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Extending Expressions Overview

Expressions can easily be extended by providing user functions written in any .NET language. This is very useful in addition to the built-in functions, providing more complex domain-specific calculations or for uniform calculations because it speeds up the processing and boosts the performance. Furthermore, you can add custom aggregate functions to apply domain-specific logic while accumulating values.

In order to expose your custom functions, so they can be utilized by the Reporting engine, you have to add a reference to the assembly they are defined in. The reference is added under the AssemblyReferences configuration section in the application's configuration file.

<configuration>
      <configSections>
          <section
              name="Telerik.Reporting"
              type="Telerik.Reporting.Configuration.ReportingConfigurationSection, Telerik.Reporting"
              allowLocation="true"
              allowDefinition="Everywhere"/>
      </configSections>
      …
       <Telerik.Reporting>
          <AssemblyReferences>
              <add name="MyCustomAssembly" version="1.0.0.0" />
          </AssemblyReferences>
       </Telerik.Reporting>
</configuration>

See Also

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