无法更改 GridView_SelectedIndexChanged 上的 Formview 模式

Question

我希望我的 Formview 以插入模式启动，然后在用户从 Gridview 中选择一行时更改为编辑模式在同一页面中。

Formview 具有内联属性：DefaultMode="Insert"

这是如何完成的以及为什么不起作用？

protected void GridView1_SelectedIndexChanged(object sender, System.EventArgs e)   
{   
    FormView1.ChangeMode(FormViewMode.Edit);
} 

编辑1： FormView 源代码

<asp:FormView ID="FormView1" runat="server" DataKeyNames="AdID" DataSourceID="AdByID" DefaultMode="Insert">
<EditItemTemplate>
    Caption:
    <asp:TextBox ID="CaptionTextBox" runat="server" Text='<%# Bind("Caption") %>' />
    <br />
    Summary:
    <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Summary") %>'></asp:TextBox>
    <br />
    Text:
    <telerik:RadEditor ID="RadEditor1" Runat="server" Content='<%# Bind("Text") %>' ToolsFile="~/crm/annonser/ToolsFile.xml"  
        Language="sv-SE" ToolbarMode="Default" 
        AllowScripts="True" EditModes="Design" Skin="Office2007" 
        StripFormattingOnPaste="MSWord" Width="500px">
        <Content>
        </Content>
    </telerik:RadEditor>
    <br />
    Name:
    <asp:TextBox ID="NameTextBox" runat="server" Text='<%# Bind("Name") %>' />
    <br />
    Email:
    <asp:TextBox ID="EmailTextBox" runat="server" Text='<%# Bind("Email") %>' />
    <br />
    Phone:
    <asp:TextBox ID="PhoneTextBox" runat="server" Text='<%# Bind("Phone") %>' />
    <br />
    PhoneHidden:
    <asp:CheckBox ID="PhoneHiddenCheckBox" runat="server" 
        Checked='<%# Bind("PhoneHidden") %>' />
    <br />
    Price:
    <asp:TextBox ID="PriceTextBox" runat="server" Text='<%# Bind("Price") %>' />
    <br />
    CategoryCodeID:
    <asp:DropDownList ID="DropDownList2" runat="server" 
        DataSourceID="AdCategoryMarket" DataTextField="Caption" 
        DataValueField="AdCategoryCodeID" SelectedValue='<%# Bind("CategoryCodeID") %>'>
    </asp:DropDownList>
    <asp:ObjectDataSource ID="AdCategoryMarket" runat="server" 
        DeleteMethod="Delete" InsertMethod="Insert" 
        OldValuesParameterFormatString="original_{0}" SelectMethod="GetData" 
        TypeName="dsCRMTableAdapters.app_AdCategoryCodeTableAdapter" 
        UpdateMethod="Update">
        <DeleteParameters>
            <asp:Parameter Name="Original_AdCategoryCodeID" Type="Int32" />
        </DeleteParameters>
        <InsertParameters>
            <asp:Parameter Name="Caption" Type="String" />
            <asp:Parameter Name="DisplayOrder" Type="Int32" />
            <asp:Parameter Name="CategoryTypeID" Type="Int32" />
        </InsertParameters>
        <UpdateParameters>
            <asp:Parameter Name="Caption" Type="String" />
            <asp:Parameter Name="DisplayOrder" Type="Int32" />
            <asp:Parameter Name="CategoryTypeID" Type="Int32" />
            <asp:Parameter Name="Original_AdCategoryCodeID" Type="Int32" />
        </UpdateParameters>
    </asp:ObjectDataSource>
    <br />
    StateCodeID:
    <asp:DropDownList ID="DropDownList3" runat="server" DataSourceID="AdStateCode" 
        DataTextField="Caption" DataValueField="AdStateCodeID" 
        SelectedValue='<%# Bind("StateCodeID") %>'>
    </asp:DropDownList>
    <asp:ObjectDataSource ID="AdStateCode" runat="server" DeleteMethod="Delete" 
        InsertMethod="Insert" OldValuesParameterFormatString="original_{0}" 
        SelectMethod="GetData" 
        TypeName="dsCRMTableAdapters.app_AdStateCodeTableAdapter" UpdateMethod="Update">
        <DeleteParameters>
            <asp:Parameter Name="Original_AdStateCodeID" Type="Byte" />
        </DeleteParameters>
        <InsertParameters>
            <asp:Parameter Name="Caption" Type="String" />
        </InsertParameters>
        <UpdateParameters>
            <asp:Parameter Name="Caption" Type="String" />
            <asp:Parameter Name="Original_AdStateCodeID" Type="Byte" />
        </UpdateParameters>
    </asp:ObjectDataSource>
    <br />
    RegionCodeID:
    <asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="Regions" 
        DataTextField="name" DataValueField="RegionCodeID" 
        SelectedValue='<%# Bind("RegionCodeID") %>'>
    </asp:DropDownList>
    <asp:ObjectDataSource ID="Regions" runat="server" 
        OldValuesParameterFormatString="original_{0}" SelectMethod="GetData" 
        TypeName="dsCRMTableAdapters.app_RegionCodeTableAdapter">
    </asp:ObjectDataSource>
    <br />
    StopDate:
    <telerik:RadDatePicker ID="RadDatePicker1" Runat="server" Culture="sv-SE" 
        DbSelectedDate='<%# Bind("StopDate") %>'>
    </telerik:RadDatePicker>
    <br />
    <br />
    <asp:LinkButton ID="InsertButton" runat="server" CommandName="Insert" Text="Insert" />
    &nbsp;
    <asp:LinkButton ID="UpdateButton" runat="server" CommandName="Update" Text="Update" CommandArgument='<%# Eval("AdID") %>' />
    &nbsp;
    <asp:LinkButton ID="UpdateCancelButton" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel" />
</EditItemTemplate></asp:FormView>

FormView DataSource

<asp:ObjectDataSource ID="AdByID" runat="server"  
OldValuesParameterFormatString="original_{0}" SelectMethod="GetDataByID" 
TypeName="dsCRMTableAdapters.app_AdTableAdapter" DeleteMethod="Delete" 
InsertMethod="Insert" UpdateMethod="Update">
<DeleteParameters>
    <asp:Parameter Name="Original_AdID" Type="Int32" />
</DeleteParameters>
<InsertParameters>
    <asp:Parameter Name="Caption" Type="String" />
    <asp:Parameter Name="Summary" Type="String" />
    <asp:Parameter Name="Text" Type="String" />
    <asp:Parameter Name="Name" Type="String" />
    <asp:Parameter Name="Email" Type="String" />
    <asp:Parameter Name="Phone" Type="String" />
    <asp:Parameter Name="PhoneHidden" Type="Boolean" />
    <asp:Parameter Name="Price" Type="Decimal" />
    <asp:Parameter Name="CategoryCodeID" Type="Byte" />
    <asp:Parameter Name="StateCodeID" Type="Byte" />
    <asp:Parameter Name="RegionCodeID" Type="Byte" />
    <asp:Parameter Name="StopDate" Type="DateTime" />
    <asp:Parameter Name="ModifiedBy" Type="Int32" />
    <asp:Parameter Name="CreatedOn" Type="DateTime" />
    <asp:Parameter Name="ModifiedOn" Type="DateTime" />
    <asp:Parameter DbType="Guid" Name="AdGUID" />
</InsertParameters>
<SelectParameters>
    <asp:ControlParameter ControlID="GridView1" Name="AdID" PropertyName="SelectedValue" Type="Int32" DefaultValue="0" />
</SelectParameters>
<UpdateParameters>
    <asp:Parameter Name="Caption" Type="String" />
    <asp:Parameter Name="Summary" Type="String" />
    <asp:Parameter Name="Text" Type="String" />
    <asp:Parameter Name="Name" Type="String" />
    <asp:Parameter Name="Email" Type="String" />
    <asp:Parameter Name="Phone" Type="String" />
    <asp:Parameter Name="PhoneHidden" Type="Boolean" />
    <asp:Parameter Name="Price" Type="Decimal" />
    <asp:Parameter Name="CategoryCodeID" Type="Byte" />
    <asp:Parameter Name="StateCodeID" Type="Byte" />
    <asp:Parameter Name="RegionCodeID" Type="Byte" />
    <asp:Parameter Name="StopDate" Type="DateTime" />
    <asp:Parameter Name="ModifiedBy" Type="Int32" />
    <asp:Parameter Name="CreatedOn" Type="DateTime" />
    <asp:Parameter Name="ModifiedOn" Type="DateTime" />
    <asp:Parameter DbType="Guid" Name="AdGUID" />
    <asp:Parameter Name="Original_AdID" Type="Int32" />
</UpdateParameters></asp:ObjectDataSource>

---

数据按预期更新，但似乎没有事件触发...以下重定向根本不会发生：

protected void FormView1_ItemUpdated(Object sender, FormViewCommandEventArgs e)
{
    Response.Redirect("www.stackoverflow.com");
}

最初的问题很可能来自那里，您不认为吗？问题是，如何让事件按预期进行？