/// <summary>
/// Clone then import rows
/// </summary>
public DmTable Copy()
{
try
{
DmTable destTable = this.Clone();
foreach (DmRow row in Rows)
{
destTable.ImportRow(row);
}
return(destTable);
}
finally
{
}
}
public DmSet GetChanges(DmRowState rowStates)
{
DmSet dsNew = null;
if (0 != (rowStates & ~(DmRowState.Added | DmRowState.Deleted | DmRowState.Modified | DmRowState.Unchanged)))
{
throw new Exception($"InvalidRowState {rowStates}");
}
// Initialize all the individual table bitmaps.
TableChanges[] bitMatrix = new TableChanges[Tables.Count];
for (int i = 0; i < bitMatrix.Length; ++i)
{
bitMatrix[i] = new TableChanges(Tables[i].Rows.Count);
}
// find all the modified rows and their parents
MarkModifiedRows(bitMatrix, rowStates);
// copy the changes to a cloned table
for (int i = 0; i < bitMatrix.Length; ++i)
{
Debug.Assert(0 <= bitMatrix[i].HasChanges, "negative change count");
if (0 < bitMatrix[i].HasChanges)
{
if (dsNew == null)
{
dsNew = this.Clone();
}
DmTable table = this.Tables[i];
DmTable destTable = dsNew.Tables.First(t => t.TableName == table.TableName);
for (int j = 0; 0 < bitMatrix[i].HasChanges; ++j)
{ // Loop through the rows.
if (bitMatrix[i][j])
{
destTable.ImportRow(table.Rows[j]);
bitMatrix[i].HasChanges--;
}
}
}
}
return(dsNew);
}
/// <summary>
/// Get Changes from the DmTable, with a DmRowState value
/// </summary>
public DmTable GetChanges(DmRowState rowStates)
{
DmTable dtChanges = this.Clone();
DmRow row = null;
for (int i = 0; i < Rows.Count; i++)
{
row = Rows[i];
if ((row.RowState & rowStates) == row.RowState)
{
dtChanges.ImportRow(row);
}
}
if (dtChanges.Rows.Count == 0)
{
return(null);
}
return(dtChanges);
}
/// <summary>
/// Get Changes from the DmTable
/// </summary>
public DmTable GetChanges()
{
DmTable dtChanges = this.Clone();
DmRow row = null;
for (int i = 0; i < Rows.Count; i++)
{
row = Rows[i];
if (row.oldRecord != row.newRecord)
{
dtChanges.ImportRow(row);
}
}
if (dtChanges.Rows.Count == 0)
{
return(null);
}
return(dtChanges);
}