C# winform datagridview中如何实现鼠标右键点击一行数据出现一个带有删除的菜单，并能执行删除操作？

这是两个属性，点击一行是将其selectionMode属性设为FullRowSelect可以实现选定一行！！而出现鼠标右键是使用的contentmenustrip控件，将datagridview的contentmenustrip属性值绑定到该控件上即可！至于删除菜单可以在contentmenustrip控件中添加！！

首先在程序中添加一个ContexMenuStrip1控件，给该控件添加删除项，
把 datagridview的ContexMenuStrip属性项绑定为你所添加的ContexMenuStrip1控件，然后就是你自己编写程序来操作删除具体的东西了

在MouseDown 事件里面写：
private void KnowledgedataGridView_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Right) //判断是不是右键
{
Control control = new Control();

Point ClickPoint = new Point(e.X, e.Y);
control.GetChildAtPoint(ClickPoint);

if (KnowledgedataGridView.HitTest(e.X, e.Y).RowIndex >= 0 && KnowledgedataGridView.HitTest(e.X, e.Y).ColumnIndex >= 0)//判断你点的是不是一个信息行里
{
KnowledgedataGridView.CurrentCell = KnowledgedataGridView.Rows[KnowledgedataGridView.HitTest(e.X, e.Y).RowIndex].Cells[KnowledgedataGridView.HitTest(e.X, e.Y).ColumnIndex];
ContextMenu con = new ContextMenu();
MenuItem menuAddknowledge = new MenuItem("添加知识点");
MenuItem menuLine1 = new MenuItem("-");
MenuItem menuUpdateknowledge = new MenuItem("修改修改知识点");
MenuItem menuLine2 = new MenuItem("-");
MenuItem menuDeleteknowledge = new MenuItem("删除知识点");

menuAddknowledge.Click += new EventHandler(tSButAdd_Click);
menuUpdateknowledge.Click += new EventHandler(tSButUpdate_Click);
menuDeleteknowledge.Click += new EventHandler(tSButDel_Click);

con.MenuItems.Add(menuAddknowledge);
con.MenuItems.Add(menuLine1);
con.MenuItems.Add(menuUpdateknowledge);
con.MenuItems.Add(menuLine2);
con.MenuItems.Add(menuDeleteknowledge);

this.KnowledgedataGridView.ContextMenu = con;
con.Show(KnowledgedataGridView, new Point(e.X + 10, e.Y));
}
}
}