阿博哥的天空

Partial Public Class test2

    Inherits System.Web.UI.Page

    Dim goodList As New DataTable("googlist")
    Dim newRow As DataRow

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        '建立欄位名稱
        goodList.Columns.Add("商品名稱", System.Type.GetType("System.String"))
        goodList.Columns.Add("商品價格", System.Type.GetType("System.Int32"))
        goodList.Columns.Add("商品數量", System.Type.GetType("System.Int32"))


'新增一筆資料
        newRow = goodList.NewRow
        newRow(0) = "生活紅茶"
        newRow(1) = "10"
        newRow(2) = 1
        goodList.Rows.Add(newRow)
        GridView1.DataSource = goodList
        GridView1.DataBind()

    End Sub


    Protected Sub Button2_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button2.Click
        newRow = goodList.NewRow
        newRow(0) = "珍珠奶茶"
        newRow(1) = 25
        newRow(2) = 5
        goodList.Rows.Add(newRow)
        GridView1.DataSource = goodList
        GridView1.DataBind()
    End Sub

End Class

重複按Button2會有什麼結果？如下圖所示：

媽的！這是怎麼回事？誰來告訴我？