Question

我使用代码datagrid1.controls.add(frmnew)向datagridview添加了一个表单。问题是，该形式的控件的按键事件不会触发。请给我一个解决方案。

Answer 1

如果您使用的是Windows窗体：

检查.Designer.cs文件中是否有事件处理程序。

事件处理程序如下所示：

this.datagrid1.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.datagrid1_KeyPress);

Answer 2

如果要捕获datagridview控件内的keypress事件，则必须连接事件 EditingControlShowing 。以下是捕获按键事件并仅允许将数字数据输入datagridview单元格的示例。

    /// <summary>
    /// Occurs when a control for editing a cell is showing
    /// </summary>
    /// <remarks>Capture key press to handle key entry in datagridview</remarks>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void dgDCAL_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
    {
        dgDCAL.EditingControl.KeyPress -= EditingControl_KeyPress;
        dgDCAL.EditingControl.KeyPress += EditingControl_KeyPress;
    }

    /// <summary>
    /// Handle datagridview cell keypress event
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    void EditingControl_KeyPress(object sender, KeyPressEventArgs e)
    {
        // Only allow 0-9, backspace, period and return key
        if (!Char.IsNumber(e.KeyChar) && 
            (int)e.KeyChar != 8 &&
            (int)e.KeyChar != 46 &&
            (int)e.KeyChar != 13) e.Handled = true;
    }

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