異なるテーブルについて同じフィールドがあります。名前も同じでなければならないのでhashtableでできます。

  public class tbHashHeadText
   {
      public Hashtable getHashHeadText()
      {
         Hashtable tbHtTxt = new Hashtable();
         tbHtTxt.Add("ImpId", " ID");

         tbHtTxt.Add("RptID", " ID");
         tbHtTxt.Add("RptCode", " ");
         tbHtTxt.Add("RptName", " ");
         tbHtTxt.Add("RptDate", " ");
         tbHtTxt.Add("RptStatus", " ");
         tbHtTxt.Add("CreateDtim", " ");
         tbHtTxt.Add("CreateUser", " ");
         tbHtTxt.Add("CreateIP", " IP");
         tbHtTxt.Add("ChangeDtim", " ");
         tbHtTxt.Add("ChangeUser", " ");
         tbHtTxt.Add("ChangeIP", " IP");
         tbHtTxt.Add("Note", " ");
 

         return tbHtTxt;

      }

   }

//-----------------------------------------------------------------------------------------

  :


      private void setHeadText(int iTag)
      {
          
         if (iTag == 4 || iTag ==5 )
         {
            DataClass.tbHashHeadText hashText = new tbHashHeadText();

            Hashtable htTb = hashText.getHashHeadText();

            foreach (DictionaryEntry de in htTb)
            {
               if (dataGridView1.Columns[de.Key.ToString()] != null)
               {
                  dataGridView1.Columns[de.Key.ToString()].HeaderText = de.Value.ToString();
               }
            }
         }
 
      }