Question

DTName是一个DataTable，它返回下面代码中的行...当我通过循环从0迭代到它的计数时。仅显示第一行中的数据。

如何获取结果中显示的数据表的所有行？

DTName = GetClientNames()

   If Not DTName Is Nothing Then

      For i = 0 to DTName.Rows.count

         strName = DTName.Rows(i).Item("Client Name").Tostring()

      Next i

   End if

Answer 1

当For i = 0 to DTName.Rows.count的值等于IndexOutOfRangeException时，

i最终会抛出DTName.Rows.count错误，限制应为DTName.Rows.count - 1。

要获取所有数据行的所有值，请将它们存储在List：

中

    Dim strName As New List(Of String)

    For i = 0 to DTName.Rows.count - 1

       strName.Add(DTName.Rows(i)("Client Name").Tostring())

    Next i

或者你可以像这样使用Foreach：

    For Each DR As DataRow In DTName.Rows

       strName.Add(DR("Client Name").Tostring())

    Next

我还建议您删除冗余检查DTName.Rows.Count > 0

编辑：您可以将strName声明为string并向其追加行值：

    For i = 0 to DTName.Rows.count - 1

        strName &= (DTName.Rows(i)("Client Name").Tostring() & ",")

    Next i

    Response.Write(strName)

Answer 2

双击以检查列的实际ColumnName。

For Each item As DataRow In dataTable.Rows
    strName = item("Client Name").ToString()
    Console.WriteLine(strName)
Next

从vb.net中的数据表返回数据

2 个答案: