1 Databound Controls. 2 Objectives You will be able to use design time data binding to display and...
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Transcript of 1 Databound Controls. 2 Objectives You will be able to use design time data binding to display and...
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Databound Controls
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Objectives
You will be able to use design time data binding to display and update SQL Server database data without writing any C# code.
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References
Beginning Visual C# 2005 Karli Watson, et al. Wrox Press, 2006
Chapter 25
Unchanged in Visual C# 2008
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Northwind Traders Database
Add the Northwind Traders database tables to your database on scorpius.
Download SQL script to build tables: http://www.cse.usf.edu/~turnerr/Software_Systems_Develo
pment/Downloads/ File add_northwind_tables.sql
Open a command prompt window and run sqlcmd to execute the script.
See next slide.
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Execute the Script
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Check Tables in Server Explorer
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High Level Components
Data Source Encapsulates Connection and
Command objects.
Databound Textbox Automatic updates both directions
DataGridView Display entire table in grid format Automatic updates both directions
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ProductData Application
We will create a new version of the Northwind Product Browser using high level components. SQL Data Source Databound Textboxes Databound DataGridView
No C# code!
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ProductData Application
Create a new C# Windows Forms Application.
Name: ProductData
Set form1 text property to Product Data DO NOT rename form1
On the following slides we will: Add a DataSource to the form.
Configure to access Products table. Add databound textboxes for data.
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ProductData Application
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Form1
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Add a Data SourceOn the Data menu, select Add New Data Source.
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Data Source Configuration Wizard
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Data Source Configuration Wizard
Select connection to your SQL Server database.
Or create a new connection if necessary.
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Data Source Configuration Wizard
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Data Source Configuration Wizard
Expand Tables, then Products. Select columns. Click Finish.
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DataSet in Solution Explorer
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Show Data Sources
To add databound controls to the form, select Show Data Sources on the Data menu
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Show Data Sources
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Adding a DataSet to the Program
Expand Products. Drag ProductName to design surface.
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Adding a DataSet to the Program
Build and run.
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App Running
Note navigation controls.
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Add Data to Form
Drag other columns to the design surface.
Arrange and resize labels and textboxes.
Build and run
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Add Data to Form
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App Running
End of Section
Note that you can update the data and save it back to the database.
Click the floppy disk icon to save.
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Using a DataGridView
The DataGridView allows us to display an entire table as a grid.
DataBinding permits all work to be done at design time. No C# code required!
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Using a DataGridView
Create a new project called Product_Grid
Set form1 Text property to Northwind Products.
DO NOT rename form1.
Add a data source as before. Same configuration.
Show Data Sources.
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Using a DataGridView
Drag the Products Table to the design surface.
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Using a DataGridView
Resize the form and the data grid.
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Using a DataGridView
Anchor the data grid on all four sides. Build and run.
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Products_Datagrid Running
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Update
Note that we can update data shown on the grid.
Clicking the “Save” icon will update the database.
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Summary
Databound Controls permit us to create an data driven application with zero code. Just configure high level components.
Internally these controls use the low level ADO classes that we saw previously.