Home > Articles > Programming > Windows Programming

  • Print
  • + Share This
This chapter is from the book

Simple Data Binding in Windows Forms

Let's quickly step through an example that will display a Customer ID, Company Name, and Contact Name from the Customer table in the Northwind database supplied in Microsoft SQL Server. More specifically, you will be creating a few TextBox controls on a form and binding the Text property on these TextBox controls to the Customers data source. Then, you will create a button that will activate the data retrieval and display the data to the form. This is simple binding.

Create a New Project in VS .NET

  1. Create a new project in VS .NET by choosing File, New, and then choosing the Project option.

  2. When the New Project dialog box appears, choose Visual Basic Projects (or Visual C# Projects) and Windows Applications. Name this project "ADO.NET24hoursDB." This creates a default form for you to start from.

Add the Data Connection, Data Adapter, and DataSet

We will be accessing the Customers table in SQL Server's Northwind database. So, first we will need to create a data connection and a data adapter to Microsoft SQL Server.

  1. From the Data tab of the Toolbox, drag a SQLDataAdapter object into your form as shown in Figure 9.1 (or OleDBDataAdapter if you want).

  2. This will automatically invoke the Data Adapter Configuration Wizard. Both the data connection and the data adapter can be fully configured here.

    1. The wizard starts with the Choose Your Data Connection dialog box. If you already have a connection defined in your project, it will be placed in the dialog box. Otherwise, choose to create a new connection and specify the appropriate connection information (test the connection as well).

    2. Figure 9.1 Visual Studio .NET Form with Data Toolbox SqlDataAdapter object selected.

    3. You will then have to decide to supply SQL statements, build a new stored procedure, or give the name of an existing stored procedure for the data access. In our example we will use the Use SQL Statements option.

    4. You will be presented with a Generate the SQL Statements dialog box where you will simply type in a valid SQL statement, or you can use the Query Builder option to formulate the SQL query. For our example, just type in the following query:

    5. SELECT * FROM Customers
    6. The wizard will show you the tasks that it has done and indicate whether the SqlDataAdapter has been configured successfully.

  3. After the SqlDataAdapter and DataConnection objects have been configured and added to the form, you must generate a DataSet and then add an instance of this DataSet to the form. We will be binding our TextBox properties to the columns in the DataSet.

    1. Simply right-click on the SqlDataAdapter (SqlDataAdapter1) that is on your form and choose the Generate Dataset menu option as seen in Figure 9.2.

    2. Now, just choose to create a new DataSet using the default name that it provides (DataSet1). Make sure you have checked the Customers table and checked the box for it to be added to the designer.

    3. Figure 9.2 Generate a new dataset for the form.

    4. When the process finishes, a DataSet instance named DataSet11 will be on the form and a dataset schema will be in the Solutions Explorer (named DataSet1.xsd).

Create Text Boxes, Labels, and Buttons

The next step is to complete the form example to include a few text boxes and a control button. From the Windows Forms tab of the Toolbox, add the following (drag and drop on the form):

  • Textbox—With a name of txtCustomerID and text is blank.

  • Textbox—With a name of txtCompanyName and text is blank.

  • Textbox—With a name of txtContactName and text is blank.

  • Button—With a name of btnGetCustomer and text of "Get Customer".

Go ahead and add labels in front of each text box so that it looks like the form in Figure 9.3.

Add Code to Populate the DataSet

Now we are ready to complete the application by adding the code to fill the DataSet.

Just double-click on the Get Customer button to create a method for the Click event. You will have to add code to make a call to the DataSet's Clear method to clear the DataSet out between iterations, and make a call to the data adapter's Fill method to get data from the database (as you can see in Figure 9.4). The following code is added:

Customers1.Clear()
SqlDataAdapter1.Fill(Customers1)

Figure 9.3 Add text boxes, button, and labels to the form.

Figure 9.4 Adding code for the Button method.

Bind the Text Boxes to the DataSet

Nothing is left to do other than bind (simple binding) the text boxes to the columns in the DataSet and run the application.

  1. From the Forms Designer, select the txtCustomerID text box and press F4. This will position you to the properties window for this text box.

  2. Expand the (DataBindings) node in the properties list and its text property.

  3. Within the text property, expand DataSet1 and Customers nodes and select the CustomerID column from the list (look back at Figure 9.3 in the lower right corner to see the (DataBinding) property).

  4. Now, from the Forms Designer, select the txtCompanyName text box and press F4.

  5. Expand the (DataBindings) node in the properties list and its text property.

  6. Within the text property, expand the DataSet1 and Customers nodes and select the CompanyName column from the list.

  7. Finally, from the Forms Designer, select the txtContactName text box and press F4.

  8. Expand the (DataBindings) node in the properties list and its text property.

  9. Within the text property, expand the DataSet1 and Customers nodes and select the ContactName column from the list.

Test It!

That's it! Now just hit the F5 key and test your application by clicking on the Get Customer button. It will put the first customer's information (CustomerID, CompanyName, and ContactName) that it finds in the DataSet into the appropriate text boxes. In Figure 9.5, you can see the form displaying a customer's information successfully.

Figure 9.5 The Get Customer Forms application, showing simple binding.

The following snippet of code is from the forms1.vb program for this example and shows the explicit data binding for each text box. When you are using the Forms Designer, much of this code is generated for you (as you specify the data binding properties):

Me.txtCustomerID.DataBindings.Add(New System.Windows.Forms.Binding
("Text", Me.DataSet11, "Customers.CustomerID"))
Me.txtCompanyName.DataBindings.Add(New System.Windows.Forms.Binding
("Text", Me.DataSet11, "Customers.CompanyName"))
Me.txtContactName.DataBindings.Add(New System.Windows.Forms.Binding
("Text", Me.DataSet11, "Customers.ContactName"))

List Controls and DataGrid Controls

These are the key properties for list controls and DataGrid controls:

  • DataSource—An object that must implement the Ilist interface such as a DataSet or an array

  • IList inherits from

    • Icollection—A set of objects of similar type

    • Ienumerable—Provides an enumerator, which allows you to traverse a collection one item at a time (via the MoveNext() method).

  • DisplayMember/DataMember—allows you to specify a table or elements within a table.

Note: The classes and interfaces in the System.Web.UI.WebControls namespace are similar and equivalent.

  • + Share This
  • 🔖 Save To Your Account

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.

Overview


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information


To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.

Surveys

Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.

Newsletters

If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information


Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.

Security


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children


This site is not directed to children under the age of 13.

Marketing


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information


If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.

Choice/Opt-out


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information


Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents


California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure


Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.

Links


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact


Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice


We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020