Select a row in listview

Question

I am web developer , working on a part of my project developed in WinForms. So my question could be a basic one. Try to bear with it.

I have two list views on my page and a remove button that works for both.

Problems.

1. I am not able to select a row in both the list view when I run my program, may be some property needed for it?
2. If I am able to select the row I want to detect which list view item has been selected, so how would I do that?

3. I have three columns and have bound the data by using the code below.

       listView1.Columns.Add("ID",20);
       listView1.Columns.Add("Name",40);
       listView1.Columns.Add("Mobile",40);
   
   
       foreach (var item in dataList)
       {
           newItem = new ListViewItem();
           newItem.SubItems.Add(item.ID.ToString());
           newItem.SubItems.Add(item.Name);
           newItem.SubItems.Add(item.Mobile.ToString());
           listView1.Items.Add(newItem);   
       }
   

but the ID column is left blank and the data starts to bind in these sense.

ID Name Mobile
   1    abc
   2    xyz

So how do I properly show the data?

4. Lastly I want to use my ID column to delete the data. So if I give width=0, is this the best way to hide a column?

Caernarvonshire

Answer 1

1. See ListView.FullRowSelect property.
2. See ListView.SelectedItems property. Note, that by default ListView allows multiselection.
3. Set item text via constructor: newItem = new ListViewItem(item.ID.ToString());, then add rest of subitems (except of item.ID).
4. If you want to delete the column, just remove it from the columns collection.

Hauck

thanks for your answer. point no 1,3 has been resolved.on point no 2. i need some inputs , this is what I am doing if(listView1.SelectedItems.Count > 0) { foreach (var item in listView1.SelectedItems) { //how to extract the value of hidden column ie.ID //multi select option is set to be false } } – Caernarvonshire

@ankur: do not store value, which you don't want to display in view item. If you just want to use item.ID later without displaying it, bind ListViewItem with data item: newItem.Tag = item. Later you can get it with ((YourDataItemType)item.Tag).ID. – Hauck

the approach with tags was pretty gud, but i am not able to get the value. also I have gone through lot of examples of deleting the selected row with multiple columns nothing seems to do the trick. the id that I have kept hidden was actually used for same thing. so can you help me on this my code on delete button.foreach (ListViewItem item in listView2.SelectedItems) { var id = ((int)item.Tag).ID;// this line give error listView2.Items.Remove(item); } – Caernarvonshire

@ankur: I'm confusing about what do you want to achieve. Do you want to delete selected items? If so, why don't you just remove them from items collection? – Hauck

I want to remove the selected row from the list-view as well delete the same row from database. so for achieving the latter one I need the id of the selected row that I have kept in "tag". I have wrote the code of removing the selected row only thing is I want the tag value of selected item ie "ID". – Caernarvonshire

@ankur: I see. If you will put in Tag value of item.ID (newItem.Tag = item.ID), then you could get it back such a way: var id = (int)item.Tag; If you will put the whole data item (newItem.Tag = item), then you could get ID this way: ((YourDataItemType)item.Tag).ID, where YourDataItemType is a type of data item object, not a type of any of its properties. – Hauck

Answer 2

Set listView1.Items[index].Selected=true;

Prudie

Welcome to SO. Be cautious about answering 8 year old questions which have confirmed answers. If your answer truely adds value (like a recent update to APIs), go for it but otherwise, best to leave them answered as-is. – Target