Activity 3: Generating a master-detail form in Visual Basic .NET

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Activity 3: Generating a master-detail form
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We can now use the Data Form Wizard to create a table for accessing the set of Publishers and the books they publish
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Figure A122
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Starting the Data Form Wizard
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Figure A123
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creating a new DataSet
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Select Project/Add Windows Form from the menus, choose Data Form Wizard, and enter the name frmPublishersvb in the Name: box Click on Open The process is shown in Figure A122 2 The Data Form Wizard s welcome page will appear, and from here you will be directed through the various stages to specify the data you want the form to access Press Next 3 In the rst page, you are given the options to create a new dataset or to select an existing one The option to select an existing one will be disabled since your project does not yet contain a dataset Enter a suitable name for the dataset (PublisherTitles will be an accurate description), being careful not to have any spaces in the name Press Next This is shown in Figure A123
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On the next page, you can select from existing connections (as you add new connections, they will be added to this list so that they can be reused) or press the New Connection button to create a new database connection Press New Connection and the dialog box in Figure A124 will appear:
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Figure A124
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The New Connection dialog box
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The New Connection dialog box will open at the second page ready for you to select a server (it has assumed you are using SQL Server) If you are using a version of SQL Server, press the Refresh button, pull down the combo box list to the left of it and then choose SQL Server If you are not, go to Step 9 6 You can choose either Windows NT Integrated Security or to use a speci c user name and password from the combo boxes below the server name The rst option will then use your Windows NT login to authenticate access to the database (which is the most secure option), the second will expect to nd the user name and password provided speci ed in the connection string For this simple demo, either will do 7 Select the Biblio database from the Select the database on the server combo box this could be called Biblio, Biblio2000, Biblio2002 or another, similar name for a later version 8 Finally, press Test Connection A message box should appear indicating the success of the connection Now go on to Step 13 9 If you are using an Access copy of Biblio, press the Provider tab at the top, left of the dialog box When the list of providers appears, choose the Microsoft Jet 40 OLE DB Provider (this is the most up to date version for Access databases on my system you may have a later version) and press Next This is shown in Figure A125
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Figure A125
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Choosing the Access (JET) Provider
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Figure A126
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Specifying the location of the Access database le
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In the Connection page, press the Ellipsis ( ) button to the right of the database name box and browse to the folder you found in Activity 1 as the location of the Biblio database le, and select the le Press Open Leave the user name as Admin and leave the Blank password box checked (see Figure A126)
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Figure A127
Selecting database tables
Figure A128
Creating the relationship between tables
Finally, press Test Connection to check that everything is ok with the database connection A Success message should appear 13 Press Next to step on to the page for selecting database tables In this box, select both the Publishers and Titles tables, pressing the > button after each selection (see Figure A127) 14 Step on to the next page by pressing Next This page allows you to set up a relationship between the tables selected Enter a name for the relationship (PublisherTitles), select the Parent table (Publishers) and the Child table (Titles), and select matching key elds in the top two boxes of Keys (PubID for both) This is shown in Figure A128