Update column status from 0 to 1 on Button Click in ASP.Net

While Updating status is not changing from 0 to 1

        protected void Button1_Click(object sender, EventArgs e)
        {
            foreach (GridViewRow row in gvData.Rows)
            {
                CheckBox status = (row.Cells[1].FindControl("chk") as CheckBox);

                if (status.Checked)
                {
                    try
                    {
                        SqlCommand cmd = new SqlCommand("Update AddRaw_199 set status=1 where Name= + '" + row.Cells[2].Text + "'", con);
                        cmd.CommandType = CommandType.Text;
                        cmd.Connection = con;
                        con.Open();
                        int suc = cmd.ExecuteNonQuery();

                        if (suc > 0)
                        {
                            SendMail(row.Cells[1].Text);
                            gvData.DataBind();
                            if (gvData.Rows.Count == 0)
                            {
                                lbl_app.CssClass = "text-center text-primary";
                                lbl_app.Text = "All Users are approved ";
                                Button1.Visible = false;
                            }
                        }
                    }
                    catch
                    {
                    }
                    finally
                    {
                        if (con.State == ConnectionState.Open)
                            con.Close();
                    }
                }
            }

            lbl_app.CssClass = "text-center text-success";
            Response.Redirect("ViewFarmer.aspx");
            lbl_app.Text = "Status Updated Successfully";
        } 

<asp:Label ID="lbl_app" runat="server"></asp:Label>
<asp:GridView ID="gvData" runat="server" AutoGenerateColumns="False" HeaderStyle-Height="100px"
    ShowFooter="True" Width="100%" Font-Size="25px" HorizontalAlign="Center" CellPadding="4"
    ForeColor="#333333" GridLines="None">
    <AlternatingRowStyle BackColor="White" />
    <Columns>
        <asp:TemplateField HeaderText="Approve">
            <HeaderTemplate>
                <div class="text-center">
                    <asp:CheckBox ID="CheckBox2" runat="server" AutoPostBack="True" OnCheckedChanged="CheckBox2_CheckedChanged" />Approve/Reject
                </div>
            </HeaderTemplate>
            <ItemTemplate>
                <asp:CheckBox ID="chk" runat="server" />
            </ItemTemplate>
            <ItemStyle HorizontalAlign="Center" />
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Name">
            <ItemTemplate>
                <asp:Label ID="Name" runat="server" Text='<%# Eval("Name") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>                
        <asp:TemplateField HeaderText="Total">
            <ItemTemplate>
                <asp:Label ID="Total" runat="server" Text='<%# Eval("Total") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>
<asp:Button ID="Button1" runat="server" Text="Add" ForeColor="Red" OnClick="Button1_Click"
    Font-Size="20px" CssClass="bg-primary" Width="100px" Height="50px" />