Question

所以这似乎不应该那么困难，但显然我忽略了什么......？我有一个有4列的数据表。我想从数据表输出仅第二列。这是我到目前为止所得到的：

Dim dt As New DataTable
** Datatable is set here **
Dim row As DataRow
Dim col As DataColumn

For Each row In dt.Rows
    'Output Column 2 here
    'This is what I had which obviously doesn't work
    Response.Write(row(col(1)))
    Response.Write("<br />")
Next

Answer 1

您应该将输出列值的行更改为：

Response.Write(row(1))

Answer 2

或者这个：

Dim col As DataColumn = dt.Columns（1）

回复于（行（列））

看起来您的问题是col变量未设置为任何

从数据表输出单个列

2 个答案: