同时滚动两个列表框（Windows窗体）

debugcn 发表于 Dev

乔治·安东诺夫（Georgi Antonov）

基本上，我在Form（Windows窗体应用程序）上有两个列表框syncListView1和syncListView2，我试图使其滚动条同步

我已经用谷歌搜索了一些，我发现了这个类，但是它似乎不起作用：

 class SyncListBox : System.Windows.Forms.ListBox
    {
        [Category("Action")]
        private const int WM_HSCROLL = 0x114;
        private const int WM_VSCROLL = 0x115;
        public event ScrollEventHandler OnHorizontalScroll;
        public event ScrollEventHandler OnVerticalScroll;

        private const int SB_LINEUP = 0;
        private const int SB_LINELEFT = 0;
        private const int SB_LINEDOWN = 1;
        private const int SB_LINERIGHT = 1;
        private const int SB_PAGEUP = 2;
        private const int SB_PAGELEFT = 2;
        private const int SB_PAGEDOWN = 3;
        private const int SB_PAGERIGHT = 3;
        private const int SB_THUMBPOSITION = 4;
        private const int SB_THUMBTRACK = 5;
        private const int SB_PAGETOP = 6;
        private const int SB_LEFT = 6;
        private const int SB_PAGEBOTTOM = 7;
        private const int SB_RIGHT = 7;
        private const int SB_ENDSCROLL = 8;
        private const int SIF_TRACKPOS = 0x10;
        private const int SIF_RANGE = 0x1;
        private const int SIF_POS = 0x4;
        private const int SIF_PAGE = 0x2;
        private const int SIF_ALL = SIF_RANGE | SIF_PAGE | SIF_POS | SIF_TRACKPOS;
        [DllImport("user32.dll", SetLastError = true)]
        private static extern int GetScrollInfo(
        IntPtr hWnd, int n, ref ScrollInfoStruct lpScrollInfo);

        private struct ScrollInfoStruct
        {
            public int cbSize;
            public int fMask;
            public int nMin;
            public int nMax;
            public int nPage;
            public int nPos;
            public int nTrackPos;
        }
        protected override void WndProc(ref System.Windows.Forms.Message msg)
        {
            if (msg.Msg == WM_HSCROLL)
            {
                if (OnHorizontalScroll != null)
                {
                    ScrollInfoStruct si = new ScrollInfoStruct();
                    si.fMask = SIF_ALL;
                    si.cbSize = Marshal.SizeOf(si);
                    GetScrollInfo(msg.HWnd, 0, ref si);
                    if (msg.WParam.ToInt32() == SB_ENDSCROLL)
                    {
                        ScrollEventArgs sargs = new ScrollEventArgs(
                        ScrollEventType.EndScroll,
                        si.nPos);
                        OnHorizontalScroll(this, sargs);
                    }
                }
            }
            if (msg.Msg == WM_VSCROLL)
            {
                if (OnVerticalScroll != null)
                {
                    ScrollInfoStruct si = new ScrollInfoStruct();
                    si.fMask = SIF_ALL;
                    si.cbSize = Marshal.SizeOf(si);
                    GetScrollInfo(msg.HWnd, 0, ref si);
                    if (msg.WParam.ToInt32() == SB_ENDSCROLL)
                    {
                        ScrollEventArgs sargs = new ScrollEventArgs(
                        ScrollEventType.EndScroll,
                        si.nPos);
                        OnVerticalScroll(this, sargs);
                    }
                }
            }
            base.WndProc(ref msg);
        }

        private void InitializeComponent()
        {
            this.SuspendLayout();
            // 
            // scrolled
            // 
            this.Size = new System.Drawing.Size(120, 95);
            this.ResumeLayout(false);
        }
    }

并在后面的代码中：

private void syncListView2_OnVerticalScroll(object sender, ScrollEventArgs e)
        {
            syncListView1.TopIndex = syncListView2.TopIndex;
        }

        private void syncListView1_OnVerticalScroll(object sender, ScrollEventArgs e)
        {
            syncListView2.TopIndex = syncListView1.TopIndex;
        }

雷纳塔斯M.

从文章复制/粘贴代码，甚至不花时间阅读有关代码和用户评论的所有内容，这确实是一种不好的做法。您不是第一个被困在这个地方的人。...因为一个用户已经评论了该问题

因此，您可能错过的是订阅事件。有两个选项可以做到这一点：

在设计器窗口中，选择第一个列表框。然后在属性窗口中选择事件选项卡（1.），然后查找OnVerticalScroll事件。找到它后，单击下拉按钮（2.）。该列表应至少包含2个选项syncListView1_OnVerticalScroll和syncListView1_OnVerticalScroll。因此，选择syncListView1_OnVerticalScroll。使用第二个列表框执行相同的操作，但选择syncListView1_OnVerticalScrol2

在此处输入图片说明

在具有列表框的窗体中，打开代码视图。应该在InitializeComponent()调用方法的地方有构造函数。在该方法之后，添加以下代码行。

syncListView1.OnVerticalScroll + = this.syncListView1_OnVerticalScroll; syncListView2.OnVerticalScroll + = this.syncListView2_OnVerticalScroll;

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