C#中定义了多个buttonfield，但只有最后一个删除按钮有显示

ButtonField buttonfield1 = new ButtonField();
buttonfield1.HeaderText = "查看";
buttonfield1.Text = "查看";
buttonfield1.CommandName = "chakan";
buttonfield1.HeaderStyle.Width = Unit.Pixel(40);
buttonfield1.HeaderStyle.HorizontalAlign = HorizontalAlign.Center;
buttonfield1.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
GridView1.Columns.Add(buttonfield1);

        ButtonField bianjicol = new ButtonField();
        bianjicol.CommandName = "bianji";
        bianjicol.HeaderText = "编辑";
        bianjicol.Text = "编辑";
       // bianjicol.ButtonType = ButtonType.Link;
        bianjicol.HeaderStyle.Width = Unit.Pixel(40);
        bianjicol.HeaderStyle.HorizontalAlign = HorizontalAlign.Center;
        bianjicol.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
        GridView1.Columns.Add(bianjicol);

        CommandField shanchucol = new CommandField();
        shanchucol.ShowDeleteButton = true;
        shanchucol.HeaderText = "删除";
        shanchucol.HeaderStyle.Width = Unit.Pixel(40);
        shanchucol.HeaderStyle.HorizontalAlign = HorizontalAlign.Center;
        shanchucol.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
        GridView1.Columns.Add(shanchucol);

你应该搞清楚GridView1这个用法，你前面的按钮都被覆盖了。所以只有最后的删除按钮。我不清楚你是要干嘛，明明可以手动设置的，为何代码设置。

GridView1如何是哦多个列的话是Columns1，Columns2 。你最好先手动设置看效果