c# WIQL Query to get all different Iteration Paths

Question

I'm trying to get all different Iteration Paths of our Team Project by using a wiql query.

My actual solution is the following:

I use this query

    public static readonly string IterationPathsQuery = @"SELECT [System.IterationPath] FROM workitems
        WHERE[System.WorkItemType] = 'Requirement'
        OR[System.WorkItemType] = 'Feature'";

To get all relevant WorkItems and iterate through them to get all the different Iteration Paths.

private void FillIterationPathComboBox(WorkItemStore wiStore)
{
    WorkItemCollection wiCollection = wiStore.Query(Constants.IterationPathsQuery);
    var paths = new List<string>();

    ...
    foreach (WorkItem wi in wiCollection)
    {
        ...

        if (!String.IsNullOrEmpty(wi.IterationPath) && !paths.Contains(wi.IterationPath))
        {
            paths.Add(wi.IterationPath);
        }
    }

    foreach (string path in paths)
    {
        IterationPathComboBox.Items.Add(path);
    }
}

But this solution is not with good performance. Is there a way to query only for the different Iteration Paths that are used? I already read that "distinct" is not supported, but maybe there's a way that I did not think about yet.

Do you want to get all the iteration paths in the project or just the different iteration paths for some specific work items? — Eddie Chen - MSFT

Cece Dong - MSFT Cece Dong - MSFT · Accepted Answer · 2016-08-17T09:17:37

WIQL Query is not able to filter different Iteration Paths. Here are two alternatives:

You can export the query to Excel and use Excel RemoveDuplicates Method to filter different Iteration Paths.

You can get a list of Iteration Paths, then remove Duplicates and Get Distinct records using LINQ. Check the code snippet on this website.

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;

namespace AbundantCode  
{
    internal class Program
    {
        //How to Remove Duplicates and Get Distinct records from List using LINQ ?

        private static void Main(string[] args)
        {
            List<Employee> employees = new List<Employee>()
{

new Employee { EmpID = 1 , Name ="AC"},
new Employee { EmpID = 2 , Name ="Peter"},
new Employee { EmpID = 3 , Name ="Michael"},
new Employee { EmpID = 3 , Name ="Michael"}
};

 //Gets the Distinct List
 var DistinctItems = employees.GroupBy(x => x.EmpID).Select(y => y.First());
            foreach (var item in DistinctItems)
            Console.WriteLine(item.Name);
            Console.ReadLine();
        }
    }

    public class Employee
    {
        public string Name { get; set; }
        public int EmpID { get; set; }
    }
}

c# WIQL Query to get all different Iteration Paths

1 Answers