private void button1_Click(object sender, EventArgs e)
      {
          ReportDocument rpt = new ReportDocument();
          //crtestreport rpt = new crtestreport();

          SqlCommand cmdcsp_workorder = new SqlCommand("sp_testspworkorder", con);
          cmdcsp_workorder.CommandType = CommandType.StoredProcedure;
           //cmdcsp_workorder.Parameters.Add
         //cmdcsp_workorder.Parameters.Add("@customername", SqlDbType.NVarChar, 50) = "";
          cmdcsp_workorder.Parameters.Add("@customername", SqlDbType.NVarChar, 50).Value = "APGB";
          cmdcsp_workorder.Parameters.Add("@regionname", SqlDbType.NVarChar, 50).Value = "APGB KADAPA";
          cmdcsp_workorder.Parameters.Add("@location", SqlDbType.NVarChar, 50).Value = "ANANTAPUR ";
          cmdcsp_workorder.Parameters.Add("@system", SqlDbType.NVarChar, 50).Value = "SAS";
          //cmdcsp_workorder.Parameters.Add("@district ", SqlDbType.NVarChar, 50).Value = cmbdistrict.SelectedValue;
          //cmdcsp_workorder.Parameters.Add("@engineer", SqlDbType.NVarChar, 50).Value = cmbengname.SelectedValue;
          //cmdcsp_workorder.Parameters.Add("@StartDate", SqlDbType.DateTime).Value = dtpfromdate.Text ;
          //cmdcsp_workorder.Parameters.Add("@EndDate", SqlDbType.DateTime).Value = dtptodate.Text ;
          //cmdcsp_workorder.Parameters.Add("@Branch", SqlDbType.VarChar, 50).Value = DDL_BranchName.SelectedValue;

          cmdcsp_workorder.Connection = con;

          SqlDataAdapter da = new SqlDataAdapter(cmdcsp_workorder);
          //DataSet ds = new DataSet(DataSetworkorder);
          //DBForSafetySystemsDataSet ds = new DBForSafetySystemsDataSet();
          DataSet ds = new DataSet();
          DataTable workorderdt = new DataTable();
          da.SelectCommand = cmdcsp_workorder;
          da.Fill(ds , "workorderdt");

          int rowcount = ds.Tables[0].Rows.Count;

          if (rowcount != 0)
          {
              //string reportPath = Server.MapPath("C:\\Documents and Settings\\Administrator.POSITIVE\\Desktop\\shivani\\MasterPage(30)\\MasterPage\\crtestreport.rpt");
             //string reportPath = Microsoft.SqlServer.Server.MapPath("..//crtestreport.rpt");

              rpt.Load("c:\\Users\\Mohan\\Desktop\\MasterPage(30)\\MasterPage\\crtestreport.rpt");
              //rpt.DataDefinition.FormulaFields["username"].Text = "'" + System.Environment.UserName.ToString() + "'";

              rpt.SetDataSource(ds.Tables[0]);
              crystalReportViewer1.ReportSource = rpt;
              crystalReportViewer1.Visible = true;
              //crystalReportViewer1.DataBind();
              //crystalReportSource1.DataBind();
              crystalReportViewer1.ReportSource = rpt;
              //CrystalReportViewer1.ShowAllPageIds = true;

          }

its urgent plz any one rectify my error and send.