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asp.net core qr code reader

asp.net core qr code reader

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Once a routine is written, tested, and, if necessary, debugged, it can finally be rolled out to production. The process of doing this is quite simple: the release version of the DLL is copied to the server, and a few T-SQL statements are executed. In order to produce a release version, change the build option on the Standard toolbar from Debug to Release, as shown in Figure 14-16. Once the configuration is set, click Build from the main toolbar, and then click Build Solution. This will produce a release version of the DLL a version with no debug symbols in the [Project Root]\bin\Release folder. So if the root folder for the project is C:\Projects\SalesCrossTabs, the DLL will be in C:\Projects\SalesCrossTabs\bin\Release.

Figure A-1. The Data tab in Expression Blend 4 allows you to manage and create data sources The Data tab provides the developer two key pieces of functionality. It allows the developer to create data sources from dynamic or live data sources. Furthermore, it allows the developer to explore and manage data sources defined in the application or in the selected document. On the right-hand side, you can see two database icons with plus signs. The one on the left is used to create a local sample data source. Figure A-2 shows the menu that appears when a user clicks the Create sample data source icon.

Figure 7-13. Local installation menu option in the Silverlight context menu Selecting this option opens an installation options dialog. Figure 7-14 shows a sample.

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Figure 14-16. Configuring the project for a release build The release version of the DLL can be copied from this location onto any production server in order to deploy it. Only the DLL is required to deploy the CLR routines compiled within it. The DLL is registered with SQL Server using the CREATE ASSEMBLY statement, which has the following syntax: CREATE ASSEMBLY assembly_name [ AUTHORIZATION owner_name ] FROM { <client_assembly_specifier> | <assembly_bits> [,...n] } [ WITH PERMISSION_SET = { SAFE | EXTERNAL_ACCESS | UNSAFE } ] [ ; ] The assembly_name represents a user-defined name for the assembly. Generally, it s best to use the name of the project. The AUTHORIZATION clause is optional and allows the DBA to specify a particular owner for the object. The important part of the FROM clause is the client_assembly_specifier, which is the physical path to the DLL file. The assembly_bits option is used for situations in which the DLL has been binary-serialized.

Figure A-2. Menu options available when creating a sample data source In the context menu that appears, you have two options: New Sample Data: This feature allows you to define sample data manually. Import Sample Data from XML: This feature allows you to take a well-defined XML file and import the data as a local data source. Create Sample Data from Class: This feature allows you to take a sample class with defined properties and create a sample data set from it

Figure 7-14. Installation options dialog for local installation of a Silverlight application Note the portions marked in bold in the dialog. The title provided in the application identity settings in the application manifest is used to identify the application, and the web URI (http://localhost in Figure 7-14, to indicate that the application is being delivered from the local web server) indicates the application s site of origin. The icon used in this dialog is the 128 x 128 pixel image provided in the application manifest. After the application is installed, you can launch it directly from either the Start menu icon or the desktop shortcut added during the installation process. To remove a locally installed application, you need to run the application, either locally or inbrowser by visiting the application web site, and bring up the Silverlight context menu. When the application is installed locally, the context menu offers an option to remove the application from your machine (see Figure 7-15).

The most important clause of CREATE ASSEMBLY, however, is the optional WITH PERMISSION_SET clause The DBA is in complete control when it comes to what CLR routines can do Routines can be assigned to one of three permission sets, each progressively less restrictive SAFE: The default SAFE permission set restricts routines from accessing any external resources, including files, web services, the registry, or networks EXTERNAL_ACCESS: The EXTERNAL_ACCESS permission set opens access to these external resources This can be useful for situations in which data from the database needs to be merged with data from other sources UNSAFE: The UNSAFE permission set opens access to all CLR libraries It is recommended that this permission set not be used, as there is potential for destabilization of the SQL Server process space if libraries are misused.

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