Find Button inside a Gridview and click it from codebehind(c#)

I need to click a button that is inside a gridview from the codebehind. I think the best approach will be to create a javascript function in codebehind, something like the second solution i tried below. I will appreciate any help

    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {

        if (e.CommandName == "Accepted")
        {

            int index = Convert.ToInt32(e.CommandArgument);

            GridViewRow row = GridView1.Rows[index];

       //find button

            Button btnEsc = (Button)row.FindControl("btnEsc");

       //here I would like to simulate a click on this button, so far no luck

        btnEsc.Click(); // this is wrong

         }
      }

I also try this but it doesn't find the button: I dont know how to find the button inside the gridview

           System.Text.StringBuilder sbScript = new System.Text.StringBuilder("");
           sbScript.Append("document.getElementById('btnEsc').click();");
           ScriptManager.RegisterStartupScript(this, GetType(), "ClientScript", sbScript.ToString(), true);

Solution

Code behind:

public partial class WebForm1 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        btn.Text = "Refreshed";
        if (Request.Params["btnPressed"] != null && Request.Params["btnPressed"] == "true")
        {
            ScriptManager.RegisterStartupScript(Page, typeof(Page), "OpenWindow", string.Format("$('#{0}').click()", btn.ClientID), true);
        }
    }

    protected void btn_Click(object sender, EventArgs e)
    {

        btn.Text = "Not Refreshed";
        lbl.Text = "Not Refreshed";
        System.Threading.Thread.Sleep(1000);
        ////to refresh the page
        Page.Response.Redirect(HttpContext.Current.Request.Url.ToString()+"?btnPressed=true", true);
    }
}

Load jquery in aspx page:

<body>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
    <form id="form1" runat="server">
    <div>
    <asp:Button runat="server" ID="btn" OnClick="btn_Click" PostBackUrl="/WebForm1.aspx" />
        <asp:Label runat="server" ID="lbl"> </asp:Label>
    </div>
    </form>
</body>

You should really learn jquery, its a great tool. g/l.