Question

 Dim cd As SqlCommand = New SqlCommand("select datepart(mm,Birthday) as MonthDates from Information where Name='" & cbname.Text & "'", con)
            Dim reader1 As SqlDataReader = cd.ExecuteReader
            While reader1.Read
                Dim mon As Integer = reader1("MonthDates")
                lblbday.Text = mon

我使用此代码假设SQL中的新命名列将在vb net中读取，但不会读取新命名的列“MonthDates”。

代码有什么问题？请帮忙。提前谢谢！

Answer 1

你应该在查询后处理连接（在我的例子中使用这样做）：

Using con As New SqlConnection(....)
    Dim cd As SqlCommand = New SqlCommand("select datepart(mm,Birthday) as MonthDates from Information where Name='" & cbname.Text & "'", con)
    Dim mon As Integer = cd.ExecuteScalar()
    lblbday.Text = mon
End Using

vb.net从新名称sql数据库获取值

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