How to update Gridview

[RAB]

I have created a web site using asp.net 2.0. One of my pages has the
following code:

<%@ Page Language="VB" MasterPageFile="~/Default.master"
AutoEventWireup="false" CodeFile="Add_Dept.aspx.vb"
Inherits="Sched_Admin_Add_Dept" title="Untitled Page" %>
<asp:Content ID="Content1" ContentPlaceHolderID="Main" Runat="Server">
<br />


<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AllowSorting="True"
AutoGenerateColumns="False" DataKeyNames="Dept_Id"
DataSourceID="SqlDataSource_GetDepartments">
<Columns>
<asp:CommandField ShowDeleteButton="True"
ShowEditButton="True" ShowSelectButton="True" />
<asp:BoundField DataField="Dept_Id" HeaderText="Dept_Id"
InsertVisible="False" ReadOnly="True"
SortExpression="Dept_Id" />
<asp:BoundField DataField="Dept_Name"
HeaderText="Dept_Name" SortExpression="Dept_Name" />
</Columns>
</asp:GridView>

<asp:SqlDataSource ID="SqlDataSource_GetDepartments" runat="server"
ConflictDetection="CompareAllValues"
ConnectionString="<%$ ConnectionStrings:MyConnectionString %>"
DeleteCommand="DELETE FROM [Departments] WHERE [Dept_Id] =
@original_Dept_Id AND [Dept_Name] = @original_Dept_Name"
InsertCommand="INSERT INTO [Departments] ([Dept_Name]) VALUES
(@Dept_Name)" OldValuesParameterFormatString="original_{0}"
SelectCommand="SELECT * FROM [Departments] ORDER BY
[Dept_Name]" UpdateCommand="UPDATE [Departments] SET [Dept_Name] =
@Dept_Name WHERE [Dept_Id] = @original_Dept_Id AND [Dept_Name] =
@original_Dept_Name">
<DeleteParameters>
<asparameter Name="original_Dept_Id" Type="Int32" />
<asparameter Name="original_Dept_Name" Type="String" />
</DeleteParameters>
<UpdateParameters>
<asparameter Name="Dept_Name" Type="String" />
<asparameter Name="original_Dept_Id" Type="Int32" />
<asparameter Name="original_Dept_Name" Type="String" />
</UpdateParameters>
<InsertParameters>
<asparameter Name="Dept_Name" Type="String" />
</InsertParameters>
</asp:SqlDataSource>
<br />

<aspetailsView ID="DetailsView1" runat="server"
AutoGenerateRows="False"
DataKeyNames="Dept_Id"
DataSourceID="SqlDataSource_AddDepartments" Height="50px"
Width="125px" CellPadding="4" ForeColor="#333333"
GridLines="None" DefaultMode="Insert">
<Fields>
<asp:BoundField DataField="Dept_Id" HeaderText="Dept_Id"
InsertVisible="False" ReadOnly="True"
SortExpression="Dept_Id" Visible="False" />
<asp:BoundField DataField="Dept_Name"
HeaderText="Department Name" SortExpression="Dept_Name" />
<asp:CommandField ShowInsertButton="True" />
</Fields>
<FooterStyle BackColor="#507CD1" Font-Bold="True"
ForeColor="White" />
<CommandRowStyle BackColor="#D1DDF1" Font-Bold="True" />
<RowStyle BackColor="#EFF3FB" />
<FieldHeaderStyle BackColor="#DEE8F5" Font-Bold="True" />
<PagerStyle BackColor="#2461BF" ForeColor="White"
HorizontalAlign="Center" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True"
ForeColor="White" />
<EditRowStyle BackColor="#2461BF" />
<AlternatingRowStyle BackColor="White" />
</aspetailsView>

<asp:SqlDataSource ID="SqlDataSource_AddDepartments" runat="server"
ConflictDetection="CompareAllValues"
ConnectionString="<%$ ConnectionStrings:MyConnectionString %>"
DeleteCommand="DELETE FROM [Departments] WHERE [Dept_Id] =
@original_Dept_Id AND [Dept_Name] = @original_Dept_Name"
InsertCommand="INSERT INTO [Departments] ([Dept_Name]) VALUES
(@Dept_Name)" OldValuesParameterFormatString="original_{0}"
SelectCommand="SELECT * FROM [Departments]"
UpdateCommand="UPDATE [Departments] SET [Dept_Name] = @Dept_Name WHERE
[Dept_Id] = @original_Dept_Id AND [Dept_Name] = @original_Dept_Name">
<DeleteParameters>
<asparameter Name="original_Dept_Id" Type="Int32" />
<asparameter Name="original_Dept_Name" Type="String" />
</DeleteParameters>
<UpdateParameters>
<asparameter Name="Dept_Name" Type="String" />
<asparameter Name="original_Dept_Id" Type="Int32" />
<asparameter Name="original_Dept_Name" Type="String" />
</UpdateParameters>
<InsertParameters>
<asparameter Name="Dept_Name" Type="String" />
</InsertParameters>
</asp:SqlDataSource>
<br />
<br />
<br />
&nbsp;<br />
<br />
</asp:Content>

After I insert a new department into the database using the
Detailsview how can the new department be seen in the Gridview
without having to refresh the page?

Thanks in advance,
RABMissouri2010