从另一个线程填充一个ListView [英] Populating a listview from another thread

问题描述

我想填充从另一个类列表视图，但我歌厅此错误：
跨线程操作无效：控制'ListView1的从比它创建线程以外的线程访问。在

I'm trying to populate a listview from another class, but I'm geting this error: " Cross-thread operation not valid: Control 'listView1' accessed from a thread other than the thread it was created on. "

在我的课堂我宣布我的列表视图是这样的：

In my class I declare my listview like this:

class CheckBlankPages
{

    public String[] pdfFiles
    { get; set; }

    ListView _ListVireRef;
    public int NrCRT = 1;


    public CheckBlankPages(String[] pdfFiles = null, ListView listView = null)
    {
        this.pdfFiles = pdfFiles;
        _ListVireRef = listView;

    }
    public void StartCheckingPDF()
    {
        foreach (string pdf in pdfFiles)
        {
            String[] itm = { (NrCRT++).ToString(), pdf };
            ListViewItem item = new ListViewItem(itm);
            _ListVireRef.Items.Add(item);
        }
    }
}

在我的MainForm我用这段代码：

and in my MainForm I use this code:

DialogResult rezultat = openFileDialog1.ShowDialog();
        if (rezultat == DialogResult.OK)
        {

            CheckBlankPages ck = new CheckBlankPages(openFileDialog1.FileNames, listView1);
            Thread CheckPDFs = new Thread(new ThreadStart(ck.StartCheckingPDF));
            CheckPDFs.Start();
        }

什么是错的？

What is wrong?

推荐答案

通常我做的是这样的：

using System;
using System.Windows.Forms;

namespace TestWinFormsThreding
{
    class TestFormCotrolHelper
    {
        delegate void UniversalVoidDelegate();

        /// <summary>
        /// Call form controll action from different thread
        /// </summary>
        public static void ControlInvike(Control control, Action function)
        {
            if (control.IsDisposed || control.Disposing)
                return;

            if (control.InvokeRequired)
            {
                control.Invoke(new UniversalVoidDelegate(() => ControlInvike(control, function)));
                return;
            }
            function();
        }
    }

    public partial class TestMainForm : Form
    {
    // ...
    // This will be called from thread not the same as MainForm thread
    private void TestFunction()
    {
        TestFormCotrolHelper.ControlInvike(listView1, () => listView1.Items.Add("Test"));
    }   
    //...
    }
}

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