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如何将类别与子类别相关联,并在网格视图中显示数据,并在 asp.net 中的数据库中绑定数据?

 protected void Page_Load(object sender, EventArgs e)
    {
        {
            if (Page.IsPostBack == false)
                bind();
        }
    }

private void bind()
{
    string subcat1 = "" + Session["subcat"];
    SqlDataAdapter adp = new SqlDataAdapter("select * from catsubcat where subcategory='" + subcat1 + "' and category='electronics'", Class1.getconnectionstring());
    DataSet ds = new DataSet();
    adp.Fill(ds);
    GridView1.DataSource = ds;
    GridView1.DataBind();

}
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