<sources> Element

Artikkel
09/15/2021

Specifies trace sources that initiate tracing messages.

<configuration>
<system.diagnostics>
<sources>

Syntax

<sources>  
   <source>...</source>  
</sources>

Attributes and Elements

The following sections describe attributes, child elements, and parent elements.

Attributes

None.

Child Elements

Element	Description
<source>	Required element. Specifies a trace source that initiates tracing messages.

Parent Elements

Element	Description
`configuration`	The root element in every configuration file used by the common language runtime and .NET Framework applications.
`system.diagnostics`	Specifies trace listeners that collect, store, and route messages and the level where a trace switch is set.

Remarks

This element can be used in the machine configuration file (Machine.config) and the application configuration file.

Example

The following example shows how to use the <sources> element to add the trace source mySource and to set the level for the source switch named sourceSwitch. A console trace listener is added that writes trace information to the console.

<configuration>  
   <system.diagnostics>  
      <sources>  
         <source name="mySource" switchName="sourceSwitch"
            switchType="System.Diagnostics.SourceSwitch"  >  
            <listeners>  
               <add name="console"
                  type="System.Diagnostics.ConsoleTraceListener" >  
                  <filter type="System.Diagnostics.EventTypeFilter"
                     initializeData="Error" />  
               </add>  
               <remove name="Default" />  
            </listeners>  
         </source>  
      </sources>  
      <switches>  
         <add name="sourceSwitch" value="Warning" />  
      </switches>
   </system.diagnostics>
</configuration>

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