通过ListView ItemActivate更改标签文本 [英] Change Label Text via ListView ItemActivate

问题描述

我有2种形式:主表单和仅具有列表视图的第二种表单，用户可以在其中进行选择.双击激活listview项后，我希望主窗体上的标签显示已激活的项的文本.这是我的代码(不起作用)；为什么这是错误的?谢谢

I have 2 forms: a main form and a second form with only a listview in which users can make a selection. Once the listview item is activated with a double click, I want a label on the main form to display the text of the item that was activated. Here is my code (not working); why is this wrong? Thanks

主要形式:

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

    /* for populating the process list when the user clicks display process button */
    private void DisplayProcessButton_Click(object sender, EventArgs e)
    {
        Process_List plopen = new Process_List();
        plopen.Show();

        Process[] process = Process.GetProcesses();
        foreach (Process prs in process) 
        {
            plopen.listView1.Items.Add(prs.ProcessName);
        } 
    }

第二种形式:

private void listView1_ItemActivate(object sender, EventArgs e)
{
    MainForm mf = new MainForm();
    mf.label1.Text = e.ToString();
    Close();
}

推荐答案

这就是您应该做的！在第二张表格上，执行此操作

Here's what you should do! On your second form, do this

public MainForm parentForm;
public void SecondForm(MainForm form)
{
    InitializeComponent();
    parentForm = form;
}

然后...

private void listView1_ItemActivate(object sender, EventArgs e)
{
    parentForm.label1.Text = e.ToString();
}

然后以您的主要形式...

Then in your main form...

public SecondForm secondform;
public void MainForm()
{
    InitializeComponent();
    secondform = new SecondForm(this);
}

当您打开SecondForm时，可以在任何需要的地方使用它！

And when you open your SecondForm use this wherever you want!

secondform.Show();

这样做，您可以将信息表单传递给表单.我一直在使用我的每一种表格.这非常有用！如果您有任何疑问，请告诉我！

By doing this, you can transfer information form form to form back and forth. I use this all the time with every one of my forms. It's very very useful! If you have any questions please let me know!

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