1//===============================================================================================
  2//
  3// (c) Copyright Microsoft Corporation.
  4// This source is subject to the Microsoft Permissive License.
  5// See http://www.microsoft.com/resources/sharedsource/licensingbasics/sharedsourcelicenses.mspx.
  6// All other rights reserved.
  7//
  8//===============================================================================================
  9
 10using System;
 11using System.Data;
 12using System.Configuration;
 13using System.Web;
 14using System.Web.Security;
 15using System.Web.UI;
 16using System.Web.UI.WebControls;
 17using System.Web.UI.WebControls.WebParts;
 18using System.Web.UI.HtmlControls;
 19using System.Reflection;
 20using System.Web.UI.Design;
 21using System.ComponentModel;
 22using System.Collections;
 23using System.Collections.Generic;
 24using System.Drawing;
 25
 26namespace MyWebPagesStarterKit.Controls
 27...{
 28    [ToolboxData("<{0}:Pager runat=server></{0}:Pager>")]
 29    public class Pager : WebControl, INamingContainer
 30    ...{
 31        private ITemplate _separatorTemplate;
 32        private Control _controlToPage;
 33        private string _controlToPageName;
 34        private PagedDataSource _pagedDataSource;
 35        private int _pageSize;
 36        private string _firstImageUrl;
 37        private string _previousImageUrl;
 38        private string _nextImageUrl;
 39        private string _lastImageUrl;
 40        private PagerMode _mode;
 41        private bool _showPageNumbers;
 42        private Table _table;
 43
 44        public Pager()
 45        ...{
 46            _pageSize = 20;
 47            _firstImageUrl = string.Empty;
 48            _previousImageUrl = string.Empty;
 49            _nextImageUrl = string.Empty;
 50            _lastImageUrl = string.Empty;
 51            _mode = PagerMode.FirstPreviousNextLast;
 52            _showPageNumbers = true;
 53            _table = new Table();
 54        }
 55
 56        [Browsable(false), PersistenceMode(PersistenceMode.InnerProperty)]
 57        public ITemplate SeparatorTemplate
 58        ...{
 59            get ...{ return _separatorTemplate; }
 60            set ...{ _separatorTemplate = value; }
 61        }
 62
 63        public string ControlToPage
 64        ...{
 65            get ...{ return _controlToPageName; }
 66            set ...{ _controlToPageName = value; }
 67        }
 68
 69        public int PageSize
 70        ...{
 71            get ...{ return _pageSize; }
 72            set ...{ _pageSize = value; }
 73        }
 74
 75        public bool ShowPageNumbers
 76        ...{
 77            get ...{ return _showPageNumbers; }
 78            set ...{ _showPageNumbers = value; }
 79        }
 80
 81        public override Unit BorderWidth
 82        ...{
 83            get ...{ return _table.BorderWidth; }
 84            set ...{ _table.BorderWidth = value; }
 85        }
 86
 87        public override Color BorderColor
 88        ...{
 89            get ...{ return _table.BorderColor; }
 90            set ...{ _table.BorderColor = value; }
 91        }
 92
 93        public override BorderStyle BorderStyle
 94        ...{
 95            get ...{ return _table.BorderStyle; }
 96            set ...{ _table.BorderStyle = value; }
 97        }
 98
 99        public override Color BackColor
100        ...{
101            get ...{ return _table.BackColor; }
102            set ...{ _table.BackColor = value; }
103        }
104
105        public override string CssClass
106        ...{
107            get ...{ return _table.CssClass; }
108            set ...{ _table.CssClass = value; }
109        }
110
111        [UrlProperty]
112        public string FirstImageUrl
113        ...{
114            get ...{ return _firstImageUrl; }
115            set ...{ _firstImageUrl = ResolveUrl(value); }
116        }
117
118        [UrlProperty]
119        public string PreviousImageUrl
120        ...{
121            get ...{ return _previousImageUrl; }
122            set ...{ _previousImageUrl = ResolveUrl(value); }
123        }
124
125        [UrlProperty]
126        public string NextImageUrl
127        ...{
128            get ...{ return _nextImageUrl; }
129            set ...{ _nextImageUrl = ResolveUrl(value); }
130        }
131
132        [UrlProperty]
133        public string LastImageUrl
134        ...{
135            get ...{ return _lastImageUrl; }
136            set ...{ _lastImageUrl = ResolveUrl(value); }
137        }
138
139        public PagerMode Mode
140        ...{
141            get ...{ return _mode; }
142            set ...{ _mode = value; }
143        }
144
145        private int CurrentPageIndex
146        ...{
147            get ...{ return (ViewState["CurrentPageIndex"] == null) ? 0 : (int)ViewState["CurrentPageIndex"]; }
148            set ...{ ViewState["CurrentPageIndex"] = value; }
149        }
150
151        private int TotalPages
152        ...{
153            get ...{ return (ViewState["TotalPages"] == null) ? 0 : (int)ViewState["TotalPages"]; }
154            set ...{ ViewState["TotalPages"] = value; }
155        }
156
157        protected override void OnLoad(EventArgs e)
158        ...{
159            base.OnLoad(e);
160
161            _controlToPage = Parent.FindControl(_controlToPageName);
162            if (_controlToPage == null)
163                throw new Exception(string.Format("'{0}' is not a valid value for ControlToPage (The control does not exist).", _controlToPageName));
164
165            if (
166                    ! (
167                        (_controlToPage.GetType().IsSubclassOf(typeof(BaseDataBoundControl)))
168                        ||
169                        (_controlToPage.GetType().IsSubclassOf(typeof(BaseDataList)))
170                    )
171                )
172                throw new Exception("Works only for Controls deriving from BaseDataBoundControl or BaseDataList.");
173
174            if (_controlToPage is BaseDataBoundControl)
175                ((BaseDataBoundControl)_controlToPage).DataBinding += new EventHandler(ControlToPage_DataBinding);
176            else if (_controlToPage is BaseDataList)
177                ((BaseDataList)_controlToPage).DataBinding += new EventHandler(ControlToPage_DataBinding);
178        }
179
180        private void ControlToPage_DataBinding(object sender, EventArgs e)
181        ...{
182            ChildControlsCreated = false;
183
184            object o = null;
185
186            if (_controlToPage is BaseDataBoundControl)
187                o = ((BaseDataBoundControl)_controlToPage).DataSource;
188            else if (_controlToPage is BaseDataList)
189                o = ((BaseDataList)_controlToPage).DataSource;
190
191            IEnumerable enumerable;
192
193            if (o.GetType().Name == typeof(DataTable).Name)
194                enumerable = ((DataTable)o).DefaultView;
195            else
196                enumerable = (IEnumerable)o;
197
198            _pagedDataSource = new PagedDataSource();
199            _pagedDataSource.AllowPaging = true;
200            _pagedDataSource.DataSource = enumerable;
201            _pagedDataSource.PageSize = PageSize;
202            _pagedDataSource.CurrentPageIndex = CurrentPageIndex;
203
204            if (_controlToPage is BaseDataBoundControl)
205                ((BaseDataBoundControl)_controlToPage).DataSource = _pagedDataSource;
206            else if (_controlToPage is BaseDataList)
207                ((BaseDataList)_controlToPage).DataSource = _pagedDataSource;
208            
209            TotalPages = _pagedDataSource.PageCount;
210
211            Visible = (TotalPages > 1);
212        }
213
214        protected override void CreateChildControls()
215        ...{
216            _table.Rows.Clear();
217            Controls.Clear();
218            ClearChildViewState();
219
220            //for Valid XHTML 1.0 Transitional the table-tag cannot be placed directly within span-tag
221            //span-tag is created automatically by the .net control
222            HtmlGenericControl obj = new HtmlGenericControl("object");
223            Controls.Add(obj);
224
225            //Controls.Add(_table);
226            obj.Controls.Add(_table);
227            _table.EnableViewState = false;
228            _table.Width = Unit.Percentage(100);
229            _table.Rows.Add(new TableRow());
230
231            TableCell cell = null;
232
233            cell = new TableCell();
234            _table.Rows[0].Cells.Add(cell);
235            cell.Width = Unit.Percentage(20);
236            cell.HorizontalAlign = HorizontalAlign.Left;
237
238            // first button
239            if ((CurrentPageIndex > 0) && ((Mode == PagerMode.FirstLast) || (Mode == PagerMode.FirstPreviousNextLast)))
240            ...{
241                LinkButton btn = new LinkButton();
242                cell.Controls.Add(btn);
243                if (FirstImageUrl != string.Empty)
244                    btn.Text = string.Format("<img src=\"{0}\" border=\"0\" alt=\"\" />", FirstImageUrl);
245                else
246                    btn.Text = "|&lt;&lt;";
247                btn.CommandArgument = "0";
248                btn.CommandName = "Page";
249                btn.Command += new CommandEventHandler(btn_Command);
250                btn.CausesValidation = false;
251            }
252
253            // previous button
254            if ((CurrentPageIndex > 0) && ((Mode == PagerMode.PreviousNext) || (Mode == PagerMode.FirstPreviousNextLast)))
255            ...{
256                if (cell.Controls.Count > 0)
257                ...{
258                    Literal lit = new Literal();
259                    lit.Text = "&nbsp;";
260                    cell.Controls.Add(