DbParameterCollectionHelper.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / EntityClient / DbParameterCollectionHelper.cs / 1305376 / DbParameterCollectionHelper.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

namespace System.Data.EntityClient 
{
    using System;
    using System.Collections.Generic;
    using System.ComponentModel; 
    using System.Data;
    using System.Data.Common; 
    using System.Data.ProviderBase; 
    using System.Diagnostics;
    using System.Globalization; 
    using System.Runtime.InteropServices;

    public sealed partial class EntityParameterCollection : DbParameterCollection {
        private List _items; 

        override public int Count { 
            get { 

                return ((null != _items) ? _items.Count : 0); 
            }
        }

        private List InnerList { 
            get {
                List items = _items; 
 
                if (null == items) {
                    items = new List(); 
                    _items = items;
                }
                return items;
            } 
        }
 
        override public bool IsFixedSize { 
            get {
                return ((System.Collections.IList)InnerList).IsFixedSize; 
            }
        }

        override public bool IsReadOnly { 
            get {
                return ((System.Collections.IList)InnerList).IsReadOnly; 
            } 
        }
 
        override public bool IsSynchronized {
            get {
                return ((System.Collections.ICollection)InnerList).IsSynchronized;
            } 
        }
 
        override public object SyncRoot { 
            get {
                return ((System.Collections.ICollection)InnerList).SyncRoot; 
            }
        }

        [ 
        EditorBrowsableAttribute(EditorBrowsableState.Never)
        ] 
        override public int Add(object value) { 
            OnChange();
            ValidateType(value); 
            Validate(-1, value);
            InnerList.Add((EntityParameter)value);
            return Count-1;
        } 

        override public void AddRange(System.Array values) { 
            OnChange(); 
            if (null == values) {
                throw ADP.ArgumentNull("values"); 
            }
            foreach(object value in values) {
                ValidateType(value);
            } 
            foreach(EntityParameter value in values) {
                Validate(-1, value); 
                InnerList.Add((EntityParameter)value); 
            }
        } 

        private int CheckName(string parameterName) {
            int index = IndexOf(parameterName);
            if (index < 0) { 
                throw ADP.ParametersSourceIndex(parameterName, this, ItemType);
            } 
            return index; 
        }
 
        override public void Clear() {
            OnChange();
            List items = InnerList;
 
            if (null != items) {
                foreach(EntityParameter item in items) { 
                    item.ResetParent(); 
                }
                items.Clear(); 
            }
        }

        override public bool Contains(object value) { 
            return (-1 != IndexOf(value));
        } 
 
        override public void CopyTo(Array array, int index) {
            ((System.Collections.ICollection)InnerList).CopyTo(array, index); 
        }

        override public System.Collections.IEnumerator GetEnumerator() {
            return ((System.Collections.ICollection)InnerList).GetEnumerator(); 
        }
 
        override protected DbParameter GetParameter(int index) { 
            RangeCheck(index);
            return InnerList[index]; 
        }

        override protected DbParameter GetParameter(string parameterName) {
            int index = IndexOf(parameterName); 
            if (index < 0) {
                throw ADP.ParametersSourceIndex(parameterName, this, ItemType); 
            } 
            return InnerList[index];
        } 

        private static int IndexOf(System.Collections.IEnumerable items, string parameterName) {
            if (null != items) {
                int i = 0; 

                foreach(EntityParameter parameter in items) { 
                    if (0 == ADP.SrcCompare(parameterName, parameter.ParameterName)) { 
                        return i;
                    } 
                    ++i;
                }
                i = 0;
 
                foreach(EntityParameter parameter in items) {
                    if (0 == ADP.DstCompare(parameterName, parameter.ParameterName)) { 
                        return i; 
                    }
                    ++i; 
                }
            }
            return -1;
        } 

        override public int IndexOf(string parameterName) { 
            return IndexOf(InnerList, parameterName); 
        }
 
        override public int IndexOf(object value) {
            if (null != value) {
                ValidateType(value);
 
                List items = InnerList;
 
                if (null != items) { 
                    int count = items.Count;
 
                    for (int i = 0; i < count; i++) {
                        if (value == items[i]) {
                            return i;
                        } 
                    }
                } 
            } 
            return -1;
        } 

        override public void Insert(int index, object value) {
            OnChange();
            ValidateType(value); 
            Validate(-1, (EntityParameter)value);
            InnerList.Insert(index, (EntityParameter)value); 
        } 

        private void RangeCheck(int index) { 
            if ((index < 0) || (Count <= index)) {
                throw ADP.ParametersMappingIndex(index, this);
            }
        } 

        override public void Remove(object value) { 
            OnChange(); 
            ValidateType(value);
            int index = IndexOf(value); 
            if (-1 != index) {
                RemoveIndex(index);
            }
            else if (this != ((EntityParameter)value).CompareExchangeParent(null, this)) { 
                throw ADP.CollectionRemoveInvalidObject(ItemType, this);
            } 
        } 

        override public void RemoveAt(int index) { 
            OnChange();
            RangeCheck(index);
            RemoveIndex(index);
        } 

        override public void RemoveAt(string parameterName) { 
            OnChange(); 
            int index = CheckName(parameterName);
            RemoveIndex(index); 
        }

        private void RemoveIndex(int index) {
            List items = InnerList; 
            Debug.Assert((null != items) && (0 <= index) && (index < Count), "RemoveIndex, invalid");
            EntityParameter item = items[index]; 
            items.RemoveAt(index); 
            item.ResetParent();
        } 

        private void Replace(int index, object newValue) {
            List items = InnerList;
            Debug.Assert((null != items) && (0 <= index) && (index < Count), "Replace Index invalid"); 
            ValidateType(newValue);
            Validate(index, newValue); 
            EntityParameter item = items[index]; 
            items[index] = (EntityParameter)newValue;
            item.ResetParent(); 
        }

        override protected void SetParameter(int index, DbParameter value) {
            OnChange(); 
            RangeCheck(index);
            Replace(index, value); 
        } 

        override protected void SetParameter(string parameterName, DbParameter value) { 
            OnChange();
            int index = IndexOf(parameterName);
            if (index < 0) {
                throw ADP.ParametersSourceIndex(parameterName, this, ItemType); 
            }
            Replace(index, value); 
        } 

        private void Validate(int index, object value) { 
            if (null == value) {
                throw ADP.ParameterNull("value", this, ItemType);
            }
 
            object parent = ((EntityParameter)value).CompareExchangeParent(this, null);
            if (null != parent) { 
                if (this != parent) { 
                    throw ADP.ParametersIsNotParent(ItemType, this);
                } 
                if (index != IndexOf(value)) {
                    throw ADP.ParametersIsParent(ItemType, this);
                }
            } 

            String name = ((EntityParameter)value).ParameterName; 
            if (0 == name.Length) { 
                index = 1;
                do { 
                    name = ADP.Parameter + index.ToString(CultureInfo.CurrentCulture);
                    index++;
                } while (-1 != IndexOf(name));
                ((EntityParameter)value).ParameterName = name; 
            }
        } 
 
        private void ValidateType(object value) {
            if (null == value) { 
                throw ADP.ParameterNull("value", this, ItemType);
            }
            else if (!ItemType.IsInstanceOfType(value)) {
                throw ADP.InvalidParameterType(this, ItemType, value); 
            }
        } 
 
    };
} 


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DbParameterCollectionHelper.cs source code in C# .NET

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