信息栏增加异常显示红色

UserClass/ERRinf.cs

@@ -38,8 +38,9 @@ namespace DyeingComputer.UserClass
         public static int i=0;
         public static string ERRinf_r(DataTable dataTable)//读取
         {
-            if (i >= dataTable.Rows.Count) { i = 0; } else { i++; }
-                string index = dataTable.Rows[i].Field<string>("INF");
+            if (i < 0) { i = dataTable.Rows.Count - 1; }
+            string index = dataTable.Rows[i].Field<string>("INF");
+            i--;
             return index;
         }
     }