Include:
Set the constant value as the dropdown list items.
(1) For the dropdown list, such as:

Type the constant value at the blank.
Using "Up" and "Down" to move the sequence of the dropdown list items.
(2) For tree view, such as:

Add - add a new node
Add son- add a branch of the above node
Update - select a node to modify.
Remove - remove a selected node.
(1) Dropdown list

Table name: intended table name for selection.
Value Field: the column name for the selected data table.
Input Condition:

The dropdown list items are supposed to fit all the selected values.
(2) Tree view

Table Name: the name of the table
Value Field: the column name of the selected data table.
Key Field: the field names for the nodes of the tree.
Parent Key Field: the root name
Input Condition:
