"選取" Gridview的某一列(RowIndex) ＆ 那一列對應資料表的P.K.值

資料來源：MIS2000 Lab

要擷取「使用者點選了 GridView的哪一列(RowIndex)？」

有很多的寫法

當我們使用 GridView的「選取」命令欄位時，要抓取「使用者點選了哪一列？」，最好寫在 SelectedIndexChanged()事件裡面，運作起來會比較正常！

    Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles GridView1.RowCommand
        Response.Write("

---

== GridView1_RowCommand() ==
")
        Response.Write("GridView1.SelectedIndex--  " & GridView1.SelectedIndex)
        Response.Write("
GridView1.SelectedValue-- " & GridView1.SelectedValue)
    End Sub

'--使用「選取（Select）」命令欄位，通常會用到底下這兩個事件！--

    Protected Sub GridView1_SelectedIndexChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewSelectEventArgs) Handles GridView1.SelectedIndexChanging
        Response.Write("

---

== GridView1_SelectedIndexChanging() ==
")
        Response.Write("GridView1.SelectedIndex--  " & GridView1.SelectedIndex)
        Response.Write("
GridView1.SelectedValue-- " & GridView1.SelectedValue)

        Response.Write("
==============================")    '--下面這兩行，可以正常運作！
        Response.Write("
GridView1.Rows(e.NewSelectedIndex).RowIndex-- " & GridView1.Rows(e.NewSelectedIndex).RowIndex.ToString())    '--抓取那一列「對應資料表」的主索引鍵
        Response.Write("
e.NewSelectedIndex-- " & e.NewSelectedIndex.ToString())  '--抓取那一列的index鍵
    End Sub

    Protected Sub GridView1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles GridView1.SelectedIndexChanged
        Response.Write("

---

== GridView1_SelectedIndexChanged() ==
")
        Response.Write("GridView1.SelectedIndex--  " & GridView1.SelectedIndex)
        Response.Write("
GridView1.SelectedValue-- " & GridView1.SelectedValue)
        Response.Write("
GridView1.SelectedDataKey.Value-- " & GridView1.SelectedDataKey.Value)
    End Sub