editable gridview on button click

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C#

ASP.NET4

hi all,

I have this question that is really confusing me......I have got one editable gridview with edit, update and cancel properties. Now when I am calling the gridview function in pageload like following, it works fine..

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            bindcon();  //gridview
        }
    }

but what I need is to show the gridview in editable mode on button click...so I am calling the function inside click event.....but then the edit or update or cancel are not working properly....can anyone explain why??

protected void btn_Click(object sender, EventArgs e)
    {
        lblnmorg.Text = "ABC";
        orgnm = "ABC";
        bindcon();   //gridview
    }

this isnt working...