How to compare values of listview after loading the items into the listview and after add or delete items into or from it C#?

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I am a newbie in C#. Please HELP me.

Scenario:

I have a Form, named as frmModifyService. This Form will show service details which proceed earlier. In this Form there is a ListView, if I will select a Service ID from a ComboBox all the used componets of that service will load into the ListView. The ListView is named as lvSelectedItems. And that is perfectly working. This Form, frmModifyService will provide us the chance to edit services and its details including the service components in the ListView, lvSelectedItems. There are two Buttons besides the lvSelectedItems named as cmdAdd and cmdDelete. We can add more items into the lvSelectedItems. And also we can delete selected items from the ListView, lvSelectedItems. There is an another Button named as cmdUpdate. This Button helps us to update the current service details of a specific Service ID into my MySQL database.

Problem:

How do we know is there is any changes occurred in our lvSelectedItems while executing cmdUpdate_Click event? Please HELP I am stuck.

What I have tried:

I don't know how to work on this problem. So I didn't tried anything.

Posted 5-Sep-17 4:49am

.dot IT Solutions

Updated 5-Sep-17 7:20am

v2

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Richard MacCutchan 5-Sep-17 10:55am

You need to keep track of every change. The sensible way of doing this is to update the database every time an item is added to or deleted from the list view. Do not wait for the user to click a button.

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RickZeeland · Accepted Answer · 2017-09-05T07:20:00

Solution 1

I think you can better use a DataGridView, then you can make use of the IsCurrentRowDirty property.

If you want to stick to the ListView, just create a copy of the ListView e.g. named lvSelectedItemsOld, and compare that to the lvSelectedItems by using a for loop to cycle through all rows.

Posted 5-Sep-17 7:20am

RickZeeland

Updated 5-Sep-17 7:30am

v2

Comments

.dot IT Solutions 5-Sep-17 13:23pm

Thank you for your reply. All the things are already designed and lots of codes has been written. Now can't change the ListView or Form. Please give me a solution.