How to Create Database Applications with Longtion Application Builder 5.7
Longtion Application Builder 5.7 is a powerful tool that allows you to create database applications without writing any code. You can design and generate the user interface, connect to various databases, create reports and charts, and publish your applications as standalone executables or web applications.
In this article, we will show you how to use Longtion Application Builder 5.7 to create a simple database application that manages customer information. You will learn how to:
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Create a new project and define the database connection
Design the main form and add controls
Create a query and bind it to a grid control
Add buttons to perform CRUD operations
Generate and test the application
By the end of this article, you will have a fully functional database application that you can customize and extend according to your needs.
Create a New Project and Define the Database Connection
To start creating your database application, you need to launch Longtion Application Builder 5.7 and create a new project. You can do this by clicking on the File menu and selecting New Project. You will be prompted to choose a project type and a name for your project. For this example, we will choose Database Application as the project type and CustomerManager as the project name.
After creating the project, you need to define the database connection that your application will use. You can do this by clicking on the Database menu and selecting Database Connection. You will see a dialog box where you can choose from various database types, such as Microsoft Access, Microsoft SQL Server, MySQL, Oracle, SQLite, etc. For this example, we will use Microsoft Access as the database type and select an existing database file called Customers.accdb that contains a table called Customers with some sample data.
After selecting the database file, you need to click on the Test Connection button to verify that your connection is working properly. If everything is OK, you will see a message saying \"Connection successful\". You can then click on the OK button to close the dialog box and save the database connection.
Design the Main Form and Add Controls
The next step is to design the main form of your application and add some controls that will allow you to interact with the database. You can do this by clicking on the Form menu and selecting Form Designer. You will see a blank form where you can drag and drop various controls from the Toolbox panel on the left side of the screen.
For this example, we will add the following controls to our form:
A Label control with the caption \"Customer Manager\" and font size 16
A Grid control that will display the customer data from the database
A GroupBox control with the caption \"Customer Details\" that will contain some TextBox controls for editing customer information
A Button control with the caption \"New\" that will allow you to add a new customer record
A Button control with the caption \"Save\" that will allow you to save changes to an existing customer record
A Button control with the caption \"Delete\" that will allow you to delete an existing customer record
A Button control with the caption \"Exit\" that will allow you to close the application
You can adjust the size and position of each control by using the mouse or the arrow keys. You can also change the properties of each control by using the Property Editor panel on the right side of the screen. For example, you can change the name, caption, font, color, alignment, etc. of each control.
Create a Query and Bind it to a Grid Control
The next step is to create a query that will retrieve the customer data from the database and bind it to the grid control on our form. You can do this by clicking on the Query menu and selecting Query Builder. You will see a dialog box where you can create SQL statements using a graphical interface.
For this example, we will create a simple query that selects all fields from the Customers table. You can do this by dragging and dropping the Customers table from the Database Explorer panel on the left side of the screen to the Query Designer panel on
the right side of the screen. You will see all fields from
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