displaying a datagridview cell value in one form in another datagridview cell in another form

Question

I am developing a billing system for a store.I have a form1 in which there are two texyboxes and a datagridview.Cardno is enetered in textbox1 and it fetches the name of the customer and checks whether this customer has made purchase for this month and the datagridview is focussed.
Datagridview1 has the following columns

Sl.No
Product No
Product Name
Rate
Qty
Amount

what i need is when i press a enter key in product no column in datagridview1 a datagridview2 showing all the products and product code is loaded in form2.I can select the product code from there.Upto here i was able to do

Now what i want is when i select the product code in datagridview2 in form2 that product code is to be displayed in datagridview1 product code column and depending upon that the product name and rate columns should be populated on datagridview1 .How can i do this.I do not want the form1 to reload with the form2 values because i already have the text box values displayed in form1

Pls help and thanks in advance

Vulpes · Answer

Well the code skeleton I've given you above is for writing some cell values in a particular row of DataGridView1 in the current instance of Form1. You said originally that you wanted to pass back the product code product name and rate back to Form1 but if you only want to pass the first of these then just change the method to take a single parameter. You also said in your opening post that you'd already figured out how to capture the enter key being pressed in the product number column in DataGridView1 (you'll need to save the row number to be updated at that point of course) and you should be able to use the same technique for capturing the enter key being pressed in DataGridView2. I don't know how you're doing it at the moment but one possibility for capturing keys is described in this thread: http://social.msdn.microsoft.com/Forums/en-US/winformsdatacontrols/thread/a646b4fc-143a-4e87-9c64-8d5dc0260792

Vulpes · Answer

Well the first thing I'd do is to add a public or internal instance method to Form1 which when called will populate the appropriate row of DataGridView1 with the product code product name and rate. These variables will of course need to be passed as parameters to the method. Secondly I'd change the constructor of Form2 so that it accepts as a parameter a reference to Form1. You'll then have something like this: // on Form1 internal void PopulateDGV1Row(int prodCode string prodName double rate) { // code to find and populate row with these values } // in the event handler when enter key pressed in product no column Form2 f2 = new Form2(this); // pass reference to Form1 to Form2 f2.Show(); // on Form2 class Form2 : Form { private Form1 f1; public Form2(Form1 f1) { InitializeComponent(); this.f1 = f1; // store reference to Form1 } // in the event handler for selecting product code in DataGridView2 f1.PopulateDGV1Row(prodCode prodName rate); // ... }

ullas K · Answer

Thank you very Much Vulpes for your support and it is working

ullas K · Answer

Thank you Vulpes. But want i need is i do not want to populate the entire datagridview.Form1 is loaded and when i press enter key in datagridview1 form2 datagridview2 is loaded with product code and product name.When i select a product in datagridview2 and press the enter key form2 is closed and i want that product code alone to be displayed in already loaded form1 datagridview product code column(Column[1]).Remember form1 i already loaded so how can i acheive this or which event should i use to get that value