Command.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / MIT / System / Web / UI / MobileControls / Command.cs / 1305376 / Command.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

using System; 
using System.Collections; 
using System.Collections.Specialized;
using System.ComponentModel; 
using System.ComponentModel.Design;
using System.Diagnostics;
using System.Drawing.Design;
using System.Web; 
using System.Web.UI;
using System.Web.UI.WebControls; 
using System.Security.Permissions; 

namespace System.Web.UI.MobileControls 
{

    /*
     * Mobile Command class. 
     *
     * Copyright (c) 2000 Microsoft Corporation 
     */ 
    /// 
    [ 
        DataBindingHandler("System.Web.UI.Design.TextDataBindingHandler, " + AssemblyRef.SystemDesign),
        DefaultEvent("Click"),
        DefaultProperty("Text"),
        Designer(typeof(System.Web.UI.Design.MobileControls.CommandDesigner)), 
        DesignerAdapter(typeof(System.Web.UI.Design.MobileControls.Adapters.DesignerCommandAdapter)),
        ToolboxData("<{0}:Command runat=\"server\">Command"), 
        ToolboxItem("System.Web.UI.Design.WebControlToolboxItem, " + AssemblyRef.SystemDesign) 
    ]
    [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 Command : TextControl, IPostBackEventHandler, IPostBackDataHandler
    { 
        private static readonly Object EventClick = new Object ();
        private static readonly Object EventItemCommand = new Object (); 
 
        /// 
        protected override void OnPreRender(EventArgs e) 
        {
            base.OnPreRender(e);
            // If this control will be rendered as an image
 
            Debug.Assert(ImageUrl != null);
            if (MobilePage != null 
                && ImageUrl.Length != 0 
                && MobilePage.Device.SupportsImageSubmit)
            { 
                // HTML input controls of type image postback as name.x and
                // name.y which is not associated with this control by default
                // in Page.ProcessPostData().
                MobilePage.RegisterRequiresPostBack(this); 
            }
        } 
 
        /// 
        protected bool LoadPostData(String key, NameValueCollection data) 
        {
            bool dataChanged;
            bool handledByAdapter =
                Adapter.LoadPostData(key, data, null, out dataChanged); 

            // If the adapter handled the post back and set dataChanged this 
            // was an image button (responds with ID.x and ID.y). 
            if (handledByAdapter)
            { 
                if(dataChanged)
                {
                    Page.RegisterRequiresRaiseEvent(this);
                } 
            }
            // Otherwise if the adapter did not handle the past back, use 
            // the same method as Page.ProcessPostData(). 
            else if(data[key] != null)
            { 
                Page.RegisterRequiresRaiseEvent(this);
            }
            return false;  // no need to raise PostDataChangedEvent.
        } 

        ///  
        protected void RaisePostDataChangedEvent() { 
        }
 
        /// 
        [
            Bindable(true),
            DefaultValue(""), 
            MobileCategory(SR.Category_Behavior),
            MobileSysDescription(SR.Command_SoftkeyLabel) 
        ] 
        public String SoftkeyLabel
        { 
            get
            {
                String s = (String) ViewState["Softkeylabel"];
                return((s != null) ? s : String.Empty); 
            }
            set 
            { 
                ViewState["Softkeylabel"] = value;
            } 
        }

        /// 
        [ 
            Bindable(true),
            DefaultValue(""), 
            MobileCategory(SR.Category_Behavior), 
            MobileSysDescription(SR.Command_CommandName)
        ] 
        public String CommandName
        {
            get
            { 
                String s = (String) ViewState["CommandName"];
                return((s != null) ? s : String.Empty); 
            } 
            set
            { 
                ViewState["CommandName"] = value;
            }
        }
 
        /// 
        [ 
            Bindable(true), 
            DefaultValue(""),
            MobileCategory(SR.Category_Behavior), 
            MobileSysDescription(SR.Command_CommandArgument)
        ]
        public String CommandArgument
        { 
            get
            { 
                String s = (String) ViewState["CommandArgument"]; 
                return((s != null) ? s : String.Empty);
            } 
            set
            {
                ViewState["CommandArgument"] = value;
            } 
        }
 
        ///  
        [
            Bindable(true), 
            DefaultValue(""),
            Editor(typeof(System.Web.UI.Design.MobileControls.ImageUrlEditor),
                   typeof(UITypeEditor)),
            MobileCategory(SR.Category_Appearance), 
            MobileSysDescription(SR.Image_ImageUrl)
        ] 
        public String ImageUrl 
        {
            get 
            {
                String s = (String) ViewState["ImageUrl"];
                return((s != null) ? s : String.Empty);
            } 
            set
            { 
                ViewState["ImageUrl"] = value; 
            }
        } 

        /// 
        [
            Bindable(false), 
            DefaultValue(true),
            MobileCategory(SR.Category_Behavior), 
            MobileSysDescription(SR.Command_CausesValidation) 
        ]
        public bool CausesValidation 
        {
            get
            {
                object b = ViewState["CausesValidation"]; 
                return((b == null) ? true : (bool)b);
            } 
            set 
            {
                ViewState["CausesValidation"] = value; 
            }
        }

        ///  
        [
            Bindable(true), 
            DefaultValue(CommandFormat.Button), 
            MobileCategory(SR.Category_Appearance),
            MobileSysDescription(SR.Command_Format) 
        ]
        public CommandFormat Format
        {
            get 
            {
                Object o = ViewState["Format"]; 
                return((o == null) ? CommandFormat.Button : (CommandFormat)o); 
            }
            set 
            {
                ViewState["Format"] = value;
            }
        } 

        ///  
        protected virtual void OnClick(EventArgs e) 
        {
            EventHandler onClickHandler = (EventHandler)Events[EventClick]; 
            if (onClickHandler != null)
            {
                onClickHandler(this,e);
            } 
        }
 
        ///  
        protected virtual void OnItemCommand(CommandEventArgs e)
        { 
            CommandEventHandler onItemCommandHandler = (CommandEventHandler)Events[EventItemCommand];
            if (onItemCommandHandler != null)
            {
                onItemCommandHandler(this,e); 
            }
 
            RaiseBubbleEvent (this, e); 
        }
 
        /// 
        [
            MobileCategory(SR.Category_Action),
            MobileSysDescription(SR.Command_OnClick) 
        ]
        public event EventHandler Click 
        { 
            add
            { 
                Events.AddHandler(EventClick, value);
            }
            remove
            { 
                Events.RemoveHandler(EventClick, value);
            } 
        } 

        ///  
        [
            MobileCategory(SR.Category_Action),
            MobileSysDescription(SR.Command_OnItemCommand)
        ] 
        public event CommandEventHandler ItemCommand
        { 
            add 
            {
                Events.AddHandler(EventItemCommand, value); 
            }
            remove
            {
                Events.RemoveHandler(EventItemCommand, value); 
            }
        } 
 
        /// 
        ///  
        protected void RaisePostBackEvent(String argument)
        {
            if (CausesValidation)
            { 
                MobilePage.Validate();
            } 
 
            // It is legitimate to reset the form back to the first page
            // after a form submit. 
            Form.CurrentPage = 1;

            OnClick (EventArgs.Empty);
            OnItemCommand (new CommandEventArgs(CommandName, CommandArgument)); 
        }
 
        ///  
        protected override bool IsFormSubmitControl()
        { 
            return true;
        }

        #region IPostBackEventHandler implementation 
        void IPostBackEventHandler.RaisePostBackEvent(String eventArgument) {
            RaisePostBackEvent(eventArgument); 
        } 
        #endregion
 
        #region IPostBackDataHandler implementation
        bool IPostBackDataHandler.LoadPostData(String key, NameValueCollection data) {
            return LoadPostData(key, data);
        } 

        void IPostBackDataHandler.RaisePostDataChangedEvent() { 
            RaisePostDataChangedEvent(); 
        }
        #endregion 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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Command.cs source code in C# .NET

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