WmlTextBoxAdapter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

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

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

using System; 
using System.Globalization; 
using System.IO;
using System.Web; 
using System.Web.UI;
using System.Web.UI.MobileControls;
using System.Security.Permissions;
 
#if COMPILING_FOR_SHIPPED_SOURCE
namespace System.Web.UI.MobileControls.ShippedAdapterSource 
#else 
namespace System.Web.UI.MobileControls.Adapters
#endif 

{

    /* 
     * WmlTextBoxAdapter 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 WmlTextBoxAdapter : WmlControlAdapter 
    {
        private String _staticValue; 
 
        /// 
        protected new TextBox Control 
        {
            get
            {
                return (TextBox)base.Control; 
            }
        } 
 
        /// 
        public override void OnInit(EventArgs e) 
        {
            _staticValue = Control.Text;
            base.OnInit(e);
        } 

        ///  
        public override void Render(WmlMobileTextWriter writer) 
        {
            String value = Control.Text; 
            bool requiresRandomID = RequiresRandomID();

            writer.EnterLayout(Style);
            if (Control.Password) 
            {
                value = String.Empty; 
            } 

            if (!PageAdapter.RequiresValueAttributeInInputTag()) 
            {
                writer.AddFormVariable(Control.ClientID, value, requiresRandomID);
            }
            else 
            {
                // This is to make sure an id is determined in the first 
                // pass, and this is done in AddFormVariable as well. 
                writer.MapClientIDToShortName(Control.ClientID, requiresRandomID);
            } 

            String format = ((IAttributeAccessor)Control).GetAttribute("wmlFormat");
            if (String.IsNullOrEmpty(format))
            { 
                if (Control.Numeric)
                { 
                    format = "*N"; 
                }
                else 
                {
                    format = null;
                }
            } 

            writer.RenderTextBox(Control.ClientID, 
                                 value, 
                                 format,
                                 Control.Title, 
                                 Control.Password,
                                 Control.Size,
                                 Control.MaxLength,
                                 requiresRandomID, 
                                 Control.BreakAfter);
            writer.ExitLayout(Style); 
        } 

        private bool RequiresRandomID() 
        {
            String randomID = ((IAttributeAccessor)Control).GetAttribute("useRandomID");
            if (randomID != null)
            { 
                return String.Compare(randomID, "true", StringComparison.OrdinalIgnoreCase) == 0;
            } 
            else 
            {
                return Control.Password; 
            }
        }

        ///  
        protected override String GetPostBackValue()
        { 
            // Optimization - if viewstate is enabled for this control, and the 
            // postback returns to this page, we just let it do the trick.
 
            if (Control.Form.Action.Length > 0 || (!IsViewStateEnabled() && Control.Text != _staticValue))
            {
                return Control.Text;
            } 
            else
            { 
                return null; 
            }
        } 

        private bool IsViewStateEnabled()
        {
            Control ctl = Control; 
            while (ctl != null)
            { 
                if (!ctl.EnableViewState) 
                {
                    return false; 
                }
                ctl = ctl.Parent;
            }
            return true; 
        }
 
    } 

} 


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

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