App_Code/WebFunction.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.Text.RegularExpressions;
using System.Data.OleDb;

/// <summary>
/// WebFunction 的摘要说明
/// </summary>
public class WebFunction
{
    protected static OleDbConnection conn = new OleDbConnection();
    protected static OleDbCommand comm = new OleDbCommand();

    public WebFunction()
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //
    }

    /// <summary> 
    /// 打开数据库连接 
    /// </summary> 
    private static void openConnection()
    {
        if (conn.State == ConnectionState.Closed)
        {
            conn.ConnectionString = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["xkConnStr"].ConnectionString;
            comm.Connection = conn;
            try
            {
                conn.Open();
            }
            catch (Exception e)
            {
                throw new Exception(e.Message);
            }
        }
    }
    /// <summary> 
    /// 关闭当前数据库连接 
    /// </summary> 
    private static void closeConnection()
    {
        if (conn.State == ConnectionState.Open)
            conn.Close();
        conn.Dispose();
        comm.Dispose();
    }
    /// <summary> 
    /// 执行Sql查询语句 
    /// </summary> 
    /// <param name="sqlstr">传入的Sql语句</param>