Solved

How to check if a list contains items? c#

Posted on 2009-05-08
6
2,074 Views
Last Modified: 2012-05-06
HI all,

I have a list wich I need to check if it contains any items or not. If it does not I need to show a warning that it has to have at least one item.

How to check this?
Probably pretty simple but can't seem to find it right now...

Grts
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Question by:Pit76
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6 Comments
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 24335948

List<string> someList = new List<string>();
 
someList.Count > 0

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LVL 12

Accepted Solution

by:
wht1986 earned 500 total points
ID: 24335991
You did say what kind of list you are referring to so here are a couple of examples

List<string> list1 = new List<string>();
if (list1.Count == 0) { /* Display Error */ }

string[] list2 = new string[] { "", "", "" };
if (list2.Length == 0) { /* Display Error */ }

ListBox lb = new ListBox();
if (lb.Items.Count == 0) { /* Display Error */ }
0
 

Author Comment

by:Pit76
ID: 24336039
Hi,

Indeed I forgot to tell that. It's the first one.
Thought it was going to be simple, about the same as checking if a DataSet has rows...

Anyway thx for putting my nose on it :)

Grts
0
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Author Closing Comment

by:Pit76
ID: 31579432
Thx :)
0
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 24336062
Wow...  I don't even know what to say.
0
 

Author Comment

by:Pit76
ID: 24339711
Yeah I know sry.
 I should have split the points but tbh I looked over your answer, as stupid as it may sound...

You've helped me before so I feel a little bad about it...

Greetings.

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