Gridview的rowupdating事件无法触发。
前台代码：
<asp:GridView ID="GVrota" runat="server" AllowSorting="True" AutoGenerateColumns="False" GridLines="None" DataKeyNames="id0" CellPadding="5" OnRowCancelingEdit="GVrota_RowCancelingEdit" OnRowEditing="GVrota_RowEditing" OnRowUpdating="GVrota_RowUpdating">
  <EmptyDataTemplate>
  数据库连接故障<br />
  </EmptyDataTemplate>
  <Columns>
  <asp:CommandField ShowEditButton="True" />
  <asp:TemplateField HeaderText="日期">
  <HeaderStyle HorizontalAlign="Left" />
  <ItemTemplate>
  <asp:Label ID="Label1" runat="server" Text='<%# Bind("日期") %>' Width="80px"></asp:Label>
  </ItemTemplate>
  <ItemStyle HorizontalAlign="Left" />
  </asp:TemplateField>
  <asp:TemplateField HeaderText="星期">
  <HeaderStyle HorizontalAlign="Center" />
  <ItemTemplate>
  <asp:Label ID="Label2" runat="server" Text='<%# Bind("星期") %>' Width="20px"></asp:Label>
  </ItemTemplate>
  <ItemStyle HorizontalAlign="Center" />
  </asp:TemplateField>
  <asp:TemplateField HeaderText="公司领导">
  <HeaderStyle HorizontalAlign="Center" />
  <ItemTemplate>
  <asp:Label ID="Label3" runat="server" Text='<%# Bind("公司领导") %>' Width="60px"></asp:Label>
  </ItemTemplate>
  <EditItemTemplate>
  <asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("公司领导") %>'></asp:TextBox>
  </EditItemTemplate>
  <ItemStyle HorizontalAlign="Center" />
  </asp:TemplateField>
  <asp:TemplateField HeaderText="值班人员">
  <HeaderStyle HorizontalAlign="Center" />
  <ItemTemplate>
  <asp:Label ID="Label4" runat="server" Text='<%# Bind("值班人员") %>' Width="60px"></asp:Label>
  </ItemTemplate>
  <EditItemTemplate>
  <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("值班人员") %>'></asp:TextBox>
  </EditItemTemplate>
  <ItemStyle HorizontalAlign="Center" />
  </asp:TemplateField>
  <asp:TemplateField HeaderText="备注">
  <HeaderStyle HorizontalAlign="Left" />
  <ItemTemplate>
  <