ObjectListCommandCollection.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / MIT / System / Web / UI / MobileControls / ObjectListCommandCollection.cs / 1305376 / ObjectListCommandCollection.cs

                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

using System; 
using System.Collections; 
using System.ComponentModel;
using System.Diagnostics; 
using System.Globalization;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls; 
using System.Web.UI.HtmlControls;
using System.Security.Permissions; 
 
namespace System.Web.UI.MobileControls
{ 
    /*
     * Object List Command Collection class.
     *
     * Copyright (c) 2000 Microsoft Corporation 
     */
 
    ///  
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    [Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")]
    public class ObjectListCommandCollection : ArrayListCollectionBase, IStateManager
    {
        // ObjectListCommandCollection has a special form of viewstate management. 
        // In normal operation, if you add, remove or modify commands in the
        // collection, the results are saved as part of view state. 
        // 
        // However, when showing the commands for an item, the ObjectList control
        // raises an event that allows the application to alter the commands 
        // specifically for the item. These changes are considered local to the
        // item, and are not saved.
        //
        // To do this, the class uses a private state, declared in the MarkState 
        // enumeration below. The following sequence of events are used:
        // 
        // 1) Class is created. MarkState is set to MarkState.NotMarked. 
        // 2) Class is initialized from persistent values.
        // 3) Framework calls TrackViewState. MarkState is set to MarkState.MArked. 
        // 4) Properties can be changed. Changes are reflected in viewstate.
        // 5) Just before raising the ShowItemCommands event, the ObjectList control
        //    calls GlobalStateSet. PreSaveViewState is called to create a
        //    snapshot of viewstate, and MarkState is set to MarkState.PostMarked. 
        // 6) If any changes are made after this, they will be ignored for view state
        //    purposes. 
        // 7) The framework calls SaveViewState. Instead of the current view state 
        //    (which would include the changes made in Step 6), the snapshot view state
        //     from step 5 is returned. 

        private enum MarkState
        {
            NotMarked, 
            Marked,
            PostMarked, 
        } 

        private MarkState _markState = MarkState.NotMarked; 
        private bool _dirty;
        private String[] _savedState;

        internal ObjectListCommandCollection() 
        {
        } 
 
        /// 
        public ObjectListCommand this[int index] 
        {
            get
            {
                return (ObjectListCommand)Items[index]; 
            }
        } 
 
        /// 
        public void Clear() 
        {
            foreach (ObjectListCommand command in Items)
            {
                command.Owner = null; 
            }
            Items.Clear(); 
            SetDirty(); 
        }
 
        /// 
        public void Add(ObjectListCommand command)
        {
            AddAt(-1, command); 
        }
 
        ///  
        public void AddAt(int index, ObjectListCommand command)
        { 
            if (index == -1)
            {
                Items.Add(command);
            } 
            else
            { 
                Items.Insert(index, command); 
            }
            command.Owner = this; 
            SetDirty();
        }

        ///  
        public void Remove(String s)
        { 
            RemoveAt(IndexOf(s)); 
        }
 
        /// 
        public void RemoveAt(int index)
        {
            (this[index]).Owner = null; 
            Items.RemoveAt(index);
            SetDirty(); 
        } 

        ///  
        public int IndexOf(String s)
        {
            int index = 0;
            foreach (ObjectListCommand command in Items) 
            {
                if (String.Compare(command.Name, s, StringComparison.OrdinalIgnoreCase) == 0) 
                { 
                    return index;
                } 
                index++;
            }
            return -1;
        } 

        internal void GlobalStateSet() 
        { 
            // Base commands have been set. From here, commands will only be
            // modified on a per-item, non-persistent basis. 

            PreSaveViewState();
            _markState = MarkState.PostMarked;
        } 

        internal void SetDirty() 
        { 
            if (_markState == MarkState.Marked)
            { 
                _dirty = true;
            }
        }
 
        /////////////////////////////////////////////////////////////////////////
        //  STATE MANAGEMENT 
        ///////////////////////////////////////////////////////////////////////// 

        private void PreSaveViewState() 
        {
            if (_dirty)
            {
                ArrayList commands = Items; 
                _savedState = new String[commands.Count * 2];
                int i = 0; 
                foreach (ObjectListCommand command in commands) 
                {
                    _savedState[i] = command.Name; 
                    _savedState[i + 1] = command.Text;
                    i += 2;
                }
            } 
            else
            { 
                _savedState = null; 
            }
        } 

        /// 
        protected bool IsTrackingViewState
        { 
            get
            { 
                return _markState != MarkState.NotMarked; 
            }
        } 

        /// 
        protected void TrackViewState()
        { 
            _markState = MarkState.Marked;
        } 
 
        /// 
        protected void LoadViewState(Object state) 
        {
            if (state != null)
            {
                String[] commandStates = (String[])state; 
                int count = commandStates.Length;
                Clear(); 
                for (int i = 0; i < count; i += 2) 
                {
                    Add(new ObjectListCommand(commandStates[i], commandStates[i + 1])); 
                }
            }
        }
 
        /// 
        protected Object SaveViewState() 
        { 
            if (_markState == MarkState.Marked)
            { 
                PreSaveViewState();
            }
            return _savedState;
        } 

        #region Implementation of IStateManager 
        ///  
        bool IStateManager.IsTrackingViewState {
            get { 
                return IsTrackingViewState;
            }
        }
 
        /// 
        void IStateManager.LoadViewState(object state) { 
            LoadViewState(state); 
        }
 
        /// 
        void IStateManager.TrackViewState() {
            TrackViewState();
        } 

        ///  
        object IStateManager.SaveViewState() { 
            return SaveViewState();
        } 
        #endregion
    }
}
 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

using System; 
using System.Collections; 
using System.ComponentModel;
using System.Diagnostics; 
using System.Globalization;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls; 
using System.Web.UI.HtmlControls;
using System.Security.Permissions; 
 
namespace System.Web.UI.MobileControls
{ 
    /*
     * Object List Command Collection class.
     *
     * Copyright (c) 2000 Microsoft Corporation 
     */
 
    ///  
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    [Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")]
    public class ObjectListCommandCollection : ArrayListCollectionBase, IStateManager
    {
        // ObjectListCommandCollection has a special form of viewstate management. 
        // In normal operation, if you add, remove or modify commands in the
        // collection, the results are saved as part of view state. 
        // 
        // However, when showing the commands for an item, the ObjectList control
        // raises an event that allows the application to alter the commands 
        // specifically for the item. These changes are considered local to the
        // item, and are not saved.
        //
        // To do this, the class uses a private state, declared in the MarkState 
        // enumeration below. The following sequence of events are used:
        // 
        // 1) Class is created. MarkState is set to MarkState.NotMarked. 
        // 2) Class is initialized from persistent values.
        // 3) Framework calls TrackViewState. MarkState is set to MarkState.MArked. 
        // 4) Properties can be changed. Changes are reflected in viewstate.
        // 5) Just before raising the ShowItemCommands event, the ObjectList control
        //    calls GlobalStateSet. PreSaveViewState is called to create a
        //    snapshot of viewstate, and MarkState is set to MarkState.PostMarked. 
        // 6) If any changes are made after this, they will be ignored for view state
        //    purposes. 
        // 7) The framework calls SaveViewState. Instead of the current view state 
        //    (which would include the changes made in Step 6), the snapshot view state
        //     from step 5 is returned. 

        private enum MarkState
        {
            NotMarked, 
            Marked,
            PostMarked, 
        } 

        private MarkState _markState = MarkState.NotMarked; 
        private bool _dirty;
        private String[] _savedState;

        internal ObjectListCommandCollection() 
        {
        } 
 
        /// 
        public ObjectListCommand this[int index] 
        {
            get
            {
                return (ObjectListCommand)Items[index]; 
            }
        } 
 
        /// 
        public void Clear() 
        {
            foreach (ObjectListCommand command in Items)
            {
                command.Owner = null; 
            }
            Items.Clear(); 
            SetDirty(); 
        }
 
        /// 
        public void Add(ObjectListCommand command)
        {
            AddAt(-1, command); 
        }
 
        ///  
        public void AddAt(int index, ObjectListCommand command)
        { 
            if (index == -1)
            {
                Items.Add(command);
            } 
            else
            { 
                Items.Insert(index, command); 
            }
            command.Owner = this; 
            SetDirty();
        }

        ///  
        public void Remove(String s)
        { 
            RemoveAt(IndexOf(s)); 
        }
 
        /// 
        public void RemoveAt(int index)
        {
            (this[index]).Owner = null; 
            Items.RemoveAt(index);
            SetDirty(); 
        } 

        ///  
        public int IndexOf(String s)
        {
            int index = 0;
            foreach (ObjectListCommand command in Items) 
            {
                if (String.Compare(command.Name, s, StringComparison.OrdinalIgnoreCase) == 0) 
                { 
                    return index;
                } 
                index++;
            }
            return -1;
        } 

        internal void GlobalStateSet() 
        { 
            // Base commands have been set. From here, commands will only be
            // modified on a per-item, non-persistent basis. 

            PreSaveViewState();
            _markState = MarkState.PostMarked;
        } 

        internal void SetDirty() 
        { 
            if (_markState == MarkState.Marked)
            { 
                _dirty = true;
            }
        }
 
        /////////////////////////////////////////////////////////////////////////
        //  STATE MANAGEMENT 
        ///////////////////////////////////////////////////////////////////////// 

        private void PreSaveViewState() 
        {
            if (_dirty)
            {
                ArrayList commands = Items; 
                _savedState = new String[commands.Count * 2];
                int i = 0; 
                foreach (ObjectListCommand command in commands) 
                {
                    _savedState[i] = command.Name; 
                    _savedState[i + 1] = command.Text;
                    i += 2;
                }
            } 
            else
            { 
                _savedState = null; 
            }
        } 

        /// 
        protected bool IsTrackingViewState
        { 
            get
            { 
                return _markState != MarkState.NotMarked; 
            }
        } 

        /// 
        protected void TrackViewState()
        { 
            _markState = MarkState.Marked;
        } 
 
        /// 
        protected void LoadViewState(Object state) 
        {
            if (state != null)
            {
                String[] commandStates = (String[])state; 
                int count = commandStates.Length;
                Clear(); 
                for (int i = 0; i < count; i += 2) 
                {
                    Add(new ObjectListCommand(commandStates[i], commandStates[i + 1])); 
                }
            }
        }
 
        /// 
        protected Object SaveViewState() 
        { 
            if (_markState == MarkState.Marked)
            { 
                PreSaveViewState();
            }
            return _savedState;
        } 

        #region Implementation of IStateManager 
        ///  
        bool IStateManager.IsTrackingViewState {
            get { 
                return IsTrackingViewState;
            }
        }
 
        /// 
        void IStateManager.LoadViewState(object state) { 
            LoadViewState(state); 
        }
 
        /// 
        void IStateManager.TrackViewState() {
            TrackViewState();
        } 

        ///  
        object IStateManager.SaveViewState() { 
            return SaveViewState();
        } 
        #endregion
    }
}
 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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