productsearch.ascx.cs

电子商务网站,结合Visual Sttudio 2005和SQL 2005 用ASP.NET语言开发的网站.

namespace shop.Controls
{
	using System;
	using System.Data;
	using System.Drawing;
	using System.Web;
	using System.Web.UI.WebControls;
	using System.Web.UI.HtmlControls;
	using shop.DbBase;

	/// <summary>
	///		productSearch 的摘要说明。
	/// </summary>
	public class ProductSearch : System.Web.UI.UserControl
	{
		protected System.Web.UI.WebControls.TextBox txtName;
		protected System.Web.UI.WebControls.TextBox txtStartPrice;
		protected System.Web.UI.WebControls.TextBox txtEndPrice;
		protected System.Web.UI.WebControls.DropDownList dropProductClassA;
		protected System.Web.UI.WebControls.DropDownList dropProductClassB;
		protected System.Web.UI.WebControls.ImageButton imgBtnSearch;

		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			if(!this.IsPostBack)
			{
				ViewState["ClassA"] = "";
				BindClassA();
			}
			else
			{
				/**
				if(!object.Equals(ViewState["ClassA"],null))
				{
					BindClassB();
				}
				**/
			}
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		///		设计器支持所需的方法 - 不要使用代码编辑器
		///		修改此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.dropProductClassA.SelectedIndexChanged += new System.EventHandler(this.dropProductClassA_SelectedIndexChanged);
			this.imgBtnSearch.Click += new System.Web.UI.ImageClickEventHandler(this.imgBtnSearch_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void dropProductClassA_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			ViewState["ClassA"] = dropProductClassA.SelectedItem.ToString();
			/**/
			if(!object.Equals(ViewState["ClassA"],null))
			{
				BindClassB();
			}
			/**/
		}

		private void BindClassA()
		{
			dropProductClassA.Items.Clear();
			string sSql = "select * from AClass";
			DataSet oDS = OleBase.ExecuteSql4Ds(sSql);
			dropProductClassA.DataSource = oDS.Tables[0].DefaultView;
			dropProductClassA.DataBind();
			dropProductClassA.Items.Add(new ListItem("所有类型","0"));
			dropProductClassA.SelectedValue = "0";
		}

		private void BindClassB()
		{
			dropProductClassB.Items.Clear();
			string sSql;
			string sClassA = ViewState["ClassA"].ToString();
			if((sClassA=="所有类型")||(sClassA==""))
				sSql = "select bclassid,bclassname from bClass";
			else
				sSql = "select bclassid,bclassname from bClass where aclassname = \"" + ViewState["ClassA"].ToString() + "\"";
			DataSet oDS = OleBase.ExecuteSql4Ds(sSql);
			dropProductClassB.DataSource = oDS.Tables[0].DefaultView;
			dropProductClassB.DataBind();		
			dropProductClassB.Items.Add("所有类型");
		}

		private void imgBtnSearch_Click(object sender, System.Web.UI.ImageClickEventArgs e)
		{
			Response.Redirect("productSearch.aspx?class="+dropProductClassB.SelectedItem.ToString()+"&name="+txtName.Text+"&startPrice="+txtStartPrice.Text+"&endPrice="+txtEndPrice.Text);
		}
	}
}