.net qr code reader Hybrid Thread Synchronization in .NET

Integration QR Code ISO/IEC18004 in .NET Hybrid Thread Synchronization

the database, we can already see some of the changes that have been made . Execute the following command:

The CLR doesn t actually work with modules, it works with assemblies . An assembly is an abstract concept that can be difficult to grasp initially . First, an assembly is a logical grouping of one or more modules or resource files . Second, an assembly is the smallest unit of reuse, security, and versioning . Depending on the choices you make with your compilers or tools, you can produce a single-file or a multifile assembly . In the CLR world, an assembly is what we would call a component . In 2, I ll go over assemblies in great detail, so I don t want to spend a lot of time on them here . All I want to do now is make you aware that there is this extra conceptual notion that offers a way to treat a group of files as a single entity . Figure 1-2 should help explain what assemblies are about . In this figure, some managed modules and resource (or data) files are being processed by a tool . This tool produces a single PE32(+) file that represents the logical grouping of files . What happens is that this PE32(+) file contains a block of data called the manifest . The manifest is simply another set of metadata tables . These tables describe the files that make up the assembly, the publicly exported types implemented by the files in the assembly, and the resource or data files that are associated with the assembly .

Run the following code in Connection 2 to read the data in a loop while Connection 1 is inserting data:

Thread.SetData(x_named_slot, "data"); Thread.SetData(x_unnamed_slot, "data");

SELECT YEAR(orderdate) AS orderyear, MONTH(orderdate) AS ordermonth, DAY(orderdate) AS orderday, SUM(qty) AS totalqty FROM dbo.Orders GROUP BY ROLLUP(YEAR(orderdate), MONTH(orderdate), DAY(orderdate)) ORDER BY GROUPING(YEAR(orderdate)) , YEAR(orderdate), GROUPING(MONTH(orderdate)), MONTH(orderdate), GROUPING(DAY(orderdate)) , DAY(orderdate);

Figure 2-8

ALTER PROC dbo.GetSortedShippers @colname AS sysname, @sortdir AS CHAR(1) = 'A' AS SELECT shipperid, companyname, phone FROM Sales.Shippers ORDER BY CASE WHEN @colname = N'shipperid' THEN shipperid END, CASE WHEN @colname = N'companyname' THEN companyname END, CASE WHEN @colname = N'phone' THEN phone END, CASE WHEN @colname = N'shipperid' THEN shipperid END DESC, CASE WHEN @colname = N'companyname' THEN companyname END DESC, CASE WHEN @colname = N'phone' THEN phone END DESC; GO

Note MARS-like behavior is available in the .NET Framework 2.0 versions of the OLE DB and Oracle managed providers. The Oracle provider doesn t support the MARS attribute on the connection string, but it enables the feature automatically. The OLE DB provider doesn t support the connection string attribute either it simulates multiple resultsets when you connect to earlier versions of SQL Server or when the MDAC 9.0 library is not available. When you operate through OLE DB on a version of SQL Server 2005 equipped with MDAC 9.0, multiple resultsets are active and are natively implemented.

The SIGN function returns 1 for a positive input, 0 an input of zero, 1 for a negative input, and NULL for a NULL input . The sgn column actually represents the sales trend of the current month . At this point, you want to group all consecutive months that have the same sales trend . To do so, you first need to calculate a grouping factor a value that identifies the group . One option for the grouping factor is the earliest future month in which the trend is different from the current month s trend . If you think about it, you can see that such a value will be the same for all consecutive months that have the same trend . Run the following code to create the SalesGrp view, which calculates the grouping factor:

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DECLARE @point1 GEOMETRY; DECLARE @point2 GEOMETRY; SET @point1 = (SELECT GEOM FROM Points WHERE NAME = 'Point1'); SET @point2 = (SELECT GEOM FROM Points WHERE NAME = 'Point2'); SELECT @point1.STUnion(@point2).STAsText() AS Well_Known_Text;