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Remember that the AT clause allows you to invoke pass-through code at a specified linked server . The pass-through code is in the target server s dialect, and the target server type is not limited to SQL Server . It can be any OLEDB or ODBC provider supported as a linked server . To demonstrate the use of EXEC AT against a non SQL Server provider, first Use Microsoft Access 2007 to create a blank Access database called Database1 in the folder C:\temp . Then, execute the following code, which creates and configures a linked server called AccessDatabase1 against the Access database you created: vb.net upc-a reader VB . NET UPC-A Barcode Reader SDK - Decode & Scan UPC-A ...
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Background. I originally built this application in VB . NET . While I was learning C#. ... To test this application, I bought a barcode scanner from Ebay for 5 dollars, ... latest set of problems in the form of an org.w3c.dom.Document. This information is then written to the file system and returned to the calling component. In this listing, we include only the method that communicates with the web service and performs the update. The rest of the source code for this bean including the home and remote interfaces is very standard. See listing 6.4. -- Create a linked server to an Access database EXEC sp_addlinkedserver @server = 'AccessDatabase1', @provider = 'Microsoft.ACE.OLEDB.12.0', @srvproduct = 'OLE DB Provider for ACE', @datasrc = 'C:\temp\Database1.accdb'; For security reasons, use the sp_droplinkedsrvlogin stored procedure to remove the default self-mapping added for all local logins . Use the sp_addlinkedsrvlogin stored procedure to map local logins to a security account on the remote server, like so: Click Start, point to All Programs, and then click MSN Messenger. The MSN Messenger window appears. word 2010 ean 128, birt barcode free, upc-a word font, birt ean 128, birt code 39, word data matrix code vb.net upc-a reader .NET Barcode Reader Library | C# & VB . NET UPC-A Recognition ...
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NET UPC-A Generator, Creating and Adding UPC-A in VB . NET , ASP.NET Web Forms and Windows Forms applications, with detailed Developer Guide. -- Remove default self-mapping added for all local logins EXEC sp_droplinkedsrvlogin 'AccessDatabase1', NULL; -- Add login mappings EXEC sp_addlinkedsrvlogin 'AccessDatabase1', 'false', '<specify_local_login_name_here>', Admin, NULL; GO Use the sp_serveroption stored procedure to allow remote procedure calls (RPCs) against the linked server, like so: public class BugAccessorBean implements SessionBean { ... /* * Based on the name of the machine that is passed in, * call the web service and update the bug list. */ public Document updateBugList( String name ) throws RemoteException { try { SAXBuilder sBuilder = new SAXBuilder(); Retrieves current list of detailed issues String fileName = name + ".xml"; Document bugDoc = sBuilder.build(new File("config/mydomain/applications/book/" + fileName)); Element root = bugDoc.getRootElement(); String lastUpdatedString = root.getChildText("last_updated"); -- Allow RPC out EXEC sp_serveroption 'AccessDatabase1', 'rpc out', true; XACT_STATE is a function that you invoke in the CATCH block to get the current transaction state . It returns 0 for no active transaction, 1 for active and committable, and 1 for active but uncommittable . To demonstrate the use of this function and how to determine the transaction state, I ll use the code in Listing 6-3 . vb.net upc-a reader UPC-A VB . NET DLL - Create UPC-A barcodes in VB . NET with valid ...
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RasterEdge . NET Image SDK contains a barcode reading plug-in library which can efficiently add UPC-A barcode scanning & detecting ability into your VB . BEGIN TRY BEGIN TRAN INSERT INTO dbo.Employees(empid, empname, mgrid) VALUES(3, 'Emp3', 1); /* other activity */ COMMIT TRAN PRINT 'Code completed successfully.'; END TRY BEGIN CATCH PRINT 'Error: ' + CAST(ERROR_NUMBER() AS VARCHAR(10)) + ' found.'; IF (XACT_STATE()) = -1 BEGIN PRINT 'Transaction is open but uncommittable.'; /* ...investigate data... */ ROLLBACK TRAN; -- can only ROLLBACK /* ...handle the error... */ END SimpleDateFormat formatter = new SimpleDateFormat("MM-dd-yy"); ParsePosition pos = new ParsePosition(0); Date lastUpdated = formatter.parse( lastUpdatedString, pos ); Date currentDate = new Date(); String today = formatter.format( currentDate ); Element dateElement = root.getChild("last_updated"); dateElement.setText( today ); ComponentLocator cl = ComponentLocator.getInstance(); CommonIssues webService = (CommonIssues) cl.getWebService( name ); org.w3c.dom.Document wsDoc = webService.getIssuesList("amaya"); ELSE IF (XACT_STATE()) = 1 BEGIN PRINT 'Transaction is open and committable.'; /* ...handle error... */ COMMIT TRAN; -- or ROLLBACK END ELSE BEGIN PRINT 'No open transaction.'; /* ...handle error... */ END END CATCH This code inserts a row for employee 3 into the Employees table using an explicit transaction in a TRY block . The CATCH block checks the transaction state before determining a course of action . The first time you run the code in Listing 6-3, there should be no errors, because it s a valid new employee . Run the code a second time, and you will get the following output: Because a primary key violation is not considered a severe error, it neither completely terminates nor fails the transaction . Rather, the transaction remains open and committable . To see an example where the transaction fails, you can simply set XACT_ABORT to ON, and rerun the code in Listing 6-3: DOMBuilder dBuilder = new DOMBuilder(); Document newIssueDoc = dBuilder.build( wsDoc ); Element docRoot = newIssueDoc.getRootElement(); Element newIssues = docRoot.getChild( "issues" ); newIssues.detach(); Replaces the old Element issues = root.getChild("issues"); root.removeContent( issues ); SET XACT_ABORT ON; -- run code in listing 10-3 SET XACT_ABORT OFF; This time, you get the following output: vb.net upc-a reader VB . NET UPC-A barcode Generator - ASP.NET Barcode Reader
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