DataViewManager.cs source code in C# .NET

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Code:

/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / DataViewManager.cs / 1305376 / DataViewManager.cs

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

namespace System.Data { 
    using System;
    using System.ComponentModel;
    using System.Collections;
    using System.IO; 
    using System.Text;
    using System.Xml; 
 
    [
    Designer("Microsoft.VSDesigner.Data.VS.DataViewManagerDesigner, " + AssemblyRef.MicrosoftVSDesigner) 
    ]
    public class DataViewManager : MarshalByValueComponent, IBindingList, System.ComponentModel.ITypedList {
        private DataViewSettingCollection dataViewSettingsCollection;
        private DataSet dataSet; 
        private DataViewManagerListItemTypeDescriptor item;
        private bool locked; 
        internal int nViews = 0; 

        private System.ComponentModel.ListChangedEventHandler onListChanged; 

        private static NotSupportedException NotSupported = new NotSupportedException();

        public DataViewManager() : this(null, false) {} 

        public DataViewManager(DataSet dataSet) : this(dataSet, false) {} 
 
        internal DataViewManager(DataSet dataSet, bool locked) {
            GC.SuppressFinalize(this); 
            this.dataSet = dataSet;
            if (this.dataSet != null) {
                this.dataSet.Tables.CollectionChanged += new CollectionChangeEventHandler(TableCollectionChanged);
                this.dataSet.Relations.CollectionChanged += new CollectionChangeEventHandler(RelationCollectionChanged); 
            }
            this.locked = locked; 
            this.item = new DataViewManagerListItemTypeDescriptor(this); 
            this.dataViewSettingsCollection = new DataViewSettingCollection(this);
        } 

        [
        DefaultValue(null),
        ResDescriptionAttribute(Res.DataViewManagerDataSetDescr) 
        ]
        public DataSet DataSet { 
            get { 
                return dataSet;
            } 
            set {
                if (value == null)
                    throw ExceptionBuilder.SetFailed("DataSet to null");
 
                if (locked)
                    throw ExceptionBuilder.SetDataSetFailed(); 
 
                if (dataSet != null) {
                    if (nViews > 0) 
                        throw ExceptionBuilder.CanNotSetDataSet();

                    this.dataSet.Tables.CollectionChanged -= new CollectionChangeEventHandler(TableCollectionChanged);
                    this.dataSet.Relations.CollectionChanged -= new CollectionChangeEventHandler(RelationCollectionChanged); 
                }
 
                this.dataSet = value; 
                this.dataSet.Tables.CollectionChanged += new CollectionChangeEventHandler(TableCollectionChanged);
                this.dataSet.Relations.CollectionChanged += new CollectionChangeEventHandler(RelationCollectionChanged); 
                this.dataViewSettingsCollection = new DataViewSettingCollection(this);
                item.Reset();
            }
        } 

        [ 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content), 
        ResDescriptionAttribute(Res.DataViewManagerTableSettingsDescr)
        ] 
        public DataViewSettingCollection DataViewSettings {
            get {
                return dataViewSettingsCollection;
            } 
        }
 
        public string DataViewSettingCollectionString { 
            get {
                if (dataSet == null) 
                    return "";

                StringBuilder builder = new StringBuilder();
                builder.Append(""); 
                foreach (DataTable dt in dataSet.Tables) {
                    DataViewSetting ds = dataViewSettingsCollection[dt]; 
                    builder.AppendFormat(System.Globalization.CultureInfo.InvariantCulture, "<{0} Sort=\"{1}\" RowFilter=\"{2}\" RowStateFilter=\"{3}\"/>", dt.EncodedTableName, ds.Sort, ds.RowFilter, ds.RowStateFilter); 
                }
                builder.Append(""); 
                return builder.ToString();
            }
            set {
                if (value == null || value.Length == 0) 
                    return;
 
                XmlTextReader r = new XmlTextReader(new StringReader(value)); 
                r.WhitespaceHandling = WhitespaceHandling.None;
                r.Read(); 
                if (r.Name != "DataViewSettingCollectionString")
                    throw ExceptionBuilder.SetFailed("DataViewSettingCollectionString");
                while (r.Read()) {
                    if (r.NodeType != XmlNodeType.Element) 
                        continue;
 
                    string table = XmlConvert.DecodeName(r.LocalName); 
                    if (r.MoveToAttribute("Sort"))
                        dataViewSettingsCollection[table].Sort = r.Value; 

                    if (r.MoveToAttribute("RowFilter"))
                        dataViewSettingsCollection[table].RowFilter = r.Value;
 
                    if (r.MoveToAttribute("RowStateFilter"))
                        dataViewSettingsCollection[table].RowStateFilter = (DataViewRowState)Enum.Parse(typeof(DataViewRowState),r.Value); 
                } 
            }
        } 

        IEnumerator IEnumerable.GetEnumerator() {
            DataViewManagerListItemTypeDescriptor[] items = new DataViewManagerListItemTypeDescriptor[1];
            ((ICollection)this).CopyTo(items, 0); 
            return items.GetEnumerator();
        } 
 
        int ICollection.Count {
            get { 
                return 1;
            }
        }
 
        object ICollection.SyncRoot {
            get { 
                return this; 
            }
        } 

        bool ICollection.IsSynchronized {
            get {
                return false; 
            }
        } 
 
        bool IList.IsReadOnly {
            get { 
                return true;
            }
        }
 
        bool IList.IsFixedSize {
            get { 
                return true; 
            }
        } 

        void ICollection.CopyTo(Array array, int index) {
            array.SetValue((object)(new DataViewManagerListItemTypeDescriptor(this)), index);
        } 

        object IList.this[int index] { 
            get { 
                return item;
            } 
            set {
                throw ExceptionBuilder.CannotModifyCollection();
            }
        } 

        int IList.Add(object value) { 
            throw ExceptionBuilder.CannotModifyCollection(); 
        }
 
        void IList.Clear() {
            throw ExceptionBuilder.CannotModifyCollection();
        }
 
        bool IList.Contains(object value) {
            return(value == item); 
        } 

        int IList.IndexOf(object value) { 
            return(value == item) ? 1 : -1;
        }

        void IList.Insert(int index, object value) { 
            throw ExceptionBuilder.CannotModifyCollection();
        } 
 
        void IList.Remove(object value) {
            throw ExceptionBuilder.CannotModifyCollection(); 
        }

        void IList.RemoveAt(int index) {
            throw ExceptionBuilder.CannotModifyCollection(); 
        }
 
        // ------------- IBindingList: --------------------------- 

        bool IBindingList.AllowNew { 
            get {
                return false;
            }
        } 
        object IBindingList.AddNew() {
            throw NotSupported; 
        } 

        bool IBindingList.AllowEdit { 
            get {
                return false;
            }
        } 

        bool IBindingList.AllowRemove { 
            get { 
                return false;
            } 
        }

        bool IBindingList.SupportsChangeNotification {
            get { 
                return true;
            } 
        } 

        bool IBindingList.SupportsSearching { 
            get {
                return false;
            }
        } 

        bool IBindingList.SupportsSorting { 
            get { 
                return false;
            } 
        }

        bool IBindingList.IsSorted {
            get { 
                throw NotSupported;
            } 
        } 

        PropertyDescriptor IBindingList.SortProperty { 
            get {
                throw NotSupported;
            }
        } 

        ListSortDirection IBindingList.SortDirection { 
            get { 
                throw NotSupported;
            } 
        }

        public event System.ComponentModel.ListChangedEventHandler ListChanged {
            add { 
                onListChanged += value;
            } 
            remove { 
                onListChanged -= value;
            } 
        }

        void IBindingList.AddIndex(PropertyDescriptor property) {
            // no operation 
        }
 
        void IBindingList.ApplySort(PropertyDescriptor property, ListSortDirection direction) { 
            throw NotSupported;
        } 

        int IBindingList.Find(PropertyDescriptor property, object key) {
                    throw NotSupported;
        } 

        void IBindingList.RemoveIndex(PropertyDescriptor property) { 
            // no operation 
        }
 
        void IBindingList.RemoveSort() {
            throw NotSupported;
        }
 
        /*
        string IBindingList.GetListName() { 
            return ((System.Data.ITypedList)this).GetListName(null); 
        }
        string IBindingList.GetListName(PropertyDescriptor[] listAccessors) { 
            return ((System.Data.ITypedList)this).GetListName(listAccessors);
        }
        */
 
        // [....]: GetListName and GetItemProperties almost the same in DataView and DataViewManager
        string System.ComponentModel.ITypedList.GetListName(PropertyDescriptor[] listAccessors) { 
            DataSet dataSet = DataSet; 
            if (dataSet == null)
                throw ExceptionBuilder.CanNotUseDataViewManager(); 

            if (listAccessors == null || listAccessors.Length == 0) {
                return dataSet.DataSetName;
            } 
            else {
                DataTable table = dataSet.FindTable(null, listAccessors, 0); 
                if (table != null) { 
                    return table.TableName;
                } 
            }
            return String.Empty;
        }
 
        PropertyDescriptorCollection System.ComponentModel.ITypedList.GetItemProperties(PropertyDescriptor[] listAccessors) {
            DataSet dataSet = DataSet; 
            if (dataSet == null) 
                throw ExceptionBuilder.CanNotUseDataViewManager();
 
            if (listAccessors == null || listAccessors.Length == 0) {
                return((ICustomTypeDescriptor)(new DataViewManagerListItemTypeDescriptor(this))).GetProperties();
            }
            else { 
                DataTable table = dataSet.FindTable(null, listAccessors, 0);
                if (table != null) { 
                    return table.GetPropertyDescriptorCollection(null); 
                }
            } 
            return new PropertyDescriptorCollection(null);
        }

        public DataView CreateDataView(DataTable table) { 
            if (dataSet == null)
                throw ExceptionBuilder.CanNotUseDataViewManager(); 
 
            DataView dataView = new DataView(table);
            dataView.SetDataViewManager(this); 
            return dataView;
        }

        protected virtual void OnListChanged(ListChangedEventArgs e) { 
            try {
                if (onListChanged != null) { 
                    onListChanged(this, e); 
                }
            } 
            catch (Exception f) {
                //
                if (!Common.ADP.IsCatchableExceptionType(f)) {
                    throw; 
                }
                ExceptionBuilder.TraceExceptionWithoutRethrow(f); 
                // ignore the exception 
            }
        } 

        protected virtual void TableCollectionChanged(object sender, CollectionChangeEventArgs e) {
             PropertyDescriptor NullProp = null;
             OnListChanged( 
                 e.Action == CollectionChangeAction.Add ? new ListChangedEventArgs(ListChangedType.PropertyDescriptorAdded, new DataTablePropertyDescriptor((System.Data.DataTable)e.Element)) :
                 e.Action == CollectionChangeAction.Refresh ? new ListChangedEventArgs(ListChangedType.PropertyDescriptorChanged, NullProp) : 
                 e.Action == CollectionChangeAction.Remove ? new ListChangedEventArgs(ListChangedType.PropertyDescriptorDeleted, new DataTablePropertyDescriptor((System.Data.DataTable)e.Element)) : 
                 /*default*/ null
             ); 
        }

        protected virtual void RelationCollectionChanged(object sender, CollectionChangeEventArgs e) {
            DataRelationPropertyDescriptor NullProp = null; 
            OnListChanged(
                e.Action == CollectionChangeAction.Add ? new ListChangedEventArgs(ListChangedType.PropertyDescriptorAdded, new DataRelationPropertyDescriptor((System.Data.DataRelation)e.Element)) : 
                e.Action == CollectionChangeAction.Refresh ? new ListChangedEventArgs(ListChangedType.PropertyDescriptorChanged, NullProp): 
                e.Action == CollectionChangeAction.Remove ? new ListChangedEventArgs(ListChangedType.PropertyDescriptorDeleted, new DataRelationPropertyDescriptor((System.Data.DataRelation)e.Element)) :
            /*default*/ null 
            );
        }
    }
} 

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

namespace System.Data { 
    using System;
    using System.ComponentModel;
    using System.Collections;
    using System.IO; 
    using System.Text;
    using System.Xml; 
 
    [
    Designer("Microsoft.VSDesigner.Data.VS.DataViewManagerDesigner, " + AssemblyRef.MicrosoftVSDesigner) 
    ]
    public class DataViewManager : MarshalByValueComponent, IBindingList, System.ComponentModel.ITypedList {
        private DataViewSettingCollection dataViewSettingsCollection;
        private DataSet dataSet; 
        private DataViewManagerListItemTypeDescriptor item;
        private bool locked; 
        internal int nViews = 0; 

        private System.ComponentModel.ListChangedEventHandler onListChanged; 

        private static NotSupportedException NotSupported = new NotSupportedException();

        public DataViewManager() : this(null, false) {} 

        public DataViewManager(DataSet dataSet) : this(dataSet, false) {} 
 
        internal DataViewManager(DataSet dataSet, bool locked) {
            GC.SuppressFinalize(this); 
            this.dataSet = dataSet;
            if (this.dataSet != null) {
                this.dataSet.Tables.CollectionChanged += new CollectionChangeEventHandler(TableCollectionChanged);
                this.dataSet.Relations.CollectionChanged += new CollectionChangeEventHandler(RelationCollectionChanged); 
            }
            this.locked = locked; 
            this.item = new DataViewManagerListItemTypeDescriptor(this); 
            this.dataViewSettingsCollection = new DataViewSettingCollection(this);
        } 

        [
        DefaultValue(null),
        ResDescriptionAttribute(Res.DataViewManagerDataSetDescr) 
        ]
        public DataSet DataSet { 
            get { 
                return dataSet;
            } 
            set {
                if (value == null)
                    throw ExceptionBuilder.SetFailed("DataSet to null");
 
                if (locked)
                    throw ExceptionBuilder.SetDataSetFailed(); 
 
                if (dataSet != null) {
                    if (nViews > 0) 
                        throw ExceptionBuilder.CanNotSetDataSet();

                    this.dataSet.Tables.CollectionChanged -= new CollectionChangeEventHandler(TableCollectionChanged);
                    this.dataSet.Relations.CollectionChanged -= new CollectionChangeEventHandler(RelationCollectionChanged); 
                }
 
                this.dataSet = value; 
                this.dataSet.Tables.CollectionChanged += new CollectionChangeEventHandler(TableCollectionChanged);
                this.dataSet.Relations.CollectionChanged += new CollectionChangeEventHandler(RelationCollectionChanged); 
                this.dataViewSettingsCollection = new DataViewSettingCollection(this);
                item.Reset();
            }
        } 

        [ 
        DesignerSerializationVisibility(DesignerSerializationVisibility.Content), 
        ResDescriptionAttribute(Res.DataViewManagerTableSettingsDescr)
        ] 
        public DataViewSettingCollection DataViewSettings {
            get {
                return dataViewSettingsCollection;
            } 
        }
 
        public string DataViewSettingCollectionString { 
            get {
                if (dataSet == null) 
                    return "";

                StringBuilder builder = new StringBuilder();
                builder.Append(""); 
                foreach (DataTable dt in dataSet.Tables) {
                    DataViewSetting ds = dataViewSettingsCollection[dt]; 
                    builder.AppendFormat(System.Globalization.CultureInfo.InvariantCulture, "<{0} Sort=\"{1}\" RowFilter=\"{2}\" RowStateFilter=\"{3}\"/>", dt.EncodedTableName, ds.Sort, ds.RowFilter, ds.RowStateFilter); 
                }
                builder.Append(""); 
                return builder.ToString();
            }
            set {
                if (value == null || value.Length == 0) 
                    return;
 
                XmlTextReader r = new XmlTextReader(new StringReader(value)); 
                r.WhitespaceHandling = WhitespaceHandling.None;
                r.Read(); 
                if (r.Name != "DataViewSettingCollectionString")
                    throw ExceptionBuilder.SetFailed("DataViewSettingCollectionString");
                while (r.Read()) {
                    if (r.NodeType != XmlNodeType.Element) 
                        continue;
 
                    string table = XmlConvert.DecodeName(r.LocalName); 
                    if (r.MoveToAttribute("Sort"))
                        dataViewSettingsCollection[table].Sort = r.Value; 

                    if (r.MoveToAttribute("RowFilter"))
                        dataViewSettingsCollection[table].RowFilter = r.Value;
 
                    if (r.MoveToAttribute("RowStateFilter"))
                        dataViewSettingsCollection[table].RowStateFilter = (DataViewRowState)Enum.Parse(typeof(DataViewRowState),r.Value); 
                } 
            }
        } 

        IEnumerator IEnumerable.GetEnumerator() {
            DataViewManagerListItemTypeDescriptor[] items = new DataViewManagerListItemTypeDescriptor[1];
            ((ICollection)this).CopyTo(items, 0); 
            return items.GetEnumerator();
        } 
 
        int ICollection.Count {
            get { 
                return 1;
            }
        }
 
        object ICollection.SyncRoot {
            get { 
                return this; 
            }
        } 

        bool ICollection.IsSynchronized {
            get {
                return false; 
            }
        } 
 
        bool IList.IsReadOnly {
            get { 
                return true;
            }
        }
 
        bool IList.IsFixedSize {
            get { 
                return true; 
            }
        } 

        void ICollection.CopyTo(Array array, int index) {
            array.SetValue((object)(new DataViewManagerListItemTypeDescriptor(this)), index);
        } 

        object IList.this[int index] { 
            get { 
                return item;
            } 
            set {
                throw ExceptionBuilder.CannotModifyCollection();
            }
        } 

        int IList.Add(object value) { 
            throw ExceptionBuilder.CannotModifyCollection(); 
        }
 
        void IList.Clear() {
            throw ExceptionBuilder.CannotModifyCollection();
        }
 
        bool IList.Contains(object value) {
            return(value == item); 
        } 

        int IList.IndexOf(object value) { 
            return(value == item) ? 1 : -1;
        }

        void IList.Insert(int index, object value) { 
            throw ExceptionBuilder.CannotModifyCollection();
        } 
 
        void IList.Remove(object value) {
            throw ExceptionBuilder.CannotModifyCollection(); 
        }

        void IList.RemoveAt(int index) {
            throw ExceptionBuilder.CannotModifyCollection(); 
        }
 
        // ------------- IBindingList: --------------------------- 

        bool IBindingList.AllowNew { 
            get {
                return false;
            }
        } 
        object IBindingList.AddNew() {
            throw NotSupported; 
        } 

        bool IBindingList.AllowEdit { 
            get {
                return false;
            }
        } 

        bool IBindingList.AllowRemove { 
            get { 
                return false;
            } 
        }

        bool IBindingList.SupportsChangeNotification {
            get { 
                return true;
            } 
        } 

        bool IBindingList.SupportsSearching { 
            get {
                return false;
            }
        } 

        bool IBindingList.SupportsSorting { 
            get { 
                return false;
            } 
        }

        bool IBindingList.IsSorted {
            get { 
                throw NotSupported;
            } 
        } 

        PropertyDescriptor IBindingList.SortProperty { 
            get {
                throw NotSupported;
            }
        } 

        ListSortDirection IBindingList.SortDirection { 
            get { 
                throw NotSupported;
            } 
        }

        public event System.ComponentModel.ListChangedEventHandler ListChanged {
            add { 
                onListChanged += value;
            } 
            remove { 
                onListChanged -= value;
            } 
        }

        void IBindingList.AddIndex(PropertyDescriptor property) {
            // no operation 
        }
 
        void IBindingList.ApplySort(PropertyDescriptor property, ListSortDirection direction) { 
            throw NotSupported;
        } 

        int IBindingList.Find(PropertyDescriptor property, object key) {
                    throw NotSupported;
        } 

        void IBindingList.RemoveIndex(PropertyDescriptor property) { 
            // no operation 
        }
 
        void IBindingList.RemoveSort() {
            throw NotSupported;
        }
 
        /*
        string IBindingList.GetListName() { 
            return ((System.Data.ITypedList)this).GetListName(null); 
        }
        string IBindingList.GetListName(PropertyDescriptor[] listAccessors) { 
            return ((System.Data.ITypedList)this).GetListName(listAccessors);
        }
        */
 
        // [....]: GetListName and GetItemProperties almost the same in DataView and DataViewManager
        string System.ComponentModel.ITypedList.GetListName(PropertyDescriptor[] listAccessors) { 
            DataSet dataSet = DataSet; 
            if (dataSet == null)
                throw ExceptionBuilder.CanNotUseDataViewManager(); 

            if (listAccessors == null || listAccessors.Length == 0) {
                return dataSet.DataSetName;
            } 
            else {
                DataTable table = dataSet.FindTable(null, listAccessors, 0); 
                if (table != null) { 
                    return table.TableName;
                } 
            }
            return String.Empty;
        }
 
        PropertyDescriptorCollection System.ComponentModel.ITypedList.GetItemProperties(PropertyDescriptor[] listAccessors) {
            DataSet dataSet = DataSet; 
            if (dataSet == null) 
                throw ExceptionBuilder.CanNotUseDataViewManager();
 
            if (listAccessors == null || listAccessors.Length == 0) {
                return((ICustomTypeDescriptor)(new DataViewManagerListItemTypeDescriptor(this))).GetProperties();
            }
            else { 
                DataTable table = dataSet.FindTable(null, listAccessors, 0);
                if (table != null) { 
                    return table.GetPropertyDescriptorCollection(null); 
                }
            } 
            return new PropertyDescriptorCollection(null);
        }

        public DataView CreateDataView(DataTable table) { 
            if (dataSet == null)
                throw ExceptionBuilder.CanNotUseDataViewManager(); 
 
            DataView dataView = new DataView(table);
            dataView.SetDataViewManager(this); 
            return dataView;
        }

        protected virtual void OnListChanged(ListChangedEventArgs e) { 
            try {
                if (onListChanged != null) { 
                    onListChanged(this, e); 
                }
            } 
            catch (Exception f) {
                //
                if (!Common.ADP.IsCatchableExceptionType(f)) {
                    throw; 
                }
                ExceptionBuilder.TraceExceptionWithoutRethrow(f); 
                // ignore the exception 
            }
        } 

        protected virtual void TableCollectionChanged(object sender, CollectionChangeEventArgs e) {
             PropertyDescriptor NullProp = null;
             OnListChanged( 
                 e.Action == CollectionChangeAction.Add ? new ListChangedEventArgs(ListChangedType.PropertyDescriptorAdded, new DataTablePropertyDescriptor((System.Data.DataTable)e.Element)) :
                 e.Action == CollectionChangeAction.Refresh ? new ListChangedEventArgs(ListChangedType.PropertyDescriptorChanged, NullProp) : 
                 e.Action == CollectionChangeAction.Remove ? new ListChangedEventArgs(ListChangedType.PropertyDescriptorDeleted, new DataTablePropertyDescriptor((System.Data.DataTable)e.Element)) : 
                 /*default*/ null
             ); 
        }

        protected virtual void RelationCollectionChanged(object sender, CollectionChangeEventArgs e) {
            DataRelationPropertyDescriptor NullProp = null; 
            OnListChanged(
                e.Action == CollectionChangeAction.Add ? new ListChangedEventArgs(ListChangedType.PropertyDescriptorAdded, new DataRelationPropertyDescriptor((System.Data.DataRelation)e.Element)) : 
                e.Action == CollectionChangeAction.Refresh ? new ListChangedEventArgs(ListChangedType.PropertyDescriptorChanged, NullProp): 
                e.Action == CollectionChangeAction.Remove ? new ListChangedEventArgs(ListChangedType.PropertyDescriptorDeleted, new DataRelationPropertyDescriptor((System.Data.DataRelation)e.Element)) :
            /*default*/ null 
            );
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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