how to create a button text change with click event in asp.net gridview

I have set button text change using javascript but Onclick and OnclientClick is not working at the same time.

 <asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" 
            CellPadding="4"
            ForeColor="#CC0066" 
            GridLines="None" style="margin-top: 0px" Width="181px" Height="65px" 
               ShowHeader="False" onrowdatabound="GridView2_RowDataBound">
            <AlternatingRowStyle BackColor="White" />
            <Columns>
                <asp:TemplateField>
                <ItemTemplate>
                <b>Profile Photo:</b>&nbsp;&nbsp;<img id="img1" alt="image" src='<%# Eval("photo")%>' height='80' width='80'/>
                <br />
                 
                <%-- <b>Name:</b>&nbsp;&nbsp;<%#Eval("name") %><br />&nbsp;&nbsp;
                 <b>Address:</b>&nbsp;&nbsp;<%#Eval("Address") %><br />&nbsp;&nbsp;
                 <b>college:</b>&nbsp;&nbsp;<%#Eval("college") %><br />&nbsp;&nbsp;--%>
                    <asp:Button ID="Btnclick" runat="server" Text="Follow" 
                        onclick="Btnclick_Click"  OnClientClick="javascript:return SetText(this)" CausesValidation="False" />
               </ItemTemplate>
                  </asp:TemplateField>
                  
                  <asp:BoundField DataField="name" />
                 <asp:BoundField DataField="Address" />
                  <asp:BoundField DataField="college" />
            </Columns>
            <EditRowStyle BackColor="#2461BF" />
            <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            <HeaderStyle BackColor="#507CD1" Font-Bold="True"/>

            <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
            <RowStyle BackColor="#EFF3FB" />
            <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
            <SortedAscendingCellStyle BackColor="#F5F7FB" />
            <SortedAscendingHeaderStyle BackColor="#6D95E1" />
            <SortedDescendingCellStyle BackColor="#E9EBEF" />
            <SortedDescendingHeaderStyle BackColor="#4870BE" />
        </asp:GridView>

  function SetText(id) {
           if (id.value == "Follow") {
               id.value = "Followed";
           }
           else if (id.value == "Followed") {
               id.value = "unfollow";
           }
           return false;
       }
</script>

 string name;
    protected void Btnclick_Click(object sender, EventArgs e)
    {
        //string script = "successfi";
        //string sta = "Followed";
        //ClientScript.RegisterStartupScript(this.GetType(), "SetText",script, true);
        Lblid.Text = (string)Session["id"].ToString();
        Lblname.Text = (string)Session["nam"].ToString();
        lbluserphoto.Text = (string)Session["pho"].ToString();

        GridViewRow grdrow = (GridViewRow)((Button)sender).NamingContainer;

        ((Button)sender).Enabled = true;
        conn.Open();
        SqlDataAdapter sda = new SqlDataAdapter("select photo from Registerationtable where name='" + grdrow.Cells[1].Text + "'", conn);
        DataSet ds = new DataSet();
        sda.Fill(ds);

        Session["photo"] = ds.Tables[0].Rows[0]["photo"].ToString();
        conn.Close();
        string sta = Lblname.Text + " " + "is followed you";
        Lblphoto.Text = (string)Session["photo"].ToString();
        conn.Open();
        //SqlDataAdapter sda = new SqlDataAdapter("select name,photo,status from Registerationtable where id='"+Lblid.Text+"'",conn);
        //DataSet ds = new DataSet();
        //sda.Fill(ds);
        SqlCommand cmd = new SqlCommand("insert into Following values('" + Lblid.Text + "','" + Lblname.Text + "','" + lbluserphoto.Text + "','" + Lblphoto.Text + "','" + grdrow.Cells[1].Text + "','" + grdrow.Cells[2].Text + "','" + sta + "')", conn);
        int result = cmd.ExecuteNonQuery();
        if (result > 0)
        {
            Response.Write("<script>alert('follow successfully')</script>");
        }

        conn.Close();
        conn.Open();
        SqlCommand cmd2 = new SqlCommand("select username,userphoto,status from Following where followname='" + grdrow.Cells[1].Text + "'", conn);
        SqlDataAdapter sda1 = new SqlDataAdapter(cmd2);
        DataSet ds1 = new DataSet();
        sda1.Fill(ds1);
        conn.Close();
        Session["uname"] = ds1.Tables[0].Rows[0]["username"].ToString();
        Session["phot"] = ds1.Tables[0].Rows[0]["userphoto"].ToString();
        //Session["phot"]=ds1.Tables[0].Rows[0]["photo"].ToString();
        Session["stat"] = ds1.Tables[0].Rows[0]["status"].ToString();

    }
    protected void GridView2_RowDataBound(object sender, GridViewRowEventArgs e)
    {
     if (e.Row.RowType == DataControlRowType.DataRow)
     {
         (e.Row.FindControl("Btnclick") as Button).Attributes.Add("onclick", string.Format("SetText('{0}');", (e.Row.ClientID)));
     }
    }

Please tell me the solution.

Onclick is not working at the same time