TreeNodeBindingCollection.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / UI / WebControls / TreeNodeBindingCollection.cs / 1305376 / TreeNodeBindingCollection.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

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


    ///  
    ///     Provides a collection of TreeNodeBinding objects
    ///  
    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();
            } 
        }
    } 
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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TreeNodeBindingCollection.cs source code in C# .NET

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