关于 asp.net:GridView 触发某些事件两次

GridView firing some events twice

目前，当我在 gridview 行上编辑 SortOrder 字段时，许多事件被执行了两次，我不确定为什么会发生这种情况。当我尝试更新字段的值时，这会导致问题，因为在事件数据的第二次触发期间会丢失。

一些笔记：

当 Page_Load 中的 IsPostBack = False 时，我正在执行数据绑定
FillCombinations() 将数据绑定到网格
我有 AutoEventWireup="false"
事件触发的顺序是：单击编辑时 RowEditing() x2，单击更新时 RowUpdating() x2，单击取消时 CancelRowEditing() x2

代码：

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Private Sub FillCombinations()

Dim DT As New DataTable
DT = DA.GetProductCombinations()

Me.grdCombinations.DataSource = DT
Me.grdCombinations.DataBind()

End Sub

Protected Sub grdCombinations_RowEditing(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewEditEventArgs) Handles grdCombinations.RowEditing

grdCombinations.EditIndex = e.NewEditIndex
FillCombinations()
End Sub

Protected Sub grdCombinations_CancelRowEditing(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCancelEditEventArgs) Handles grdCombinations.RowCancelingEdit

grdCombinations.EditIndex = -1
FillCombinations()
End Sub

Protected Sub grdCombinations_RowUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewUpdateEventArgs) Handles grdCombinations.RowUpdating

Try
Dim prodCombID As Integer = Convert.ToInt32(grdCombinations.Rows(e.RowIndex).Cells(0).Text)
Dim sortVal As Integer = Convert.ToInt32(DirectCast(grdCombinations.Rows(e.RowIndex).Cells(6).Controls(0), TextBox).Text)

DA.UpdateProductCombination(prodCombID, sortVal)
Catch ex As Exception
lblError.Text ="Error Occurred - Could not update Product Combination"
lblError.Visible = True
DA.InsertException(-1,"UpdateProductCombination", ex.Message, ex.StackTrace)
Finally
'leave edit mode
grdCombinations.EditIndex = -1
FillCombinations()
End Try
End Sub

标记：

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<cc1:TabPanel runat="server" HeaderText="View current combinations" ID="TabPanel2" TabIndex="2">
<ContentTemplate>

<asp:GridView ID="grdCombinations" runat="server" AllowSorting="True" DataKeyNames="ProductCombinationID"
CssClass="ProductCombinationGrid" CellPadding="4" ForeColor="#333333"
BackColor="White" BorderWidth="1px" BorderColor="#CC9966" AutoGenerateColumns="False" AutoGenerateEditButton="false"
OnRowDeleting="grdCombinations_RowDeleting" OnRowEditing="grdCombinations_RowEditing"
OnRowCancelingEdit="grdCombinations_CancelRowEditing" OnRowUpdating="grdCombinations_RowUpdating">
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<Columns>

</Columns>
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#999999" />
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
</asp:GridView>
</ContentTemplate>
</cc1:TabPanel>