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Visual Data Access | Configuring DADE

The first step in configuring DADE for your end users involves setting the properties of the DataSettings object of the Designer component.

This object contains the following properties:
 
Property Description
AllowEditSQL Determines whether or not the end-user can edit the SQL in the Query Designer.
DatabaseName The name of the database from which data will be retrieved when the query executes.
DataDictionary The data dictionary object that will convert raw table and field names to aliases.
SessionType Defaults to BDESession. Should only be changed if you have created your own Session class in order to use the Query Wizard with a proprietary database engine.
SQLType Defaults to sqBDELocal. If you are not using dBase or Paradox tables, then you should set this property to sqSQL1, as the Local SQL dialect is not supported by most other database types. If your database supports ANSI-92 SQL, then you can set this property to sqSQL2 instead of sqSQL1.
UseDataDictionary Determines whether the data dictionary object assigned to the DataDictionary property will be used.

If you intend to use the Query Wizard and Query Designer, then the SQLType is vital. The following table shows the recommended SQLType for a given database product.

Database Product SQLType
Paradox sqBDELocal
Interbase SQL2
Oracle SQL1
MS Access SQL2
Sybase SQL Server SQL1
Sybase SQL Anywhere SQL2
MS SQL Server SQL1
 

Once you have configured the data settings, you may notice that a Data Settings menu option appears on the File menu of the data workspace when you run your application. This option displays a dialog that allows the end-user to modify the data settings (pictured below). If you do not want the end-user to be able to change these settings, then you can set the AllowDataSettingsChange property of the Designer component to False.