口包含另一个文本框和一个按钮。我需要做的是在子窗口的文本框中输入一些文本，然后当我在子窗口上单击按钮时，父窗口的文本框应使用我从子窗口输入的文本进行更新。.
here是示例：

I have a main "parent" window contains a button and a textbox.I have another window "child" window which fires when I enter some text in the textbox and click the button on the main window. now the child window contains another textbox and a button. what I need to do is to enter some text in the textbox on child window then when I hit the button on the child window the textbox on parent window should get updated with the text I entered from the child window..here is the sample:

Form1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace childform
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Form2 tempDialog = new Form2(this);
            tempDialog.ShowDialog();
        }

        public void getText(string text)
        {
            textbox1.Text = text;
        }

    }
}

Form2。 cs

Form2.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace childform
{
    public partial class Form2 : Form
    {
        private Form1 m_parent;

        public Form2(Form1 frm1)
        {
            InitializeComponent();
            m_parent = frm1;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            m_parent.getText(textbox1.text);
        }
    }
}

任何想法？

推荐答案

1）在Form2中（子级）：
添加属性以获取写入的文本TextBox：

1) In Form2 (The child one):Add a property to get the text which wrote in the TextBox:

Public string TheText
{
     get { return textbox1.Text; }
}

并设置按钮 DialogResult 属性设置为 Ok 可以知道用户在关闭表单时按了Ok，而不是关闭按钮。

And set the button DialogResult property to Ok to know that the user press Ok when he closes the form, not the close button.

2）在Form1（父级）中：
检查用户是否按了确定按钮，然后从Form2中的theText属性中添加take值。

2) In Form1 (The parent):Check if the user pressed Ok button, add take the value from the property theText in Form2.

private void button1_Click(object sender, EventArgs e)
{
   Form2 tempDialog = new Form2();
   if (tempDialog.ShowDialog() == DialogResult.Ok)
      textbox1.Text = tempDialog.TheText;
}

祝你好运！

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