private void OnDataConversionError(DataGridDataErrorEventArgs dataError)
{
EventHandler <DataGridDataErrorEventArgs> handler = this.DataConversionError;
if (handler != null)
{
handler(this, dataError);
}
}
private void DataGridValueConverter_DataConversionError(object sender, DataGridDataErrorEventArgs dataError)
{
Debug.Assert(dataError != null);
Debug.Assert(sender is DataGridValueConverter);
if (this.OwningGrid != null)
{
this.OwningGrid.OnDataConversionError(dataError);
}
}
private void OnDataConversionError(DataGridDataErrorEventArgs dataError)
{
EventHandler<DataGridDataErrorEventArgs> handler = this.DataConversionError;
if (handler != null)
{
handler(this, dataError);
}
}
private DataGridDataErrorEventArgs CommitRowEdit(bool exitEditingMode)
{
if (this._editingRow == null)
{
return null;
}
Debug.Assert(this.EditingRowIndex >= -1);
Debug.Assert(this.EditingRowIndex < this._rowCount);
DataGridDataErrorEventArgs dataError = null;
DataGridRowCancelEventArgs e = new DataGridRowCancelEventArgs(this._editingRow);
OnCommittingRowEdit(e);
if (e.Cancel)
{
dataError = new DataGridDataErrorEventArgs(null, this.CurrentColumn, this._editingRow);
dataError.Cancel = true;
return dataError;
}
try
{
if (!this.DataConnection.EndEdit(this._editingRow.DataContext))
{
dataError = new DataGridDataErrorEventArgs(null, this.CurrentColumn, this._editingRow);
return dataError;
}
if (!exitEditingMode && !this.DataConnection.BeginEdit(this._editingRow.DataContext))
{
dataError = new DataGridDataErrorEventArgs(null, this.CurrentColumn, this._editingRow);
return dataError;
}
}
catch (Exception ex)
{
dataError = new DataGridDataErrorEventArgs(ex, this.CurrentColumn, this._editingRow);
OnDataError(dataError);
return dataError;
}
return null;
}
private DataGridDataErrorEventArgs CommitCellEditPrivate()
{
if (this._editingColumnIndex == -1)
{
return null;
}
Debug.Assert(this._editingColumnIndex >= 0);
Debug.Assert(this._editingColumnIndex < this.ColumnsItemsInternal.Count);
Debug.Assert(this._editingRow != null);
DataGridDataErrorEventArgs dataError = null;
DataGridColumnBase dataGridColumn = this.ColumnsItemsInternal[this._editingColumnIndex];
FrameworkElement element = this._editingRow.Cells[this._editingColumnIndex].Content as FrameworkElement;
DataGridCellCancelEventArgs e = new DataGridCellCancelEventArgs(dataGridColumn, this._editingRow, element);
OnCommittingCellEdit(e);
if (e.Cancel)
{
dataError = new DataGridDataErrorEventArgs(null, this.CurrentColumn, this._editingRow);
dataError.Cancel = true;
return dataError;
}
// Write the new cell value into the backend for non-bound cells.
DataGridBoundColumnBase dataGridBoundColumn = dataGridColumn as DataGridBoundColumnBase;
try
{
if (dataGridBoundColumn == null)
{
//
OnCommitCellEdit(new DataGridCellEventArgs(dataGridColumn, this._editingRow, element));
}
}
catch (Exception ex)
{
dataError = new DataGridDataErrorEventArgs(ex, this.CurrentColumn, this._editingRow);
OnDataError(dataError);
return dataError;
}
return null;
}
private DataGridDataErrorEventArgs CancelRowEdit(bool exitEditingMode)
{
if (this._editingRow == null)
{
return null;
}
Debug.Assert(this.EditingRowIndex >= -1);
Debug.Assert(this.EditingRowIndex < this._rowCount);
DataGridDataErrorEventArgs dataError = null;
try
{
object dataItem = this._editingRow.DataContext;
if (!this.DataConnection.CancelEdit(dataItem))
{
dataError = new DataGridDataErrorEventArgs(null, this.CurrentColumn, this._editingRow);
return dataError;
}
//
foreach (DataGridColumnBase dataGridColumn in this.Columns)
{
if (!exitEditingMode && dataGridColumn.Index == this._editingColumnIndex && dataGridColumn is DataGridBoundColumnBase)
{
continue;
}
PopulateCellContent(true /*forceTemplating*/, !exitEditingMode && dataGridColumn.Index == this._editingColumnIndex /*isCellEdited*/, dataGridColumn, this._editingRow, this._editingRow.Cells[dataGridColumn.Index]);
}
if (!exitEditingMode && !this.DataConnection.BeginEdit(dataItem))
{
dataError = new DataGridDataErrorEventArgs(null, this.CurrentColumn, this._editingRow);
return dataError;
}
}
catch (Exception ex)
{
dataError = new DataGridDataErrorEventArgs(ex, this.CurrentColumn, this._editingRow);
OnDataError(dataError);
return dataError;
}
return null;
}
private DataGridDataErrorEventArgs CancelCellEdit(bool exitEditingMode)
{
if (this._editingColumnIndex == -1)
{
return null;
}
Debug.Assert(this._editingColumnIndex >= 0);
Debug.Assert(this._editingColumnIndex < this.ColumnsItemsInternal.Count);
Debug.Assert(this._editingRow != null);
DataGridDataErrorEventArgs dataError = null;
DataGridColumnBase dataGridColumn = this.ColumnsItemsInternal[this._editingColumnIndex];
DataGridCell dataGridCell = this._editingRow.Cells[this._editingColumnIndex];
// Write the old cell value back into the cell content.
DataGridBoundColumnBase dataGridBoundColumn = dataGridColumn as DataGridBoundColumnBase;
try
{
if (dataGridBoundColumn != null)
{
dataGridBoundColumn.CancelCellEdit(this._uneditedValue);
}
else
{
DataGridTemplateColumn dataGridTemplateColumn = dataGridColumn as DataGridTemplateColumn;
if (dataGridTemplateColumn != null)
{
PopulateCellContent(true /*forceTemplating*/, !exitEditingMode /*isCellEdited*/, dataGridTemplateColumn, this._editingRow, dataGridCell);
}
}
}
catch (Exception ex)
{
dataError = new DataGridDataErrorEventArgs(ex, this.CurrentColumn, this._editingRow);
OnDataError(dataError);
return dataError;
}
return null;
}
private bool BeginRowEdit(DataGridRow dataGridRow)
{
//
Debug.Assert(this._editingRow == null);
Debug.Assert(dataGridRow != null);
Debug.Assert(this.CurrentRowIndex >= -1);
Debug.Assert(this.CurrentRowIndex < this._rowCount);
//
try
{
if (this.DataConnection.BeginEdit(dataGridRow.DataContext))
{
this._editingRow = dataGridRow;
if (this.AreRowHeadersVisible)
{
this._editingRow.HeaderCell.ApplyRowStatus(true /*animate*/);
}
this._editingRow.ApplyBackgroundBrush(true /*animate*/);
//
return true;
}
//
return false;
}
catch (Exception ex)
{
DataGridDataErrorEventArgs dataError = new DataGridDataErrorEventArgs(ex, this.CurrentColumn, this._editingRow);
OnDataError(dataError);
if (dataError.ThrowException)
{
throw dataError.Exception;
}
}
//
return false;
}
//
/// <summary>
/// A cell value parsing or formatting failed
/// </summary>
internal void OnDataConversionError(DataGridDataErrorEventArgs dataError)
{
Debug.Assert(dataError != null);
Debug.Assert(dataError.Exception != null);
Debug.Assert(dataError.Column != null);
if (dataError.Column.OwningGrid == this &&
(dataError.Row == null || dataError.Row.OwningGrid == this))
{
OnDataError(dataError);
if (dataError.ThrowException)
{
throw dataError.Exception;
}
}
}
/// <summary>
/// Raises the DataError event.
/// </summary>
protected virtual void OnDataError(DataGridDataErrorEventArgs e)
{
EventHandler<DataGridDataErrorEventArgs> handler = this.DataError;
if (handler != null)
{
handler(this, e);
}
}
private void DataGridValueConverter_DataConversionError(object sender, DataGridDataErrorEventArgs dataError)
{
Debug.Assert(dataError != null);
Debug.Assert(sender is DataGridValueConverter);
if (this.OwningGrid != null)
{
this.OwningGrid.OnDataConversionError(dataError);
}
}
