private List <PreviewRowItem> getPreviewRowItems()
{
List <PreviewRowItem> previewRowItems = new List <PreviewRowItem>();
//this is where you would get the parse tree from the expressionwindow, and then execute the tree for each row.
FieldCalculationParser.ParseTreeNode tree = TestWindow.GetTree;
FieldCalculationParser.ParseTreeNode.Initialize();//clear all errors.
if (tree != null)
{
Database.Reader.SqLiteReader reader = new Database.Reader.SqLiteReader(_filePath, _tableName);
object[] row;
List <string> usedheaders = tree.GetHeaderNames();
string[] uniqueheaders = getUniqueHeaders(usedheaders);
tree.SetColNums(uniqueheaders.ToList());
Int64 count = reader.RowCount();
List <int> selectedRows = null;
List <object> output = new List <object>();
reader.Open();
object[] original = reader.Column(_columnName);
object[] primaryKeys = reader.Column(_selectionColumnName);
//needs to operate on selected rows or not.
//ifselected rows, update the entire column, but put the original value in for non selected rows.
if (UseSelection)
{
selectedRows = new List <int>();
object[] tmp = reader.Column(_selectionColumnName);
foreach (long uid in _selectedKeys)
{
selectedRows.Add(Array.IndexOf(tmp, uid));
}
}
for (int i = 0; i < count; i++)
{
if (!UseSelection || selectedRows.Contains(i))
{
FieldCalculationParser.ParseTreeNode.RowOrCellNum = (int)i;//whatever.
if (uniqueheaders.Count() > 0)
{
row = reader.Row((int)i, uniqueheaders);
tree.Update(ref row);
}
output.Add(tree.Evaluate().GetResult);
}
else
{
output.Add(original[i]);
}
previewRowItems.Add(new PreviewRowItem(primaryKeys[i], original[i], output[i]));
}
reader.Close();
}
if (tree.GetComputeErrors.Count > 1)
{
//do not write to file.
StringBuilder s = new StringBuilder();
foreach (string o in tree.GetComputeErrors)
{
s.AppendLine(o);
}
ErrorWindow err = new ErrorWindow(s.ToString());
err.Title = "Output";
err.ShowDialog();
}
return(previewRowItems);
}
private void CmdExecute_Click(object sender, RoutedEventArgs e)
{
//this is where you would get the parse tree from the expressionwindow, and then execute the tree for each row.
FieldCalculationParser.ParseTreeNode tree = TestWindow.GetTree;
FieldCalculationParser.ParseTreeNode.Initialize();//clear all errors.
if (tree != null)
{
Database.Reader.SqLiteReader reader = new Database.Reader.SqLiteReader(_filePath, _tableName);
object[] row;
List <string> usedheaders = tree.GetHeaderNames(); //will include duplicates
string[] uniqueheaders = getUniqueHeaders(usedheaders); //removes duplicates
tree.SetColNums(uniqueheaders.ToList()); //lets the tree know what index in the array of object to look for for each header.
Int64 count = reader.RowCount();
List <long> output = new List <long>();
reader.Open();
//needs to operate on selected rows or not.
//ifselected rows, only iterate on the current selection.
if (UseSelection)
{
object[] tmp = reader.Column(_selectionColumnName);
List <int> items = new List <int>();
int idx = 0;
foreach (long uid in _selectedKeys)
{
idx = Array.IndexOf(tmp, uid);
FieldCalculationParser.ParseTreeNode.RowOrCellNum = idx;
if (uniqueheaders.Count() > 0)
{
row = reader.Row(idx, uniqueheaders);
tree.Update(ref row);
}
if ((bool)tree.Evaluate().GetResult)
{
//select it!
output.Add(uid);
}
}
}
else
{
object[] uniqueIDS = reader.Column(_selectionColumnName);
for (Int64 i = 0; i < count; i++)
{
FieldCalculationParser.ParseTreeNode.RowOrCellNum = (int)i;//whatever.
if (uniqueheaders.Count() > 0)
{
row = reader.Row((int)i, uniqueheaders);
tree.Update(ref row);
}
if ((bool)tree.Evaluate().GetResult)
{
//select it!
output.Add((long)uniqueIDS[i]);
}
}
}
reader.Close();
if (tree.GetComputeErrors.Count > 1)
{
//do not update selection
StringBuilder s = new StringBuilder();
foreach (string o in tree.GetComputeErrors)
{
s.AppendLine(o);
}
ErrorWindow err = new ErrorWindow(s.ToString());
err.Title = "Output";
err.ShowDialog();
}
else
{
//update _selectedKeys;
SelectedKeys = output;
//raise event?
FilterWasSuccessful = true;
Close();
}
}
}
