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(txtFirstName), and the other allows for a keyword search on the LastName column (txtLastName) Your code would then look like this: sqlQueryObjWhereAnd() sqlQueryObjWhereCreateKeywords(MetxtCustomerIDText, "CustomerID", _ ReportingSqlOperationAnd) sqlQueryObjWhereCreateKeywords(MetxtFirstNameText, "FirstName", _ ReportingSqlOperationAnd) sqlQueryObjWhereCreateKeywords(MetxtLastNameText, "LastName", _ ReportingSqlOperationAnd) Then let s say that your users come back to you and say they don t like tabbing through all the fields on the form, and they would prefer to just have one field for the keyword entry They still want it to search through the CustomerID, FirstName, and LastName fields, however You can do this by having a single text box named txtKeywords and running this code: sqlQueryObjWhereCreateKeywords(MetxtKeywordsText, _ "FirstName + ' ' + LastName + ' ' + CustomerID", _ ReportingSqlOperation.

And) Notice that the column specified in this code is really three columns that are concatenated together (with spaces placed in-between) When the SqlQuery object outputs the text to build the query, it places FirstName + ' ' + LastName + ' ' + CustomerID directly in the SQL query When SQL encounters this text, it concatenates the value of the columns together to produce a large string value that you can search all at once There are, of course, some performance considerations For the most part, you should not see many issues, but if you do, here are some things you may want to check As you use more and more CreateKeywords functions (as in the second example), your SQL query will become longer and longer and take longer and longer to process.

Generate a public and private key pair. Use verbose output. Specify the name of the key store. Add an alias for the key pair. Specify the validity period in days. Add a password for the key store. Add a password for the key.

If the bounded buffer gets filled up quickly, then there is extra overhead for managing the bounded buffer, which slows down performance. But AsyncAppender is quite effective in situations involving long blocking networks, I/O access, or less CPU-intensive operations.

Along the same lines, as you concatenate more and more columns together (as in the third example), your SQL query will have to process more and more text before it can search through it If you are experiencing issues, you may want to reduce the number of columns on which you are searching Also, the number of keywords specified has an impact on performance, so you may want to limit the number of keywords users may enter if you notice any performance issues..

Everyone has their own preferences when it comes to searches. Some people may want to see a simple search with only a few fields. Others may want to see an advanced search that allows for a more detailed query. Fortunately, you don t have to choose one over the other. You can let your users choose their preferred option by providing the ability to switch between a simple and an advanced search. The next few sections walk you through a simple architecture for switching out search forms. In the examples that follow, you ll see the implementation of a simple and advanced search form, both of which generate queries for the Employee table in the Northwind database. The basic idea behind this solution is that you want to create a generic interface that a search form can implement, then use that interface to allow different search forms to communicate with the actual search page. Because the actual search form is abstracted through the interface,

Tip When you run your applications in the emulator, the Eclipse workbench automatically signs the application

you can implement any type of search form you want and the page can still work with it. That means simple forms, advanced forms, or even different forms for different security levels. You are not just limited to simple and advanced forms under this architecture. There are a total of four components in this example. The ISearchControl interface defines a common set of search functionality for search forms. The SimpleForm.ascx and AdvancedForm.ascx are two search forms that implement the ISearchControl form and expose varying levels of searching functionality. And lastly, the EmployeeSearch.aspx page demonstrates how you can easily switch back and forth between search forms that implement the ISearchControl interface. All these components can be found in the 8 sample application in the Source Code area on the Apress website.