public CustomParentNode(QTableFunction tableFunction)
: base(tableFunction.Name)
{
this.tableFunction = tableFunction;
}
//=============Handling item selecting on TreeView=================================//
private void tvAvailableColumns_AfterSelect(object sender, TreeViewEventArgs e)
{
if (e.Node.ForeColor == Color.Purple) //if a node is purple, that means a user select already, simply returns
{
return;
}
if (e.Node.Parent != null && e.Node.Parent.GetType() == typeof(CustomParentNode)) //if select child node which is column of a table
{
CustomParentNode cpn = (CustomParentNode)e.Node.Parent;
CustomChildNode ccn = (CustomChildNode)e.Node;
table = cpn.Table;
view = cpn.View;
tableFunction = cpn.TableFunction;
if (view == null && tableFunction == null)
tableName = table.Name;
else if (table == null && tableFunction == null)
tableName = view.Name;
else if (table != null && view == null)
tableName = tableFunction.Name;
index++;
columnName = ccn.Column.Name;
alias = ccn.Column.Alias;
dataType = ccn.Column.DataType;
populateDataGridView(dgvSelectedColumns);
e.Node.Parent.ForeColor = Color.Purple;
e.Node.ForeColor = Color.Purple;
//-------------------------------------Tricky part here:------------------------------------------------------//
//check dictionary for values of a given key. If the key has no value, add new value associated with key
//If the dictionary already has the key, add more values for that key
List<QColumn> existing;
if (!sqlFields.TryGetValue(tableName, out existing))
{
existing = new List<QColumn>();
sqlFields[tableName] = existing;
}
QColumn c = new QColumn(tableName + "." + "[" + columnName + "]", dataType);
c.Index = index;
existing.Add(c);
existing.Sort();
//-------------------------------------End Tricky part here:------------------------------------------------------//
//after we populate our dictionary, pull out keys and list of value
populateSelectedTableList();
if (selectedColumns.Count == 0)
{
populateSelectedColumnList();
}
else
{
QColumn col = new QColumn(tableName + "." + "[" + columnName + "]", dataType);
col.Index = index;
selectedColumns.Add(col);
selectedColumns.Sort();
}
}
else
{
tableName = e.Node.Text;
columnName = "*";
}
bindGroupColumns();
generateSQLStatement();
}