How to Compare Values of Two Dictionary and Increment Count if DictA key,values Exists in DictB?

Question

I have Two Dictionary DictA & DictB such as:

Dictionary<int, string> DictA = new Dictionary<int, string>();
DicA.add(1,"Mango");
DicA.add(2,"Grapes");
DicA.add(3,"Orange");

Dictionary<int, string> DictB = new Dictionary<int, string>();
DicB.add(1,"Mango");
DicB.add(2,"Pineapple");

How to Compare the values of these Two Dictionary DictA key,value with DictB key,value and if MATCH IS FOUND then INCREMENT the COUNTER variable.

Note: DicA may Contains many Rows as compared to DicB EG: DicA has 3 Rows and DicB has 2 Rows. If DicA key,value match(similar/equal) to DicB key,val then increment the counter variable by one!

Any Suggestion..! Help Appreciated...!

What does "match is found" mean? Same key maps to same value? — Jon, Jun 26 '12 at 13:20
See http://stackoverflow.com/questions/3928822/comparing-2-dictionarystring-string-instances — Sam Leach, Jun 26 '12 at 13:24
Sorry @Jon for incomplete information...nw have edited...! plz Reply...! — SHEKHAR SHETE, Jun 26 '12 at 13:29
@SHEKHARSHETE: "similar/equal" is still not good enough. What do you consider "similar"? — Jon, Jun 26 '12 at 13:31
objects in dict could be reference types in that case equal and similar are two different things. — Shoaib Shaikh, Jun 26 '12 at 13:32
Dear @Jon..! i mean to say EXACT EQUAL key,Value pairs...! Posted with Example...! @Adam Solved my problem...! Thanks to u too....! I Dont know why people are EAGER to DOWN VOTE...? — SHEKHAR SHETE, Jun 26 '12 at 13:43
The code in your post will not work. You are creating a dictionary `DictA` but adding keys/values to `DicA`. — dtsg, Jun 26 '12 at 14:08

score 3 · Answer 1 · answered Jun 26 '12 at 13:30

3

Use this code:

int matches = DictA.Keys.Where(k => DictB.ContainsKey(k) && DictB[k] == DictA[k]).Count();

answered Jun 26 '12 at 13:30

Adam

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dtsg · Accepted Answer · 2012-06-26T13:49:49.050

1

You could use:

Dictionary<int, string> DicA = new Dictionary<int, string>();
DicA.Add(1,"Mango");
DicA.Add(2,"Grapes");
DicA.Add(3,"Orange");

Dictionary<int, string> DicB = new Dictionary<int, string>();
DicB.Add(1,"Mango");
DicB.Add(2,"Pineapple");

int counter = 0;

foreach (var pair in DicA)
{
     string value;

     if (DicB.TryGetValue(pair.Key, out value))
     {
          if (value == pair.Value)
          {
                counter++;
          }
     }
}

edited Jun 26 '12 at 13:49

answered Jun 26 '12 at 13:33

dtsg

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It compiles fine for me, i'm guessing you just cut and pasted it without checking variable names... But yes @SamLeach, value should be a string. – dtsg Jun 26 '12 at 13:49
just i want to inform you that it gives error dont misunderstand..! – SHEKHAR SHETE Jun 26 '12 at 14:04
What specific error does it throw? I ran this exact code on my machine and the value of `counter` returns `1` as expected. – dtsg Jun 26 '12 at 14:05
you have edited your code ur previous code is: foreach (var pair in DictA) { int value; if (DictB.TryGetValue(pair.Key, out value)) { if (value == pair.Value) { counter++; } } } – SHEKHAR SHETE Jun 26 '12 at 14:11
Yes, I know. @SamLeach kindly pointed out that `value` should be a string. – dtsg Jun 26 '12 at 14:12

How to Compare Values of Two Dictionary and Increment Count if DictA key,values Exists in DictB?

2 Answers2