Forms Data Controls :: Unable To Edit The Grid View

When I click on edit button I am expecting it to change like a text box and let me edit the content. But it is not happening. Can you see my code and let me know What I am missing?

<asp:GridView ID="gvSearch" runat="server" AutoGenerateColumns="False" AllowPaging="True"
AllowSorting="true" Width="650px" PageSize="20" OnRowCommand="gvSearch_RowCommand" OnRowDataBound="gvSearch_RowDataBound"
OnRowEditing="gvSearch_RowEditing" OnRowUpdating="gvSearch_RowUpdating"
>
<Columns>
<asp:TemplateField HeaderText="User Id" SortExpression="User Id">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="False" HorizontalAlign="Left" />
<ItemTemplate>
<asp:Label ID="lblusrId" runat="server" Text='<%# Eval("UserId")%> '></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="First Name" SortExpression="FirstName">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="False" HorizontalAlign="Left" />
<ItemTemplate>
<asp:Label ID="lblFname" runat="server" Text='<%# Eval("FirstName")%> '></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Last Name" SortExpression="LastName">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="False" HorizontalAlign="Left" />
<ItemTemplate>
<asp:Label ID="lblLname" runat="server" Text='<%# Eval("LastName")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="MiddleName" SortExpression="CreatedOn">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="False" HorizontalAlign="Left" />
<ItemTemplate>
<asp:Label ID="lblMname" runat="server" Text='<%# Eval("MiddleName")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Employee Id" SortExpression="EmployeeId">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="False" HorizontalAlign="Left" />
<ItemTemplate>
<asp:Label ID="lblEmpId" runat="server" Text='<%# Eval("EmployeeId")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="User Status" SortExpression="NetId">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="False" HorizontalAlign="Left" />
<ItemTemplate>
<asp:Label ID="lblUsrStatus" runat="server" Text='<%# Eval("UserStatus")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="View User Details" SortExpression="View">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="True" HorizontalAlign="Left" />
<ItemTemplate>
<asp:LinkButton ID="lbView" Text="View Details" runat="server" CommandName="View" CommandArgument='<%#Eval("FirstName")+";"+Eval("LastName")+";"+Eval("UserId")%>' ></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="View User Details" SortExpression="View">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="True" HorizontalAlign="Left" />
<ItemTemplate>
<asp:LinkButton ID="lbledit" Text="Edit" runat="server" CommandName="Edit" CommandArgument='<%#Eval("FirstName")+";"+Eval("LastName")+";"+Eval("UserId")%>' ></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
protected void gvSearch_RowCommand(object source, GridViewCommandEventArgs e)
{
if (e.CommandName == "View")
{
string arg = Convert.ToString(e.CommandArgument);
// Response.Redirect("~/CFEmpDetails.aspx?arg=" + arg);
}
if (e.CommandName == "Edit")
{
}
}
protected void gvSearch_RowDataBound(Object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
}
}
protected void gvSearch_RowEditing(object sender, GridViewEditEventArgs e)
{
}
protected void gvSearch_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
}