从孩子更改MDI父母的财产? [英] Change property on MDI parrent from child?

问题描述

你好，

我有以下三种形式:
frmMain，frmLogin和frmPanel.


当我运行程序时，它显示frmMain这是一个MDI容器，并在加载时以子级形式打开登录"表单.

现在，当我登录并且信息正确时，我需要启用toolstrip1上的按钮，这些按钮在加载时被禁用.

我尝试过的是在frmMain
中创建一个函数

Hello there,

I have three forms:
frmMain, frmLogin and frmPanel.


When I run my program it shows frmMain which is an MDI container, and on load I open Login form as child.

Now when I login and information is correct I need to enable buttons on my toolstrip1 which are disabled on load.

What I''ve tried is to make a function inside frmMain

void functionOnForm1()
{
    this.toolStripButton7.Enabled = true;
}

然后在密码确定后在登录表单上调用此函数:

then on login form after password is OK I call this function:

((frmMain)this.MdiParent).functionOnForm1();

但出现以下错误:
由于其保护级别(CS0122)，无法访问"Project1.frmMain.functionOnForm1()".

这是frmMain:

but I get the following error:
''Project1.frmMain.functionOnForm1()'' is inaccessible due to its protection level (CS0122).

This is frmMain:

public partial class frmMain  : Form
{
    public frmMain()
    {
        InitializeComponent();
    }

    void functionOnForm1()
    {
        MessageBox.Show("ddd");
    }
}

推荐答案

您有两种选择.

在frmMain中公开该方法，或者在frmLogin中沿 ^ ].

在MDI应用程序中，我通常更喜欢第一种(更简便的)方法.

You have two choices.

Either make the method in frmMain public, or raise an event in frmLogin along the lines of this[^].

In a MDI application I normally prefer the first (easier) approach.

请将您的代码放在代码块标签中.它使我们更轻松地阅读您的代码.

[添加]我已经代表OP DaveyM69编辑了问题. [/添加]

Please place your code in the code block tags. It makes it much easier for us to read your code.

[Added] I''ve edited the question on behalf of the OP, DaveyM69. [/Added]

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