正在编辑其值时访问Datagridview单元格值

Question

我有一个带有datagridview的表单,当用户开始为第一行中的第一个单元格输入值时,也可以按f2提交该值,但我无法访问单元格值,除非用户点击tab并转到另一个单元格

以下是我在f2命中时访问单元格值的代码

 protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
    {
        var key = new KeyEventArgs(keyData);

        ShortcutKey(this, key);

        return base.ProcessCmdKey(ref msg, keyData);
    }


    protected virtual void ShortcutKey(object sender, KeyEventArgs key)
    {
        switch (key.KeyCode)
        {
            case Keys.F2:
                MessageBox.Show(dataGridView1.SelectedCells[0].Value.ToString());
                break;
        }
    }

dataGridView1.SelectedCells [0] .Value返回null

Answer 1

如何做这样的事情呢.挂钩DataGridView的"EditingControlShowing"事件并在那里捕获F2.一些代码:

public partial class Form1 : Form
{
    private DataTable table;
    public Form1()
    {
        InitializeComponent();
        this.dataGridView1.EditingControlShowing += new DataGridViewEditingControlShowingEventHandler(HandleEditingControlShowing);
        this.table = new DataTable();
        table.Columns.Add("Column");
        table.Rows.Add("Row 1");
        this.dataGridView1.DataSource = table;
    }


    private void HandleEditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
    {
        var ctl = e.Control as DataGridViewTextBoxEditingControl;
        if (ctl == null)
        {
            return;
        }

        ctl.KeyDown -= ctl_KeyDown;
        ctl.KeyDown += new KeyEventHandler(ctl_KeyDown);

    }

    private void ctl_KeyDown(object sender, KeyEventArgs e)
    {
        var box = sender as TextBox;
        if (box == null)
        {
            return;
        }

        if (e.KeyCode == Keys.F2)
        {
            this.dataGridView1.EndEdit();
            MessageBox.Show(box.Text);
        }
    }

}

这个想法很简单,你可以加入EditingControlShowing事件.每次单元格进入编辑模式时,都会被触发.很酷的是,它暴露了实际的底层控件,你可以将它转换为实际的winforms控件,并像往常一样挂钩所有事件.