/// <include file='doc\DataRow.uex' path='docs/doc[@for="DataRow.this2"]/*' />
/// <devdoc>
/// <para>Gets or sets
/// the data stored in the specified <see cref='System.Data.DataColumn'/>.</para>
/// </devdoc>
public object this[DataColumn column] {
get {
return(this[column, DataRowVersion.Default]);
}
set {
CheckColumn(column);
#if DEBUG
if (CompModSwitches.Data_ColumnChange.TraceVerbose)
{
Debug.WriteLine("Data_ColumnDataChange - rowID: " + (rowID) + ", columnName: " + column.ColumnName + ", value: <" + Convert.ToString(value) + ">");
}
#endif
if (inChangingEvent)
{
throw ExceptionBuilder.EditInRowChanging();
}
// allow users to tailor the proposed value, or throw an exception.
// note we intentionally do not try/catch this event.
DataColumnChangeEventArgs e = new DataColumnChangeEventArgs(this, column, value);
Table.RaiseColumnChanging(this, e);
// Check null
if (e.ProposedValue == null && column.DataType != typeof(String))
{
throw ExceptionBuilder.CannotSetToNull(column);
}
bool immediate = (tempRecord == -1);
if (immediate)
{
BeginEdit(); // for now force the update. let's try to improve this later.
}
column[GetProposedRecordNo()] = e.ProposedValue;
Table.RaiseColumnChanged(this, e);
if (immediate)
{
EndEdit();
}
}
}
public object this[DataColumn column]
{
get
{
this.CheckColumn(column);
int defaultRecord = this.GetDefaultRecord();
return(column[defaultRecord]);
}
set
{
this.CheckColumn(column);
if (this.inChangingEvent)
{
throw ExceptionBuilder.EditInRowChanging();
}
if ((-1L != this.rowID) && column.ReadOnly)
{
throw ExceptionBuilder.ReadOnly(column.ColumnName);
}
DataColumnChangeEventArgs e = null;
if (this._table.NeedColumnChangeEvents)
{
e = new DataColumnChangeEventArgs(this, column, value);
this._table.OnColumnChanging(e);
}
if (column.Table != this._table)
{
throw ExceptionBuilder.ColumnNotInTheTable(column.ColumnName, this._table.TableName);
}
if ((-1L != this.rowID) && column.ReadOnly)
{
throw ExceptionBuilder.ReadOnly(column.ColumnName);
}
object obj2 = (e != null) ? e.ProposedValue : value;
if (obj2 == null)
{
if (column.IsValueType)
{
throw ExceptionBuilder.CannotSetToNull(column);
}
obj2 = DBNull.Value;
}
bool flag = this.BeginEditInternal();
try
{
int proposedRecordNo = this.GetProposedRecordNo();
column[proposedRecordNo] = obj2;
}
catch (Exception exception)
{
if (ADP.IsCatchableOrSecurityExceptionType(exception) && flag)
{
this.CancelEdit();
}
throw;
}
this.LastChangedColumn = column;
if (e != null)
{
this._table.OnColumnChanged(e);
}
if (flag)
{
this.EndEdit();
}
}
}
