的WinForms之间传递变量 [英] Passing variable between winforms

问题描述

我有一个Windows.Forms的应用程序就代表有问题。

I have a problem concerning delegates in a Windows.Forms application.

有两种形式：

1. 的主要形式，其中有一个名为设置按钮。

1. the main form, which has a button named "Settings".

设置的形式，这是孩子的形式。

the "settings" form, this is the "child" form.

当我点击主窗体的设置按钮，打开设置窗体的实例。

When I click the "Settings" button in the main form, it opens an instance of the Settings form.

我的问题是，我需要一个变量传递给设置形式，当我打开它。因此，新的形式将显示可变文本。我不知道如何来检索子设置形式的信息。我这样做一个教程在线下，不能从本教程了解如何阅读的目标形式的信息。

My problem is that I need to pass a variable to the Settings form, when I open it. So that the new form will show the variable text. I don't know how to retrieve the information in the child "Settings" form. I did this by following a tutorial online and could not understand from the tutorial how to read the info in the destination form.

下面是我做了什么，到目前为止，code的主要形式有：

Here's what I've done so far, the code in the main form:

public partial class MainForm : Form
{

    /// <summary>
    /// delegate to send data between forms
    /// </summary>
    public delegate void PageInfoHandler(object sender, PageInfoEventArgs e);
    /// <summary>
    /// event of the delegate
    /// </summary>
    public event PageInfoHandler PageInfoRetrieved;


    //other stuff, events blabla

    private void toolStripBtnSettings_Click(object sender, EventArgs e)
    {
        PageInfoEventArgs args = new PageInfoEventArgs(SomeString);
        this.OnPageInfoRetrieved(args);

        SettingsForm settingsForm = new SettingsForm();
        settingsForm.ShowDialog();  
    }

    private void OnPageInfoRetrieved(PageInfoEventArgs args)
    {
        if (PageInfoRetrieved != null)
            PageInfoRetrieved(this, args);
    }
}

感谢你的任何想法。

最好的问候，

/安德烈·

推荐答案

传递任何信息，你要到的设置形式的构造函数，并提供存取方法，你需要离开那里的东西。

Pass any information you want to in to the constructor of Settings form, and provide accessor methods for things you need out of there.

public class SettingsForm : WinForm
{
    private string m_Data;
    private int m_nExample = 0;

    // ctor
    public SettingsForm(string _data)
    {
        m_Data = data;  // you can now use this in SettingsForm
    } // eo ctor

    public int Example {get{return(m_nExample);} }
} // eo class SettingsForm

在上面的榜样，你可以构造一个SettingForm一个字符串，并获得在一个整数它可以使用。在您的code：

In the above "example" you can construct a SettingForm with a string and get at an integer it may use. In your code:

private void toolStripBtnSettings_Click(object sender, EventArgs e)
{
    PageInfoEventArgs args = new PageInfoEventArgs(SomeString);
    this.OnPageInfoRetrieved(args);

    SettingsForm settingsForm = new SettingsForm("some data to pass");
    settingsForm.ShowDialog();  

    int result = settingsForm.Example; // retrieve integer that SettingsForm used
}

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