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Can anyone help me fix a InvalidCastException on VS windows forum C#

Kep Deep
Kep Deep asked
Last Modified: 2017-03-26
An unhandled exception of type 'System.InvalidCastException' occurred in mscorlib.dll

Additional information: Unable to cast object of type 'System.Data.DataRowView' to type 'System.IConvertible'.

        private void listgames_Click(object sender, EventArgs e)
            DataRow drgameshop;
            int rowNo;

            rowNo = Convert.ToInt32(lstgames.SelectedValue);   //THIS IS WHERE THE ERROR OCCURS

            drgameshop = dscategory.Tables["Category"].Rows.Find(rowNo);

            lblCN.Text = drgameshop["Category.CategoryNo"].ToString();
            lblSN.Text = drgameshop["Stock.StockNo"].ToString();
            lblSD.Text = drgameshop["StockDesc"].ToString();
            lblQ.Text = drgameshop["Qty"].ToString();
            lblCP.Text = drgameshop["CostPrice"].ToString();
            lblSP.Text = drgameshop["SellingPrice"].ToString();
            lblRL.Text = drgameshop["ReOrderLevel"].ToString();
            lblRQ.Text = drgameshop["ReOrderQty"].ToString();
            lblSupNo.Text = drgameshop["Supplier.SupplierNo"].ToString();
            lblON.Text = drgameshop["OrderDetail.Orderno"].ToString();
            lblQO.Text = drgameshop["QtyOrdered"].ToString();

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