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This article is to share with you about how C # implements tracking. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

First, why do you need to use tracking technology:

The tracking feature allows you to view messages from a running application (a released program). We write the code that defines messages (different levels of messages) in the application and configure them according to the configuration file to write different levels of messages. Where will these messages be written? Vs is written to the output window by default. The output window can only be seen in debug mode. What do we do when we track the released program? We need to define a listener in the configuration file to accept messages written from the application. Let's introduce tracking in detail.

Second, tracking architecture:

①, tracking source: the source of tracking information. For example, you need to track an assembly or a namespace or a class

②, switch: the switch defines the level of information to be recorded. For example, you can request error information or details

③, listener: defines the location where trace messages are written.

④, filter: filter the level of information to be logged. For example, the switch defines the Information level, and you can use filtering to record only the Error information level.

Need to reference the namespace: using System.Diagnostics

III. Parameter comparison table

Several listener types listener description System.Diagnostics.XmlWriterTraceListener writes Xml files System.Diagnostics.TextWriterTraceListener writes text System.Diagnostics.DelimitedListTraceListener writes text with delimiters Profile properties (delimiter= ":") set delimited System.Diagnostics.EventLogTraceListener write event log WebPageTraceListener write TraceEventType trace event type in web trace file trace.axd event description Critical defines fatal error or application crash Error represents recoverable error Information informational message Verbose debug trace Warning non-critical problem (warning) start Stop logic of Transfer related identity change Start logic operation Stop Suspand logical operation of operation suspend Resume logical operation resume SourceLevels switch level () level description ActivityTracing allows Stop, The Start, Suspend, Transfer, and Resume events passed. All allows all events to pass. Critical only allows Critical events to pass through. Error allows Critical and Error events to pass through. Information allows Critical, Error, Warning, and Information events to pass through. Off does not allow any events to pass. Verbose allows Critical, Error, Warning, Information, and Verbose events to pass through. Warning allows Critical, Error, and Warning events to pass through. TraceOptions defines the trace data option to write to the trace output (the traceOutputOptions property of the listener) parameter description Callstack write call stack DateTime write date and time LogicalOperationStack write logic operation stack None does not write how to manipulate ProcessId write process identification ThreadId write thread identification Timestamp write timestamp

4. Configure the tracking file:

Write the message code in the application

Using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Diagnostics;namespace TraceDome4 {class Program {/ / trace source internal static TraceSource trace = new TraceSource ("TraceDome4"); static void Main (string [] args) {/ / start of logical operation trace.TraceEvent (TraceEventType.Start, 0, "start of logical operation") / / write ordinary message trace.TraceInformation ("write message"); / / write error message, enumerate different message levels trace.TraceEvent (TraceEventType.Error, 0, "error message") according to TraceEventType; / / end trace.TraceEvent of logical operation (TraceEventType.Stop, 0, "end of logical operation") / / write ordinary message trace.TraceInformation ("write message");}

Use the service trace viewer to view the xml

Write the message code in the application (relevance)

Callstack,LogicalOperationStack must be set for the trace data option to use correlation

Using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Diagnostics;using System.Threading;namespace TraceDome4 {class Program {/ / trace source internal static TraceSource trace = new TraceSource ("TraceDome4"); static void Main (string [] args) {/ / set an active ID Trace.CorrelationManager.ActivityId = Guid.NewGuid () / / start of logical operation trace.TraceEvent (TraceEventType.Start, 0, "start of logical operation"); / / enable logical operation on thread Trace.CorrelationManager.StartLogicalOperation ("Main Operation"); / / write normal message trace.TraceInformation ("write message") / / write error messages and enumerate different message levels trace.TraceEvent (TraceEventType.Error, 0, "error message") according to TraceEventType; / / start a thread Thread th = new Thread (new ThreadStart (Simple)); th.Start (); / / stop the logical operation on the thread Trace.CorrelationManager.StopLogicalOperation () / / end of the logical operation trace.TraceEvent (TraceEventType.Stop, 0, "end of the logical operation");} private static void Simple () {/ / set an active ID Trace.CorrelationManager.ActivityId = Guid.NewGuid (); / / enable the logical operation Trace.CorrelationManager.StartLogicalOperation ("Simple Operation") on the thread / / write warning message trace.TraceEvent (TraceEventType.Warning, 0, "warning message"); / / stop logical operation on the thread Trace.CorrelationManager.StopLogicalOperation ();}

Thank you for reading! This is the end of the article on "how to track C#". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!

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