/// <summary>
/// The main method of this class. It deletes one or more rows selected in a grid on the caller form
/// </summary>
/// <param name="ACallerFormOrControl">The form or user control that is making the call. The form must implement the IDeleteGridRows interface</param>
/// <param name="AGrid">A reference to the grid object</param>
/// <param name="APetraUtilsObject">A reference to the PetraUtilsObject associated with the form or control making the call</param>
/// <param name="AButtonPanel">A reference a form or control that implements the IButtonPanel interface. This parameter can be null.</param>
/// <returns>True if any rows were actually deleted</returns>
public static bool DeleteRows(IDeleteGridRows ACallerFormOrControl,
TSgrdDataGrid AGrid,
TFrmPetraEditUtils APetraUtilsObject,
IButtonPanel AButtonPanel)
{
DataRow currentDataRow = ACallerFormOrControl.GetSelectedDataRow();
Int32 currentRowIndex = ACallerFormOrControl.GetSelectedRowIndex();
if ((currentDataRow == null) || (currentRowIndex == -1))
{
return(false);
}
string CompletionMessage = String.Empty;
DataRowView[] HighlightedRows = AGrid.SelectedDataRowsAsDataRowView;
if (HighlightedRows.Length == 1)
{
// Single row deletion
TVerificationResultCollection VerificationResults = null;
if (TVerificationHelper.IsNullOrOnlyNonCritical(APetraUtilsObject.VerificationResultCollection))
{
ACallerFormOrControl.GetReferenceCount(currentDataRow, APetraUtilsObject.MaxReferenceCountOnDelete, out VerificationResults);
}
if ((VerificationResults != null) &&
(VerificationResults.Count > 0))
{
TCascadingReferenceCountHandler countHandler = new TCascadingReferenceCountHandler();
TFrmExtendedMessageBox.TResult result = countHandler.HandleReferences(APetraUtilsObject, VerificationResults, true);
if (result == TFrmExtendedMessageBox.TResult.embrYes)
{
// repeat the count but with no limit to the number of references
ACallerFormOrControl.GetReferenceCount(currentDataRow, 0, out VerificationResults);
countHandler.HandleReferences(APetraUtilsObject, VerificationResults, false);
}
return(false);
}
string DeletionQuestion = ACallerFormOrControl.GetDefaultDeletionQuestion();
bool AllowDeletion = true;
bool DeletionPerformed = false;
ACallerFormOrControl.HandlePreDelete(currentDataRow, ref AllowDeletion, ref DeletionQuestion);
if (AllowDeletion)
{
if ((MessageBox.Show(DeletionQuestion,
MCommonResourcestrings.StrConfirmDeleteTitle,
MessageBoxButtons.YesNo,
MessageBoxIcon.Question,
MessageBoxDefaultButton.Button2) == System.Windows.Forms.DialogResult.Yes))
{
try
{
if (!ACallerFormOrControl.HandleDeleteRow(currentDataRow, ref DeletionPerformed, ref CompletionMessage))
{
currentDataRow.Delete();
DeletionPerformed = true;
}
}
catch (Exception ex)
{
MessageBox.Show(String.Format(MCommonResourcestrings.StrErrorWhileDeleting,
Environment.NewLine, ex.Message),
MCommonResourcestrings.StrGenericError,
MessageBoxButtons.OK,
MessageBoxIcon.Warning);
}
if (DeletionPerformed)
{
APetraUtilsObject.SetChangedFlag();
}
// Select and display the details of the nearest row to the one previously selected
ACallerFormOrControl.SelectRowInGrid(currentRowIndex);
// Clear any errors left over from the deleted row
APetraUtilsObject.VerificationResultCollection.Clear();
if (AButtonPanel != null)
{
AButtonPanel.UpdateRecordNumberDisplay();
}
}
}
if (!ACallerFormOrControl.HandlePostDelete(currentDataRow, AllowDeletion, DeletionPerformed, CompletionMessage))
{
if (DeletionPerformed && (CompletionMessage.Length > 0))
{
MessageBox.Show(CompletionMessage, MCommonResourcestrings.StrDeletionCompletedTitle);
}
}
return(DeletionPerformed);
}
else
{
// Multi-row deletion
int recordsDeleted = 0;
string DeletionQuestion = String.Format(MCommonResourcestrings.StrMultiRowDeletionQuestion,
HighlightedRows.Length,
Environment.NewLine);
DeletionQuestion += MCommonResourcestrings.StrMultiRowDeletionCheck;
if (MessageBox.Show(DeletionQuestion,
MCommonResourcestrings.StrConfirmDeleteTitle,
MessageBoxButtons.YesNo,
MessageBoxIcon.Question,
MessageBoxDefaultButton.Button2) == System.Windows.Forms.DialogResult.Yes)
{
int recordsUndeletable = 0;
int recordsDeleteDisallowed = 0;
List <TMultiDeleteResult> listConflicts = new List <TMultiDeleteResult>();
List <TMultiDeleteResult> listExceptions = new List <TMultiDeleteResult>();
APetraUtilsObject.GetForm().Cursor = Cursors.WaitCursor;
foreach (DataRowView drv in HighlightedRows)
{
DataRow rowToDelete = drv.Row;
if (rowToDelete.RowState == DataRowState.Detached)
{
continue;
}
string rowDetails = MakePKValuesString(rowToDelete);
if (!ACallerFormOrControl.IsRowDeletable(rowToDelete))
{
recordsUndeletable++;
continue;
}
TVerificationResultCollection VerificationResults = null;
ACallerFormOrControl.GetReferenceCount(rowToDelete, APetraUtilsObject.MaxReferenceCountOnDelete, out VerificationResults);
if ((VerificationResults != null) && (VerificationResults.Count > 0))
{
TMultiDeleteResult result = new TMultiDeleteResult(rowDetails,
Messages.BuildMessageFromVerificationResult(String.Empty, VerificationResults));
listConflicts.Add(result);
continue;
}
bool AllowDeletion = true;
bool DeletionPerformed = false;
ACallerFormOrControl.HandlePreDelete(rowToDelete, ref AllowDeletion, ref DeletionQuestion);
if (AllowDeletion)
{
try
{
if (!ACallerFormOrControl.HandleDeleteRow(rowToDelete, ref DeletionPerformed, ref CompletionMessage))
{
rowToDelete.Delete();
DeletionPerformed = true;
}
}
catch (Exception ex)
{
TMultiDeleteResult result = new TMultiDeleteResult(rowDetails, ex.Message);
listExceptions.Add(result);
}
}
else
{
recordsDeleteDisallowed++;
}
if (DeletionPerformed)
{
APetraUtilsObject.SetChangedFlag();
recordsDeleted++;
}
ACallerFormOrControl.HandlePostDelete(rowToDelete, AllowDeletion, DeletionPerformed, String.Empty);
}
APetraUtilsObject.GetForm().Cursor = Cursors.Default;
ACallerFormOrControl.SelectRowInGrid(currentRowIndex);
if (AButtonPanel != null)
{
AButtonPanel.UpdateRecordNumberDisplay();
}
if ((recordsDeleted > 0) && (CompletionMessage.Length > 0))
{
MessageBox.Show(CompletionMessage, MCommonResourcestrings.StrDeletionCompletedTitle);
}
// Show the results of the multi-deletion
string results = null;
if (recordsDeleted > 0)
{
results = String.Format(
Catalog.GetPluralString(MCommonResourcestrings.StrRecordSuccessfullyDeleted,
MCommonResourcestrings.StrRecordsSuccessfullyDeleted, recordsDeleted),
recordsDeleted);
}
else
{
results = MCommonResourcestrings.StrNoRecordsWereDeleted;
}
if (recordsUndeletable > 0)
{
results += String.Format(
Catalog.GetPluralString(MCommonResourcestrings.StrRowNotDeletedBecauseNonDeletable,
MCommonResourcestrings.StrRowsNotDeletedBecauseNonDeletable,
recordsUndeletable),
Environment.NewLine,
recordsUndeletable);
}
if (recordsDeleteDisallowed > 0)
{
results += String.Format(
Catalog.GetPluralString(MCommonResourcestrings.StrRowNotDeletedBecauseDeleteNotAllowed,
MCommonResourcestrings.StrRowsNotDeletedBecauseDeleteNotAllowed,
recordsDeleteDisallowed),
Environment.NewLine,
recordsDeleteDisallowed);
}
bool showCancel = false;
if (listConflicts.Count > 0)
{
showCancel = true;
results += String.Format(
Catalog.GetPluralString(MCommonResourcestrings.StrRowNotDeletedBecauseReferencedElsewhere,
MCommonResourcestrings.StrRowsNotDeletedBecauseReferencedElsewhere,
listConflicts.Count),
Environment.NewLine,
listConflicts.Count);
}
if (listExceptions.Count > 0)
{
showCancel = true;
results += String.Format(
Catalog.GetPluralString(MCommonResourcestrings.StrRowNotDeletedDueToUnexpectedException,
MCommonResourcestrings.StrRowNotDeletedDueToUnexpectedException,
listExceptions.Count),
Environment.NewLine,
listExceptions.Count);
}
if (showCancel)
{
results += String.Format(MCommonResourcestrings.StrClickToReviewDeletionOrCancel, Environment.NewLine);
if (MessageBox.Show(results,
MCommonResourcestrings.StrDeleteActionSummaryTitle,
MessageBoxButtons.OKCancel,
MessageBoxIcon.Warning) == System.Windows.Forms.DialogResult.OK)
{
ReviewMultiDeleteResults(listConflicts, MCommonResourcestrings.StrRowsReferencedByOtherTables);
ReviewMultiDeleteResults(listExceptions, MCommonResourcestrings.StrExceptions);
}
}
else
{
MessageBox.Show(results,
MCommonResourcestrings.StrDeleteActionSummaryTitle,
MessageBoxButtons.OK,
MessageBoxIcon.Information);
}
}
return(recordsDeleted > 0);
}
}
/// <summary>
/// The main method of this class. It deletes one or more rows selected in a grid on the caller form
/// </summary>
/// <param name="ACallerFormOrControl">The form or user control that is making the call. The form must implement the IDeleteGridRows interface</param>
/// <param name="AGrid">A reference to the grid object</param>
/// <param name="APetraUtilsObject">A reference to the PetraUtilsObject associated with the form or control making the call</param>
/// <param name="AButtonPanel">A reference a form or control that implements the IButtonPanel interface. This parameter can be null.</param>
/// <returns>True if any rows were actually deleted</returns>
public static bool DeleteRows(IDeleteGridRows ACallerFormOrControl,
TSgrdDataGrid AGrid,
TFrmPetraEditUtils APetraUtilsObject,
IButtonPanel AButtonPanel)
{
DataRow currentDataRow = ACallerFormOrControl.GetSelectedDataRow();
Int32 currentRowIndex = ACallerFormOrControl.GetSelectedRowIndex();
if ((currentDataRow == null) || (currentRowIndex == -1))
{
return false;
}
string CompletionMessage = String.Empty;
DataRowView[] HighlightedRows = AGrid.SelectedDataRowsAsDataRowView;
if (HighlightedRows.Length == 1)
{
// Single row deletion
TVerificationResultCollection VerificationResults = null;
if (TVerificationHelper.IsNullOrOnlyNonCritical(APetraUtilsObject.VerificationResultCollection))
{
ACallerFormOrControl.GetReferenceCount(currentDataRow, APetraUtilsObject.MaxReferenceCountOnDelete, out VerificationResults);
}
if ((VerificationResults != null)
&& (VerificationResults.Count > 0))
{
TCascadingReferenceCountHandler countHandler = new TCascadingReferenceCountHandler();
TFrmExtendedMessageBox.TResult result = countHandler.HandleReferences(APetraUtilsObject, VerificationResults, true);
if (result == TFrmExtendedMessageBox.TResult.embrYes)
{
// repeat the count but with no limit to the number of references
ACallerFormOrControl.GetReferenceCount(currentDataRow, 0, out VerificationResults);
countHandler.HandleReferences(APetraUtilsObject, VerificationResults, false);
}
return false;
}
string DeletionQuestion = ACallerFormOrControl.GetDefaultDeletionQuestion();
bool AllowDeletion = true;
bool DeletionPerformed = false;
ACallerFormOrControl.HandlePreDelete(currentDataRow, ref AllowDeletion, ref DeletionQuestion);
if (AllowDeletion)
{
if ((MessageBox.Show(DeletionQuestion,
MCommonResourcestrings.StrConfirmDeleteTitle,
MessageBoxButtons.YesNo,
MessageBoxIcon.Question,
MessageBoxDefaultButton.Button2) == System.Windows.Forms.DialogResult.Yes))
{
try
{
if (!ACallerFormOrControl.HandleDeleteRow(currentDataRow, ref DeletionPerformed, ref CompletionMessage))
{
currentDataRow.Delete();
DeletionPerformed = true;
}
}
catch (Exception ex)
{
MessageBox.Show(String.Format(MCommonResourcestrings.StrErrorWhileDeleting,
Environment.NewLine, ex.Message),
MCommonResourcestrings.StrGenericError,
MessageBoxButtons.OK,
MessageBoxIcon.Warning);
}
if (DeletionPerformed)
{
APetraUtilsObject.SetChangedFlag();
}
// Select and display the details of the nearest row to the one previously selected
ACallerFormOrControl.SelectRowInGrid(currentRowIndex);
// Clear any errors left over from the deleted row
APetraUtilsObject.VerificationResultCollection.Clear();
if (AButtonPanel != null)
{
AButtonPanel.UpdateRecordNumberDisplay();
}
}
}
if (!ACallerFormOrControl.HandlePostDelete(currentDataRow, AllowDeletion, DeletionPerformed, CompletionMessage))
{
if (DeletionPerformed && (CompletionMessage.Length > 0))
{
MessageBox.Show(CompletionMessage, MCommonResourcestrings.StrDeletionCompletedTitle);
}
}
return DeletionPerformed;
}
else
{
// Multi-row deletion
int recordsDeleted = 0;
string DeletionQuestion = String.Format(MCommonResourcestrings.StrMultiRowDeletionQuestion,
HighlightedRows.Length,
Environment.NewLine);
DeletionQuestion += MCommonResourcestrings.StrMultiRowDeletionCheck;
if (MessageBox.Show(DeletionQuestion,
MCommonResourcestrings.StrConfirmDeleteTitle,
MessageBoxButtons.YesNo,
MessageBoxIcon.Question,
MessageBoxDefaultButton.Button2) == System.Windows.Forms.DialogResult.Yes)
{
int recordsUndeletable = 0;
int recordsDeleteDisallowed = 0;
List <TMultiDeleteResult>listConflicts = new List <TMultiDeleteResult>();
List <TMultiDeleteResult>listExceptions = new List <TMultiDeleteResult>();
APetraUtilsObject.GetForm().Cursor = Cursors.WaitCursor;
foreach (DataRowView drv in HighlightedRows)
{
DataRow rowToDelete = drv.Row;
string rowDetails = MakePKValuesString(rowToDelete);
if (!ACallerFormOrControl.IsRowDeletable(rowToDelete))
{
recordsUndeletable++;
continue;
}
TVerificationResultCollection VerificationResults = null;
ACallerFormOrControl.GetReferenceCount(rowToDelete, APetraUtilsObject.MaxReferenceCountOnDelete, out VerificationResults);
if ((VerificationResults != null) && (VerificationResults.Count > 0))
{
TMultiDeleteResult result = new TMultiDeleteResult(rowDetails,
Messages.BuildMessageFromVerificationResult(String.Empty, VerificationResults));
listConflicts.Add(result);
continue;
}
bool AllowDeletion = true;
bool DeletionPerformed = false;
ACallerFormOrControl.HandlePreDelete(rowToDelete, ref AllowDeletion, ref DeletionQuestion);
if (AllowDeletion)
{
try
{
if (!ACallerFormOrControl.HandleDeleteRow(rowToDelete, ref DeletionPerformed, ref CompletionMessage))
{
rowToDelete.Delete();
DeletionPerformed = true;
}
}
catch (Exception ex)
{
TMultiDeleteResult result = new TMultiDeleteResult(rowDetails, ex.Message);
listExceptions.Add(result);
}
}
else
{
recordsDeleteDisallowed++;
}
if (DeletionPerformed)
{
APetraUtilsObject.SetChangedFlag();
recordsDeleted++;
}
ACallerFormOrControl.HandlePostDelete(rowToDelete, AllowDeletion, DeletionPerformed, String.Empty);
}
APetraUtilsObject.GetForm().Cursor = Cursors.Default;
ACallerFormOrControl.SelectRowInGrid(currentRowIndex);
if (AButtonPanel != null)
{
AButtonPanel.UpdateRecordNumberDisplay();
}
if ((recordsDeleted > 0) && (CompletionMessage.Length > 0))
{
MessageBox.Show(CompletionMessage, MCommonResourcestrings.StrDeletionCompletedTitle);
}
// Show the results of the multi-deletion
string results = null;
if (recordsDeleted > 0)
{
results = String.Format(
Catalog.GetPluralString(MCommonResourcestrings.StrRecordSuccessfullyDeleted,
MCommonResourcestrings.StrRecordsSuccessfullyDeleted, recordsDeleted),
recordsDeleted);
}
else
{
results = MCommonResourcestrings.StrNoRecordsWereDeleted;
}
if (recordsUndeletable > 0)
{
results += String.Format(
Catalog.GetPluralString(MCommonResourcestrings.StrRowNotDeletedBecauseNonDeletable,
MCommonResourcestrings.StrRowsNotDeletedBecauseNonDeletable,
recordsUndeletable),
Environment.NewLine,
recordsUndeletable);
}
if (recordsDeleteDisallowed > 0)
{
results += String.Format(
Catalog.GetPluralString(MCommonResourcestrings.StrRowNotDeletedBecauseDeleteNotAllowed,
MCommonResourcestrings.StrRowsNotDeletedBecauseDeleteNotAllowed,
recordsDeleteDisallowed),
Environment.NewLine,
recordsDeleteDisallowed);
}
bool showCancel = false;
if (listConflicts.Count > 0)
{
showCancel = true;
results += String.Format(
Catalog.GetPluralString(MCommonResourcestrings.StrRowNotDeletedBecauseReferencedElsewhere,
MCommonResourcestrings.StrRowsNotDeletedBecauseReferencedElsewhere,
listConflicts.Count),
Environment.NewLine,
listConflicts.Count);
}
if (listExceptions.Count > 0)
{
showCancel = true;
results += String.Format(
Catalog.GetPluralString(MCommonResourcestrings.StrRowNotDeletedDueToUnexpectedException,
MCommonResourcestrings.StrRowNotDeletedDueToUnexpectedException,
listExceptions.Count),
Environment.NewLine,
listExceptions.Count);
}
if (showCancel)
{
results += String.Format(MCommonResourcestrings.StrClickToReviewDeletionOrCancel, Environment.NewLine);
if (MessageBox.Show(results,
MCommonResourcestrings.StrDeleteActionSummaryTitle,
MessageBoxButtons.OKCancel,
MessageBoxIcon.Warning) == System.Windows.Forms.DialogResult.OK)
{
ReviewMultiDeleteResults(listConflicts, MCommonResourcestrings.StrRowsReferencedByOtherTables);
ReviewMultiDeleteResults(listExceptions, MCommonResourcestrings.StrExceptions);
}
}
else
{
MessageBox.Show(results,
MCommonResourcestrings.StrDeleteActionSummaryTitle,
MessageBoxButtons.OK,
MessageBoxIcon.Information);
}
}
return recordsDeleted > 0;
}
}
