How to avoid duplicate products in a VB.NET 2010 listview and increase the quantity

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It is a form for sales, from a textbox I enter the product code and then the product information in the listview is displayed with the code, product name, price, quantity, discount, subtotal and tax.

When I add the same product, it is added in another line but what I want to do is instead of adding another line with the same product what I want it to do is to increase the quantity automatically and not add it to another line unless it is a different product, I have been trying for a long time and it is not achieved, if you can help me I would be very grateful.

What I have tried:

I tried to solve it using this forum but I haven't been able to get it done:
How to avoid duplicate products in a VB.NET 2010 listview and increase the quantity[^]

Posted 5-Apr-17 6:12am

Ivan Umaña

Updated 5-Apr-17 8:26am

Afzaal Ahmad Zeeshan

v2

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[no name] 5-Apr-17 12:17pm

"I tried to solve it using this forum", you tried what?
"but I haven't been able to get it done", why not?
Do you think reposting the same "question" over and over is going to help somehow?

Dave Kreskowiak 5-Apr-17 12:29pm

So, in your Add code, did you first execute a query for the ProductCode to see if it already existed in the database? I doubt it.

Karthik_Mahalingam 5-Apr-17 12:37pm

post the code

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CHill60 · Accepted Answer · 2017-04-05T08:17:00

Solution 2

I answered this question for you on your original post Como evitar productos duplicados en un listview VB.NET 2010 y que se aumente la cantidad[^]

Posted 5-Apr-17 8:17am

CHill60