title: The source of the report definition has not been specified
body: <p>I'm using following Codes typing the parameters.....</p>
  
  <pre><code>var invdata = SaleInvCode.GetbyId(invID);
  var invdat = (from a in db.invDetails where a.InvDetailID == invID select new { a.SaleInv, a.ProName, a.Discription, a.SaleQTY, a.SalePrice, a.SaleAmount }).ToList();
  //var invdetai = from a in db.invHeaders select a;
  /////////////////////////
  invHeader.DataSource = invdata;
  reportViewer1.LocalReport.DataSources.Add(new ReportDataSource(reportViewer1.LocalReport.GetDataSourceNames()[0], invHeader));
  reportViewer1.ProcessingMode = Microsoft.Reporting.WinForms.ProcessingMode.Local;
  </code></pre>
  
  <p><strong>error</strong></p>
  
  <pre><code>Error:: The source of the report definition has not been specified
  </code></pre>
  
  <p>I'm creating Report parameter.....</p>