Displaying table data in GridView

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ASP.NET

hi,

i need to display the data in gridview.i had taken one page viewexisting bookings in that i taken one gridview and i need to display when any one books the conferenceroom that data should display in gridview.

And other requirement is if the person who booked the room what to do any changes he can do in the gridview.so i taken edit button and cancel button also.but that button should be enable to the persons who booked the room for other employees it should be disable.
And duplicate booking should not be allowed.

please suggest me.

public partial class HRMSViewExisting : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            FillGridView();
        }
    }

    private void FillGridView()
    {
        DataSet ds;
        ConferenceBL confBL = new ConferenceBL();
        ds = confBL.GetConferenceRoom();

        gvconference.DataSource = ds;
        gvconference.DataBind();

    }
}