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Listing 9-13. PaginationForms\PagingControl.ascx.vb (Web Project) Imports Reporting Partial Class PagingControl Inherits System.Web.UI.UserControl Implements IPaginationControl 'IPaginationControl Events '*************************************************************************** Public Event NewPageRequested(ByVal page As Integer) _ Implements IPaginationControl.NewPageRequested Public Event NextPageRequested() _ Implements IPaginationControl.NextPageRequested Public Event PrevPageRequested() _ Implements IPaginationControl.PrevPageRequested '*************************************************************************** Public Sub SetInfo(ByVal currentPage As Integer, ByVal totalPages As Integer, _ ByVal totalRecords As Integer, ByVal itemsPerPage As Integer, _ ByVal recordStart as Integer, ByVal recordEnd as Integer) _ Implements IPaginationControl.SetInfo 'Set up current page, total page, and record display labels Me.lblPageTotal.Text = totalPages.ToString Me.txtCurrentPage.Text = currentPage.ToString Me.lblRecordInfo.Text = String.Format( _ "Displaying {0}-{1} of {2} Total Items", _ recordStart, recordEnd, totalRecords) 'Set up validation for jumping to another page rngPageNumber.MinimumValue = "1" rngPageNumber.MaximumValue = totalPages.ToString 'Disable If currentPage = totalPages Then Me.lnkNext.Enabled = False If currentPage = 1 Then Me.lnkPrev.Enabled = False If totalPages = 1 Then Me.lnkGotoPage.Enabled = False End Sub '*************************************************************************** Protected Sub lnkPrev_Click(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles lnkPrev.Click RaiseEvent PrevPageRequested() End Sub

Finally, if you wish to write a command-line tool to run in the device, you must do so statically. Consider the simple program in Listing 2-10 to print the command-line arguments to stdout. Listing 2-10. Simple Command-Line Program #include <stdio.h> int main(int argc, char **argv) { int i; for ( i = 0 ; i < argc ; i++ ) { printf("Main argv[%d]=%s\n", i, argv[i]); } printf("Hello World\n"); exit( 0); } If you compile the program with -static using the helper scripts, you get the following error:

'*************************************************************************** Protected Sub lnkNext_Click(ByVal sender As Object, _ ByVal e As SystemEventArgs) Handles lnkNextClick RaiseEvent NextPageRequested() End Sub '*************************************************************************** Protected Sub lnkGotoPage_Click(ByVal sender As Object, _ ByVal e As SystemEventArgs) Handles lnkGotoPageClick If Not IsNumeric(MetxtCurrentPageText) Then Exit Sub RaiseEvent NewPageRequested(CInt(MetxtCurrentPageText)) End Sub End Class The PagingControl class inherits from SystemWebUserControl because it is a UserControl, and it implements the IPaginationControl interface Remember, three events and one method make up the IPaginationControl interface The events for the interface are defined immediately after the class definition; there is no code involved with the definition of the events After the reporting framework loads the paging navigation component, it passes in important initialization data to the component s SetInfo method You can see from the code listing above that the SetInfo method for this component uses this data to accomplish three things.

A more complex configuration can attach multiple appenders to a particular logger. Each appender, in turn, can have a different layout, and that layout can have a conversion pattern associated with it. Listing 2-2 is an example of a more complex configuration file. Listing 2-2. Complex log4j Configuration File # define the root logger with two appenders writing to console and file log4j.rootLogger = DEBUG, CONSOLE, FILE #define your own logger named com.foo #and assign level and appender to your own logger log4j.logger.com.foo=DEBUG,FILE #define the appender named FILE log4j.appender.FILE=org.apache.log4j.FileAppender log4j.appender.FILE.File=${user.home}/log.out

First, it displays the information so the user can see the current page, total pages, and record count information Second, it sets up validation for the txtCurrentPage text box This ensures that users can only attempt to jump to valid pages Lastly, it disables the lnkPrev control when the first page is being displayed, disables the lnkNext control when the last page is being displayed, and disables the Go link if there is only one page Like the validation on txtCurrentPage, this ensures users cannot request pages that do not exist Below the SetInfo method, the PagingControl contains a series of methods that handles the click events of the lnkPrev, lnkNext, and lnkGotoPage controls When clicked, each one of these buttons raises one of the IPaginationControl events So, lnkPrev causes the PrevPageRequested event to fire, lnkNext causes the NextPageRequested event to fire, and lnkGotoPage causes the NewPageRequested event to fire.