CODEWITHSUNDEEP
c#linqupdates
prog_prog
prog_prog

Reputation: 391

Update member in class using LINQ

I have a class with 5 members. like that:

class Demo
{
    public int id;
    public string name;
    public string color;
    public int 4th_member;
    public int 5th_member;
}

I have list of this class.

for the 4th_member, and 5th_member, I have 2 list of dictionary with int key and int value. (one for 4th, and the second for 5th)

I want to update these members, according to the dictionary. like, if dictionary's key = id, then update 4th_member to be value of Dictionary.

I hope my question is clear enough.

Upvotes: 0

Views: 260

Answers (2)

Sathish
Sathish

Reputation: 2099

I tested the below code its working fine.

Hope this will solve your problem if I have understood your question properly

var demo = demoTest.Select(s =>
           {
            s.Fourthth_member = dic.GetValueFromDictonary(s.Fourthth_member);
            s.Fifthth_member = dic1.GetValueFromDictonary(s.Fifthth_member);
            return s;
          }).ToList();

//Extension method
public static class extMethod
{
  public static int GetValueFromDictonary(this Dictionary<int, int> dic, int key)
    {
        int value = 0;

        dic.TryGetValue(key, out value);

        return value;
    }
}

Upvotes: 1

Gilad Green
Gilad Green

Reputation: 37299

linq is not used for updating data but for queries. This is a possible solution:

foreach(var demo in demoList)
{
    if(dictionaries[0].ContainsKey(demo.id))
    {
        demo.member4 = dictionaries[0][demo.id];
    }

    if (dictionaries[1].ContainsKey(demo.id))
    {
        demo.member5 = dictionaries[1][demo.id];
    }
}

Or with the TryGetValue

foreach(var demo in demoList)
{
    int value;
    if(dictionaries[0].TryGetValue(demo.id, out value))
    {
        demo.member4 = value;
    }

    if (dictionaries[1].TryGetValue(demo.id, out value))
    {
        demo.member5 = value;
    }
}

Upvotes: 1

Related Questions