NET Trace. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. How to: View ASP. Note When you enable tracing for an application, you can display trace output in any page in the application by setting the pageOutput attribute of the trace element to true in the Web. Note If the mostRecent attribute of the trace element is false, then the trace viewer tracks requests only up to the number of requests defined by the requestLimit attribute.
By default, application-level tracing can be viewed only on the local Web server computer. To make application-level trace information visible from remote computers, you can set the trace element's LocalOnly attribute to false.
To help keep the Web application secure, use the remote tracing capability only when you are developing or deploying your application. Make sure that you disable it before you transfer your application to production Web servers.
To do this, set the LocalOnly attribute to true in the Web. The following example shows an application trace configuration that collects trace information for up to 40 requests. It also enables browsers on computers other than the server to display the trace viewer. You can append custom trace information to the trace display in an ASP. NET page or to the trace log. The trace information that is written to the trace log is viewable with the trace viewer. You can write trace information by using the TraceContext class's Warn or Write methods.
The difference between the two methods is that a message written with the Warn method appears in red text. The following example shows how to use the TraceContext class to display trace information at the end of an ASP.
A different exception is thrown for each LinkButton control that caused the postback. The error message that is used to initialize the ArgumentException or InvalidOperationException instance is displayed in the trace log. You can view trace information that is appended at the end of an ASP. NET page or in the trace viewer. In both cases, the information displayed is the same. NET organizes the trace information in a series of tables.
The status-code value associated with the response. The Trace Information section displays the flow of page-level events. If you have created custom trace messages, the messages are displayed in the Trace Information section also. The custom trace category specified in a Warn or Write method call, if any.
The custom trace message specified in a Warn or Write method, if any. The elapsed time in seconds since the first trace message was processed. The first trace message appears at the top of the list. The elapsed time in seconds between the processing of the current trace message and the previous trace message. NET server controls that are created in the page. The identification for the control. The size in bytes of the rendered control including child controls.
The size in bytes of the control's view state excluding child controls. For more information, see ASP. The size in bytes of the control's control state excluding child controls. The Session State section displays information about values that are stored in Session state, if any. The Application State section displays information about values stored in Application state, if any. The Request Cookies and Response Cookies sections display information about the cookies that are passed between the browser and the server on each request and response.
The section displays both persistent and session cookies. NET creates some cookies automatically, such as those for cookie-based Session state and for forms authentication. NET Cookies Overview. Header information is used to control how request messages are processed and how response messages are created. In a URL, query string information is separated from the path information by a question mark?
The Server Variables section displays a collection of server-related environment variables and request header information. Inheritors are not supposed to implement these methods but it is a good idea to implement these methods. Descriptions of these methods are given in the beginning of the article. Write and WriteLine methods are overloaded; following is a list of all the overloaded version of the Write method:.
For this article, I have created a Trace Listener, DatabaseTraceListener , which actually stores trace and debug messages into a database. You can check the code snippets in the source code of this article.
If you want to implement your own Trace Listener, simply derive your listener class from TraceListener class, implement at least the Write and WriteLine methods and you are done.
In our Example, Flush and Close methods simply save all the cached messages into the database. I tried to put maximum topics related to Tracing of ASP. I hope this will help a few new developers who want to learn tracing in ASP.
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Explains the step by step approach to trace the ASP. NET application. Download demo - 1. Trace Vs System. Trace Integrate System. Let's start with creating a new website. Copy Code.
Jitendra Zaa. Having more than 9 years of experience in Programming and web application development. Writing technical blog articles, learning new Programming languages , frameworks and sharing knowledge with others is one of my hobby. The more I learn, more I understood that how little I know and that drives me to dig into technology and languages to explore. From last few years now, working on Salesforce platform and providing customer solutions using force. I have worked on many area of Salesforce like force.
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