本文整理汇总了C#中System.Data.DataRow.CheckInTable方法的典型用法代码示例。如果您正苦于以下问题:C# DataRow.CheckInTable方法的具体用法?C# DataRow.CheckInTable怎么用?C# DataRow.CheckInTable使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Data.DataRow
的用法示例。
在下文中一共展示了DataRow.CheckInTable方法的4个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: SetOldRecord
// this is the event workhorse... it will throw the changing/changed events
// and update the indexes.
internal void SetOldRecord(DataRow row, int proposedRecord) {
if (!inDataLoad) {
row.CheckInTable();
CheckNotModifying(row);
}
if (proposedRecord == row.oldRecord) {
return;
}
int originalRecord = row.oldRecord; // cache old record after potential RowChanging event
try {
// Check whether we need to update indexes
if (LiveIndexes.Count != 0) {
// Dev10 bug #463087: DataTable internal index is currupted: '5'
if ((-1 == originalRecord) && (-1 != proposedRecord) && (-1 != row.newRecord) && (proposedRecord != row.newRecord)) {
// the transition from DataRowState.Added -> DataRowState.Modified
// with same current record but new original record
// needs to raise an ItemChanged or ItemMoved instead of ItemAdded in the ListChanged event.
// for indexes/views listening for both DataViewRowState.Added | DataViewRowState.ModifiedOriginal
originalRecord = row.newRecord;
}
DataViewRowState originalRecordStatePre = row.GetRecordState(originalRecord);
DataViewRowState proposedRecordStatePre = row.GetRecordState(proposedRecord);
row.oldRecord = proposedRecord;
if (proposedRecord != -1)
this.recordManager[proposedRecord] = row;
DataViewRowState originalRecordStatePost = row.GetRecordState(originalRecord);
DataViewRowState proposedRecordStatePost = row.GetRecordState(proposedRecord);
RecordStateChanged(originalRecord, originalRecordStatePre, originalRecordStatePost,
proposedRecord, proposedRecordStatePre, proposedRecordStatePost);
}
else {
row.oldRecord = proposedRecord;
if (proposedRecord != -1)
this.recordManager[proposedRecord] = row;
}
}
finally {
if ((originalRecord != -1) && (originalRecord != row.tempRecord) &&
(originalRecord != row.oldRecord) && (originalRecord != row.newRecord)) {
FreeRecord(ref originalRecord);
}
// else during an event 'row.AcceptChanges(); row.BeginEdit(); row.EndEdit();'
if (row.RowState == DataRowState.Detached && row.rowID != -1) {
RemoveRow(row, false);
}
}
}
示例2: SetOldRecord
internal void SetOldRecord(DataRow row, int proposedRecord)
{
if (!this.inDataLoad)
{
row.CheckInTable();
this.CheckNotModifying(row);
}
if (proposedRecord != row.oldRecord)
{
int oldRecord = row.oldRecord;
try
{
if (this.LiveIndexes.Count != 0)
{
if (((-1 == oldRecord) && (-1 != proposedRecord)) && ((-1 != row.newRecord) && (proposedRecord != row.newRecord)))
{
oldRecord = row.newRecord;
}
DataViewRowState recordState = row.GetRecordState(oldRecord);
DataViewRowState state3 = row.GetRecordState(proposedRecord);
row.oldRecord = proposedRecord;
if (proposedRecord != -1)
{
this.recordManager[proposedRecord] = row;
}
DataViewRowState state2 = row.GetRecordState(oldRecord);
DataViewRowState state = row.GetRecordState(proposedRecord);
this.RecordStateChanged(oldRecord, recordState, state2, proposedRecord, state3, state);
}
else
{
row.oldRecord = proposedRecord;
if (proposedRecord != -1)
{
this.recordManager[proposedRecord] = row;
}
}
}
finally
{
if (((oldRecord != -1) && (oldRecord != row.tempRecord)) && ((oldRecord != row.oldRecord) && (oldRecord != row.newRecord)))
{
this.FreeRecord(ref oldRecord);
}
if ((row.RowState == DataRowState.Detached) && (row.rowID != -1L))
{
this.RemoveRow(row, false);
}
}
}
}
示例3: SetNewRecordWorker
private void SetNewRecordWorker(DataRow row, int proposedRecord, DataRowAction action, bool isInMerge, bool suppressEnsurePropertyChanged,
int position, bool fireEvent, out Exception deferredException) {
// this is the event workhorse... it will throw the changing/changed events
// and update the indexes. Used by change, add, delete, revert.
// order of execution is as follows
//
// 1) set temp record
// 2) Check constraints for non-expression columns
// 3) Raise RowChanging/RowDeleting with temp record
// 4) set the new record in storage
// 5) Update indexes with recordStateChanges - this will fire ListChanged & PropertyChanged events on associated views
// 6) Evaluate all Expressions (exceptions are deferred)- this will fire ListChanged & PropertyChanged events on associated views
// 7) Raise RowChanged/ RowDeleted
// 8) Check constraints for expression columns
Debug.Assert(row != null, "Row can't be null.");
deferredException = null;
if (row.tempRecord != proposedRecord) {
// $HACK: for performance reasons, EndUpdate calls SetNewRecord with tempRecord == proposedRecord
if (!inDataLoad) {
row.CheckInTable();
CheckNotModifying(row);
}
if (proposedRecord == row.newRecord) {
if (isInMerge) {
Debug.Assert(fireEvent, "SetNewRecord is called with wrong parameter");
RaiseRowChanged(null, row, action);
}
return;
}
Debug.Assert(!row.inChangingEvent, "How can this row be in an infinite loop?");
row.tempRecord = proposedRecord;
}
DataRowChangeEventArgs drcevent = null;
try {
row._action = action;
drcevent = RaiseRowChanging(null, row, action, fireEvent);
}
catch {
row.tempRecord = -1;
throw;
}
finally {
row._action = DataRowAction.Nothing;
}
row.tempRecord = -1;
int currentRecord = row.newRecord;
// if we're deleting, then the oldRecord value will change, so need to track that if it's distinct from the newRecord.
int secondRecord = (proposedRecord != -1 ?
proposedRecord :
(row.RowState != DataRowState.Unchanged ?
row.oldRecord :
-1));
if (action == DataRowAction.Add) { //if we come here from insert we do insert the row to collection
if (position == -1)
Rows.ArrayAdd(row);
else
Rows.ArrayInsert(row, position);
}
List<DataRow> cachedRows = null;
if ((action == DataRowAction.Delete || action == DataRowAction.Change)
&& dependentColumns != null && dependentColumns.Count > 0) {
// if there are expression columns, need to cache related rows for deletes and updates (key changes)
// before indexes are modified.
cachedRows = new List<DataRow>();
for (int j = 0; j < ParentRelations.Count; j++) {
DataRelation relation = ParentRelations[j];
if (relation.ChildTable != row.Table) {
continue;
}
cachedRows.InsertRange(cachedRows.Count, row.GetParentRows(relation));
}
for (int j = 0; j < ChildRelations.Count; j++) {
DataRelation relation = ChildRelations[j];
if (relation.ParentTable != row.Table) {
continue;
}
cachedRows.InsertRange(cachedRows.Count, row.GetChildRows(relation));
}
}
// Dev10 Bug 688779: DataRowView.PropertyChanged are not raised on RejectChanges
// if the newRecord is changing, the propertychanged event should be allowed to triggered for ListChangedType.Changed or .Moved
// unless the specific condition is known that no data has changed, like DataRow.SetModified()
if (!suppressEnsurePropertyChanged && !row.HasPropertyChanged && (row.newRecord != proposedRecord)
&& (-1 != proposedRecord) // explictly not fixing Dev10 Bug 692044: DataRowView.PropertyChanged are not raised on DataTable.Delete when mixing current and original records in RowStateFilter
&& (-1 != row.newRecord)) // explictly not fixing parts of Dev10 Bug 697909: when mixing current and original records in RowStateFilter
{
//.........这里部分代码省略.........
示例4: SetNewRecordWorker
private void SetNewRecordWorker(DataRow row, int proposedRecord, DataRowAction action, bool isInMerge, bool suppressEnsurePropertyChanged, int position, bool fireEvent, out Exception deferredException)
{
deferredException = null;
if (row.tempRecord != proposedRecord)
{
if (!this.inDataLoad)
{
row.CheckInTable();
this.CheckNotModifying(row);
}
if (proposedRecord == row.newRecord)
{
if (isInMerge)
{
this.RaiseRowChanged(null, row, action);
}
return;
}
row.tempRecord = proposedRecord;
}
DataRowChangeEventArgs args = null;
try
{
row._action = action;
args = this.RaiseRowChanging(null, row, action, fireEvent);
}
catch
{
row.tempRecord = -1;
throw;
}
finally
{
row._action = DataRowAction.Nothing;
}
row.tempRecord = -1;
int newRecord = row.newRecord;
int record = (proposedRecord != -1) ? proposedRecord : ((row.RowState != DataRowState.Unchanged) ? row.oldRecord : -1);
if (action == DataRowAction.Add)
{
if (position == -1)
{
this.Rows.ArrayAdd(row);
}
else
{
this.Rows.ArrayInsert(row, position);
}
}
List<DataRow> cachedRows = null;
if (((action == DataRowAction.Delete) || (action == DataRowAction.Change)) && ((this.dependentColumns != null) && (this.dependentColumns.Count > 0)))
{
cachedRows = new List<DataRow>();
for (int i = 0; i < this.ParentRelations.Count; i++)
{
DataRelation relation2 = this.ParentRelations[i];
if (relation2.ChildTable == row.Table)
{
cachedRows.InsertRange(cachedRows.Count, row.GetParentRows(relation2));
}
}
for (int j = 0; j < this.ChildRelations.Count; j++)
{
DataRelation relation = this.ChildRelations[j];
if (relation.ParentTable == row.Table)
{
cachedRows.InsertRange(cachedRows.Count, row.GetChildRows(relation));
}
}
}
if (((!suppressEnsurePropertyChanged && !row.HasPropertyChanged) && ((row.newRecord != proposedRecord) && (-1 != proposedRecord))) && (-1 != row.newRecord))
{
row.LastChangedColumn = null;
row.LastChangedColumn = null;
}
if (this.LiveIndexes.Count != 0)
{
if (((-1 == newRecord) && (-1 != proposedRecord)) && ((-1 != row.oldRecord) && (proposedRecord != row.oldRecord)))
{
newRecord = row.oldRecord;
}
DataViewRowState recordState = row.GetRecordState(newRecord);
DataViewRowState state3 = row.GetRecordState(record);
row.newRecord = proposedRecord;
if (proposedRecord != -1)
{
this.recordManager[proposedRecord] = row;
}
DataViewRowState state2 = row.GetRecordState(newRecord);
DataViewRowState state = row.GetRecordState(record);
this.RecordStateChanged(newRecord, recordState, state2, record, state3, state);
}
else
{
row.newRecord = proposedRecord;
if (proposedRecord != -1)
{
this.recordManager[proposedRecord] = row;
}
}
//.........这里部分代码省略.........