DataGridView in Billing Style

Question

I have a restaurant billing software application.In that I use datagridview for billing table.
I used itemname, quantity ,rate,amount as datacolumns...
When i enter quantity i want to automatically fill amount column(rate and item are already filled).
Which event is used for that pupose(for better working)???
Also I want to refresh datagridview for next entry after each bill printig.
How to refresh it?? refresh means looks like a new entry editing mode-previous data should be deleted..
plz help me..

pawan charvak · Answer

GridView Editing.. Set propertiew AutoGenerateColumns:false so that we can specify our column information. Goto source view and write code for Gridview. asp : GridView ID ="GridView1" runat ="server" Height ="199px" > Columns > asp : BoundField DataField ="articaleId" HeaderText ="Code" ReadOnly =true /> asp : TemplateField HeaderText ="itemname" > EditItemTemplate > asp : DropDownList ID ="DropDownList1" runat ="server"> asp : ListItem > C# asp : ListItem > asp : ListItem > ASP.net asp : ListItem > asp : ListItem > CPP asp : ListItem > asp : ListItem > C language asp : ListItem > asp : ListItem > Pascal asp : ListItem > asp : ListItem > Froton asp : ListItem > asp : DropDownList > EditItemTemplate > ItemTemplate > asp : Image ID ="Image1" ImageUrl = # GetLevel(Eval("itemname")) %> runat ="server" /> ItemTemplate > asp : TemplateField > asp : TemplateField HeaderText ="Rating"> EditItemTemplate > asp : DropDownList ID ="DropDownList2" runat ="server"> asp : ListItem > 1 asp : ListItem > asp : ListItem > 2 asp : ListItem > asp : ListItem > 3 asp : ListItem > asp : ListItem > 4 asp : ListItem > asp : ListItem > 5 asp : ListItem > asp : DropDownList > EditItemTemplate > ItemTemplate > asp : Label ID ="t1" runat ="server" Text = # Eval("rating") %> /> ItemTemplate > asp : TemplateField > asp : CommandField HeaderText ="Modify" EditText ="Edit" CancelText ="Cancel" DeleteText ="Delete" ShowEditButton =true ShowCancelButton =true ShowDeleteButton =true ButtonType =Image EditImageUrl ="~/Image/edit.gif" DeleteImageUrl ="~/Image/delete.gif" CancelImageUrl ="~/Image/cancel.jpg" UpdateImageUrl ="~/Image/update.png" /> Columns > asp : GridView >