Partial Class Default2
Inherits System.Web.UI.Page
Public a() As String
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
For i = 0 To 9
ReDim Preserve a(i)
a(i) = i
Response.Write(a(i))
Next
End Sub
Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
Response.Write(a(1))
End Sub
End Class
按button2时,提示 System.NullReferenceException: 未将对象引用设置到对象的实例。为啥啊,先谢了
Inherits System.Web.UI.Page
Public a() As String
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
For i = 0 To 9
ReDim Preserve a(i)
a(i) = i
Response.Write(a(i))
Next
End Sub
Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
Response.Write(a(1))
End Sub
End Class
按button2时,提示 System.NullReferenceException: 未将对象引用设置到对象的实例。为啥啊,先谢了
解决方案 »
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