Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web.Extensions/ui/WebControls/TemplatePagerField.cs

@@ -0,0 +1,123 @@
+//------------------------------------------------------------------------------
+// <copyright file="TemplatePagerField.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System;
+using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using System.Web;
+using System.Web.Resources;
+using System.Web.UI;
+
+namespace System.Web.UI.WebControls {
+    public class TemplatePagerField : DataPagerField {
+        private int _startRowIndex;
+        private int _maximumRows;
+        private int _totalRowCount;
+        private ITemplate _pagerTemplate;
+
+        private static readonly object EventPagerCommand = new object();
+        private EventHandlerList _events;
+
+        public TemplatePagerField() {
+        }
+                
+        /// <devdoc>
+        /// Indicates the list of event handler delegates for the view. This property is read-only.
+        /// </devdoc>
+        private EventHandlerList Events {
+            get {
+                if (_events == null) {
+                    _events = new EventHandlerList();
+                }
+                return _events;
+            }
+        }
+                
+        /// <devdoc>
+        /// <para> Specifies the <see cref='System.Web.UI.ITemplate' qualify='true'/> that defines how items are rendered. </para>
+        /// </devdoc>
+        [
+            Browsable(false),
+            DefaultValue(null),
+            ResourceDescription("TemplatePagerField_PagerTemplate"),
+            PersistenceMode(PersistenceMode.InnerProperty),
+            TemplateContainer(typeof(DataPagerFieldItem), BindingDirection.TwoWay)
+        ]
+        public virtual ITemplate PagerTemplate {
+            get {
+                return _pagerTemplate;
+            }
+            set {
+                _pagerTemplate = value;
+                OnFieldChanged();
+            }
+        }
+
+        [
+        Category("Action"),
+        ResourceDescription("TemplatePagerField_OnPagerCommand")
+        ]
+        public event EventHandler<DataPagerCommandEventArgs> PagerCommand {
+            add {
+                Events.AddHandler(EventPagerCommand, value);
+            }
+            remove {
+                Events.RemoveHandler(EventPagerCommand, value);
+            }
+        }
+        
+        protected override void CopyProperties(DataPagerField newField) {
+            ((TemplatePagerField)newField).PagerTemplate = PagerTemplate;
+            base.CopyProperties(newField);
+        }
+
+        protected override DataPagerField CreateField() {
+            return new TemplatePagerField();
+        }
+
+        [SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers", MessageId = "0#")]
+        public override void HandleEvent(CommandEventArgs e) {
+            DataPagerFieldItem item = null;
+            DataPagerFieldCommandEventArgs cea = e as DataPagerFieldCommandEventArgs;
+            if (cea != null) {
+                item = cea.Item;
+            }
+
+            DataPagerCommandEventArgs pagerEventArgs = new DataPagerCommandEventArgs(this, _totalRowCount, e, item);
+            OnPagerCommand(pagerEventArgs);
+
+            if (pagerEventArgs.NewStartRowIndex != -1) {
+                DataPager.SetPageProperties(pagerEventArgs.NewStartRowIndex, pagerEventArgs.NewMaximumRows, true);
+            }
+
+        }
+
+        public override void CreateDataPagers(DataPagerFieldItem container, int startRowIndex, int maximumRows, int totalRowCount, int fieldIndex) {
+            _startRowIndex = startRowIndex;
+            _maximumRows = maximumRows;
+            _totalRowCount = totalRowCount;
+
+            if (_pagerTemplate != null) {
+                _pagerTemplate.InstantiateIn(container);
+            }
+        }
+
+        /// <devdoc>
+        /// <para>Raises the <see cref='System.Web.UI.WebControls.ListView.TotalRowCountAvailable'/>event of a <see cref='System.Web.UI.WebControls.ListView'/>.</para>
+        /// </devdoc>
+        [SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers", MessageId = "0#")]
+        protected virtual void OnPagerCommand(DataPagerCommandEventArgs e) {
+            EventHandler<DataPagerCommandEventArgs> handler = (EventHandler<DataPagerCommandEventArgs>)Events[EventPagerCommand];
+            if (handler != null) {
+                handler(this, e);
+            }
+            else {
+                throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, AtlasWeb.TemplatePagerField_UnhandledEvent, "PagerCommand"));
+            }
+        }
+    }
+}