Edit button is clicked two times to work in ASP.NET gridview

See more:

C#

ASP.NET

Gridview

When i am clicking the edit button two times it is firing the event and also the editing field textbox is not focusing it automatically coming out of focus.

Actually this gridview was binded from the sqldatasource not from the method. Not only edit button update and cancel buttons as well. Where i am doing wrong can anyone suggest me. Here i used timer to load the data without refreshing the page

What I have tried:

<asp:UpdatePanel ID="up" runat="server" ChildrenAsTriggers="true" UpdateMode="Conditional">
    <Triggers>
        <asp:AsyncPostBackTrigger ControlID="tGVLoadData" EventName="Tick" />
    </Triggers>
    <ContentTemplate>
        <%-- Timer --%>
        <asp:Timer ID="tGVLoadData" runat="server" Interval="1000" OnTick="Timer1_Tick"></asp:Timer>
        <%-- GridView --%>
        <asp:GridView ID="gv" runat="server" AutoGenerateColumns="False" EmptyDataText="No Records Found" AllowPaging="True" GridLines="Vertical" AlternatingRowStyle-CssClass="alt" SkinID="gridviewSkin" Width="100%" CssClass="label" DataSourceID="DataSource" DataKeyNames="EmpID" OnRowEditing="gv_RowEditing" OnRowCancelingEdit="gv_RowCancelingEdit"                                          OnRowUpdating="gv_RowUpdating" OnRowDataBound="gv_RowDataBound"                                            ShowHeaderWhenEmpty="true" OnRowCommand="gv_RowCommand" EnableViewState="false">
            <AlternatingRowStyle CssClass="alt" />
            <Columns>
                <asp:TemplateField HeaderText="Simple">
                    <ItemTemplate>
                        <asp:Label ID="lblSimple" runat="server" Text='<%#Eval("Simple") %>' Width="40px"></asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="txtSimple" runat="server" Text='<%#Eval("Simple") %>' Width="40px"></asp:TextBox>
                    </EditItemTemplate>
                </asp:TemplateField>
                <%-- Buttons --%>
                <asp:TemplateField ItemStyle-Width="100px">
                    <ItemTemplate>
                        <%-- Edit --%>
                        <asp:Button ID="btnEdit" runat="server" Text="Edit" CssClass="btn btn-link text-center" ToolTip="Edit Details" CommandName="Edit" UseSubmitBehavior="false" OnClick="btnEdit_Click" CausesValidation="false" />
                        <%-- Approve --%>
                        <asp:Button ID="btnSimple" runat="server" Text="Approve" CssClass="btn btn-link text-center" ToolTip="Approve" OnClick="btnSimple" Enabled="false" />
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:Button ID="btnUpdate" runat="server" Text="Update" CommandName="Update" CssClass="btn btn-link" UseSubmitBehavior="false" />
                        <asp:Button ID="btnCancel" runat="server" Text="Cancel" CommandName="Cancel" CssClass="btn btn-link" />
                    </EditItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>

        <asp:SqlDataSource runat="server" ID="DataSource" ConnectionString='<%$ ConnectionStrings:DefaultConnection %>' SelectCommand="SELECT [EmpID] FROM [Emp_Table]"></asp:SqlDataSource>

    </ContentTemplate>
</asp:UpdatePanel>

Code Behind:
PageLoad Event

if(!IsPostBack)
{
   foreach (GridViewRow row in gv.Rows)
   {
       aspBtnEdit = ((Button)row.FindControl("btnEdit"));
       btn = ((Button)row.FindControl("btnSimple"));
       aspBtnUpdate = ((Button)row.FindControl("btnUpdate"));
       aspBtnCancel = ((Button)row.FindControl("btnCancel"));                   
   }
}

Here aspBtnEdit, btn, aspBtnUpdate, aspBtnUpdate are strings declared globally