title: Explicitly Adding Export to Excel option in SSRS rdl
body: <p>I have created chart report in SSRS and i am using SharePoint to deploy the report. I need to add a "Export to Excel" button in RDL so that user can export the chart or data into excel.
  I know that in rdl\SP we have the option, but i need to add this explicitly in the rdl.
  How can this be done ?</p>