Question

Im在视觉演播室工作,试图从一个数据GridView室获取信息,用户在两处点击。我基本上像任何其他浮雕事件一样,设立了小组会议,但似乎没有工作。

法典:

表格1.c

private void dataGridView1_CellDoubleClick(Object sender, DataGridViewCellEventArgs e)
    {

        System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
        messageBoxCS.AppendFormat("{0} = {1}", "ColumnIndex", e.ColumnIndex);
        messageBoxCS.AppendLine();
        messageBoxCS.AppendFormat("{0} = {1}", "RowIndex", e.RowIndex);
        messageBoxCS.AppendLine();
        MessageBox.Show(messageBoxCS.ToString(), "CellDoubleClick Event");
    }

表格1中的连续代码。

this.dataGridView1.CellDoubleClick += new System.EventHandler(this.dataGridView1_CellDoubleClick);

我在表1中看到了一个错误。设计者代码说,“没有超载数据GridView1_CellDoubleClick配对系统。活动Handler

How can I get the double click to work correctly? Thanks.

Answer 1

The CellDoubleClick event is a DataGridViewCellEventHandler, not an EventHandler`.

You should add the event handles using the designer, which will automatically use the correct delegate type.
You should not edit the designer-generated code manually.

In general, when adding event handlers, you shouldn t explicitly create the delegate.
Instead, you can write

myGrid.CellDoubleClick += MyGrid_CellDoubleClick;

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