Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / System / Data / DataRow.cs / 3 / DataRow.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// [....]
// [....]
//-----------------------------------------------------------------------------
namespace System.Data {
using System;
using System.Collections;
using System.ComponentModel;
using System.Diagnostics;
using System.Globalization;
using System.Xml;
///
/// Represents a row of data in a
///
#if WINFSInternalOnly
internal
#else
public
#endif
class DataRow {
private readonly DataTable _table;
private readonly DataColumnCollection _columns;
internal int oldRecord = -1;
internal int newRecord = -1;
internal int tempRecord;
internal int _rowID = -1;
internal DataRowAction _action;
internal bool inChangingEvent;
internal bool inDeletingEvent;
internal bool inCascade;
private DataColumn _lastChangedColumn; // last successfully changed column
private int _countColumnChange; // number of columns changed during edit mode
private DataError error;
private object _element;
private int _rbTreeNodeId; // if row is not detached, Id used for computing index in rows collection
private static int _objectTypeCount; // Bid counter
internal readonly int ObjectID = System.Threading.Interlocked.Increment(ref _objectTypeCount);
///
///
/// Initializes a new instance of the DataRow.
///
///
/// Constructs a row from the builder. Only for internal usage..
///
///
protected internal DataRow (DataRowBuilder builder) {
tempRecord = builder._record;
_table = builder._table;
_columns = _table.Columns;
}
internal XmlBoundElement Element {
get {
return (XmlBoundElement) _element;
}
set {
_element = value;
}
}
internal DataColumn LastChangedColumn {
get { // last successfully changed column or if multiple columns changed: null
if (_countColumnChange != 1) {
return null;
}
return _lastChangedColumn;
}
set {
_countColumnChange++;
_lastChangedColumn = value;
}
}
internal bool HasPropertyChanged {
get { return (0 < _countColumnChange); }
}
internal int RBTreeNodeId {
get {
return _rbTreeNodeId;
}
set {
Bid.Trace(" %d#, value=%d\n", ObjectID, value);
_rbTreeNodeId = value;
}
}
///
/// Gets or sets the custom error description for a row.
///
public string RowError {
get {
return(error == null ? String.Empty :error.Text);
}
set {
Bid.Trace(" %d#, value='%ls'\n", ObjectID, value);
if (error == null) {
if (!Common.ADP.IsEmpty(value)) {
error = new DataError(value);
}
RowErrorChanged();
}
else if(error.Text != value) {
error.Text = value;
RowErrorChanged();
}
}
}
private void RowErrorChanged() {
// We don't know wich record was used by view index. try to use both.
if (oldRecord != -1)
_table.RecordChanged(oldRecord);
if (newRecord != -1)
_table.RecordChanged(newRecord);
}
internal int rowID {
get {
return _rowID;
}
set {
ResetLastChangedColumn();
_rowID = value;
}
}
///
/// Gets the current state of the row in regards to its relationship to the table.
///
public DataRowState RowState {
get {
/*
if (oldRecord == -1 && newRecord == -1)
state = DataRowState.Detached; // 2
else if (oldRecord == newRecord)
state = DataRowState.Unchanged; // 2
else if (oldRecord == -1)
state = DataRowState.Added; // 4
else if (newRecord == -1)
state = DataRowState.Deleted; // 4
else
state = DataRowState.Modified; // 4
*/
if (oldRecord == newRecord) {
if (oldRecord == -1) {
return DataRowState.Detached; // 2
}
if (0 < _columns.ColumnsImplementingIChangeTrackingCount) {
foreach(DataColumn dc in _columns.ColumnsImplementingIChangeTracking) {
object value = this[dc];
if ((DBNull.Value != value) && ((IChangeTracking)value).IsChanged) {
return DataRowState.Modified; // 3 + _columns.columnsImplementingIChangeTracking.Count
}
}
}
return DataRowState.Unchanged; // 3
}
else if (oldRecord == -1) {
return DataRowState.Added; // 2
}
else if (newRecord == -1) {
return DataRowState.Deleted; // 3
}
return DataRowState.Modified; // 3
}
}
///
/// Gets the
///
public DataTable Table {
get {
return _table;
}
}
///
/// Gets or sets the data stored in the column specified by index.
///
public object this[int columnIndex] {
get {
DataColumn column = _columns[columnIndex];
int record = GetDefaultRecord();
_table.recordManager.VerifyRecord(record, this);
VerifyValueFromStorage(column, DataRowVersion.Default, column[record]);
return column[record];
}
set {
DataColumn column = _columns[columnIndex];
this[column] = value;
}
}
internal void CheckForLoops(DataRelation rel){
// don't check for loops in the diffgram
// because there may be some holes in the rowCollection
// and index creation may fail. The check will be done
// after all the loading is done _and_ we are sure there
// are no holes in the collection.
if (_table.fInLoadDiffgram || (_table.DataSet != null && _table.DataSet.fInLoadDiffgram))
return;
int count = _table.Rows.Count, i = 0;
// need to optimize this for count > 100
DataRow parent = this.GetParentRow(rel);
while (parent != null) {
if ((parent == this) || (i>count))
throw ExceptionBuilder.NestedCircular(_table.TableName);
i++;
parent = parent.GetParentRow(rel);
}
}
internal int GetNestedParentCount() {
int count = 0;
DataRelation[] nestedParentRelations = _table.NestedParentRelations;
foreach(DataRelation rel in nestedParentRelations) {
if (rel == null) // don't like this but done for backward code compatability
continue;
if (rel.ParentTable == _table) // self-nested table
this.CheckForLoops(rel);
DataRow row = this.GetParentRow(rel);
if (row != null) {
count++;
}
}
return count ;
// Rule 1: At all times, only ONE FK "(in a row) can be non-Null
// we wont allow a row to have multiple parents, as we cant handle it , also in diffgram
}
///
/// Gets or sets the data stored in the column specified by
/// name.
///
public object this[string columnName] {
get {
DataColumn column = GetDataColumn(columnName);
int record = GetDefaultRecord();
_table.recordManager.VerifyRecord(record, this);
VerifyValueFromStorage(column, DataRowVersion.Default, column[record]);
return column[record];
}
set {
DataColumn column = GetDataColumn(columnName);
this[column] = value;
}
}
///
/// Gets or sets
/// the data stored in the specified
///
public object this[DataColumn column] {
get {
CheckColumn(column);
int record = GetDefaultRecord();
_table.recordManager.VerifyRecord(record, this);
VerifyValueFromStorage(column, DataRowVersion.Default, column[record]);
return column[record];
}
set {
CheckColumn(column);
if (inChangingEvent) {
throw ExceptionBuilder.EditInRowChanging();
}
if ((-1 != rowID) && column.ReadOnly) {
throw ExceptionBuilder.ReadOnly(column.ColumnName);
}
// allow users to tailor the proposed value, or throw an exception.
// note we intentionally do not try/catch this event.
// note: we also allow user to do anything at this point
// infinite loops are possible if user calls Item or ItemArray during the event
DataColumnChangeEventArgs e = null;
if (_table.NeedColumnChangeEvents) {
e = new DataColumnChangeEventArgs(this, column, value);
_table.OnColumnChanging(e);
}
if (column.Table != _table) {
// user removed column from table during OnColumnChanging event
throw ExceptionBuilder.ColumnNotInTheTable(column.ColumnName, _table.TableName);
}
if ((-1 != rowID) && column.ReadOnly) {
// user adds row to table during OnColumnChanging event
throw ExceptionBuilder.ReadOnly(column.ColumnName);
}
object proposed = ((null != e) ? e.ProposedValue : value);
if (null == proposed) {
if (column.IsValueType) { // WebData 105963
throw ExceptionBuilder.CannotSetToNull(column);
}
proposed = DBNull.Value;
}
bool immediate = BeginEditInternal();
try {
int record = GetProposedRecordNo();
_table.recordManager.VerifyRecord(record, this);
column[record] = proposed;
}
catch (Exception e1){
//
if (Common.ADP.IsCatchableOrSecurityExceptionType(e1)) {
if (immediate) {
Debug.Assert(!inChangingEvent, "how are we in a changing event to cancel?");
Debug.Assert(-1 != tempRecord, "how no propsed record to cancel?");
CancelEdit(); // WebData 107154
}
}
throw;
}
LastChangedColumn = column;
// note: we intentionally do not try/catch this event.
// infinite loops are possible if user calls Item or ItemArray during the event
if (null != e) {
_table.OnColumnChanged(e); // user may call CancelEdit or EndEdit
}
if (immediate) {
Debug.Assert(!inChangingEvent, "how are we in a changing event to end?");
EndEdit();
}
}
}
///
/// Gets the data stored
/// in the column, specified by index and version of the data to retrieve.
///
public object this[int columnIndex, DataRowVersion version] {
get {
DataColumn column = _columns[columnIndex];
int record = GetRecordFromVersion(version);
_table.recordManager.VerifyRecord(record, this);
VerifyValueFromStorage(column, version, column[record]);
return column[record];
}
}
///
/// Gets the specified version of data stored in
/// the named column.
///
public object this[string columnName, DataRowVersion version] {
get {
DataColumn column = GetDataColumn(columnName);
int record = GetRecordFromVersion(version);
_table.recordManager.VerifyRecord(record, this);
VerifyValueFromStorage(column, version, column[record]);
return column[record];
}
}
///
/// Gets the specified version of data stored in the specified
///
public object this[DataColumn column, DataRowVersion version] {
get {
CheckColumn(column);
int record = GetRecordFromVersion(version);
_table.recordManager.VerifyRecord(record, this);
VerifyValueFromStorage(column, version, column[record]);
return column[record];
}
}
///
/// Gets
/// or sets all of the values for this row through an array.
///
public object[] ItemArray {
get {
int record = GetDefaultRecord();
_table.recordManager.VerifyRecord(record, this);
object[] values = new object[_columns.Count];
for (int i = 0; i < values.Length; i++) {
DataColumn column = _columns[i];
VerifyValueFromStorage(column, DataRowVersion.Default, column[record]);
values[i] = column[record];
}
return values;
}
set {
if (null == value) { // WebData 104372
throw ExceptionBuilder.ArgumentNull("ItemArray");
}
if (_columns.Count < value.Length) {
throw ExceptionBuilder.ValueArrayLength();
}
DataColumnChangeEventArgs e = null;
if (_table.NeedColumnChangeEvents) {
e = new DataColumnChangeEventArgs(this);
}
bool immediate = BeginEditInternal();
for (int i = 0; i < value.Length; ++i) {
// Empty means don't change the row.
if (null != value[i]) {
// may throw exception if user removes column from table during event
DataColumn column = _columns[i];
if ((-1 != rowID) && column.ReadOnly) {
throw ExceptionBuilder.ReadOnly(column.ColumnName);
}
// allow users to tailor the proposed value, or throw an exception.
// note: we intentionally do not try/catch this event.
// note: we also allow user to do anything at this point
// infinite loops are possible if user calls Item or ItemArray during the event
if (null != e) {
e.InitializeColumnChangeEvent(column, value[i]);
_table.OnColumnChanging(e);
}
if (column.Table != _table) {
// user removed column from table during OnColumnChanging event
throw ExceptionBuilder.ColumnNotInTheTable(column.ColumnName, _table.TableName);
}
if ((-1 != rowID) && column.ReadOnly) {
// user adds row to table during OnColumnChanging event
throw ExceptionBuilder.ReadOnly(column.ColumnName);
}
if (tempRecord == -1) {
// user affected CancelEdit or EndEdit during OnColumnChanging event of the last value
BeginEditInternal();
}
object proposed = (null != e) ? e.ProposedValue : value[i];
if (null == proposed) {
if (column.IsValueType) { // WebData 105963
throw ExceptionBuilder.CannotSetToNull(column);
}
proposed = DBNull.Value;
}
try {
// must get proposed record after each event because user may have
// called EndEdit(), AcceptChanges(), BeginEdit() during the event
int record = GetProposedRecordNo();
_table.recordManager.VerifyRecord(record, this);
column[record] = proposed;
}
catch (Exception e1) {
//
if (Common.ADP.IsCatchableOrSecurityExceptionType(e1)) {
if (immediate) {
Debug.Assert(!inChangingEvent, "how are we in a changing event to cancel?");
Debug.Assert(-1 != tempRecord, "how no propsed record to cancel?");
CancelEdit(); // WebData 107154
}
}
throw;
}
LastChangedColumn = column;
// note: we intentionally do not try/catch this event.
// infinite loops are possible if user calls Item or ItemArray during the event
if (null != e) {
_table.OnColumnChanged(e); // user may call CancelEdit or EndEdit
}
}
}
// proposed breaking change: if (immediate){ EndEdit(); } because table currently always fires RowChangedEvent
Debug.Assert(!inChangingEvent, "how are we in a changing event to end?");
EndEdit();
}
}
///
/// Commits all the changes made to this row
/// since the last time
///
public void AcceptChanges() {
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#\n", ObjectID);
try {
EndEdit();
if (this.RowState != DataRowState.Detached && this.RowState != DataRowState.Deleted) {
if (_columns.ColumnsImplementingIChangeTrackingCount > 0) {
foreach(DataColumn dc in _columns.ColumnsImplementingIChangeTracking) {
object value = this[dc];
if (DBNull.Value != value) {
IChangeTracking tracking = (IChangeTracking)value;
if (tracking.IsChanged) {
tracking.AcceptChanges();
}
}
}
}
}
_table.CommitRow(this);
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
///
/// Begins an edit operation on a
///
[
EditorBrowsableAttribute(EditorBrowsableState.Advanced),
]
public void BeginEdit() {
BeginEditInternal();
}
private bool BeginEditInternal() {
if (inChangingEvent) {
throw ExceptionBuilder.BeginEditInRowChanging();
}
if (tempRecord != -1) {
if (tempRecord < _table.recordManager.LastFreeRecord) {
return false; // we will not call EndEdit
}
else {
// partial fix for detached row after Table.Clear scenario
// in debug, it will have asserted earlier, but with this
// it will go get a new record for editing
tempRecord = -1;
}
// shifted VerifyRecord to first make the correction, then verify
_table.recordManager.VerifyRecord(tempRecord, this);
}
if (oldRecord != -1 && newRecord == -1) {
throw ExceptionBuilder.DeletedRowInaccessible();
}
//
ResetLastChangedColumn(); // shouldn't have to do this
tempRecord = _table.NewRecord(newRecord);
Debug.Assert(-1 != tempRecord, "missing temp record");
Debug.Assert(0 == _countColumnChange, "unexpected column change count");
Debug.Assert(null == _lastChangedColumn, "unexpected last column change");
return true;
}
///
/// Cancels the current edit on the row.
///
[
EditorBrowsableAttribute(EditorBrowsableState.Advanced),
]
public void CancelEdit() {
if (inChangingEvent) {
throw ExceptionBuilder.CancelEditInRowChanging();
}
_table.FreeRecord(ref tempRecord);
Debug.Assert(-1 == tempRecord, "unexpected temp record");
ResetLastChangedColumn();
}
private void CheckColumn(DataColumn column) {
if (column == null) {
throw ExceptionBuilder.ArgumentNull("column");
}
if (column.Table != _table) {
throw ExceptionBuilder.ColumnNotInTheTable(column.ColumnName, _table.TableName);
}
}
///
/// Throws a RowNotInTableException if row isn't in table.
///
internal void CheckInTable() {
if (rowID == -1) {
throw ExceptionBuilder.RowNotInTheTable();
}
}
///
/// Deletes the row.
///
public void Delete() {
if (inDeletingEvent) {
throw ExceptionBuilder.DeleteInRowDeleting();
}
if (newRecord == -1)
return;
_table.DeleteRow(this);
}
///
/// Ends the edit occurring on the row.
///
[
EditorBrowsableAttribute(EditorBrowsableState.Advanced),
]
public void EndEdit() {
if (inChangingEvent) {
throw ExceptionBuilder.EndEditInRowChanging();
}
if (newRecord == -1) {
return; // this is meaningless, detatched row case
}
if (tempRecord != -1) {
//int record = tempRecord;
//tempRecord = -1;
try {
SetNewRecord(tempRecord);
}
finally {
// a constraint violation may be thrown during SetNewRecord
ResetLastChangedColumn();
}
}
}
///
/// Sets the error description for a column specified by index.
///
public void SetColumnError(int columnIndex, string error) {
DataColumn column = _columns[columnIndex];
if (column == null)
throw ExceptionBuilder.ColumnOutOfRange(columnIndex);
SetColumnError(column, error);
}
///
/// Sets
/// the error description for a column specified by name.
///
public void SetColumnError(string columnName, string error) {
DataColumn column = GetDataColumn(columnName);
SetColumnError(column, error);
}
///
/// Sets the error description for a column specified as a
///
public void SetColumnError(DataColumn column, string error) {
CheckColumn(column);
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#, column=%d, error='%ls'\n", ObjectID, column.ObjectID, error);
try {
if (this.error == null) this.error = new DataError();
if(GetColumnError(column) != error) {
this.error.SetColumnError(column, error);
RowErrorChanged();
}
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
///
/// Gets the error description for the column specified
/// by index.
///
public string GetColumnError(int columnIndex) {
DataColumn column = _columns[columnIndex];
return GetColumnError(column);
}
///
/// Gets the error description for a column, specified by name.
///
public string GetColumnError(string columnName) {
DataColumn column = GetDataColumn(columnName);
return GetColumnError(column);
}
///
/// Gets the error description of
/// the specified
///
public string GetColumnError(DataColumn column) {
CheckColumn(column);
if (error == null) error = new DataError();
return error.GetColumnError(column);
}
///
/// Clears the errors for the row, including the
public void ClearErrors() {
if (error != null) {
error.Clear();
RowErrorChanged();
}
}
internal void ClearError(DataColumn column) {
if (error != null) {
error.Clear(column);
RowErrorChanged();
}
}
///
/// Gets a value indicating whether there are errors in a columns collection.
///
public bool HasErrors {
get {
return(error == null ? false : error.HasErrors);
}
}
///
/// Gets an array of columns that have errors.
///
public DataColumn[] GetColumnsInError() {
if (error == null)
return DataTable.zeroColumns;
else
return error.GetColumnsInError();
}
public DataRow[] GetChildRows(string relationName) {
return GetChildRows(_table.ChildRelations[relationName], DataRowVersion.Default);
}
public DataRow[] GetChildRows(string relationName, DataRowVersion version) {
return GetChildRows(_table.ChildRelations[relationName], version);
}
///
/// Gets the child rows of this
///
public DataRow[] GetChildRows(DataRelation relation) {
return GetChildRows(relation, DataRowVersion.Default);
}
///
/// Gets the child rows of this
///
public DataRow[] GetChildRows(DataRelation relation, DataRowVersion version) {
if (relation == null)
return _table.NewRowArray(0);
//if (-1 == rowID)
// throw ExceptionBuilder.RowNotInTheTable();
if (relation.DataSet != _table.DataSet)
throw ExceptionBuilder.RowNotInTheDataSet();
if (relation.ParentKey.Table != _table)
throw ExceptionBuilder.RelationForeignTable(relation.ParentTable.TableName, _table.TableName);
return DataRelation.GetChildRows(relation.ParentKey, relation.ChildKey, this, version);
}
internal DataColumn GetDataColumn(string columnName) {
DataColumn column = _columns[columnName];
if (null != column) {
return column;
}
throw ExceptionBuilder.ColumnNotInTheTable(columnName, _table.TableName);
}
public DataRow GetParentRow(string relationName) {
return GetParentRow(_table.ParentRelations[relationName], DataRowVersion.Default);
}
public DataRow GetParentRow(string relationName, DataRowVersion version) {
return GetParentRow(_table.ParentRelations[relationName], version);
}
///
/// Gets the parent row of this
///
public DataRow GetParentRow(DataRelation relation) {
return GetParentRow(relation, DataRowVersion.Default);
}
///
/// Gets the parent row of this
///
public DataRow GetParentRow(DataRelation relation, DataRowVersion version) {
if (relation == null)
return null;
//if (-1 == rowID)
// throw ExceptionBuilder.RowNotInTheTable();
if (relation.DataSet != _table.DataSet)
throw ExceptionBuilder.RelationForeignRow();
if (relation.ChildKey.Table != _table)
throw ExceptionBuilder.GetParentRowTableMismatch(relation.ChildTable.TableName, _table.TableName);
return DataRelation.GetParentRow(relation.ParentKey, relation.ChildKey, this, version);
}
// a multiple nested child table's row can have only one non-null FK per row. So table has multiple
// parents, but a row can have only one parent. Same nested row cannot below to 2 parent rows.
internal DataRow GetNestedParentRow(DataRowVersion version) {
// 1) Walk over all FKs and get the non-null. 2) Get the relation. 3) Get the parent Row.
DataRelation[] nestedParentRelations = _table.NestedParentRelations;
foreach(DataRelation rel in nestedParentRelations) {
if (rel == null) // don't like this but done for backward code compatability
continue;
if (rel.ParentTable == _table) // self-nested table
this.CheckForLoops(rel);
DataRow row = this.GetParentRow(rel, version);
if (row != null) {
return row;
}
}
return null;// Rule 1: At all times, only ONE FK "(in a row) can be non-Null
}
// No Nested in 1-many
///
/// [To be supplied.]
///
public DataRow[] GetParentRows(string relationName) {
return GetParentRows(_table.ParentRelations[relationName], DataRowVersion.Default);
}
///
/// [To be supplied.]
///
public DataRow[] GetParentRows(string relationName, DataRowVersion version) {
return GetParentRows(_table.ParentRelations[relationName], version);
}
///
///
/// Gets the parent rows of this
///
public DataRow[] GetParentRows(DataRelation relation) {
return GetParentRows(relation, DataRowVersion.Default);
}
///
///
/// Gets the parent rows of this
///
public DataRow[] GetParentRows(DataRelation relation, DataRowVersion version) {
if (relation == null)
return _table.NewRowArray(0);
//if (-1 == rowID)
// throw ExceptionBuilder.RowNotInTheTable();
if (relation.DataSet != _table.DataSet)
throw ExceptionBuilder.RowNotInTheDataSet();
if (relation.ChildKey.Table != _table)
throw ExceptionBuilder.GetParentRowTableMismatch(relation.ChildTable.TableName, _table.TableName);
return DataRelation.GetParentRows(relation.ParentKey, relation.ChildKey, this, version);
}
internal object[] GetColumnValues(DataColumn[] columns) {
return GetColumnValues(columns, DataRowVersion.Default);
}
internal object[] GetColumnValues(DataColumn[] columns, DataRowVersion version) {
DataKey key = new DataKey(columns, false); // temporary key, don't copy columns
return GetKeyValues(key, version);
}
internal object[] GetKeyValues(DataKey key) {
int record = GetDefaultRecord();
return key.GetKeyValues(record);
}
internal object[] GetKeyValues(DataKey key, DataRowVersion version) {
int record = GetRecordFromVersion(version);
return key.GetKeyValues(record);
}
internal int GetCurrentRecordNo() {
if (newRecord == -1)
throw ExceptionBuilder.NoCurrentData();
return newRecord;
}
internal int GetDefaultRecord() {
if (tempRecord != -1)
return tempRecord;
if (newRecord != -1) {
return newRecord;
}
// If row has oldRecord - this is deleted row.
if (oldRecord == -1)
throw ExceptionBuilder.RowRemovedFromTheTable();
else
throw ExceptionBuilder.DeletedRowInaccessible();
}
internal int GetOriginalRecordNo() {
if (oldRecord == -1)
throw ExceptionBuilder.NoOriginalData();
return oldRecord;
}
private int GetProposedRecordNo() {
if (tempRecord == -1)
throw ExceptionBuilder.NoProposedData();
return tempRecord;
}
internal int GetRecordFromVersion(DataRowVersion version) {
switch (version) {
case DataRowVersion.Original:
return GetOriginalRecordNo();
case DataRowVersion.Current:
return GetCurrentRecordNo();
case DataRowVersion.Proposed:
return GetProposedRecordNo();
case DataRowVersion.Default:
return GetDefaultRecord();
default:
throw ExceptionBuilder.InvalidRowVersion();
}
}
internal DataRowVersion GetDefaultRowVersion(DataViewRowState viewState) {
if (oldRecord == newRecord) {
if (oldRecord == -1) {
// should be DataView.addNewRow
return DataRowVersion.Default;
}
Debug.Assert(0 != (DataViewRowState.Unchanged & viewState), "not DataViewRowState.Unchanged");
return DataRowVersion.Default;
}
else if (oldRecord == -1) {
Debug.Assert(0 != (DataViewRowState.Added & viewState), "not DataViewRowState.Added");
return DataRowVersion.Default;
}
else if (newRecord == -1) {
Debug.Assert(0 != (DataViewRowState.Deleted & viewState), "not DataViewRowState.Deleted");
return DataRowVersion.Original;
}
else if (0 != (DataViewRowState.ModifiedCurrent & viewState)) {
return DataRowVersion.Default;
}
Debug.Assert(0 != (DataViewRowState.ModifiedOriginal & viewState), "not DataViewRowState.ModifiedOriginal");
return DataRowVersion.Original;
}
internal DataViewRowState GetRecordState(int record) {
if (record == -1)
return DataViewRowState.None;
if (record == oldRecord && record == newRecord)
return DataViewRowState.Unchanged;
if (record == oldRecord)
return(newRecord != -1) ? DataViewRowState.ModifiedOriginal : DataViewRowState.Deleted;
if (record == newRecord)
return(oldRecord != -1) ? DataViewRowState.ModifiedCurrent : DataViewRowState.Added;
return DataViewRowState.None;
}
internal bool HasKeyChanged(DataKey key) {
return HasKeyChanged(key, DataRowVersion.Current, DataRowVersion.Proposed);
}
internal bool HasKeyChanged(DataKey key, DataRowVersion version1, DataRowVersion version2) {
if (!HasVersion(version1) || !HasVersion(version2))
return true;
return !key.RecordsEqual(GetRecordFromVersion(version1), GetRecordFromVersion(version2));
}
///
///
/// Gets a value indicating whether a specified version exists.
///
///
public bool HasVersion(DataRowVersion version) {
switch (version) {
case DataRowVersion.Original:
return(oldRecord != -1);
case DataRowVersion.Current:
return(newRecord != -1);
case DataRowVersion.Proposed:
return(tempRecord != -1);
case DataRowVersion.Default:
return(tempRecord != -1 || newRecord != -1);
default:
throw ExceptionBuilder.InvalidRowVersion();
}
}
internal bool HasChanges() {
if (!HasVersion(DataRowVersion.Original) || !HasVersion(DataRowVersion.Current)) {
return true; // if does not have original, its added row, if does not have current, its deleted row so it has changes
}
foreach(DataColumn dc in Table.Columns) {
if (dc.Compare(oldRecord, newRecord) != 0) {
return true;
}
}
return false;
}
internal bool HaveValuesChanged(DataColumn[] columns) {
return HaveValuesChanged(columns, DataRowVersion.Current, DataRowVersion.Proposed);
}
internal bool HaveValuesChanged(DataColumn[] columns, DataRowVersion version1, DataRowVersion version2) {
for (int i = 0; i < columns.Length; i++) {
CheckColumn(columns[i]);
}
DataKey key = new DataKey(columns, false); // temporary key, don't copy columns
return HasKeyChanged(key, version1, version2);
}
///
///
/// Gets
/// a value indicating whether the column at the specified index contains a
/// null value.
///
///
public bool IsNull(int columnIndex) {
DataColumn column = _columns[columnIndex];
int record = GetDefaultRecord();
return column.IsNull(record);
}
///
///
/// Gets a value indicating whether the named column contains a null value.
///
///
public bool IsNull(string columnName) {
DataColumn column = GetDataColumn(columnName);
int record = GetDefaultRecord();
return column.IsNull(record);
}
///
///
/// Gets a value indicating whether the specified
///
public bool IsNull(DataColumn column) {
CheckColumn(column);
int record = GetDefaultRecord();
return column.IsNull(record);
}
///
/// [To be supplied.]
///
public bool IsNull(DataColumn column, DataRowVersion version) {
CheckColumn(column);
int record = GetRecordFromVersion(version);
return column.IsNull(record);
}
///
///
/// Rejects all changes made to the row since
///
public void RejectChanges() {
IntPtr hscp;
Bid.ScopeEnter(out hscp, " %d#\n", ObjectID);
try {
if (this.RowState != DataRowState.Detached) {
if (_columns.ColumnsImplementingIChangeTrackingCount != _columns.ColumnsImplementingIRevertibleChangeTrackingCount) {
foreach(DataColumn dc in _columns.ColumnsImplementingIChangeTracking) {
if (!dc.ImplementsIRevertibleChangeTracking) {
object value = null;
if (this.RowState != DataRowState.Deleted)
value = this[dc];
else
value = this[dc, DataRowVersion.Original];
if (DBNull.Value != value){
if (((IChangeTracking)value).IsChanged) {
throw ExceptionBuilder.UDTImplementsIChangeTrackingButnotIRevertible(dc.DataType.AssemblyQualifiedName);
}
}
}
}
}
foreach(DataColumn dc in _columns.ColumnsImplementingIChangeTracking) {
object value = null;
if (this.RowState != DataRowState.Deleted)
value = this[dc];
else
value = this[dc, DataRowVersion.Original];
if (DBNull.Value != value) {
IChangeTracking tracking = (IChangeTracking)value;
if (tracking.IsChanged) {
((IRevertibleChangeTracking)value).RejectChanges();
}
}
}
}
_table.RollbackRow(this);
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
internal void ResetLastChangedColumn() {
_lastChangedColumn = null;
_countColumnChange = 0;
}
internal void SetKeyValues(DataKey key, object[] keyValues) {
bool fFirstCall = true;
bool immediate = (tempRecord == -1);
for (int i = 0; i < keyValues.Length; i++) {
object value = this[key.ColumnsReference[i]];
if (!value.Equals(keyValues[i])) {
if (immediate && fFirstCall) {
fFirstCall = false;
BeginEditInternal();
}
this[key.ColumnsReference[i]] = keyValues[i];
}
}
if (!fFirstCall)
EndEdit();
}
// if it's a detached row, we can't add it, we'll just keep it as temp.
internal void SetNewRecord(int record) {
//Debug.Assert(oldRecord != -1 || newRecord != -1, "You can't call SetNewRecord on a detached row.");
_table.SetNewRecord(this, record, DataRowAction.Change, false, true);
}
///
///
/// Sets the specified column's value to a null value.
///
///
protected void SetNull(DataColumn column) {
this[column] = DBNull.Value;
}
internal void SetNestedParentRow(DataRow parentRow, bool setNonNested) {
if (parentRow == null) {
SetParentRowToDBNull();
return;
}
foreach (DataRelation relation in _table.ParentRelations) {
if (relation.Nested || setNonNested) {
if (relation.ParentKey.Table == parentRow._table) {
object[] parentKeyValues = parentRow.GetKeyValues(relation.ParentKey);
this.SetKeyValues(relation.ChildKey, parentKeyValues);
if (relation.Nested) {
if (parentRow._table == _table)
this.CheckForLoops(relation);
else
this.GetParentRow(relation);
}
}
}
}
}
///
/// [To be supplied.]
///
public void SetParentRow(DataRow parentRow) {
SetNestedParentRow(parentRow, true);
}
///
///
/// Sets current row's parent row with specified relation.
///
///
public void SetParentRow(DataRow parentRow, DataRelation relation) {
if (relation == null) {
SetParentRow(parentRow);
return;
}
if (parentRow == null) {
SetParentRowToDBNull(relation);
return;
}
//if (-1 == rowID)
// throw ExceptionBuilder.ChildRowNotInTheTable();
//if (-1 == parentRow.rowID)
// throw ExceptionBuilder.ParentRowNotInTheTable();
if (_table.DataSet != parentRow._table.DataSet)
throw ExceptionBuilder.ParentRowNotInTheDataSet();
if (relation.ChildKey.Table != _table)
throw ExceptionBuilder.SetParentRowTableMismatch(relation.ChildKey.Table.TableName, _table.TableName);
if (relation.ParentKey.Table != parentRow._table)
throw ExceptionBuilder.SetParentRowTableMismatch(relation.ParentKey.Table.TableName, parentRow._table.TableName);
object[] parentKeyValues = parentRow.GetKeyValues(relation.ParentKey);
this.SetKeyValues(relation.ChildKey, parentKeyValues);
}
internal void SetParentRowToDBNull() {
//if (-1 == rowID)
// throw ExceptionBuilder.ChildRowNotInTheTable();
foreach (DataRelation relation in _table.ParentRelations)
SetParentRowToDBNull(relation);
}
internal void SetParentRowToDBNull(DataRelation relation) {
Debug.Assert(relation != null, "The relation should not be null here.");
//if (-1 == rowID)
// throw ExceptionBuilder.ChildRowNotInTheTable();
if (relation.ChildKey.Table != _table)
throw ExceptionBuilder.SetParentRowTableMismatch(relation.ChildKey.Table.TableName, _table.TableName);
object[] parentKeyValues = new object[1];
parentKeyValues[0] = DBNull.Value;
this.SetKeyValues(relation.ChildKey, parentKeyValues);
}
public void SetAdded(){
if (this.RowState == DataRowState.Unchanged) {
_table.SetOldRecord(this, -1);
}
else {
throw ExceptionBuilder.SetAddedAndModifiedCalledOnnonUnchanged();
}
}
public void SetModified(){
if (this.RowState == DataRowState.Unchanged) {
tempRecord = _table.NewRecord(newRecord);
if (tempRecord != -1) {
SetNewRecord(tempRecord);
}
}
else {
throw ExceptionBuilder.SetAddedAndModifiedCalledOnnonUnchanged();
}
}
/*
RecordList contains the empty column storage needed. We need to copy the existing record values into this storage.
*/
internal int CopyValuesIntoStore(ArrayList storeList, ArrayList nullbitList, int storeIndex) {
int recordCount = 0;
if (oldRecord != -1) {//Copy original record for the row in Unchanged, Modified, Deleted state.
for (int i = 0; i < _columns.Count; i++) {
_columns[i].CopyValueIntoStore(oldRecord, storeList[i], (BitArray) nullbitList[i], storeIndex);
}
recordCount++;
storeIndex++;
}
DataRowState state = RowState;
if ((DataRowState.Added == state) || (DataRowState.Modified == state)) { //Copy current record for the row in Added, Modified state.
for (int i = 0; i < _columns.Count; i++) {
_columns[i].CopyValueIntoStore(newRecord, storeList[i], (BitArray) nullbitList[i], storeIndex);
}
recordCount++;
storeIndex++;
}
if (-1 != tempRecord) {//Copy temp record for the row in edit mode.
for (int i = 0; i < _columns.Count; i++) {
_columns[i].CopyValueIntoStore(tempRecord, storeList[i], (BitArray)nullbitList[i], storeIndex);
}
recordCount++;
storeIndex++;
}
return recordCount;
}
[Conditional("DEBUG")]
private void VerifyValueFromStorage(DataColumn column, DataRowVersion version, object valueFromStorage) {
if (column.DataExpression != null && !inChangingEvent && tempRecord == -1)
{
// for unchanged rows, check current if original is asked for.
// this is because by design, there is only single storage for an unchanged row.
if (version == DataRowVersion.Original && oldRecord == newRecord) {
version = DataRowVersion.Current;
}
Debug.Assert(valueFromStorage.Equals(column.DataExpression.Evaluate(this, version)),
"Value from storage does lazily computed expression value");
}
}
}
#if WINFSInternalOnly
internal
#else
public
#endif
sealed class DataRowBuilder {
internal readonly DataTable _table;
internal int _record;
internal DataRowBuilder(DataTable table, int record) {
_table = table;
_record = record;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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