page load event i ile alip atama yaptigin id degeri btnguncelle eventinin icinde kullanamazsin btn guncelle eventinin icinde degisken tanimlayip atama yap.

rob33n gozunden nasil kacti?

protected void btnGuncelle_Click(object sender, EventArgs e)
{
string idno = request.querystring["id"];

SqlConnection baglanti = system.baglan();
SqlCommand cmd = new SqlCommand("Update zaiyat set gonderildi = 1 Where Id=@id", baglanti);
cmd.Parameters.Add("@id", idno);
cmd.ExecuteNonQuery();


Response.Redirect("Onayligiderler.aspx");
}