The source of the report definition has not been specified
<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>
