只查询一条信息进行列比对

UAS-出货标签管理(吉利通)/PublicMethod/AccessDBHelper.cs

@@ -1002,7 +1002,7 @@ namespace UAS_LabelMachine
 
         public void AddColumFromDataTable(DataTable dt, string tablename)
         {
-            DataTable dt2 = (DataTable)ExecuteSql("select * from " + tablename + "", "select");
+            DataTable dt2 = (DataTable)ExecuteSql("select top 1 * from " + tablename + "", "select");
             foreach (var item in dt.Columns)
             {
                 if (!dt2.Columns.Contains(item.ToString()))