webform1.aspx.cs

C#2005 实例源代码

using System;
using System.Data;
using System.Configuration;
using System.Collections;
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 WebForm1 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!this.IsPostBack)
        {
            InitData();
        }
    }

    /// <summary>
    /// 利用DataReader对象，把SQLServer示例数据库：NorthWind，表Categories中的数据绑定到下拉框ListBox1
    /// </summary>
    private void InitData()
    {
        //连接数据库
        SqlConnection myCon = new SqlConnection();
        myCon.ConnectionString = "Persist Security Info=False;User id=sa;pwd=sa;database=northwind;server=(local)";
        myCon.Open();

        //使用SqlCommand提交查询命令
        SqlCommand selectCMD = new SqlCommand("SELECT * FROM Categories", myCon);

        //获取数据适配器
        SqlDataAdapter da = new SqlDataAdapter();
        da.SelectCommand = selectCMD;

        //创建 SqlDataReader
        SqlDataReader dr = selectCMD.ExecuteReader();

        //将DataSet中的数据绑定到ListBox1
        ListBox1.DataSource = dr;
        ListBox1.DataTextField = "CategoryName";
        ListBox1.DataValueField = "CategoryID";
        ListBox1.DataBind();

        //断开连接
        myCon.Close();
    }
}