By Mahesh Chand
A Programmer's advisor to ADO.NET in C# starts via taking readers via a fast moving evaluation of C# after which delves into ADO.NET. Why may still C# programmers use it rather than the prevailing applied sciences? What new performance does it provide? The chapters that keep on with battle through the main points on all of the significant information services of the .NET platform (OleDb, SQL Server, and ODBC) that show you how to learn and write facts to the distinct database. those chapters additionally function an excellent reference for having a look up certain tools and homes for those information supplier sessions. Authors Chand and Gold additionally express C# programmers the right way to paintings with XML sessions and the way to combine XML into the ADO.NET architecture.
The e-book offers programmers with convenient principles approximately making the most of the VS.NET IDE and the way you could tie your information to the myriad of strong controls together with the multi-faceted info Grid. ultimately, it is going via making a visitor ebook program for the net so that you can see how everything healthy jointly.
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A dataset’s Properties window showing a typed dataset Every dataset generated by the IDE creates an XML schema for the dataset. Figure 4-47 provides you with two hyperlinks at the bottom of the dialog: View Schema and DataSet Properties. View Schema lets you view the DataSet schema, and the DataSet Properties hyperlink lets you set the DataSet properties. By following these links you can set the DataSet’s column names and other properties (see Figure 4-48). NET Figure 4-48. xsd). The Class View of the DataSet is a derived class and looks like Figure 4-49.
Creating a Windows Application project Step 2: Adding a Data Form Wizard Item Now add a Data Form Wizard by selecting Project ➢ Add New Item ➢ Data Form Wizard from the available templates. You can type the name of your DataForm class in the Name field of the dialog box (see Figure 4-57). 209 933ch4 3/20/02 11:03 AM Page 210 Chapter 4 Figure 4-57. Using the Data Form Wizard Now click Open, which calls the Data Form Wizard. Step 3: Walking through the Data Form Wizard The first page of the wizard is a welcome page telling you what the wizard is about to do (see Figure 4-58).
Building columns in the query Now, I’ll select three columns from the Employees table. The result looks like Figure 4-25. Figure 4-25. NET NOTE You can even write your own SQL statement if you don’t want to use the Query Builder. For performance reasons, if you only want a few columns, then use column names instead of using SELECT * statements. View Wizard Results The View Wizard Results page shows you the action being taken by the wizard; in this example, it was successful. The Details section shows that the wizard has generated SQL Select, Insert, Update, and Delete statements and mappings (see Figure 4-26).