GenericListUserControl.cs :  » Persistence-Frameworks » Data-Holder » DBWebControls » Controls » C# / CSharp Open Source

using System;
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.WebControls;
using DataHolder.Containers;
using DataHolder.DataPersistence;
using DBWebControls.WebNavigator;

namespace DBWebControls.Controls{
  /// <summary>
  /// Summary description for GenericListPage.
  /// </summary>
  public class GenericListUserControl :GenericUserControl
  {
    private DataGrid MainDataGrid;
    private ControlsBinder filterControls;
    private Button FilterButton; 
    private TextBox itemsPerPage;
    
    public void InitListControl( DataGrid p_MainDataGrid, ControlsBinder p_filterControls, Button p_FilterButton, TextBox p_itemsPerPage)
    {
      MainDataGrid = p_MainDataGrid;
      filterControls = p_filterControls;
      FilterButton = p_FilterButton;
      itemsPerPage = p_itemsPerPage;

      FilterButton.Click +=new EventHandler(FilterData);
      MainDataGrid.SortCommand += new DataGridSortCommandEventHandler(MainDataGrid_SortCommand);
      MainDataGrid.PageIndexChanged += new DataGridPageChangedEventHandler(MainDataGrid_PageIndexChanged);
    }


    #region UserControlsOverrides
    protected override void OnLoad(EventArgs e)
    {
      base.OnLoad (e);
      if(!this.IsPostBack)
      {
        MainDataGrid.CurrentPageIndex = 0;
        BindDataGrid();
      }
      else
        filterControls.GetValuesFromControls(((NavListUserControlState)ControlData).ListState.GEfilters);
    }

    protected override void OnPreRender(EventArgs e)
    {
      filterControls.SetValuesToControls(((NavListUserControlState)ControlData).ListState.GEfilters);
      base.OnPreRender (e);
    }
    #endregion

    #region BindData

    public virtual void SetDataGridDataSource()
    {
      MainDataGrid.DataSource = ((NavListUserControlState)ControlData).ListState.LoadedData;
      MainDataGrid.DataBind();
    }

    public virtual void BindDataGrid()
    {
      NavListUserControlState cdata = (NavListUserControlState)ControlData;
      MainDataGrid.PageSize = int.Parse(itemsPerPage.Text);
      int RowsCount = 0;
      ColumnFilterInfoCollection cfi = cdata.ListState.GetFilterValues();
      OrderByInfoCollection obi = cdata.ListState.GetorderByInfo();
      GenericDataCollection gecoll = LoadDataPagedData(out RowsCount, cfi, obi, MainDataGrid.PageSize, MainDataGrid.CurrentPageIndex, 0);
      MainDataGrid.VirtualItemCount = RowsCount;
      cdata.ListState.LoadedData = gecoll;    
      SetDataGridDataSource();
    }

    #endregion

    #region Events
    public virtual void FilterData(object sender, System.EventArgs e)
    {
      MainDataGrid.CurrentPageIndex = 0;
      BindDataGrid();
    }

    public virtual void MainDataGrid_SortCommand(object source, System.Web.UI.WebControls.DataGridSortCommandEventArgs e)
    {
      NavListUserControlState cdata = (NavListUserControlState)ControlData;
      if(cdata.ListState.SortColumn == e.SortExpression)
      {
        if(cdata.ListState.SortDirection == ListSortDirection.Ascending)
          cdata.ListState.SortDirection = ListSortDirection.Descending;
        else
          cdata.ListState.SortDirection = ListSortDirection.Ascending;
      }
      else
      {
        cdata.ListState.SortColumn = e.SortExpression;
        cdata.ListState.SortDirection = ListSortDirection.Ascending;
      }
      BindDataGrid();
    }

    public virtual void MainDataGrid_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
    {
      MainDataGrid.CurrentPageIndex = e.NewPageIndex;
      BindDataGrid();
    }
    #endregion

    #region LoadData Abstracts
    public virtual GenericDataCollection LoadDataPagedData(out int RowsCount, ColumnFilterInfoCollection filters, OrderByInfoCollection orderinfo,int PageSize, int CurrentPageIndex, int EmptySpacesInPage)
    {
      throw new Exception("List Page Exception : LoadDataPagedData function not implemented");
    }
    #endregion

  }
}