分配值？

Question

我有这个

 Public Shared Sub Button9_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button9.Click
    Dim c As Client
    Dim Armor As Item = c.Inventory.GetItemInSlot(SlotNumber.Armor)
End Sub

当我点击按钮时，崩溃并且＆＃34; System.NullReferenceException＆＃34;弹出，我已经四处搜索，发现它发生了，因为在分配值之前使用了c，所以我想知道，为它赋值的正确方法是什么？

Answer 1

试试这个：

而不是：

Public Shared Sub Button9_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button9.Click
    Dim c As New Client
    Dim Armor As Item = c.Inventory.GetItemInSlot(SlotNumber.Armor)
End Sub

尝试：

Public Shared Sub Button9_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button9.Click
    Dim c As New Client.Inventory
    Dim Armor As Item = c.Inventory.GetItemInSlot(SlotNumber.Armor)
End Sub