public DmView(DmTable table, IEnumerable <DmRow> rows)
{
if (table == null)
{
return;
}
this.Table = table.Clone();
this.internalFilter(null, rows);
}
public DmView(DmTable table, Predicate <DmRow> filter = null)
{
if (table == null)
{
return;
}
this.internalFilter(filter, table.Rows);
this.Table = table.Clone();
}
public DmView(DmTable table, DmRowState state)
{
if (table == null)
{
return;
}
Predicate <DmRow> filter = new Predicate <DmRow>(r => r.RowState == state);
this.internalFilter(filter, table.Rows);
this.Table = table.Clone();
}
DmTable MergeSchema(DmTable table)
{
if (dataTable == null)
{
dataTable = table.Clone();
if (dataTable.DmSet != null)
{
dataTable.DmSet.Tables.Add(dataTable);
}
}
else
{
// Do the columns
int oldCount = dataTable.Columns.Count;
for (int i = 0; i < table.Columns.Count; i++)
{
DmColumn src = table.Columns[i];
DmColumn dest = (dataTable.Columns.Contains(src.ColumnName, true)) ? dataTable.Columns[src.ColumnName] : null;
// If columns doesn't exist, create it
if (dest == null)
{
dest = src.Clone();
dataTable.Columns.Add(dest);
}
}
// check the PrimaryKey
DmColumn[] targetPKey = dataTable.PrimaryKey.Columns;
DmColumn[] tablePKey = table.PrimaryKey.Columns;
if (targetPKey.Length != tablePKey.Length)
{
if (tablePKey.Length != 0)
{
throw new Exception("Merge Failed, keys are differents");
}
// special case when the target table does not have the PrimaryKey
if (targetPKey.Length == 0)
{
DmColumn[] key = new DmColumn[tablePKey.Length];
for (int i = 0; i < tablePKey.Length; i++)
{
key[i] = dataTable.Columns[tablePKey[i].ColumnName];
}
dataTable.PrimaryKey = new DmKey(key);
}
}
else
{
// Check the keys are same
for (int i = 0; i < targetPKey.Length; i++)
{
if (!table.IsEqual(targetPKey[i].ColumnName, tablePKey[i].ColumnName))
{
throw new Exception("Merge Failed, keys are differents");
}
}
}
}
return(dataTable);
}
