datagridview重叠_datagridview绑定list_datagridview右键菜单(54)

{

// first remove event handler to keep from attaching multiple:

cb.SelectedIndexChanged -= new

EventHandler(cb_SelectedIndexChanged);

// now attach the event handler

cb.SelectedIndexChanged = new

EventHandler(cb_SelectedIndexChanged);

}

}

void cb_SelectedIndexChanged(object sender, EventArgs e)

{

MessageBox.Show("Selected index changed");

}

13. 如何通过拖放调整行的顺序？

通过拖放调整行的顺序不是DataGridView的内置功能，但使用标准的拖放处理代码，你可以很容易的实现这个功能。下面这个代码片断演示了这个过程，假定你的窗体上有一个name为dataGridView1的DataGridView，它的AllowDrop属性为true，还要为它添加必要的事件处理方法。(我试运行了这段代码，如果通过数据绑定为DataGridView添加数据，那么下面的代码将不会生效，因为它只能为非绑定方式添加的行排序，如果要以绑定方式添加数据，请参看我的示例程序)

private Rectangle dragBoxFromMouseDown;

private int rowIndexFromMouseDown;

private int rowIndexOfItemUnderMouseToDrop;

private void dataGridView1_MouseMove(object sender, MouseEventArgs e)

{

if ((e.Button & MouseButtons.Left) == MouseButtons.Left)

{

// If the mouse moves outside the rectangle, start the drag.

if (dragBoxFromMouseDown != Rectangle.Empty &&

!dragBoxFromMouseDown.Contains(e.X, e.Y))

{

// Proceed with the drag and drop, passing in the list item.

DragDropEffects dropEffect = dataGridView1.DoDragDrop(

dataGridView1.Rows[rowIndexFromMouseDown],

DragDropEffects.Move);

}

}

}

private void dataGridView1_MouseDown(object sender, MouseEventArgs e)

{

// Get the index of the item the mouse is below.

rowIndexFromMouseDown = dataGridView1.HitTest(e.X, e.Y).RowIndex;

if (rowIndexFromMouseDown != -1)

{

// Remember the point where the mouse down occurred.

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