选中从gridview1到gridview2的所选行ASP.NET C＃

Question

正如标题所说的，无论如何我都有一个表是sql-server products 。

其中具有产品ID，名称，价格和类别。

我所做的是将数据明智地GridView到第一个GridView类别中，而我想要的是当我检查该特定行或多行并单击选择按钮时，它将在第二个Gridview中显示产品名称和价格。

但是它的作用是将第二个gridview中的下一个选定项覆盖到先前选定的项，并仅显示一行而不是多个选定项。

有谁能够帮助我 ？？

这是一个代码

protected void Button1_Click(object sender, EventArgs e)
    {
        for (int i = 0; i < GridView1.Rows.Count; i++)
        {

            CheckBox chbox = GridView1.Rows[i].Cells[0].FindControl("CheckBox1") as CheckBox;

            if (chbox.Checked == true)
            {
                string conn = ConfigurationManager.ConnectionStrings["Test_T3ConnectionString2"].ConnectionString;
                SqlConnection con = new SqlConnection(conn);
                string query = "select prod_name,price from products where prod_id = '" + GridView1.Rows[i].Cells[1].Text + "'";
                SqlCommand cmd = new SqlCommand(query, con);
                SqlDataAdapter da = new SqlDataAdapter(cmd);
                DataTable dt = new DataTable();
                da.Fill(dt);

                GridView2.DataSource = dt;
                GridView2.DataBind();
            }

        }
    }

Answer 1

您绑定网格太多次。

protected void Button1_Click(object sender, EventArgs e) {
List<string> checkedIDs = new List<string>();

 for (int i = 0; i < GridView1.Rows.Count; i++) {

    CheckBox chbox = GridView1.Rows[i].Cells[0].FindControl("CheckBox1") as CheckBox;

    if (chbox.Checked == true)
    {
        checkedIDs.Add("'" + GridView1.Rows[i].Cells[1].Text + "'");
    }

}


        string conn = ConfigurationManager.ConnectionStrings["Test_T3ConnectionString2"].ConnectionString;
        SqlConnection con = new SqlConnection(conn);
        string query = "select prod_name,price from products where prod_id in (" + string.Join(",", checkedIDs.ToArray()) + ")";
        SqlCommand cmd = new SqlCommand(query, con);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataTable dt = new DataTable();
        da.Fill(dt);

        GridView2.DataSource = dt;
        GridView2.DataBind();
}