datatable - vb.net 中的字符串生成器附加格式

Question

让字符串生成器从数据表中接收到值。datatable 包含名为 ename 的列，并包含如下值

abc
abc
abc

in stringbuilder stored this value in the following format abcabcabc.

code

 Do While (i < dt.Rows.Count)

        sb.Append(dt.Rows(i)("ename").ToString)
                   i = (i + 1)
   Loop

Expected output abc,abc,abc .how to do this?