Question

试图从我的azure数据库获得响应，我正在使用推荐的microsoft snippet

Dim sb As StringBuilder = New StringBuilder()
sb.Append("select top 1 runname from vNameCode")
'sb.Append("where untgscod = ")
Dim sql As String = sb.ToString()
Using command As SqlCommand = New SqlCommand(sql, connection)
    Using reader As SqlDataReader = command.ExecuteReader()
        While reader.Read()
            Console.WriteLine("{0} {1}", reader.GetString(0), reader.GetString(1))
        End While

但是当我尝试读取值时，我得到了错误：

System.IndexOutOfRangeException：“索引在数组的边界之外。”

我找回了一个对象，但无法以推荐的方式读取它。有什么想法我做错了吗？

Answer 1

由于您从表runname中获得了vNameCode，但是您正试图从reader中访问两个值。

进行以下一项更改：

在SELECT语句中包含相应的值。
从reader.GetString()移除Console.WriteLine

尝试以下

Dim sb As StringBuilder = New StringBuilder()
sb.Append("select top 1 runname from vNameCode")     
Dim sql As String = sb.ToString()
Using command As SqlCommand = New SqlCommand(sql, connection)
    Using reader As SqlDataReader = command.ExecuteReader()
        While reader.Read()
            Console.WriteLine("{0}", reader.GetString(0))
        End While
    End Using
End Using

无法读取SqlDataReader对象

1 个答案: