WebPartCollection.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 / WebParts / WebPartCollection.cs / 1 / WebPartCollection.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 
namespace System.Web.UI.WebControls.WebParts {
 
    using System; 
    using System.Collections;
    using System.Diagnostics; 
    using System.Globalization;
    using System.Security.Permissions;

    ///  
    /// Read-only collection of WebParts.  Collection cannot be modified after contstruction.
    ///  
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    public sealed class WebPartCollection : ReadOnlyCollectionBase {
 
        public WebPartCollection() {
        }

        public WebPartCollection(ICollection webParts) { 
            if (webParts == null) {
                throw new ArgumentNullException("webParts"); 
            } 

            foreach (object obj in webParts) { 
                if (obj == null) {
                    throw new ArgumentException(SR.GetString(SR.Collection_CantAddNull), "webParts");
                }
                if (!(obj is WebPart)) { 
                    throw new ArgumentException(SR.GetString(SR.Collection_InvalidType, "WebPart"), "webParts");
                } 
                InnerList.Add(obj); 
            }
        } 

        internal int Add(WebPart value) {
            Debug.Assert(value != null);
            return InnerList.Add(value); 
        }
 
        public bool Contains(WebPart value) { 
            return InnerList.Contains(value);
        } 

        public int IndexOf(WebPart value) {
            return InnerList.IndexOf(value);
        } 

        public WebPart this[int index] { 
            get { 
                return (WebPart) InnerList[index];
            } 
        }

        /// 
        /// Returns the WebPart with the specified id, or the GenericWebPart containing a control with 
        /// the specified id, or the ProxyWebPart with OriginalID or GenericWebPartID equal to the
        /// specified id, performing a case-insensitive comparison.  Returns null if there are no matches. 
        ///  
        public WebPart this[string id] {
            // PERF: Use a hashtable for lookup, instead of a linear search 
            get {
                foreach (WebPart webPart in InnerList) {
                    if (String.Equals(webPart.ID, id, StringComparison.OrdinalIgnoreCase)) {
                        return webPart; 
                    }
 
                    GenericWebPart genericWebPart = webPart as GenericWebPart; 
                    if (genericWebPart != null) {
                        Control control = genericWebPart.ChildControl; 
                        if (control != null) {
                            if (String.Equals(control.ID, id, StringComparison.OrdinalIgnoreCase)) {
                                return genericWebPart;
                            } 
                        }
                    } 
 
                    ProxyWebPart proxyWebPart = webPart as ProxyWebPart;
                    if (proxyWebPart != null) { 
                        if ((String.Equals(proxyWebPart.OriginalID, id, StringComparison.OrdinalIgnoreCase)) ||
                            (String.Equals(proxyWebPart.GenericWebPartID, id, StringComparison.OrdinalIgnoreCase))) {
                            return proxyWebPart;
                        } 
                    }
                } 
 
                return null;
            } 
        }

        /// 
        /// Copies contents from the collection to a specified array with a 
        /// specified starting index.
        ///  
        public void CopyTo(WebPart[] array, int index) { 
            InnerList.CopyTo(array, index);
        } 

    }
}

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