DataTableに列を追加しようとしています。
列をうまく追加できます。ただし、これらの新しい列の行設定値をループすると、DataRow.ItemArrayは更新されません。これが私のコードです:
private void UpdateTabularDataTable(SqlConnection connection)
{
// when I add these columns, it works fine.
var rejectedColumn = table.Columns.Add(Constants.RejectedUiColumnName, typeof(bool));
var rejectedReasonColumn = table.Columns.Add(Constants.RejectedReasonUiColumnName, typeof(string));
foreach (var row in table.Rows.Cast<DataRow>())
{
var contourId = (Guid)row.ItemArray[0];
// this is a Dictionary of objects which are rejected. The others are accepted.
string rejectedReason;
var isRejected = _rejectedParticleReasonHolder.TryGetValue(contourId.ToString(), out rejectedReason);
// these assignments don't work. There's no exception; they
// just don't update the relevant values on the object.
// Also, I verified that the Ordinal values are correct.
row.ItemArray[rejectedColumn.Ordinal] = isRejected;
row.ItemArray[rejectedReasonColumn.Ordinal] = rejectedReason;
}
}
}
}