在gridview中检查的每个复选框的字符串值为空

Question

我有这个代码，点击一个按钮，我想获得每行中检查的所有复选框的Empid。但是字符串变量str总是空的并且没有任何值。为什么会这样呢？请帮助

   protected void btn_3id_Click(object sender, EventArgs e)
    {
        string str = "";
        string srr = "";

        for (int i = 0; i < GridView1.Rows.Count; i++)
        {
            CheckBox chk = (CheckBox)GridView1.Rows[i].FindControl("CheckBox1");
            if (chk.Checked)
            {
                if (str == "")
                {
                    str = GridView1.Rows[i].Cells[0].Text.ToString();
                }
                else
                {
                    srr = str + "," + GridView1.Rows[i].Cells[1].Text.ToString();
                }
            }
        }
        Session["card_id"] = str;
        Response.Redirect("ID.aspx");
    }
}

Answer 1

如果您的控件名称是Label，则使用

str = ((Label)GridView1.Rows[i].FindControl("yourlabelid")).Text;

取代

str = GridView1.Rows[i].Cells[0].Text.ToString();