DataGridViewComboBoxColumn-访问ComboBox附加单击事件 [英] DataGridViewComboBoxColumn - access ComboBox to attach click event

问题描述

我想创建 DataGridViewComboBoxColumn 并附加到它的组合框 Click 事件（我想在其上生成它的数据源

I want to create DataGridViewComboBoxColumn and attach to it's combo box Click event (i want to generate it's datasource on click only).

推荐答案

虽然我不知道为什么需要 Click 该 ComboBox 控件的事件，
您可以使用 EditingControlShowing 事件访问该组合框：

While I have no idea about why you need Click event of that ComboBox control, you can access that combo box using EditingControlShowing event:

private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
    //Check if the event is for your column, for example column 1
    if (this.dataGridView1.CurrentCell.ColumnIndex == 1)
    {
        var comboBox = e.Control as DataGridViewComboBoxEditingControl;
        comboBox.Click -= comboBox_Click;
        comboBox.Click += comboBox_Click;
    }
}

private void comboBox_Click(object sender, EventArgs e)
{
    var comboBox = sender as DataGridViewComboBoxEditingControl;
    //use comboBox here
}

但是您应该知道，可以在datagridview的 CellClick 事件中也为您设置 DataSource 列：

But you should know, you can set the DataSource for you column in CellClick event of your datagridview too:

private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
    if(e.ColumnIndex==1 && e.RowIndex>-1)
    {
        //Check if the event is for your column, for example column 1
        var column = (DataGridViewComboBoxColumn)this.dataGridView1.Columns[e.ColumnIndex];
        //use column.DataSource   
    }
}

您应该知道的另一件事是，如果您设置的数据源不包含此列的一个单元格的值，则在呈现该列时会收到错误。

And another important thing you should know is if you set a datasource that not contains the value of one of cells of this column, you will receive errors while rendering the column.

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