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final HTML based on the declarative markup and the behavior expressed as code inside standard HTML <script> blocks or in code-behind files. Listing 14-2 shows a simple web form that uses the server to compute the current time and allows the user to refresh the page. Listing 14-3 (later in this chapter) shows an ASP.NET web.config website configuration file suitable for use with all the examples in this chapter. Listing 14-2. Time.aspx: A Simple ASP.NET Web Form with an Embedded F# Server-Side Script <%@ Page Language="F#" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script language="F#" runat="server"> /// F# scripts embedded in ASPX pages must be a set of 'member' declarations. /// ASP.NET inserts these into the code generated for the page object type. /// This member is invoked on the server when the page is loaded. It tests /// whether the page was loaded for the first time and updates the content of /// this.Time control. member this.Form1_Load(sender: obj, e: EventArgs) = if not this.Page.IsPostBack then this.Time.Text <- DateTime.Now.ToString() /// This member is invoked on the server when the Reload button is clicked. member this.Reload_Click(sender: obj, e: EventArgs) = this.Time.Text <- "(R) " + DateTime.Now.ToString() </script> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>Current time</title> <style type="text/css"> body { font-family:calibri,verdana,sans-serif; } </style> </head> <body> <form id="Form1" runat="server" OnLoad="Form1_Load"> The current time is: <asp:Label runat="server" id="Time" /> <asp:Button runat="server" id="Reload" text="Reload" OnClick="Reload_Click" /> </form> </body> </html>

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Ideally, you could create the parameters yourself on the first request (avoiding the extra round trip) and then cache the definition yourself for use on subsequent requests (avoiding the overhead of re-instantiating the collection of parameter objects with each request) Unfortunately, the parameter cache is not publicly exposed by the data access block, and so this would be a manual coding effort The parameter cache method is still good for late binding type of operations, where you don t know the footprint of the procedure you re calling in advance and therefore cannot possibly write code to create the parameter collection In this situation, consumers of your data access layer could simply pass a list of values, and you would pass that list along to the command wrapper factory, and the appropriate parameter collection would be created using metadata public DataSet ExecuteProcedure(string ProcedureCall) { Database db = DatabaseFactory.

finally { JDBCUtil.close( pstmt ); } } }

Listing 14-3. You should check that the version number (we used 1.9.2.9 in the listing) matches the one reported by F# Interactive and that the other information matches what is used in the ASP.NET samples in your F# distribution.

Previously, we manually created the wrapper method corresponding to the method get_address() of the object type address. In this section, we ll look at how to do this automatically using JPublisher. To generate the wrapper method automatically, the only change we need to make is to modify the option methods=none to methods=all in prop_address.txt. This results in a new prop_address.txt file, the contents of which are as follows:. jpub.user=benchmark/benchmark jpub.methods=all jpub.builtintypes=jdbc jpub.numbertypes=objectjdbc jpub.usertypes=jdbc jpub.package=book.ch08.jpub jpub.input=input_address.txt For clarity, we specify the class names to be AddressAuto and MyAddressAuto in the file input_address.txt, which now looks as follows. input_address.txt results in two classes: a parent class called AddressAuto and a child class MyAddressAuto. SQL ADDRESS GENERATE AddressAuto AS MyAddressAuto The relevant portions of the generated parent class file AddressAuto.java (partially edited for clarity) are as follows: /*@lineinfo:filename=AddressAuto*//*@lineinfo:user-code*//*@lineinfo:1^1*/ package book.ch10.jpub; /* Some other imports deleted for clarity */ import oracle.jpub.runtime.MutableStruct; import sqlj.runtime.ref.DefaultContext; import sqlj.runtime.ConnectionContext; public class AddressAuto implements SQLData { public static final String _SQL_NAME = "BENCHMARK.ADDRESS"; public static final int _SQL_TYPECODE = OracleTypes.STRUCT; /* connection management */ protected DefaultContext __tx = null; protected Connection __onn = null;

CreateDatabase(); string SprocName; string ParamList; int iPos = ProcedureCallIndexOf(" "); SprocName = ProcedureCallSubstring(0, iPos); ParamList = ProcedureCallSubstring(iPos + 1)Replace(" ", ""); DBCommandWrapper cw = dbGetStoredProcCommandWrapper (SprocName, ParamListSplit(","ToCharArray())); return dbExecuteDataSet(cw); } Now stored procedures can be executed like the slackers used to do it with ADO! void Page_Load(object sender, EventArgs e) { GridView gv = new GridView(); gvDataSource = ExecuteProcedure("usp_SortAuthors au_fname"); gvDataBind(); thisform1ControlsAdd(gv);.

Let s take a closer look at Listing 14-2. ASP.NET files can initially look like a sea of strange symbols. Table 14-3 shows the meanings of some of the symbolic forms you ll see in ASP.NET files.

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