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LINQ HELP

David Smith

I need some LINQ help.

I have an object (TreeNodeCollection) that contains an object (Nodes), also of type TreeNodeCollection. I wish to know how many of those sub-nodes have a count of not equal to zero. Below is the code I am using. There should be a better way to get the count other than selecting all the items and using the Count function. Can you help?

var a = from TreeNode x in nodes where x.Nodes.Count != 0 select x;
int numTasks = a.Count();

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

David Smith14y ago
I want to turn this logic below into LINQ using one line of code below

public int countTasks(TreeNode x)
{
int taskCount = 0;
foreach(var node in x.Nodes)
{
if (node.Count > 0)

{
taskCount++;
}

}
return taskCount;
}
David Smith14y ago
TopTask1
    Task1
        test1
        test2
    Task2
        Task2.1
            test1
        test1
TopTask2
    test1

Given TopTask1.Nodes, the count should be 2 (Task1 and Task2).

Given Task2.Nodes, the count should be 1 (Task2.1, since its Nodes.Count is 1). Note that Task2.Nodes.Count == 2, but I want to exclude Task2.1 | test1 since its Nodes.Count is 0.