public void TestUpdateArt()
        {
            Console.WriteLine("TestUpdateArt called");
            Art aTemp = ctrArt.RetrieveByNo(1020);

            Assert.IsNotNull(aTemp, "aTemp is found");

            aTemp.Number = 1200;

            aTemp = ctrArt.Update(aTemp.Id, aTemp.Name, aTemp.Number, aTemp.Artist, aTemp.Description, aTemp.Image, aTemp.StartingBid, aTemp.PurchasePrice);

            Assert.AreEqual(aTemp.Number, 1200, "Number is not equal");

            aTemp = ctrArt.Update(aTemp.Id, aTemp.Name, 1020, aTemp.Artist, aTemp.Description, aTemp.Image, aTemp.StartingBid, aTemp.PurchasePrice);
        }
 private void btnSave_Click(object sender, EventArgs e)
 {
     if (txtName.Text != "")
     {
         if (grbCreate.Text == "Opret")
         {
             ctrArt.Insert(txtName.Text, txtArtist.Text, txtDescription.Text, txtImgUrl.Text, Convert.ToDecimal(txtStartPrice.Text), Convert.ToDecimal(txtPurchasePrice.Text));
         }
         else if (grbCreate.Text == "Rediger")
         {
             Art selectedArt = (Art)dgvAtrList.CurrentRow.DataBoundItem;
             int id          = selectedArt.Id;
             ctrArt.Update(id, txtName.Text, Convert.ToInt32(txtNumber.Text), txtArtist.Text, txtDescription.Text, txtImgUrl.Text, Convert.ToDecimal(txtStartPrice.Text), Convert.ToDecimal(txtPurchasePrice.Text));
         }
         loadArtPieces();
         clearTxtBoxes();
     }
     else
     {
         MessageBox.Show("Udfyld kunstværkets navn");
     }
 }