By Amit Kalani
This certification examination measures your skill to advance and enforce XML internet providers and server parts utilizing visible C# and the Microsoft .NET Framework. This examination counts as a middle credits towards the hot MCAD (Microsoft qualified program Developer) certification in addition to a middle credits towards the recent MCSD .NET song. This ebook isn't meant to coach new fabric. as a substitute it assumes that you've a superior origin of information yet can use a refresher on very important suggestions in addition to a consultant to examination issues and pursuits. This booklet focuses precisely on what you must move the examination - it good points test-taking ideas, time-saving research assistance, and a unique Cram Sheet that comes with counsel, acronyms, and reminiscence joggers now not to be had at any place else. The sequence is supported on-line at numerous websites: examcram.com, informit.com, and cramsession.com.The accompanying CD positive aspects PrepLogic™ perform assessments, Preview version. This product contains one entire PrepLogic perform try out with nearly an identical variety of questions chanced on at the genuine seller examination. every one query includes complete, specific reasons of the proper and improper solutions. The engine bargains research modes, perform try and Flash evaluate, complete examination customization, and a close ranking record.
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Extra info for MCAD Developing XML Web Services and Server Components with Visual C# .NET and the .NET Framework Exam Cram 2 (Exam Cram 70-320)
2. Create a SqlCommand object to retrieve the desired data. 3. Assign the SqlCommand object to the SelectCommand property of a SqlDataAdapter object. 4. Call the Fill() method of the SqlDataAdapter object to retrieve data from the database and populate the DataSet object with the data. Here, you don't have to explicitly call the Open() and Close() methods of the SqlConnection object. Instead, the Fill() method makes those calls when it needs the data. Doing this not only cuts down on the amount of code you need to write, but also improves the scalability of your application by keeping the SqlConnection object open for the shortest possible period of time.
51 52 The DataRelation Class The DataRelation object stores information on the relationships between DataTable objects in a DataSet object. 7. 7. Important Members of the DataRelation Class Member Type Description ChildColumns Property Specifies a collection of DataColumn objects that defines the foreign key side of the relationship ChildKeyConstraint Property Returns a ForeignKeyConstraint object for the relationship ChildTable Property Specifies a DataTable object from the foreign key side of the relationship DataSet Property Retrieves the DataSet object to which the DataRelation object belongs ParentColumns Property Specifies a collection of DataColumn objects that defines the primary key side of the relationship ParentKeyConstraint Property Returns a PrimaryKeyConstraint object for the relationship ParentTable Property Specifies a DataTable object from the primary key side of the relationship 52 53 RelationName Property Specifies the name of the DataRelation object The DataRow Class A DataRow object represents a single row of data.
You don't have to worry about which rows or columns of data are changed because the SqlDataAdapter object automatically locates the changed rows. It then executes the SqlCommand object specified in its UpdateCommand property for each of those rows. If you set the SelectCommand property of the SqlDataAdapter, a SqlCommandBuilder object can automatically generate INSERT, UPDATE, and DELETE commands for single-table updates. You use this technique when you want to write minimum code. However, automatic generation of commands also requires extra trips to the server to get the schema information.