【三层架构】一个aspx页面读取server 2008不同表里面的数据

实例：点击搜索按钮，跳出搜索出来的信息。

多建立几个bll实例-读取数据。Over

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;
using System.Data;
using System.Data.SqlClient;
using System.Text;

namespace helios.Web
{
public partial class sousuo : System.Web.UI.Page
{
helios.BLL.sousuo bll = new helios.BLL.sousuo();//实例化适用于微课程的BLL层
helios.BLL.wenjian.MiroLctsDiscuss bllTaolun = new helios.BLL.wenjian.MiroLctsDiscuss();//讨论
helios.BLL.wenjian.Users bllChengyuan = new helios.BLL.wenjian.Users();//成员
helios.BLL.wenjian.Lctstag bllBiaoqian = new helios.BLL.wenjian.Lctstag();//标签
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{

TextBoxsearch2.Text = Session["guanjianci"].ToString();
Session.Remove("guanjianci");
//TextBoxsearch2.Text = Request.QueryString["guanjianci"];

GridView1.BorderColor = ColorTranslator.FromHtml(Application[Session["Style"].ToString() + "xtable_bordercolorlight"].ToString());
GridView1.HeaderStyle.BackColor = ColorTranslator.FromHtml(Application[Session["Style"].ToString() + "xtable_titlebgcolor"].ToString());

BindData();
}
}
public void BindData()
{
#region
//if (!Context.User.Identity.IsAuthenticated)
//{
// return;
//}
//AccountsPrincipal user = new AccountsPrincipal(Context.User.Identity.Name);
//if (user.HasPermissionID(PermId_Modify))
//{
// gridView.Columns[6].Visible = true;
//}
//if (user.HasPermissionID(PermId_Delete))
//{
// gridView.Columns[7].Visible = true;
//}
#endregion
DataSet dsWeikecheng = new DataSet();//新建一个叫做ds的dataset实例，用于存放从数据库中读取的数据。
DataSet dsTaolun = new DataSet();
DataSet dsChengyuan = new DataSet();
DataSet dsBiaoqian = new DataSet();
StringBuilder strWhere = new StringBuilder();//新建一个strWhere 语句。就相当于string的高级版，操作多个字符串的时候使用，效率比string高
StringBuilder strTaolun = new StringBuilder();
StringBuilder strChengyuan = new StringBuilder();
StringBuilder strBiaoqian = new StringBuilder();
if (TextBoxsearch2.Text.Trim() != "")//trim,一个string类特有的属性（方法），使得去掉文本框中两边输入的空格只剩下输入的字符或数字
{
strWhere.AppendFormat("kcBiaoti like '%{0}%' or kcLeixing like '%{0}%'", TextBoxsearch2.Text.Trim());//AppendFormat是使用类似String.Format方式追加具备一定格式的字符串。Append是直接添加字符。
strTaolun.AppendFormat("tlBiaoti like '%{0}%'", TextBoxsearch2.Text.Trim());
strChengyuan.AppendFormat("yonghuming like '%{0}%'", TextBoxsearch2.Text.Trim());
strBiaoqian.AppendFormat("biaoqian like '%{0}%'", TextBoxsearch2.Text.Trim());

dsWeikecheng = bll.GetList(strWhere.ToString());//将strWhere这个实例字符串语句传递到已经被实例化的bll层的GetList方法里面。获得一个实例化过的真真正正的dataset
dsTaolun = bllTaolun.GetList(strTaolun.ToString());
dsChengyuan = bllChengyuan.GetList(strChengyuan.ToString());
dsBiaoqian = bllBiaoqian.GetList(strBiaoqian.ToString());

GridView1.DataSource = dsWeikecheng;//gridView里面的数据源从哪里来呢，就从一个实例化过的真真正正的dataset里来，它的名字叫做ds.
//数据源已经有了，但是还没有绑定啊，那还不赶紧绑定啊。
GridView1.DataBind();//将数据源绑定到在designer.cs里面声明过的aspxGridView 控件中。没有？赶紧在你要显示的页面里面建一个啊。

gvTaolun.DataSource = dsTaolun;
gvTaolun.DataBind();

gvChengyuan.DataSource = dsChengyuan;
gvChengyuan.DataBind();

gvBiaoqian.DataSource = dsBiaoqian;
gvBiaoqian.DataBind();

}
else
{
ltishi.Visible = true;
}

}
}
}