Literal.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebControls / Literal.cs / 1 / Literal.cs
                        

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

namespace System.Web.UI.WebControls { 
 
    using System;
    using System.ComponentModel; 
    using System.Globalization;
    using System.Web;
    using System.Web.UI;
    using System.Security.Permissions; 

 
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    public class LiteralControlBuilder : ControlBuilder { 

        public override bool AllowWhitespaceLiterals() {
            return false;
        } 

        public override void AppendLiteralString(string s) { 
 
            // If it's just a white space string, delegate to the base
            if (Util.IsWhiteSpaceString(s)) { 
                base.AppendLiteralString(s);
                return;
            }
 
            // Treat the inner text as if it had been set on the 'Text' attribute
            PreprocessAttribute(String.Empty /*filter*/, "text", s, false /*mainDirectiveMode*/); 
        } 

 
        public override void AppendSubBuilder(ControlBuilder subBuilder) {
            throw new HttpException(SR.GetString(SR.Control_does_not_allow_children,
                ControlType.ToString()));
        } 
    }
 
    // The reason we define this empty override in the WebControls namespace is 
    // to expose it as a control that can be used on a page (ASURT 54683)
    // E.g.  

    [
    DataBindingHandler("System.Web.UI.Design.TextDataBindingHandler, " + AssemblyRef.SystemDesign),
    DefaultProperty("Text"), 
    Designer("System.Web.UI.Design.WebControls.LiteralDesigner, " + AssemblyRef.SystemDesign),
    ControlBuilderAttribute(typeof(LiteralControlBuilder)), 
    ] 
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    public class Literal : Control, ITextControl {


        ///  
        ///     [To be supplied.]
        ///  
        [ 
        DefaultValue(LiteralMode.Transform),
        WebCategory("Behavior"), 
        WebSysDescription(SR.Literal_Mode)
        ]
        public LiteralMode Mode {
            get { 
                object mode = ViewState["Mode"];
                return mode == null ? LiteralMode.Transform : (LiteralMode)mode; 
            } 
            set {
                if ((value < LiteralMode.Transform) || (value > LiteralMode.Encode)) { 
                    throw new ArgumentOutOfRangeException("value");
                }

                ViewState["Mode"] = value; 
            }
        } 
 

        ///  
        ///     [To be supplied.]
        /// 
        [
        Localizable(true), 
        Bindable(true),
        WebCategory("Appearance"), 
        DefaultValue(""), 
        WebSysDescription(SR.Literal_Text),
        ] 
        public string Text {
            get {
                string s = (string)ViewState["Text"];
                return (s != null) ? s : String.Empty; 
            }
            set { 
                ViewState["Text"] = value; 
            }
        } 


        /// 
        ///  
        ///     [To be supplied.]
        ///  
        protected override void AddParsedSubObject(object obj) { 
            if (obj is LiteralControl) {
                Text = ((LiteralControl)obj).Text; 
            }
            else {
                throw new HttpException(SR.GetString(SR.Cannot_Have_Children_Of_Type, "Literal", obj.GetType().Name.ToString(CultureInfo.InvariantCulture)));
            } 
        }
 
 
        /// 
        ///     [To be supplied.] 
        /// 
        protected override ControlCollection CreateControlCollection() {
            return new EmptyControlCollection(this);
        } 

 
        ///  
        /// 
        [ 
        EditorBrowsable(EditorBrowsableState.Never),
        ]
        public override void Focus() {
            throw new NotSupportedException(SR.GetString(SR.NoFocusSupport, this.GetType().Name)); 
        }
 
 

        ///  
        ///     [To be supplied.]
        /// 
        protected internal override void Render(HtmlTextWriter writer) {
            string text = Text; 
            if (text.Length != 0) {
                if (Mode != LiteralMode.Encode) { 
                    writer.Write(text); 
                    return;
                } 

                HttpUtility.HtmlEncode(text, writer);
            }
        } 
    }
}

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