【转】 C# DataGridView 右击事件

DGV上的鼠标事件，MouseDown 、MouseUp、CellMouseClick等事件可参考。
if (MouseButtons == MouseButtons.Right)
     MessageBox.Show("OK");

// DataGridView 的 ContextMenuStrip 设定
DataGridView1.ContextMenuStrip = this.ContextMenuStrip1;

// 列的 ContextMenuStrip 设定
DataGridView1.Columns[0].ContextMenuStrip = this.ContextMenuStrip2;
// 列头的 ContextMenuStrip 设定
DataGridView1.Columns[0].HeaderCell.ContextMenuStrip = this.ContextMenuStrip2;

// 行的 ContextMenuStrip 设定
DataGridView1.Rows[0].ContextMenuStrip = this.ContextMenuStrip3;

// 单元格的 ContextMenuStrip 设定
DataGridView1[0, 0].ContextMenuStrip = this.ContextMenuStrip4;
对于单元格上的右键菜单的设定，优先顺序是：　Cell > Row > Column > DataGridView
? CellContextMenuStripNeeded、RowContextMenuStripNeeded　事件
利用　CellContextMenuStripNeeded　事件可以设定单元格的右键菜单，尤其但需要右键菜单根据单元格值的变化而变化的时候。比起使用循环遍历，使用该事件来设定右键菜单的效率更高。但是，在DataGridView使用了DataSource绑定而且是VirtualMode的时候，该事件将不被引发。

//　CellContextMenuStripNeeded事件处理方法
private void DataGridView1_CellContextMenuStripNeeded(object sender,
         DataGridViewCellContextMenuStripNeededEventArgs e)
{
     DataGridView dgv = (DataGridView)sender;
    if (e.RowIndex < 0)
     {
        //　列头的ContextMenuStrip设定
         e.ContextMenuStrip = this.ContextMenuStrip1;
     }
    else if (e.ColumnIndex < 0)
     {
        //　行头的ContextMenuStrip设定
         e.ContextMenuStrip = this.ContextMenuStrip2;
     }
    else if (dgv[e.ColumnIndex, e.RowIndex].Value is int)
     {
        //　如果单元格值是整数时
         e.ContextMenuStrip = this.ContextMenuStrip3;
     }
}
//同样，可以通过　RowContextMenuStripNeeded　事件来设定行的右键菜单。

//　RowContextMenuStripNeeded事件处理方法
private void DataGridView1_RowContextMenuStripNeeded(object sender,
         DataGridViewRowContextMenuStripNeededEventArgs e)
{
     DataGridView dgv = (DataGridView)sender;
    //　当"Column1"列是Bool型且为True时、设定其的ContextMenuStrip
     object boolVal = dgv["Column1", e.RowIndex].Value;
     Console.WriteLine(boolVal);
    if (boolVal is bool && (bool)boolVal)
     {
         e.ContextMenuStrip = this.ContextMenuStrip1;
     }
}

//CellContextMenuStripNeeded　事件处理方法的参数中、「e.ColumnIndex=-1」表示行头、「e.RowIndex=-1」表示列头。RowContextMenuStripNeeded则不存在「e.RowIndex=-1」的情况。

//引用地址 http://qianshao.blog.51cto.com/935360/201791



//How do you select a datagridview row on a right-click?

// Clear all the previously selected rows
foreach (DataGridViewRow row in yourDataGridView.Rows)
{
     row.Selected = false;
}

// Get the selected Row
DataGridView.HitTestInfo info = yourDataGridView.HitTest( e.X, e.Y );

// Set as selected
yourDataGridView.Rows[info.RowIndex].Selected = true;



//You can use JvR's code in the MouseDown event of your DataGridView.

private void SubClassedGridView_MouseDown(object sender, MouseEventArgs e)
{
    // Sets is so the right-mousedown will select a cell
     DataGridView.HitTestInfo hti = this.HitTest(e.X, e.Y);
    // Clear all the previously selected rows
    this.ClearSelection();

    // Set as selected
    this.Rows[hti.RowIndex].Selected = true;
}
private void dataGridView_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
{
    if (e.Button == MouseButtons.Right)
     {
         dataGridView.CurrentCell = dataGridView[e.ColumnIndex, e.RowIndex];
     }
}

控制右键菜单出现的位置为鼠标点击的地方呢？
private void dataGridView1_MouseDown(object sender, MouseEventArgs e)
{
    int r = this.dataGridView1.HitTest(e.X, e.Y).RowIndex;
    int c = this.dataGridView1.HitTest(e.X, e.Y).ColumnIndex;
    if (r >= 0 && c >= 0) //点中Cell
     {
         DataGridViewCell hitcell = this.dataGridView1.Rows[r].Cells[c];

         Point pscreen = this.dataGridView1.PointToScreen(e.Location);
         Point pForm = this.PointToClient(pscreen);
        this.textBox1.Text = pscreen.ToString(); //相对屏幕的坐标
        this.textBox2.Text = pForm.ToString(); //相对当前Form的坐标

     }
    else //没点中Cell
     {

     }

}