CollectionBuilder.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 / CollectionBuilder.cs / 1 / CollectionBuilder.cs
                        

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

/* 
 * Classes related to complex property support. 
 *
 * Copyright (c) 1999 Microsoft Corporation 
 */

namespace System.Web.UI {
 
    using System;
    using System.Collections; 
    using System.Reflection; 
    using System.Web.Util;
 
    [AttributeUsage(AttributeTargets.Property)]
    internal sealed class IgnoreUnknownContentAttribute : Attribute {
        internal IgnoreUnknownContentAttribute() {}
    } 

 
    ///  
    ///    [To be supplied.]
    ///  
    internal sealed class CollectionBuilder : ControlBuilder {

        private Type _itemType;
        private bool _ignoreUnknownContent; 

        internal CollectionBuilder(bool ignoreUnknownContent) { _ignoreUnknownContent = ignoreUnknownContent; } 
 

        ///  
        ///    [To be supplied.]
        /// 
        public override void Init(TemplateParser parser, ControlBuilder parentBuilder,
                                  Type type, string tagName, string ID, IDictionary attribs) { 

            base.Init(parser, parentBuilder, type /*type*/, tagName, ID, attribs); 
 
            //
 


            PropertyInfo propInfo = parentBuilder.ControlType.GetProperty(
                tagName, BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static | BindingFlags.IgnoreCase); 
            SetControlType(propInfo.PropertyType);
            Debug.Assert(ControlType != null, "ControlType != null"); 
 
            BindingFlags bindingFlags = BindingFlags.Public | BindingFlags.Instance;
 
            // Look for an "item" property on the collection that takes in an integer index
            // (similar to IList::Item)
            propInfo = ControlType.GetProperty("Item", bindingFlags, null, null, new Type[] { typeof(int) }, null);
            if (propInfo == null) { 
                // fall-back on finding a non-specific Item property
                // a type with overloaded indexed properties will result in an exception however 
                propInfo = ControlType.GetProperty("Item", bindingFlags); 
            }
 
            // If we got one, use it to determine the type of the items
            if (propInfo != null)
                _itemType = propInfo.PropertyType;
        } 

        // This code is only executed when used from the desiger 
 
        /// 
        ///    [To be supplied.] 
        /// 
        public override object BuildObject() {
            return this;
        } 

 
        ///  
        ///    [To be supplied.]
        ///  
        public override Type GetChildControlType(string tagName, IDictionary attribs) {

            Type childType = Parser.MapStringToType(tagName, attribs);
 
            // If possible, check if the item is of the required type
            if (_itemType != null) { 
 
                if (!_itemType.IsAssignableFrom(childType)) {
                    if (_ignoreUnknownContent) 
                        return null;

                    string controlTypeName = String.Empty;
                    if (ControlType != null) { 
                        controlTypeName = ControlType.FullName;
                    } 
                    else { 
                        controlTypeName = TagName;
                    } 

                    throw new HttpException(SR.GetString(
                        SR.Invalid_collection_item_type, new String[] { controlTypeName,
                                                                        _itemType.FullName, 
                                                                        tagName,
                                                                        childType.FullName})); 
                } 

            } 

            return childType;
        }
 

        ///  
        ///    [To be supplied.] 
        /// 
        public override void AppendLiteralString(string s) { 

            if (_ignoreUnknownContent)
                return;
 
            // Don't allow non-whitespace literal content
            if (!Util.IsWhiteSpaceString(s)) { 
                throw new HttpException(SR.GetString( 
                    SR.Literal_content_not_allowed, ControlType.FullName, s.Trim()));
            } 
        }
    }

}

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