TreeNodeBindingCollection.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 / TreeNodeBindingCollection.cs / 1 / TreeNodeBindingCollection.cs
                        

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

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

 
    /// 
    ///     Provides a collection of TreeNodeBinding objects 
    ///  
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    public sealed class TreeNodeBindingCollection : StateManagedCollection { 
        private static readonly Type[] knownTypes = new Type[] { typeof(TreeNodeBinding) };

        private TreeNodeBinding _defaultBinding;
 
        internal TreeNodeBindingCollection() {
        } 
 
        /// 
        /// Gets the TreeNodeBinding at the specified index 
        /// 
        public TreeNodeBinding this[int i] {
            get {
                return (TreeNodeBinding)((IList)this)[i]; 
            }
            set { 
                ((IList)this)[i] = value; 
            }
        } 

        /// 
        /// Adds a TreeNodeBinding to the collection
        ///  
        public int Add(TreeNodeBinding binding) {
            return ((IList)this).Add(binding); 
        } 

        public bool Contains(TreeNodeBinding binding) { 
            return ((IList)this).Contains(binding);
        }

        public void CopyTo(TreeNodeBinding[] bindingArray, int index) { 
            base.CopyTo(bindingArray, index);
        } 
 
        protected override object CreateKnownType(int index) {
            return new TreeNodeBinding(); 
        }

        private void FindDefaultBinding() {
            _defaultBinding = null; 
            // Look for another binding that would be a good default
            foreach (TreeNodeBinding binding in this) { 
                if (binding.Depth == -1 && binding.DataMember.Length == 0) { 
                    _defaultBinding = binding;
                    break; 
                }
            }
        }
 
        /// 
        ///     Gets a TreeNodeBinding data binding definition for the specified depth or datamember 
        ///  
        internal TreeNodeBinding GetBinding(string dataMember, int depth) {
            TreeNodeBinding bestMatch = null; 
            int match = 0;
            if ((dataMember != null) && (dataMember.Length == 0)) {
                dataMember = null;
            } 

            foreach (TreeNodeBinding binding in this) { 
                if ((binding.Depth == depth)) { 
                    if (String.Equals(binding.DataMember, dataMember, StringComparison.CurrentCultureIgnoreCase)) {
                        return binding; 
                    }
                    else if ((match < 1) && (binding.DataMember.Length == 0)) {
                        bestMatch = binding;
                        match = 1; 
                    }
                } 
                else if (String.Equals(binding.DataMember, dataMember, StringComparison.CurrentCultureIgnoreCase) && 
                    (match < 2) &&
                    (binding.Depth == -1)) { 

                    bestMatch = binding;
                    match = 2;
                } 
            }
 
            if (bestMatch == null) { 
                // Check that the default binding is still suitable (VSWhidbey 358817)
                if (_defaultBinding != null) { 
                    if (_defaultBinding.Depth != -1 || _defaultBinding.DataMember.Length != 0) {
                        // Look for another binding that would be a good default
                        FindDefaultBinding();
                    } 
                    bestMatch = _defaultBinding;
                } 
            } 

            return bestMatch; 
        }

        protected override Type[] GetKnownTypes() {
            return knownTypes; 
        }
 
        public int IndexOf(TreeNodeBinding binding) { 
            return ((IList)this).IndexOf(binding);
        } 

        public void Insert(int index, TreeNodeBinding binding) {
            ((IList)this).Insert(index, binding);
        } 

        protected override void OnClear() { 
            base.OnClear(); 
            _defaultBinding = null;
        } 

        protected override void OnRemoveComplete(int index, object value) {
            if (value == _defaultBinding) {
                FindDefaultBinding(); 
            }
        } 
 
        protected override void OnValidate(object value) {
            base.OnValidate(value); 
            TreeNodeBinding binding = value as TreeNodeBinding;
            if ((binding != null) && (binding.DataMember.Length == 0) && (binding.Depth == -1)) {
                _defaultBinding = binding;
            } 
        }
 
        ///  
        /// Removes a TreeNodeBinding from the collection.
        ///  
        public void Remove(TreeNodeBinding binding) {
            ((IList)this).Remove(binding);
        }
 
        /// 
        /// Removes a TreeNodeBinding from the collection at a given index. 
        ///  
        public void RemoveAt(int index) {
            ((IList)this).RemoveAt(index); 
        }

        protected override void SetDirtyObject(object o) {
            if (o is TreeNodeBinding) { 
                ((TreeNodeBinding)o).SetDirty();
            } 
        } 
    }
}

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