NET Core. Mobile apps with Xamarin. Microservices with Docker Containers. Modernizing existing. NET apps to the cloud. Tracing in ASP. July 16th, Code Snippet. Diagnostics model System. ControllerName, Model. ActionName, Model. Message ; if Model. Error: Trace. TraceError message ; break ; case TraceLevel. Warning: Trace. TraceWarning message ; break ; case TraceLevel. Info: Trace. TraceInformation message ; break ; case TraceLevel.
NET Trace viewer Trace. NET Framework trace output typically a console window. To make it easier to track how the Web forms interact with business objects and other components, you can integrate ASP. NET tracing output with System. Diagnostics tracing to route all tracing messages to one of these outputs. Common scenarios that use both ASP. NET tracing and the Trace class include Web pages that use middle-tier business objects to interact with data and business rules and pages that use enterprise services, such as transactions and queues.
In these situations, the business and enterprise components play key parts in the successful execution of the page and monitoring the execution flow of the pages across the multiple tiers of your application using a single tracing output is desirable. In this walkthrough you will work with tracing. You will modify a Web page and a business object to write trace messages, and then route all messages to one tracing output.
Creating a custom business component that can return data to a Web page. The component reads data from an XML file. Writing Trace messages in a custom business object. This walkthrough does not assume that you are using a designer, such as the Microsoft Visual Web Developer Web development tool or Microsoft Visual Studio.
In this walkthrough you will create the Default. You can copy and paste the source code into files in your ASP. NET directory. This will create the Default. The XML file includes schema information that identifies the database structure of the data. This includes a primary-key constraint for the key.
Business components can work with data in any way that is suited for your application. This walkthrough uses an XML file for convenience. When you have created the Default. Before you add any trace messages to your code, enable tracing for the Default.
Add a Trace attribute to the Page directive, and then set Trace to true. NET Page. Page tracing is now enabled and when you view the page in a Web browser, you will see that the GridView control is followed by tracing output. The second tracing table that is displayed, Trace Information , shows you detailed information about the execution path for the Web page.
To better understand where some basic ASP. NET actions occur, such as the data binding that is performed by the GridView control in the Default.
In your Default. You might have to include a language attribute in your Page directive, depending on which language you use. These trace messages are written to the ASP. NET trace output, and when you view the Default. When you use ASP. NET TraceContext. Write method, the trace category comes in front of the trace message in the parameter list for the method.
However, when you use the. NET Framework tracing Write method, the trace message comes in front of the trace category. Trace information is not displayed in individual pages. NET Page. How to: View ASP. NET Tracing. Application-Level Tracing. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Note To disable tracing for an individual page in the application, set the Trace attribute in that page's Page directive to false.
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