public void RemoveColumn(int columnIndex)
{
//when user remove column or change column name
//we must update index
_dataColumns.RemoveAt(columnIndex);
_columnNameState = ColumnNameState.Dirty;
}
void ValidateColumnNames()
{
_colNames.Clear();
int j = _dataColumns.Count;
for (int i = 0; i < j; ++i)
{
DataColumn col = _dataColumns[i];
_colNames[col.ColumnName] = i;
}
_columnNameState = ColumnNameState.OK;
}
public DataColumn CreateDataColumn(string colName)
{
if (!_colNames.ContainsKey(colName))
{
var dataColumn = new DataColumn(this, colName);
_dataColumns.Add(dataColumn);
_columnNameState = ColumnNameState.Dirty;
return(dataColumn);
}
else
{
throw new Exception("duplicate coloumn name " + colName);
}
}
internal void InvalidateColumnNameState()
{
_columnNameState = ColumnNameState.Dirty;
}
