DbParameterCollectionHelper.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / System / Data / ProviderBase / DbParameterCollectionHelper.cs / 1 / DbParameterCollectionHelper.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
namespace NAMESPACE 
{
    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;
 
#if WINFSInternalOnly
    internal
#else
    public 
#endif
    sealed partial class PARAMETERCOLLECTIONOBJECTNAME : DbParameterCollection { 
        private List _items; // the collection of parameters 

        override public int Count { 
            get {
                // NOTE: we don't construct the list just to get the count.
                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();  // fire event before value is validated
            ValidateType(value);
            Validate(-1, value); 
            InnerList.Add((PARAMETEROBJECTNAME)value);
            return Count-1; 
        } 

        override public void AddRange(System.Array values) { 
            OnChange();  // fire event before value is validated
            if (null == values) {
                throw ADP.ArgumentNull("values");
            } 
            foreach(object value in values) {
                ValidateType(value); 
            } 
            foreach(PARAMETEROBJECTNAME value in values) {
                Validate(-1, value); 
                InnerList.Add((PARAMETEROBJECTNAME)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();  // fire event before value is validated
            List items = InnerList; 
 
            if (null != items) {
                foreach(PARAMETEROBJECTNAME 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; 
                // first case, kana, width sensitive search
                foreach(PARAMETEROBJECTNAME parameter in items) { 
                    if (0 == ADP.SrcCompare(parameterName, parameter.ParameterName)) {
                        return i;
                    }
                    ++i; 
                }
                i = 0; 
                // then insensitive search 
                foreach(PARAMETEROBJECTNAME 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();  // fire event before value is validated 
            ValidateType(value); 
            Validate(-1, (PARAMETEROBJECTNAME)value);
            InnerList.Insert(index, (PARAMETEROBJECTNAME)value); 
        }

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

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

        override public void RemoveAt(int index) {
            OnChange();  // fire event before value is validated 
            RangeCheck(index);
            RemoveIndex(index); 
        } 

        override public void RemoveAt(string parameterName) { 
            OnChange();  // fire event before value is validated
            int index = CheckName(parameterName);
            RemoveIndex(index);
        } 

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

        override protected void SetParameter(int index, DbParameter value) { 
            OnChange();  // fire event before value is validated 
            RangeCheck(index);
            Replace(index, value); 
        }

        override protected void SetParameter(string parameterName, DbParameter value) {
            OnChange();  // fire event before value is validated 
            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);
            } 
            // Validate assigns the parent - remove clears the parent 
            object parent = ((PARAMETEROBJECTNAME)value).CompareExchangeParent(this, null);
            if (null != parent) { 
                if (this != parent) {
                    throw ADP.ParametersIsNotParent(ItemType, this);
                }
                if (index != IndexOf(value)) { 
                    throw ADP.ParametersIsParent(ItemType, this);
                } 
            } 
            // generate a ParameterName
            String name = ((PARAMETEROBJECTNAME)value).ParameterName; 
            if (0 == name.Length) {
                index = 1;
                do {
                    name = ADP.Parameter + index.ToString(CultureInfo.CurrentCulture); 
                    index++;
                } while (-1 != IndexOf(name)); 
                ((PARAMETEROBJECTNAME)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); 
            }
        } 

    };
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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