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Enables a full-text filter described by an @FullTextFilterDef annotation. The FullTextFilter object lets you set the necessary parameters for the filter. More than one filter can be activated. Disables a full-text filter described by an @FullTextFilterDef annotation. Returns the total number of matching results regardless of pagination. Returns the Explanation object for a given document id in a query. The document id is not the entity id.

Obviously, using command builders is preferable to manually coding SQL; however, remember that they work only on single tables and that the underlying database table must have a primary or unique key. Also, the data adapter SelectCommand property must have a query that includes the key columns.

disableFullTextFilter(String)

Catch ex As System.Data.SqlClient.SqlException Dim str As String = "Source: " & ex.Source str &= ControlChars.NewLine str str str str str str str str str str str &= &= &= &= &= &= &= &= &= &= &= "Number: " & ex.Number.ToString() ControlChars.NewLine "Message: " & ex.Message ControlChars.NewLine "Class: " & ex.Class.ToString() ControlChars.NewLine "Procedure: " & ex.Procedure.ToString() ControlChars.NewLine "Line Number: " & ex.LineNumber.ToString() ControlChars.NewLine "Server: " & ex.Server.ToString()

int getResultSize()

MessageBox.Show(str, "Database Exception")

s Note Though all five of the data providers in the .NET Framework Class Library have command builder

Explanation explain(int)

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Now let s see what happens when a statement in a stored procedure encounters an error. You ll create a stored procedure that attempts an illegal INSERT, and then you ll extract information from the SqlException object. 1. Using SSMSE, create a stored procedure named sp_DbException_2, as follows:

Method Description Returns the ReaderProvider used. Allows opening and closing of IndexReaders. Returns the list of directory providers associated with a given class (one unless sharding is used). Allows you to use Lucene natively. Optimizes all indexes. Optimizes Lucene indexes associated with the class passed as a parameter. Returns an analyzer by its @AnalyzerDef name. Useful when the analyzer used for indexing should not be used at query time. This is a rare case. Returns the scoped analyzer used to index a given entity. In most cases, uses the same analyzer to execute your queries. Reference Listing 11.6

ReaderProvider getReaderProvider() DirectoryProvider[] getDirectoryProviders(Class);

classes, no class or interface exists in the System.Data namespace that defines them. So, if you want to learn more about command builders, the best place to start is the description for the builder in which you re interested. The System.Data.DataSet class and the System.Data.IDataAdapter interface define the underlying components that command builders interact with, and their documentation provides the informal specification for the constraints on command builders.

create procedure sp_DbException_2 as set nocount on insert into employees ( employeeid, firstname ) values (50, 'Cinderella')

optimize() optimize(Class)

Listing 13-5. Button4_Click()

Analyzer getAnalyzer(String)

You ve seen that updating a database with datasets and data adapters is relatively straightforward However, we ve oversimplified things; you ve been assuming that no other changes have been made to the database while you ve been working with disconnected datasets Imagine two separate users trying to make conflicting changes to the same row in a dataset and then trying to propagate these changes to the database What happens How does the database resolve the conflicts Which row gets updated first, or second, or at all The answer is unclear As with so many real-world database issues, it all depends on a variety of factors However, ADONET provides a fundamental level of concurrency control that s designed to prevent update anomalies The details are beyond the scope of this book, but the following is a good conceptual start Basically, a dataset marks all added, modified, and deleted rows.

' Create connection Dim conn As SqlConnection = New SqlConnection( _ "server = .\sqlexpress;" _ & "integrated security = true;" _ & "database = northwind" _ ) ' Create command Dim cmd As SqlCommand = conn.CreateCommand() ' Specify that a stored procedure is to be executed cmd.CommandType = CommandType.StoredProcedure cmd.CommandText = "sp_DbException_2" Try ' Open connection conn.Open()

Analyzer getAnalyzer(Class)

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