Default.aspx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class _Default : Web.Pages
{
    SqlHelper data = new SqlHelper();
    protected void Page_Load(object sender, EventArgs e)
    {
        this.Title = "二手汽车网上销售系统";
        if (!IsPostBack)
        {
            DropDownList1.DataSource = data.GetDataReader("select * from CarType");
            DropDownList1.DataValueField = "id";
            DropDownList1.DataTextField = "name";
            DropDownList1.DataBind();
            DropDownList1.Items.Add("所有类别");
            DropDownList1.Items[this.DropDownList1.Items.Count - 1].Value = " ";
            DropDownList1.SelectedIndex = this.DropDownList1.Items.Count - 1;
            getAbot();

            dlNews.DataSource = data.GetDataReader("select top  5 * from  News   order by  id desc ");
            dlNews.DataBind();
            DataList1.DataSource = data.GetDataReader("select top  5 * from  News  where  typeName='购车帮助'  order by  click desc ");
            DataList1.DataBind();
            HotCar.DataSource = data.GetDataReader("select top 6  * from  CarInfo  order by  CarClick desc ");
            HotCar.DataBind();

        }
    }
    private void getAbot()
    {
        SqlDataReader dr;
        dr = data.GetDataReader("select top 1 * from  AboutInfo ");
        dr.Read();
        if (dr["AboutInfo"].ToString().Length > 170)
        {
            About.InnerHtml = dr["AboutInfo"].ToString().Substring(0, 170) + " ……<a href='About.aspx'>[详细]</a>";
        }
        else
        {
            About.InnerHtml = dr["AboutInfo"].ToString() + "<a href='About.aspx'>[详细]</a>";
        }
    }
    protected string CutChar(string strChar, int intLength)
    {
        //取得自定义长度的字符串
        if (strChar.Length > intLength)
        { return strChar.Substring(0, intLength); }
        else
        { return strChar; }

    }