/// <summary>
    /// 备份Access数据库
    /// </summary>
    /// <param name="srcPath">要备份的数据库绝对路径</param>
    /// <param name="aimPath">备份到的数据库绝对路径</param>
    /// <returns></returns>
    public bool Backup(string srcPath, string aimPath)
    {

if (!File.Exists(srcPath))
        {
            throw new Exception("源数据库不存在,无法备份");
        }
        try
        {
            File.Copy(srcPath, aimPath, true);
        }
        catch (IOException ixp)
        {
            return false;
            throw new Exception(ixp.ToString());

}
        return true;
    }

/// <summary>
    /// 还原Access数据库
    /// </summary>
    /// <param name="bakPath">备份的数据库绝对路径</param>
    /// <param name="dbPath">要还原的数据库绝对路径</param>
    public bool RecoverAccess(string bakPath, string dbPath)
    {
        if (!File.Exists(bakPath))
        {
            throw new Exception("备份数据库不存在,无法还原");
        }
        try
        {
            File.Copy(bakPath, dbPath, true);
        }
        catch (IOException ixp)
        {
            return false;
            throw new Exception(ixp.ToString());
        }
        return true;
    }

//备份的事件及获取备份路径和还原的路径

protected void Button1_Click(object sender, EventArgs e)
    {
        string path = HttpContext.Current.Server.MapPath("../App_Data/df.mdb");
        string pathdata = path ;
        string pathback = path.Substring(0, path.Length - 15) + @"dataBack\df.mdb";
        if (Backup(pathdata, pathback))
        {
            Label3.Text = "备份成功！";
        }
        else
        {
            Label3.Text = "备份失败！";
        }
    }

//还原的事件及获取备份路径和还原的路径

protected void Button2_Click(object sender, EventArgs e)
    {
        string path = HttpContext.Current.Server.MapPath("../App_Data/df.mdb");
        string pathdata = path;
        string pathback = path.Substring(0, path.Length - 15) + @"dataBack\df.mdb";
        if (RecoverAccess(pathback, pathdata))
        {
            Label3.Text = "还原成功！";
        }
        else
        {
            Label3.Text = "还原失败！";
        }
    }