<sources> Element

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>  

See also