如何获取gridview 选中值的上一行的值？

Question

如何获取gridview 选中值的上一行的值？
请高手指教！
protected void Button1_Click(object sender, EventArgs e)
    {
        foreach (GridViewRow row in GridView1.Rows)
        {
            CheckBox cbox = (CheckBox)row.FindControl("CheckBox1");
            if (cbox != null)
            {
                if (cbox.Checked == true)
                {
                
                    int id = Int32.Parse(GridView1.DataKeys[row.RowIndex].Value.ToString());
                    int uid = id - 1;                    Label lbl = (Label)GridView1.Rows[row.RowIndex-1].FindControl("Lable2");
                    
                                        Label lab = (Label)row.FindControl("Label1");
                     string text = lab.Text;
                    string txt =lbl.Text; （这行总弹出用户代码未处理）
                     Updatemulu1(id, txt);
                     Updatemulu(uid, text);
                 }
            }
        }

Answer 1

判断row.RowIndex值
Label lbl = (Label)GridView1.Rows[row.RowIndex>0?row.RowIndex-1:row.RowIndex].FindControl("Lable2");
if(lbl!=null)
{}

Answer 2

for(int =1;i<this.GridView1.Rows.Count;i++){
checkBox cb=(this.GridView1.Rows.FindControl("CheckBox1")) as CheckBox
if(cb.checked==true){
Label lbl = (GridView1.Rows[i].FindControl("Lable2") as Lable).Text;得到ID
}
}下面的就好写了吧

Answer 3

数据表都有个唯一字段 你在gridview中加上 datakeyNames="id"
后台 取值 int id =Convert.toint32(GridView1.DataKeys[row.RowIndex].Values["id"]);
根据你取到的Id去数据库里查就OK了