HtmlInputText.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / HtmlControls / HtmlInputText.cs / 1 / HtmlInputText.cs
                        

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

/* 
 * HtmlInputText.cs 
 *
 * Copyright (c) 2000 Microsoft Corporation 
 */

namespace System.Web.UI.HtmlControls {
    using System.ComponentModel; 
    using System;
    using System.Collections; 
    using System.Collections.Specialized; 
    using System.Globalization;
    using System.Web; 
    using System.Web.UI;
    using System.Security.Permissions;

 
/// 
///     
///       The  
///       class defines the methods, properties, and events for the HtmlInputText server
///       control. This class allows programmatic access to the HTML <input type= 
///       text>
///       and <input type=
///       password> elements on the server.
///     
/// 
    [ 
    DefaultEvent("ServerChange"), 
    SupportsEventValidation,
    ValidationProperty("Value"), 
    ]
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    public class HtmlInputText : HtmlInputControl, IPostBackDataHandler { 

        private static readonly object EventServerChange = new object(); 
 
        /*
         * Creates an intrinsic Html INPUT type=text control. 
         */

        public HtmlInputText() : base("text") {
        } 

        /* 
         * Creates an intrinsic Html INPUT type=text control. 
         */
 
        /// 
        /// 
        public HtmlInputText(string type) : base(type) {
        } 

        /* 
         * The property for the maximum characters allowed. 
         */
 
        /// 
        ///    
        ///       Gets or sets the maximum number of characters that
        ///       can be typed into the text box. 
        ///    
        ///  
        [ 
        WebCategory("Behavior"),
        DefaultValue(""), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public int MaxLength {
            get { 
                string s = (string)ViewState["maxlength"];
                return((s != null) ? Int32.Parse(s, CultureInfo.InvariantCulture) : -1); 
            } 

            set { 
                Attributes["maxlength"] = MapIntegerAttributeToString(value);
            }
        }
 
        //
 
        /* 
         * The property for the width of the TextBox in characters.
         */ 

        /// 
        ///    
        ///       Gets or sets the width of a text box, in characters. 
        ///    
        ///  
        [ 
        WebCategory("Appearance"),
        DefaultValue(-1), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public int Size {
            get { 
                string s = Attributes["size"];
                return((s != null) ? Int32.Parse(s, CultureInfo.InvariantCulture) : -1); 
            } 
            set {
                Attributes["size"] = MapIntegerAttributeToString(value); 
            }
        }

        /* 
         * Value property.
         */ 
 
        /// 
        ///     
        ///       Gets or sets the
        ///       contents of a text box.
        ///    
        ///  
        public override string Value {
            get { 
                string s = Attributes["value"]; 
                return((s != null) ? s : String.Empty);
            } 
            set {
                Attributes["value"] = MapStringAttributeToString(value);
            }
        } 

 
        [ 
        WebCategory("Action"),
        WebSysDescription(SR.HtmlInputText_ServerChange) 
        ]
        public event EventHandler ServerChange {
            add {
                Events.AddHandler(EventServerChange, value); 
            }
            remove { 
                Events.RemoveHandler(EventServerChange, value); 
            }
        } 

        /*
         * Method used to raise the OnServerChange event.
         */ 

        ///  
        ///  
        protected virtual void OnServerChange(EventArgs e) {
            EventHandler handler = (EventHandler)Events[EventServerChange]; 
            if (handler != null) handler(this, e);
        }

        /* 
         *
         */ 
 
        /// 
        ///  
        /// 
        protected internal override void OnPreRender(EventArgs e) {
            base.OnPreRender(e);
 
            bool disabled = Disabled;
            if (!disabled && Page != null) { 
                Page.RegisterEnabledControl(this); 
            }
 
            // if no change handler, no need to save posted property unless we are disabled;
            // VSWhidbey 419040: We should never save password value in ViewState
            if ((!disabled && Events[EventServerChange] == null) ||
                Type.Equals("password", StringComparison.OrdinalIgnoreCase)) { 
                ViewState.SetItemDirty("value", false);
            } 
        } 

        protected override void RenderAttributes(HtmlTextWriter writer) { 
            base.RenderAttributes(writer);

            if (Page != null) {
                Page.ClientScript.RegisterForEventValidation(RenderedNameAttribute); 
            }
        } 
 
        /*
         * Method of IPostBackDataHandler interface to process posted data. 
         * InputText process a newly posted value.
         */

        ///  
        /// 
        ///  
        bool IPostBackDataHandler.LoadPostData(string postDataKey, NameValueCollection postCollection) { 
            return LoadPostData(postDataKey, postCollection);
        } 


        /// 
        ///  
        /// 
        protected virtual bool LoadPostData(string postDataKey, NameValueCollection postCollection) { 
            string current = Value; 
            string inputString = postCollection.GetValues(postDataKey)[0];
 
            if (!current.Equals(inputString)) {
                ValidateEvent(postDataKey);

                Value = inputString; 
                return true;
            } 
 
            return false;
        } 

        /*
         * Method of IPostBackDataHandler interface which is invoked whenever posted data
         * for a control has changed.  InputText fires an OnServerChange event. 
         */
 
        ///  
        /// 
        ///  
        void IPostBackDataHandler.RaisePostDataChangedEvent() {
            RaisePostDataChangedEvent();
        }
 

        ///  
        ///  
        /// 
        protected virtual void RaisePostDataChangedEvent() { 
            OnServerChange(EventArgs.Empty);
        }
    }
}

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