protected void Gv_RowCreated(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                LinkButton lbl = (LinkButton)e.Row.FindControl("yourcontrolid");
                lbl.Attributes.Remove("onclick");
                lbl.Attributes.Add("onclick", "return confirm('确认删除?');");
            }
        }

------解决方案--------------------
((LinkButton)e.Row.Cells[0].Controls[0]).Attributes.Add("onclick", "if(!confirm('确认删除?')){return false;}");

------解决方案--------------------
探讨

应该是你绑定到的事件错了，在GridView创建每行时执行你的绑定，还有javascript:可省


------解决方案--------------------
我错了，是RowDataBound事件
C# code

    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        GridViewRow gvRow = e.Row;
        LinkButton lbtnClick = gvRow.FindControl("按钮名称");
        lbtnClick.OnClientClick = "return confirm('确认删除?')";
    }

------解决方案--------------------
C# code

LinkButton lbtnClick = gvRow.FindControl("按钮名称") as LinkButton;

------解决方案--------------------
这个是没有问题的！你可以试试
C# code

  protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
     {
         //如果是绑定数据行
         if (e.Row.RowType == DataControlRowType.DataRow)
        {
             if (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate)
             {
                 ((LinkButton)e.Row.Cells[6].Controls[0]).Attributes.Add("onclick", "javascript:return confirm('你确认要删除：\"" + e.Row.Cells[1].Text + "\"吗?')");
            }
         }
 
    }

------解决方案--------------------
嗯，楼上的似乎都回答了