HtmlImage.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 / HtmlImage.cs / 1 / HtmlImage.cs
                        

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

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

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

 
/// 
///     
///       The  
///       class defines the methods, properties, and events
///       for the HtmlImage server control. 
///       This class provides programmatic access on the server to
///       the HTML <img> element.
///    
///  
    [
    ControlBuilderAttribute(typeof(HtmlEmptyTagControlBuilder)) 
    ] 
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    public class HtmlImage : HtmlControl {

        /*
         *  Creates an intrinsic Html IMG control. 
         */
 
        ///  
        /// Initializes a new instance of the  class.
        ///  
        public HtmlImage() : base("img") {
        }

        /* 
         * Alt property
         */ 
 
        /// 
        ///     
        ///       Gets or sets the alternative caption that the
        ///       browser displays if image is either unavailable or has not been downloaded yet.
        ///    
        ///  
        [
        WebCategory("Appearance"), 
        Localizable(true), 
        DefaultValue(""),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) 
        ]
        public string Alt {
            get {
                string s = Attributes["alt"]; 
                return((s != null) ? s : String.Empty);
            } 
            set { 
                Attributes["alt"] = MapStringAttributeToString(value);
            } 
        }

        /*
         * Align property 
         */
 
        ///  
        ///    Gets or sets the alignment of the image with
        ///       surrounding text. 
        /// 
        [
        WebCategory("Appearance"),
        DefaultValue(""), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ] 
        public string Align { 
            get {
                string s = Attributes["align"]; 
                return((s != null) ? s : String.Empty);
            }
            set {
                Attributes["align"] = MapStringAttributeToString(value); 
            }
        } 
 
        /*
         * Border property, size of border in pixels. 
         */

        /// 
        ///     
        ///       Gets or sets the width of image border, in pixels.
        ///     
        ///  
        [
        WebCategory("Appearance"), 
        DefaultValue(0),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public int Border { 
            get {
                string s = Attributes["border"]; 
                return((s != null) ? Int32.Parse(s, CultureInfo.InvariantCulture) : -1); 
            }
            set { 
                Attributes["border"] = MapIntegerAttributeToString(value);
            }
        }
 
        /*
         * Height property 
         */ 

        ///  
        ///    
        ///       Gets or sets
        ///       the height of the image. By default, this is expressed in
        ///       pixels, 
        ///       but can be a expressed as a percentage.
        ///     
        ///  
        [
        WebCategory("Layout"), 
        DefaultValue(100),
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public int Height { 
            get {
                string s = Attributes["height"]; 
                return((s != null) ? Int32.Parse(s, CultureInfo.InvariantCulture) : -1); 
            }
            set { 
                Attributes["height"] = MapIntegerAttributeToString(value);
            }
        }
 
        /*
         * Src property. 
         */ 

        ///  
        ///    
        ///       Gets or sets the name of and path to the
        ///       image file to be displayed. This can be an absolute or
        ///       relative path. 
        ///    
        ///  
        [ 
        WebCategory("Behavior"),
        DefaultValue(""), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
        UrlProperty()
        ]
        public string Src { 
            get {
                string s = Attributes["src"]; 
                return((s != null) ? s : String.Empty); 
            }
            set { 
                Attributes["src"] = MapStringAttributeToString(value);
            }
        }
 
        /*
         * Width property 
         */ 

        ///  
        ///    
        ///       Gets or sets the width of the image. By default, this is
        ///       expressed in pixels,
        ///       but can be a expressed as a percentage. 
        ///    
        ///  
        [ 
        WebCategory("Layout"),
        DefaultValue(100), 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public int Width {
            get { 
                string s = Attributes["width"];
                return((s != null) ? Int32.Parse(s, CultureInfo.InvariantCulture) : -1); 
            } 
            set {
                Attributes["width"] = MapIntegerAttributeToString(value); 
            }
        }

        /* 
         * Override to render unique name attribute.
         * The name attribute is owned by the framework. 
         */ 

        ///  
        /// 
        /// 
        protected override void RenderAttributes(HtmlTextWriter writer) {
            PreProcessRelativeReferenceAttribute(writer, "src"); 

            base.RenderAttributes(writer); 
            writer.Write(" /"); 
        }
 
    }
}

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