houtai/edit_category.aspx.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
namespace 电子商务.houtai
{
    public partial class edit_category : System.Web.UI.Page
    {
        SQLHelper db = new SQLHelper();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                bind();

            }
        }
        public void bind()
        {
            int id = int.Parse(Request.QueryString["id"].ToString());
            string cx = "select * from category where c_id=" + id;
            DataTable d = db.ExecuteQuery(cx, CommandType.Text);
            this.txt_category.Text = d.Rows[0]["category"].ToString();
            //
            string sql = "select * from bigcategory";
            DataTable dt = db.ExecuteQuery(sql, CommandType.Text);
            this.ddl_big.DataSource = dt;
            this.ddl_big.DataTextField = "bigcategory";
            this.ddl_big.DataValueField = "big_id";
            this.ddl_big.DataBind();
            this.ddl_big.Items.FindByValue(d.Rows[0]["big_id"].ToString()).Selected = true;
            //

            
        }
        protected void Button1_Click(object sender, EventArgs e)
        {
            int id = int.Parse(Request.QueryString["id"].ToString());
            int big_id = int.Parse(this.ddl_big.SelectedValue.ToString());
            string category = this.txt_category.Text.ToString();
            string sql = "update category set big_id='"+big_id+"',category='"+category+"' where c_id="+id;
            db.ExecuteNonQuery(sql, CommandType.Text);
            Response.Redirect("categorylist.aspx");
        }
    }
}