zyxt/App_Code/DataAccess.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;

/// <summary>
/// DataAccess 的摘要说明
/// </summary>
public class DataAccess
{
	public DataAccess()
	{
		//
		// TODO: 数据库操作类
		//
	}

    public DataSet GetDataSet(string Str)
    {
        //数据库操作类，接参Str返回DataSet
        SqlConnection conn = ODB.createConn();
        conn.Open();
        SqlCommand cmd = new SqlCommand(Str, conn);
        SqlDataAdapter sda = new SqlDataAdapter();
        sda.SelectCommand = cmd;
        DataSet ds = new DataSet();
        sda.Fill(ds, "mytb");
        conn.Close();
        conn.Dispose();
        return ds;
    }

    //**************************************************//

    public string GetStringOne(string Str)
    {
        //数据库操作类，接参Str返回一行一例数据
        SqlConnection conn = ODB.createConn();
        conn.Open();
        SqlCommand cmd = new SqlCommand(Str, conn);
        string Strs = Convert.ToString(cmd.ExecuteScalar());
        conn.Close();
        conn.Dispose();
        return Strs;
    }

    //**************************************************//

    public int UpdataAccess(string Str)
    {
        //数据库操作类，接参Str更新数据库，成功返回１，失败返回０
        SqlConnection conn = ODB.createConn();
        conn.Open();
        SqlCommand cmd = new SqlCommand(Str, conn);