You didn't load the report file using
ReportDocument
object. Sample code should be like below
private void button1_Click(object sender, EventArgs e)
{
ReportDocument cryRpt = new ReportDocument();
cryRpt.Load("PUT CRYSTAL REPORT PATH HERE\\CrystalReport1.rpt");
crystalReportViewer1.ReportSource = cryRpt;
crystalReportViewer1.Refresh();
}
Check this tutorial & its series
C# Crystal Reports step by step[
^]