distinguishing barcode scanners from the keyboard in winforms

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DECLARE @a AS NVARCHAR(4000); DECLARE @i AS INT; SET @i = 1; WHILE @i <= 1000000 BEGIN SET @a = dbo.ExpCast(N'123456'); SET @i = @i + 1; END

You can solve this puzzle in many ways. I provided this puzzle not because it is tough but rather the contrary it is pretty simple. However, some of the solutions are simply beautiful. I ll rst provide an ordinary solution and then a more creative one. To explain the rst solution, examine the drawing in Figure A-4.

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="Build"> <PropertyGroup> <SourceRoot>$(MSBuildProjectDirectory)\</SourceRoot> <GenericBuildRoot>$(SourceRoot)BUILD\GenericBuild\</GenericBuildRoot> <ContribRoot>$(GenericBuildRoot)Contrib\</ContribRoot> <FxCopOutputRoot>$(SourceRoot)__BuildTemp\FxCopTemp\</FxCopOutputRoot> <Configuration>Debug</Configuration> </PropertyGroup> <PropertyGroup> <_TaskOutputRoot>$(SourceRoot)Examples.Tasks\</_TaskOutputRoot> <_LoggerOutputRoot>$(SourceRoot)Examples.Loggers\</_LoggerOutputRoot> </PropertyGroup>

Define the functional and formatting properties of the control Define the general properties of the control as a graphics object (I've already explained how to define these in relation to Figure 7-12 . The following discussion is therefore limited to the definition of functional and formatting properties) .

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The GridView control doesn t have methods other than the well-known DataBind method. As mentioned, though, in many situations you don t need to call methods on the GridView control. The data binding process is started implicitly when you bind a data source control with a data-bound control such as the GridView. In ASP.NET 2.0, many controls, and the Page class itself, feature pairs of events of the type doing/done. Key operations in the control life cycle are wrapped by a pair of events one firing before the operation takes place and one firing immediately after the operation is completed. The GridView class is no exception. The list of events is shown in Table 7-7.

If any errors occur while resolving a type reference file can t be found, file can t be loaded, hash mismatch, and so on an appropriate exception is thrown . Note If you want, your code can register callback methods with System.AppDomain s

-- Test GetEnvInfo stored procedure EXEC dbo.GetEnvInfo; GO ---------------------------------------------------------------------- Stored Procedure: GetAssemblyInfo ---------------------------------------------------------------------- Create GetAssemblyInfo stored procedure CREATE PROCEDURE GetAssemblyInfo @asmName AS sysname AS EXTERNAL NAME CLRUtilities.CLRUtilities.GetAssemblyInfo; GO -- Test GetAssemblyInfo stored procedure EXEC GetAssemblyInfo N'CLRUtilities'; GO ---------------------------------------------------------------------- Trigger: trg_GenericDMLAudit --------------------------------------------------------------------IF OBJECT_ID('dbo.T1', 'U') IS NOT NULL DROP TABLE dbo.T1; CREATE TABLE dbo.T1 ( keycol INT NOT NULL PRIMARY KEY, datacol VARCHAR(10) NOT NULL ); GO -- Database option TRUSTWORTHY needs to be ON for EXTERNAL_ACCESS ALTER DATABASE CLRUtilities SET TRUSTWORTHY ON; GO -- Alter assembly with PERMISSION_SET = EXTERNAL_ACCESS ALTER ASSEMBLY CLRUtilities WITH PERMISSION_SET = EXTERNAL_ACCESS; GO /* -- Safer alternative: -- Create an asymmetric key from the signed assembly -- Note: you have to sign the assembly using a strong name key file USE master; GO CREATE ASYMMETRIC KEY CLRUtilitiesKey FROM EXECUTABLE FILE = 'C:\CLRUtilities\CLRUtilities\bin\Debug\CLRUtilities.dll'; -- Create login and grant it with external access permission level CREATE LOGIN CLRUtilitiesLogin FROM ASYMMETRIC KEY CLRUtilitiesKey; GRANT EXTERNAL ACCESS ASSEMBLY TO CLRUtilitiesLogin; GO */

The first two steps of the following sequence are already performed by the Ipconfig /all command and Netdiag. (Network Diagnostics automatically performs only the second step. If Network Diagnostics reports that this self-ping test has failed, you can perform the first step manually.)

Figure 9-40

BEGIN TRAN INSERT INTO dbo.T1(keycol, col1, col2) VALUES(4, 101, 'C'); INSERT INTO dbo.T2(keycol, col1, col2) VALUES(4, 201, 'X'); COMMIT TRAN

As soon as ASP NET 1 0 was released, it offered a huge improvement over classic ASP by introducing well-defined code processing modules that together form the ASPNET HTTP pipeline Classic ASP was patched together from several disparate components (IIS, the Web Application Manager, and the ASP ISAPI DLL) The Request and Response objects were COM objects hanging off the threads owned by IIS If you wanted to do any processing outside the context of ASP, you needed to write an ISAPI filter If you wanted to write code to execute during processing, it had to occur within a COM object implementing IDispatch (severely limiting the available types of data you could use and negatively affecting performance) If you wanted to write any request-handling code (outside the context of ASP), you had to write a separate ISAPI DLL The ASP .

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