Update gridview editable changes to dataset inturn to a sql table

Question

Update gridview editable changes to dataset inturn to a sql table

Here is my .aspx page

   <form id="form1" runat="server">

    <div>

    <asp:GridView ID="GV" runat="server"  AutoGenerateColumns="false">

    <Columns>

    <asp:TemplateField HeaderText="Name">

    <ItemTemplate >

    <asp:TextBox ID="txtName" runat="server" Text='<%#Eval("Name") %>'></asp:TextBox>

    </ItemTemplate>

    </asp:TemplateField>

    <asp:BoundField DataField="EmailId" HeaderText="Email" />

    </Columns>

    </asp:GridView>

    

    </div>

    <asp:Button ID="btnSave" runat="server" Text="Save" />

  

    </form>

Now i am binding it from code behind on page load as given below

 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        If Page.IsPostBack Then

            Dim str As String = ConfigurationManager.AppSettings("DBConn")

            Dim Conn As New SqlConnection(str)

            Conn.Open()

            Dim qry As String = "SELECT * FROM dbo.Employee"

            Dim adp As New SqlDataAdapter(qry, Conn)

            Dim ds As New DataSet

            adp.Fill(ds)

            GV.DataSource = ds

            GV.DataBind()

        End If

    End Sub

Now I have textbox as a editable field and user will make the changes to those textboxes

and What i want is after click of a save button those changes to be updated in dataset and further in sql Employee table

Without any kind of loop

Please suggest