private void GetGradeDetails()
 {
     m_tSupplyGrade   = new DataTable();
     m_tContractGrade = new DataTable();
     m_tServiceGrade  = new DataTable();
     m_tSupplyGrade   = m_oRegister.GetGradeName(m_lVendorId, "S");
     m_tContractGrade = m_oRegister.GetGradeName(m_lVendorId, "C");
     m_tServiceGrade  = m_oRegister.GetGradeName(m_lVendorId, "H");
     if (m_tSupplyGrade != null)
     {
         if (m_tSupplyGrade.Rows.Count > 0)
         {
             txtSGradeName.Text = m_tSupplyGrade.Rows[0][1].ToString();
             txtSGradeName.Tag  = m_tSupplyGrade.Rows[0][0].ToString();
         }
         else
         {
             txtSGradeName.Text = "";
             txtSGradeName.Tag  = 0;
         }
     }
     else
     {
         txtSGradeName.Text = "";
         txtSGradeName.Tag  = 0;
     }
     if (m_tContractGrade != null)
     {
         if (m_tContractGrade.Rows.Count > 0)
         {
             txtCGradeName.Text = m_tContractGrade.Rows[0][1].ToString();
             txtCGradeName.Tag  = m_tContractGrade.Rows[0][0].ToString();
         }
         else
         {
             txtSGradeName.Text = "";
             txtSGradeName.Tag  = 0;
         }
     }
     else
     {
         txtCGradeName.Text = "";
         txtCGradeName.Tag  = 0;
     }
     if (m_tServiceGrade != null)
     {
         if (m_tServiceGrade.Rows.Count > 0)
         {
             txtHGradeName.Text = m_tServiceGrade.Rows[0][1].ToString();
             txtHGradeName.Tag  = m_tServiceGrade.Rows[0][0].ToString();
         }
         else
         {
             txtSGradeName.Text = "";
             txtSGradeName.Tag  = 0;
         }
     }
     else
     {
         txtHGradeName.Text = "";
         txtHGradeName.Tag  = 0;
     }
 }