using System;
using System.Windows.Forms;
using DevExpress.XtraEditors;
using UAS_PLCDataReader.DataOperate;
using UAS_PLCDataReader.Entity;
using System.Data;

namespace UAS_PLCDataReader.CustomerControl.PagingControl
{
    public partial class PageControl : UserControl
    {

        DataHelper dh = SystemInf.dh;

        private AutoDataGridControl.AutoDataGridControl gridcontrol;

        public AutoDataGridControl.AutoDataGridControl Gridcontrol
        {
            get
            {
                return gridcontrol;
            }

            set
            {
                gridcontrol = value;
            }
        }

        public PageControl()
        {
            InitializeComponent();
        }

        private void PageControl_Load(object sender, EventArgs e)
        {
            if (gridcontrol != null)
                gridcontrol.VisibleChanged += Gridcontrol_VisibleChanged;
        }

        private void Gridcontrol_VisibleChanged(object sender, EventArgs e)
        {
            PageCount.Text = (gridcontrol.RowCount / int.Parse(PageSize.Text) + 1).ToString();
        }

        private void GoPage_Click(object sender, EventArgs e)
        {
            SimpleButton button = sender as SimpleButton;
            string SQL = gridcontrol.GetDataSQL;
            int pagesize = int.Parse(PageSize.Text);
            int currentpage = int.Parse(CurrentPage.Text);
            int rowcount = gridcontrol.RowCount;
            switch (button.Name)
            {
                case "GoFirstPage":
                    CurrentPage.Text = "1";
                    currentpage = 1;
                    break;
                case "GoFormerPage":
                    if (currentpage == 1)
                    {
                        XtraMessageBox.Show("当前已经是第一页", "提示");
                        return;
                    }
                    CurrentPage.Text = (currentpage - 1).ToString();
                    currentpage = currentpage - 1;
                    break;
                case "GoNextPage":
                    if (currentpage.ToString() == PageCount.Text)
                    {
                        XtraMessageBox.Show("当前已经是最后一页", "提示");
                        return;
                    }
                    CurrentPage.Text = (currentpage + 1).ToString();
                    currentpage = currentpage + 1;
                    break;
                case "GoLastPage":
                    CurrentPage.Text = ((rowcount / pagesize) + 1).ToString();
                    currentpage = int.Parse(PageCount.Text);
                    break;
                default:
                    break;
            }
            gridcontrol.DataSource = dh.ExecuteSql("select * from (select RowNum RN, A.* from(" + SQL + ")A) where RN<=" + pagesize * currentpage + "and RN >" + pagesize * (currentpage - 1), "select");
        }

        private void PageSize_SelectedIndexChanged(object sender, EventArgs e)
        {
            DataTable dt = (DataTable)dh.ExecuteSql(gridcontrol.GetDataSQL,"select");
            PageCount.Text = (dt.Rows.Count / int.Parse(PageSize.Text)).ToString();
        }
    }
}