在vb中从sql中选择并显示在aspx页面中

Question

只想从数据库中选择一个单词并显示在aspx页面中

后台

Using da As New SqlDataAdapter
        con.Open()
        cmd.CommandText = "SELECT value_en as value FROM tbl_language WHERE element_id = 'a1';"
        da.SelectCommand = cmd
        Dim dt As New DataTable
        da.Fill(dt)
        Dim WordValue As String = dt.Rows(0).Item(0)
End Using

在 aspx 页面中

<%=WordValue%>

这里有什么问题？

Answer 1

将 Connection 分配给命令对象，并将 item(0) 转换为字符串

Using da As New SqlDataAdapter
        con.Open()
        cmd.CommandText = "SELECT value_en as value FROM tbl_language WHERE element_id = 'a1';"
        cmd.Connection =con
        da.SelectCommand = cmd
        Dim dt As New DataTable
        da.Fill(dt)
        Dim WordValue As String = Convert.ToString(dt.Rows(0).Item(0))
End Using

或

Using da As New SqlDataAdapter( "SELECT value_en as value FROM tbl_language WHERE element_id = 'a1';",con)
            Dim dt As New DataTable
            da.Fill(dt)
            Dim WordValue As String = Convert.ToString(dt.Rows(0).Item(0))
    End Using