如何从DataGridView数据单元获得关键的keydown事件 [英] How to get keypressed, keydown events from DataGridView data cells

问题描述

我需要在 DataGridView 控件中的单元格编辑期间收到按键事件。

I need to receive the key press events during cell editing in DataGridView control.

从我所拥有的在网上找到 DataGridView 旨在将所有关键事件从 DataGridView 传递到单元格编辑控件，您无法获取这些事件很容易。

From what I have found on the net the DataGridView is designed to pass all key events from DataGridView to the cell editing control and you cannot get these events easily.

我发现这个一段代码，它们捕获 DataGrid 控件的这些事件，但是对于 DataGridView 不起作用。

I found this piece of code that traps those events for DataGrid control, but that does not work for DataGridView.

推荐答案

终于想出了。
这个难题有两个部分 - 从单元格编辑控件获取键，并从DataGridView本身获取键。这是我的代码要使用它，您只需订阅自定义事件： keyPressHook 。

class KeyPressAwareDataGridView : DataGridView
{

    protected override void OnControlAdded(ControlEventArgs e)
    {
        this.subscribeEvents(e.Control);
        base.OnControlAdded(e);
    }

    protected override void OnControlRemoved(ControlEventArgs e)
    {
        this.unsubscribeEvents(e.Control);
        base.OnControlRemoved(e);
    }

    protected override bool ProcessDataGridViewKey(KeyEventArgs e)
    {
        bool procesedInternally = false;

        if (this.keyPressHook != null)
        {
            this.keyPressHook(this, e);
            procesedInternally = e.SuppressKeyPress;
        }

        if (procesedInternally)
        {
            return true;
        }
        else
        {
            return base.ProcessDataGridViewKey(e);
        }
    }


    private void subscribeEvents(Control control)
    {
        control.KeyDown += new KeyEventHandler(this.control_KeyDown);
        control.ControlAdded += new ControlEventHandler(this.control_ControlAdded);
        control.ControlRemoved += new ControlEventHandler(this.control_ControlRemoved);

        foreach (Control innerControl in control.Controls)
        {
            this.subscribeEvents(innerControl);
        }
    }

    private void unsubscribeEvents(Control control)
    {
        control.KeyDown -= new KeyEventHandler(this.control_KeyDown);
        control.ControlAdded -= new ControlEventHandler(this.control_ControlAdded);
        control.ControlRemoved -= new ControlEventHandler(this.control_ControlRemoved);

        foreach (Control innerControl in control.Controls)
        {
            this.unsubscribeEvents(innerControl);
        }
    }

    private void control_ControlAdded(object sender, ControlEventArgs e)
    {
        this.subscribeEvents(e.Control);
    }

    private void control_ControlRemoved(object sender, ControlEventArgs e)
    {
        this.unsubscribeEvents(e.Control);
    }

    private void control_KeyDown(object sender, KeyEventArgs e)
    {
        if (this.keyPressHook != null)
        {
            this.keyPressHook(this, e);
        }
    }

    public event KeyEventHandler keyPressHook;

}

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