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我可以知道如何在基於下面的代碼的griview中刪除，更新或編輯按鈕？如何在網格視圖中添加刪除，更新或編輯按鈕？
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server">
<asp:TextBox ID="test1" runat="server"/>
<asp:TextBox ID="test2" runat="server"/>
<asp:DropDownList ID = "test3" runat="server" AutoPostBack="false" ></asp:DropDownList>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
<asp:GridView ID="GridView1" runat="server" ></asp:GridView>
<asp:Button ID="Button2" runat="server" Text="Button" OnClick="Button2_Click"/>
Save view state data into database Error