Question

我有一个查看剪贴板的简单脚本。一旦它被更改，它会抛出一个事件，查看包含的文本并使用该文本填充数据网格。

事件工作正常并按预期检索文本，但是当我尝试向datagrid添加行时没有任何反应。有什么建议吗？

    public void ClipBoardHasChanged(ClipboardMonitor m, ClipboardChangedEventArgs e)
    {
        string clipBoardValue = (string)e.ClipboardChangedEventArgsT.GetData(DataFormats.StringFormat, true);
        this.dataGridView1.Rows.Add();
        this.dataGridView1.Rows[0].Cells[0].Value = clipBoardValue;
    }

剪贴板类

namespace MarketMatrixCorrelation
    {
        [DefaultEvent("ClipboardChanged")]
        public class ClipboardMonitor : Control
        {
            IntPtr nextClipboardViewer;

            [DllImport("User32.dll")]
            protected static extern int SetClipboardViewer(int hWndNewViewer);

            [DllImport("User32.dll", CharSet = CharSet.Auto)]
            public static extern bool ChangeClipboardChain(IntPtr hWndRemove, IntPtr hWndNewNext);

            [DllImport("user32.dll", CharSet = CharSet.Auto)]
            public static extern int SendMessage(IntPtr hwnd, int wMsg, IntPtr wParam, IntPtr lParam);

            public ClipboardMonitor()
            {
                this.BackColor = System.Drawing.Color.Red;
                this.Visible = false;

                nextClipboardViewer = (IntPtr)SetClipboardViewer((int)this.Handle);
            }

            /// <summary>
            /// Clipboard contents changed.
            /// </summary>
            public delegate void ClipboardChanged(ClipboardMonitor s, ClipboardChangedEventArgs e);
            public event ClipboardChanged ClipboardChangedT = delegate { };


            protected override void Dispose(bool disposing)
            {
                ChangeClipboardChain(this.Handle, nextClipboardViewer);
            }

            protected override void WndProc(ref System.Windows.Forms.Message m)
            {
                // defined in winuser.h
                const int WM_DRAWCLIPBOARD = 0x308;
                const int WM_CHANGECBCHAIN = 0x030D;

                switch (m.Msg)
                {
                    case WM_DRAWCLIPBOARD:
                        SendMessage(nextClipboardViewer, m.Msg, m.WParam, m.LParam);

                        OnClipboardChanged();
                        break;

                    case WM_CHANGECBCHAIN:
                        if (m.WParam == nextClipboardViewer)
                            nextClipboardViewer = m.LParam;
                        else
                            SendMessage(nextClipboardViewer, m.Msg, m.WParam, m.LParam);
                        break;

                    default:
                        base.WndProc(ref m);
                        break;
                }
            }

            //Catch when something is posted on the clipboard
            private void OnClipboardChanged()
            {
                try
                {
                    ClipboardChangedEventArgs iData = new ClipboardChangedEventArgs();
                    iData.ClipboardChangedEventArgsT = Clipboard.GetDataObject();

                    if (iData.ClipboardChangedEventArgsT.GetDataPresent(DataFormats.StringFormat))
                    {
                        ClipboardChangedT(this, iData);
                    }
                }
                catch (Exception e)
                {
                    MessageBox.Show(e.ToString());
                }
            }
        }

        public class ClipboardChangedEventArgs : EventArgs
        {
            private IDataObject DataObject;

            public IDataObject ClipboardChangedEventArgsT
            {
                set
                {
                    DataObject = value;
                }
                get
                {
                    return this.DataObject;
                }
            }
        }
}

Answer 1

只需将ClipBoardMonitor放入Form并将其粘贴到Form Load Event

中

private void Form1_Load(object sender, EventArgs e)
{
    this.clipboardMonitor1.ClipboardChangedT += (o, ex) =>
    {
        string clipBoardValue = (string)ex.ClipboardChangedEventArgsT.GetData(DataFormats.StringFormat, true);
        object[] row = { clipBoardValue };
        this.dataGridView1.Rows.Add(row);
    };
}

我无法从自定义事件访问datagrid

1 个答案: