Sap Crystal Report Error

if (TextBox1.Text == "")
      {
          DataTable dt = new DataTable();
          SqlConnection con = new SqlConnection();
          con.ConnectionString = "Data Source=PALANIVEL;Initial Catalog=HMS;User ID=sa;Password=login";
          con.Open();
          SqlDataAdapter ad = new SqlDataAdapter();
          // VDateWiseDocAppt t2 = new VDateWiseDocAppt();
          DeptWiseIP t2 = new DeptWiseIP();
          ad = new SqlDataAdapter("select * from  Vw_InPatient where Department_Name between '" + TextBox1.Text + "' ", con);
          ad.Fill(dt);
          t2.SetDataSource(dt);
          CrystalReportViewer1.ReportSource = t2;
          CrystalReportViewer1.RefreshReport();
      }