CODEWITHSUNDEEP
c#.netlinqdictionary
Sankar
Sankar

Reputation: 11

Get a filtered Dictionary from a Dictionary using LINQ

I have a dictionary of type (string, string) which is a list of groups and their IDs. I need the 2nd dictionary which should not have five groups (which I know). Can anyone help me in framing the select in LinQ which I can use to create this sub dictionary?

Upvotes: 0

Views: 86

Answers (3)

Larry
Larry

Reputation: 18051

I think this should to the trick:

Dictionary<string, string> myDic;

...

var badGroups = new[] { "badGroup1", "badGroup2", ... };

var my2ndDic = myDic
    .Where(e => !badGroups.Contains(e.Key))
    .ToDictionary(e => e.Key, e.Value);

I suppose what you missed was the .ToDictionary() method.

Upvotes: 0

Sameer
Sameer

Reputation: 3173

        var groups = new List<string>();
        // Fill your groups
        var yourDict = new Dictionary<string, string>();
        //fill your dict.
        var filteredDict = yourDict.Where(a => !groups.Contains(a.Key)).ToDictionary(k=>k.Key,v=>v.Value);

Upvotes: 0

Sriram Sakthivel
Sriram Sakthivel

Reputation: 73502

var myDic = new Dictionary<string,string>();
myDic.Add("1","One");
myDic.Add("2","Two");
myDic.Add("3","Three");
myDic.Add("4","Four");
//myDic.Dump();

var exclusions = new []{"2","3"};
var newDict = myDic.Where(x=> !exclusions.Contains(x.Key))
     .ToDictionary(x=> x.Key, x=> x.Value);
//newDict.Dump();

Upvotes: 1

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