从以编程方式添加多次的Usercontrol中访问控件？ [英] Access controls from a Usercontrol that is programmatically added more than once?

问题描述

我搜索了很多东西，却找不到任何地方的帮助。

Well I've search a lot, and can't find help anywhere.

我有一个带有标签的表格。当我单击按钮时，会添加一个新标签，并将用户控件添加到新标签。

I have a form with tabs. When I click a button, a new tab is added, and a usercontrol is added to the new tab.

我不知道如何访问第二个+标签。我可以从第一个选项卡访问用户控件，但不能访问其他控件。

I cannot figure out how to access the controls on the second + tabs. I can access the user controls just fine from the first tab.. just not the others.

这里是我到目前为止的代码。

Here is the code I had so far.

private void button1_Click(object sender, EventArgs e)
{
    string title = "tabPage " + (tabControl1.TabCount + 1).ToString();
    TabPage newPage = new TabPage(title);
    tabControl1.TabPages.Add(newPage);

    UserControl1 newTabControl = new UserControl1();
    newPage.Controls.Add(newTabControl);
}

private void button2_Click(object sender, EventArgs e)
{
    label1.Text = userControl1.textBox1.Text;
}

因此，当我单击一个按钮时，说2或3次，怎么做我可以从该选项卡的userControl中的textBox中获取文本吗？

So when I click button one, say 2 or 3 times, and how do I get the text from the textBox in the userControl from that tab?

...也许我正在处理所有错误？

...maybe I'm going about it all wrong?

推荐答案

您需要扩展TabPage并具有包含子对象的属性，例如：

You need to extend the TabPage and have properties that contain the child objects, for example:

public class ExtendedTabPage : TabPage
{
    public UserControl1 UserControl { get; private set; }

    public ExtendedTabPage(UserControl1 userControl)
    {
        UserControl = userControl;
        this.Controls.Add(userControl);
    }
}

然后，只要您仍然可以引用它。.像这样：

Then you can access it via .UserControl as long as you still have a reference to it.. like so:

ExtendedTabPage newTab = new ExtendedTabPage(new UserControl1());
tabControl1.TabPages.Add(newTab);

newTab.UserControl.textBox1.Text = "New Tab User Control TextBox";

您还必须进入UserControl设计器文件，并将文本框声明从private更改为public。

You will also have to go into the UserControl designer file and change the textbox declaration from private to public.

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