private clsProduct objProductSelected; private clsInvoiceHeader objInvoiceHeader=null; protected void Page_Load(object sender, EventArgs e) { LoadGrid(); if (Session["InvoiceSession"] == null) { Session["InvoiceSession"] = new clsInvoiceHeader(); } else { objInvoiceHeader = getSessionInvoice(); } Uri objUri = Request.UrlReferrer; if (objUri != null) { if (objUri.AbsolutePath.Contains("SelectProducts.aspx")) { LoadProduct(); clsInvoiceHeader obj = (clsInvoiceHeader)Session["InvoiceSession"]; setUIfromObject(obj); } } } private void LoadProduct() { objProductSelected = (clsProduct)Session["SelectedProduct"]; if (objProductSelected != null) { lblProductDescription.Text = objProductSelected.ProductDescription; lblProductUnitCost.Text= objProductSelected.UnitCost.ToString(); setInvoiceProduct(objProductSelected); } } private void LoadGrid() { // load the data set in to the data grid clsInvoiceHeader objInvoice = new clsInvoiceHeader(); DataSet result = objInvoice.getInvoice(); dtgInvoice.DataSource = result; dtgInvoice.DataBind(); } public void clearText() { txtInvoiceNumber.Text = ""; txtComments.Text = ""; txtInvoiceDate.Text = ""; txtCustomerName.Text = ""; txtCustomerAddress.Text = ""; lblErrorMessage.Text = ""; } public void clearInvoiceDetailText() { TxtQuantity.Text = ""; lblTotalAmountToBePaid.Text = ""; txtTaxAmount.Text = ""; txtAmountPaid.Text = ""; lblProductUnitCost.Text = ""; lblProductDescription.Text = ""; } protected void btnAddInvoice_Click(object sender, EventArgs e) { try { clsInvoiceHeader objInvHeader = (clsInvoiceHeader)Session["InvoiceSession"]; setObjectFromUI(objInvHeader); objInvHeader.Insert(); clearInvoiceDetailText(); LoadGrid(); clearInvoiceDetailText(); clearText(); clearSession(); } catch (Exception ex) { lblErrorMessage.Text = ex.Message.ToString(); } } public void setObjectFromUI(clsInvoiceHeader objInvoiceHeader) { int value; objInvoiceHeader.CustomerName = txtCustomerName.Text; objInvoiceHeader.CustomerAddress = txtCustomerAddress.Text; objInvoiceHeader.InvoiceComments = txtComments.Text; objInvoiceHeader.InvoiceDate = Convert.ToDateTime(txtInvoiceDate.Text); if (objInvoiceHeader.getSelectedIndex() != 0) { if (txtTaxAmount.Text != "") { objInvoiceHeader.getSelectedInvoice().TaxAmount = Convert.ToDouble(txtTaxAmount.Text); } if (txtAmountPaid.Text.Length != 0) { objInvoiceHeader.getSelectedInvoice().PaidAmount = Convert.ToDouble(txtAmountPaid.Text); } if (lblTotalAmountToBePaid.Text.Length != 0) { objInvoiceHeader.getSelectedInvoice().Amount = Convert.ToDouble(lblTotalAmountToBePaid.Text); } if (int.TryParse(lblProductUnitCost.Text, out value)) { objInvoiceHeader.getSelectedInvoice().UnitCost = Convert.ToDouble(lblProductUnitCost.Text); } if(objProductSelected!=null) { objInvoiceHeader.getSelectedInvoice().ProductId = objProductSelected.ProductId; } if (int.TryParse(TxtQuantity.Text,out value)) { objInvoiceHeader.getSelectedInvoice().Quantity = Convert.ToInt16(TxtQuantity.Text); } } } private void setInvoiceProduct(clsProduct objProduct) { if (objInvoiceHeader.getSelectedIndex() != 0) { objInvoiceHeader.getSelectedInvoice().UnitCost = objProduct.UnitCost; objInvoiceHeader.getSelectedInvoice().ProductDescription = objProduct.ProductDescription; objInvoiceHeader.getSelectedInvoice().ProductId = objProduct.ProductId; } } public void setUIfromObject(clsInvoiceHeader objInvoice) { txtCustomerName.Text = objInvoice.CustomerName; txtCustomerAddress.Text = objInvoice.CustomerAddress; txtComments.Text = objInvoice.InvoiceComments; txtInvoiceDate.Text = objInvoice.InvoiceDate.ToString(); txtInvoiceNumber.Text = objInvoice.InvoiceReference.ToString(); if(objInvoice.getSelectedIndex() !=0) { txtTaxAmount.Text = objInvoice.getSelectedInvoice().TaxAmount.ToString(); txtAmountPaid.Text = objInvoice.getSelectedInvoice().PaidAmount.ToString(); lblTotalAmountToBePaid.Text = objInvoice.getSelectedInvoice().Amount.ToString(); lblProductUnitCost.Text = objInvoice.getSelectedInvoice().UnitCost.ToString(); TxtQuantity.Text = objInvoice.getSelectedInvoice().Quantity.ToString(); lblProductName.Text = objInvoice.getSelectedInvoice().ProductDescription.ToString(); lblProductDescription.Text = lblProductName.Text; lblProductUnitCost.Text = objInvoice.getSelectedInvoice().UnitCost.ToString(); lblTotalAmountToBePaid.Text = objInvoice.getSelectedInvoice().Amount.ToString(); } dtgInvoiceDetails.DataSource = objInvoice.getInvoiceDetails(); dtgInvoiceDetails.DataBind(); } private void clearSession() { Session["InvoiceSession"] = null; Session["SelectedProduct"] = null; } protected void btnUpdateInvoice_Click(object sender, EventArgs e) { clsInvoiceHeader objInvHeader = (clsInvoiceHeader)Session["InvoiceSession"]; objInvHeader.addInvoiceDetails(); setObjectFromUI(objInvHeader); clearInvoiceDetailText(); objInvHeader.Update(); Session["InvoiceSession"] = objInvHeader; } protected void btnDeleteInvoice_Click(object sender, EventArgs e) { } protected void dtgInvoice_SelectedIndexChanged(object sender, EventArgs e) { clsInvoiceHeader objInvoiceHeader = new clsInvoiceHeader(); objInvoiceHeader.LoadInvoice(Convert.ToInt16(dtgInvoice.Items[dtgInvoice.SelectedIndex].Cells[1].Text)); dtgInvoiceDetails.DataSource = objInvoiceHeader.getInvoiceDetails(); dtgInvoiceDetails.DataBind(); Session["InvoiceSession"] = objInvoiceHeader; objInvoiceHeader.MoveNext(); setUIfromObject(objInvoiceHeader); } protected void btnProducts_Click(object sender, EventArgs e) { } protected void btnProductsSelect_Click(object sender, EventArgs e) { try { setObjectFromUI(getSessionInvoice()); Response.Redirect("SelectProducts.aspx"); } catch (Exception ex) { lblErrorMessage.Text = ex.Message.ToString(); } } private clsInvoiceHeader getSessionInvoice() { clsInvoiceHeader objInvoiceHeader = (clsInvoiceHeader)Session["InvoiceSession"]; return objInvoiceHeader; } protected void TxtQuantity_TextChanged(object sender, EventArgs e) { lblTotalAmountToBePaid.Text = Convert.ToString(Convert.ToInt16(TxtQuantity.Text) * Convert.ToDouble(lblProductUnitCost.Text)); clsInvoiceHeader objInvoiceHeader = getSessionInvoice(); setObjectFromUI(objInvoiceHeader); } protected void btnAddInvoiceDetails_Click(object sender, EventArgs e) { clsInvoiceHeader obj = (clsInvoiceHeader)Session["InvoiceSession"]; if (obj.getSelectedIndex() == 0) { obj.addInvoiceDetails(); } if (Session["SelectedProduct"] != null) { obj.getSelectedInvoice().ProductId = ((clsProduct)Session["SelectedProduct"]).ProductId; } setObjectFromUI(obj); objInvoiceHeader.Update(); clearInvoiceDetailText(); setUIfromObject(obj); } protected void dtgInvoiceDetails_SelectedIndexChanged(object sender, EventArgs e) { objInvoiceHeader = getSessionInvoice(); objInvoiceHeader.Move(dtgInvoiceDetails.SelectedIndex+1); setUIfromObject(objInvoiceHeader); }