Linq on nested Dictionary
0
I have a dictionary of dictionary and I want to find a value from inner dictionary by Linq .
My code is:
private Dictionary<string, Dictionary<int, string>> SubCategoryDictionary = new Dictionary<string, Dictionary<int, string>>();
private Dictionary<int, string> BGA_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> Lead3D_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> Lead2D_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> Leadless_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> PIC_Dictionary = new Dictionary<int, string>();
In my constructor I have all values like this:--
BGA_Dictionary.Add(1, "Body_Measurement");
BGA_Dictionary.Add(2, "Ball_Measurement");
SubCategoryDictionary.Add("BGA", BGA_Dictionary);
Lead3D_Dictionary.Add(1, "Component_Height");
Lead3D_Dictionary.Add(2, "Rib_Measurement");
SubCategoryDictionary.Add("Package", Lead3D_Dictionary);
Lead2D_Dictionary.Add(1, "Dirt_Inspection");
Lead2D_Dictionary.Add(2, "Half_Cut_Inspection");
SubCategoryDictionary.Add("Mark", Lead2D_Dictionary);
Now I need a Lambda expression which will give me something like :
when key of SubCategoryDictionary ="Mark" and key of Lead3D_Dictionary =2 then I should get "Rib_Measurement".
I tried with following code :
string q = (from cls in SubCategoryDictionary
from s in cls.Value
where cls.Key == "Mark" && s.Key == 3
select s.Value).FirstOrDefault();
foreach (var a in q)
{
}
This above code works but I need in lambda expression. So if someone help me in formation of Lambda formation. It will be of great help.
Thanks.
c# .net linq
asked Nov 15 '18 at 3:45
New ProgrammerNew Programmer
102
add a comment |
0
I have a dictionary of dictionary and I want to find a value from inner dictionary by Linq .
My code is:
private Dictionary<string, Dictionary<int, string>> SubCategoryDictionary = new Dictionary<string, Dictionary<int, string>>();
private Dictionary<int, string> BGA_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> Lead3D_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> Lead2D_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> Leadless_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> PIC_Dictionary = new Dictionary<int, string>();
In my constructor I have all values like this:--
BGA_Dictionary.Add(1, "Body_Measurement");
BGA_Dictionary.Add(2, "Ball_Measurement");
SubCategoryDictionary.Add("BGA", BGA_Dictionary);
Lead3D_Dictionary.Add(1, "Component_Height");
Lead3D_Dictionary.Add(2, "Rib_Measurement");
SubCategoryDictionary.Add("Package", Lead3D_Dictionary);
Lead2D_Dictionary.Add(1, "Dirt_Inspection");
Lead2D_Dictionary.Add(2, "Half_Cut_Inspection");
SubCategoryDictionary.Add("Mark", Lead2D_Dictionary);
Now I need a Lambda expression which will give me something like :
when key of SubCategoryDictionary ="Mark" and key of Lead3D_Dictionary =2 then I should get "Rib_Measurement".
I tried with following code :
string q = (from cls in SubCategoryDictionary
from s in cls.Value
where cls.Key == "Mark" && s.Key == 3
select s.Value).FirstOrDefault();
foreach (var a in q)
{
}
This above code works but I need in lambda expression. So if someone help me in formation of Lambda formation. It will be of great help.
Thanks.
c# .net linq
asked Nov 15 '18 at 3:45
New ProgrammerNew Programmer
102
3
are you talking aboutSubCategoryDictionary["Mark"][2]?
– vasily.sib
Nov 15 '18 at 3:54
@vasily.sib I was trying like string q = (from cls in SubCategoryDictionary from s in cls.Value where cls.Key == "Mark" && s.Key == 3 select s.Value).FirstOrDefault(); and this gives me result. Just can not form a Lambda expression out of this. Could you please help me on Lambda formation.
– New Programmer
Nov 15 '18 at 4:45
your linq is just accessing single element by keys. Why do you ever think you need a lambda for this? Anyway, here it is:Func<string,int,string> lambda = (k1, k2) => SubCategoryDictionary[k1][k2];
– vasily.sib
Nov 15 '18 at 11:20
@vasily.sib how to mark your answer as the answer . Thanks for this . please post it in answer section. thanks a lot.
– New Programmer
Nov 16 '18 at 4:27
add a comment |
0
0
0
I have a dictionary of dictionary and I want to find a value from inner dictionary by Linq .
My code is:
private Dictionary<string, Dictionary<int, string>> SubCategoryDictionary = new Dictionary<string, Dictionary<int, string>>();
private Dictionary<int, string> BGA_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> Lead3D_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> Lead2D_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> Leadless_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> PIC_Dictionary = new Dictionary<int, string>();
In my constructor I have all values like this:--
BGA_Dictionary.Add(1, "Body_Measurement");
BGA_Dictionary.Add(2, "Ball_Measurement");
SubCategoryDictionary.Add("BGA", BGA_Dictionary);
Lead3D_Dictionary.Add(1, "Component_Height");
Lead3D_Dictionary.Add(2, "Rib_Measurement");
SubCategoryDictionary.Add("Package", Lead3D_Dictionary);
Lead2D_Dictionary.Add(1, "Dirt_Inspection");
Lead2D_Dictionary.Add(2, "Half_Cut_Inspection");
SubCategoryDictionary.Add("Mark", Lead2D_Dictionary);
Now I need a Lambda expression which will give me something like :
when key of SubCategoryDictionary ="Mark" and key of Lead3D_Dictionary =2 then I should get "Rib_Measurement".
I tried with following code :
string q = (from cls in SubCategoryDictionary
from s in cls.Value
where cls.Key == "Mark" && s.Key == 3
select s.Value).FirstOrDefault();
foreach (var a in q)
{
}
This above code works but I need in lambda expression. So if someone help me in formation of Lambda formation. It will be of great help.
Thanks.
c# .net linq
asked Nov 15 '18 at 3:45
New ProgrammerNew Programmer
102
I have a dictionary of dictionary and I want to find a value from inner dictionary by Linq .
My code is:
private Dictionary<string, Dictionary<int, string>> SubCategoryDictionary = new Dictionary<string, Dictionary<int, string>>();
private Dictionary<int, string> BGA_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> Lead3D_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> Lead2D_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> Leadless_Dictionary = new Dictionary<int, string>();
private Dictionary<int, string> PIC_Dictionary = new Dictionary<int, string>();
In my constructor I have all values like this:--
BGA_Dictionary.Add(1, "Body_Measurement");
BGA_Dictionary.Add(2, "Ball_Measurement");
SubCategoryDictionary.Add("BGA", BGA_Dictionary);
Lead3D_Dictionary.Add(1, "Component_Height");
Lead3D_Dictionary.Add(2, "Rib_Measurement");
SubCategoryDictionary.Add("Package", Lead3D_Dictionary);
Lead2D_Dictionary.Add(1, "Dirt_Inspection");
Lead2D_Dictionary.Add(2, "Half_Cut_Inspection");
SubCategoryDictionary.Add("Mark", Lead2D_Dictionary);
Now I need a Lambda expression which will give me something like :
when key of SubCategoryDictionary ="Mark" and key of Lead3D_Dictionary =2 then I should get "Rib_Measurement".
I tried with following code :
string q = (from cls in SubCategoryDictionary
from s in cls.Value
where cls.Key == "Mark" && s.Key == 3
select s.Value).FirstOrDefault();
foreach (var a in q)
{
}
This above code works but I need in lambda expression. So if someone help me in formation of Lambda formation. It will be of great help.
Thanks.
c# .net linq
c# .net linq
asked Nov 15 '18 at 3:45
New ProgrammerNew Programmer
102
asked Nov 15 '18 at 3:45
New ProgrammerNew Programmer
102
edited Nov 15 '18 at 4:50
New Programmer
asked Nov 15 '18 at 3:45
New ProgrammerNew Programmer
102
asked Nov 15 '18 at 3:45
New ProgrammerNew Programmer
102
asked Nov 15 '18 at 3:45
New ProgrammerNew Programmer
102
102
3
are you talking aboutSubCategoryDictionary["Mark"][2]?
– vasily.sib
Nov 15 '18 at 3:54
@vasily.sib I was trying like string q = (from cls in SubCategoryDictionary from s in cls.Value where cls.Key == "Mark" && s.Key == 3 select s.Value).FirstOrDefault(); and this gives me result. Just can not form a Lambda expression out of this. Could you please help me on Lambda formation.
– New Programmer
Nov 15 '18 at 4:45
your linq is just accessing single element by keys. Why do you ever think you need a lambda for this? Anyway, here it is:Func<string,int,string> lambda = (k1, k2) => SubCategoryDictionary[k1][k2];
– vasily.sib
Nov 15 '18 at 11:20
@vasily.sib how to mark your answer as the answer . Thanks for this . please post it in answer section. thanks a lot.
– New Programmer
Nov 16 '18 at 4:27
add a comment |
3
are you talking aboutSubCategoryDictionary["Mark"][2]?
– vasily.sib
Nov 15 '18 at 3:54
@vasily.sib I was trying like string q = (from cls in SubCategoryDictionary from s in cls.Value where cls.Key == "Mark" && s.Key == 3 select s.Value).FirstOrDefault(); and this gives me result. Just can not form a Lambda expression out of this. Could you please help me on Lambda formation.
– New Programmer
Nov 15 '18 at 4:45
your linq is just accessing single element by keys. Why do you ever think you need a lambda for this? Anyway, here it is:Func<string,int,string> lambda = (k1, k2) => SubCategoryDictionary[k1][k2];
– vasily.sib
Nov 15 '18 at 11:20
@vasily.sib how to mark your answer as the answer . Thanks for this . please post it in answer section. thanks a lot.
– New Programmer
Nov 16 '18 at 4:27
3
3
are you talking about
SubCategoryDictionary["Mark"][2]?– vasily.sib
Nov 15 '18 at 3:54
are you talking about
SubCategoryDictionary["Mark"][2]?– vasily.sib
Nov 15 '18 at 3:54
@vasily.sib I was trying like string q = (from cls in SubCategoryDictionary from s in cls.Value where cls.Key == "Mark" && s.Key == 3 select s.Value).FirstOrDefault(); and this gives me result. Just can not form a Lambda expression out of this. Could you please help me on Lambda formation.
– New Programmer
Nov 15 '18 at 4:45
@vasily.sib I was trying like string q = (from cls in SubCategoryDictionary from s in cls.Value where cls.Key == "Mark" && s.Key == 3 select s.Value).FirstOrDefault(); and this gives me result. Just can not form a Lambda expression out of this. Could you please help me on Lambda formation.
– New Programmer
Nov 15 '18 at 4:45
your linq is just accessing single element by keys. Why do you ever think you need a lambda for this? Anyway, here it is:
Func<string,int,string> lambda = (k1, k2) => SubCategoryDictionary[k1][k2];– vasily.sib
Nov 15 '18 at 11:20
your linq is just accessing single element by keys. Why do you ever think you need a lambda for this? Anyway, here it is:
Func<string,int,string> lambda = (k1, k2) => SubCategoryDictionary[k1][k2];– vasily.sib
Nov 15 '18 at 11:20
@vasily.sib how to mark your answer as the answer . Thanks for this . please post it in answer section. thanks a lot.
– New Programmer
Nov 16 '18 at 4:27
@vasily.sib how to mark your answer as the answer . Thanks for this . please post it in answer section. thanks a lot.
– New Programmer
Nov 16 '18 at 4:27
add a comment |
2 Answers
2
active
oldest
votes
0
I'm not sure why you ever need a lambda for accessing a dictionary by keys, but here it is:
Func<string,int,string> lambda = (k1, k2) => SubCategoryDictionary[k1][k2];
Now you can invoke it with var subCategory = lambda("Mark", 2);
answered Nov 16 '18 at 8:11
vasily.sibvasily.sib
2,21821021
add a comment |
-1
I guess below code should get you the value you are trying to get.
var lead3 = SubCategoryDictionary["Mark"].SingleOrDefault(x => x.Key == 2).Value;
The idea is to use the Key of the first dictionary and get the value of it than filter it with SingleOrDefault method by providing a key to the inner dictionary value you are interested in.
Hope this helps
answered Nov 15 '18 at 4:19
Farrukh ManzoorFarrukh Manzoor
493
Why useSingleOrDefault?
– mjwills
Nov 15 '18 at 4:25
@Farrukh Manzoor you have mentioned SubCategoryDictionary["Mark"] which is not linq . I was trying something like string q = (from cls in SubCategoryDictionary from s in cls.Value where cls.Key == "Mark" && s.Key == 3 select s.Value).FirstOrDefault(); it is giving me output when I iterate over foreach but I need in a Lambda format way
– New Programmer
Nov 15 '18 at 4:43
@NewProgrammer Using LINQ to do a lookup on aDictionaryis foolhardy. ADictionaryis incredibly good at key lookups. Let it do its job. When I want to drive somewhere, I don't get the kids in the card and then push the car. No, I drive it - because that is what it is good at.
– mjwills
Nov 15 '18 at 5:16
@mjwills nice comment . will follow.
– New Programmer
Nov 15 '18 at 5:34
add a comment |
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2 Answers
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2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
I'm not sure why you ever need a lambda for accessing a dictionary by keys, but here it is:
Func<string,int,string> lambda = (k1, k2) => SubCategoryDictionary[k1][k2];
Now you can invoke it with var subCategory = lambda("Mark", 2);
answered Nov 16 '18 at 8:11
vasily.sibvasily.sib
2,21821021
add a comment |
0
I'm not sure why you ever need a lambda for accessing a dictionary by keys, but here it is:
Func<string,int,string> lambda = (k1, k2) => SubCategoryDictionary[k1][k2];
Now you can invoke it with var subCategory = lambda("Mark", 2);
answered Nov 16 '18 at 8:11
vasily.sibvasily.sib
2,21821021
add a comment |
0
0
0
I'm not sure why you ever need a lambda for accessing a dictionary by keys, but here it is:
Func<string,int,string> lambda = (k1, k2) => SubCategoryDictionary[k1][k2];
Now you can invoke it with var subCategory = lambda("Mark", 2);
answered Nov 16 '18 at 8:11
vasily.sibvasily.sib
2,21821021
I'm not sure why you ever need a lambda for accessing a dictionary by keys, but here it is:
Func<string,int,string> lambda = (k1, k2) => SubCategoryDictionary[k1][k2];
Now you can invoke it with var subCategory = lambda("Mark", 2);
answered Nov 16 '18 at 8:11
vasily.sibvasily.sib
2,21821021
answered Nov 16 '18 at 8:11
vasily.sibvasily.sib
2,21821021
answered Nov 16 '18 at 8:11
vasily.sibvasily.sib
2,21821021
answered Nov 16 '18 at 8:11
vasily.sibvasily.sib
2,21821021
2,21821021
add a comment |
add a comment |
-1
I guess below code should get you the value you are trying to get.
var lead3 = SubCategoryDictionary["Mark"].SingleOrDefault(x => x.Key == 2).Value;
The idea is to use the Key of the first dictionary and get the value of it than filter it with SingleOrDefault method by providing a key to the inner dictionary value you are interested in.
Hope this helps
answered Nov 15 '18 at 4:19
Farrukh ManzoorFarrukh Manzoor
493
Why useSingleOrDefault?
– mjwills
Nov 15 '18 at 4:25
@Farrukh Manzoor you have mentioned SubCategoryDictionary["Mark"] which is not linq . I was trying something like string q = (from cls in SubCategoryDictionary from s in cls.Value where cls.Key == "Mark" && s.Key == 3 select s.Value).FirstOrDefault(); it is giving me output when I iterate over foreach but I need in a Lambda format way
– New Programmer
Nov 15 '18 at 4:43
@NewProgrammer Using LINQ to do a lookup on aDictionaryis foolhardy. ADictionaryis incredibly good at key lookups. Let it do its job. When I want to drive somewhere, I don't get the kids in the card and then push the car. No, I drive it - because that is what it is good at.
– mjwills
Nov 15 '18 at 5:16
@mjwills nice comment . will follow.
– New Programmer
Nov 15 '18 at 5:34
add a comment |
-1
I guess below code should get you the value you are trying to get.
var lead3 = SubCategoryDictionary["Mark"].SingleOrDefault(x => x.Key == 2).Value;
The idea is to use the Key of the first dictionary and get the value of it than filter it with SingleOrDefault method by providing a key to the inner dictionary value you are interested in.
Hope this helps
answered Nov 15 '18 at 4:19
Farrukh ManzoorFarrukh Manzoor
493
Why useSingleOrDefault?
– mjwills
Nov 15 '18 at 4:25
@Farrukh Manzoor you have mentioned SubCategoryDictionary["Mark"] which is not linq . I was trying something like string q = (from cls in SubCategoryDictionary from s in cls.Value where cls.Key == "Mark" && s.Key == 3 select s.Value).FirstOrDefault(); it is giving me output when I iterate over foreach but I need in a Lambda format way
– New Programmer
Nov 15 '18 at 4:43
@NewProgrammer Using LINQ to do a lookup on aDictionaryis foolhardy. ADictionaryis incredibly good at key lookups. Let it do its job. When I want to drive somewhere, I don't get the kids in the card and then push the car. No, I drive it - because that is what it is good at.
– mjwills
Nov 15 '18 at 5:16
@mjwills nice comment . will follow.
– New Programmer
Nov 15 '18 at 5:34
add a comment |
-1
-1
-1
I guess below code should get you the value you are trying to get.
var lead3 = SubCategoryDictionary["Mark"].SingleOrDefault(x => x.Key == 2).Value;
The idea is to use the Key of the first dictionary and get the value of it than filter it with SingleOrDefault method by providing a key to the inner dictionary value you are interested in.
Hope this helps
answered Nov 15 '18 at 4:19
Farrukh ManzoorFarrukh Manzoor
493
I guess below code should get you the value you are trying to get.
var lead3 = SubCategoryDictionary["Mark"].SingleOrDefault(x => x.Key == 2).Value;
The idea is to use the Key of the first dictionary and get the value of it than filter it with SingleOrDefault method by providing a key to the inner dictionary value you are interested in.
Hope this helps
answered Nov 15 '18 at 4:19
Farrukh ManzoorFarrukh Manzoor
493
answered Nov 15 '18 at 4:19
Farrukh ManzoorFarrukh Manzoor
493
answered Nov 15 '18 at 4:19
Farrukh ManzoorFarrukh Manzoor
493
answered Nov 15 '18 at 4:19
Farrukh ManzoorFarrukh Manzoor
493
493
Why useSingleOrDefault?
– mjwills
Nov 15 '18 at 4:25
@Farrukh Manzoor you have mentioned SubCategoryDictionary["Mark"] which is not linq . I was trying something like string q = (from cls in SubCategoryDictionary from s in cls.Value where cls.Key == "Mark" && s.Key == 3 select s.Value).FirstOrDefault(); it is giving me output when I iterate over foreach but I need in a Lambda format way
– New Programmer
Nov 15 '18 at 4:43
@NewProgrammer Using LINQ to do a lookup on aDictionaryis foolhardy. ADictionaryis incredibly good at key lookups. Let it do its job. When I want to drive somewhere, I don't get the kids in the card and then push the car. No, I drive it - because that is what it is good at.
– mjwills
Nov 15 '18 at 5:16
@mjwills nice comment . will follow.
– New Programmer
Nov 15 '18 at 5:34
add a comment |
Why useSingleOrDefault?
– mjwills
Nov 15 '18 at 4:25
@Farrukh Manzoor you have mentioned SubCategoryDictionary["Mark"] which is not linq . I was trying something like string q = (from cls in SubCategoryDictionary from s in cls.Value where cls.Key == "Mark" && s.Key == 3 select s.Value).FirstOrDefault(); it is giving me output when I iterate over foreach but I need in a Lambda format way
– New Programmer
Nov 15 '18 at 4:43
@NewProgrammer Using LINQ to do a lookup on aDictionaryis foolhardy. ADictionaryis incredibly good at key lookups. Let it do its job. When I want to drive somewhere, I don't get the kids in the card and then push the car. No, I drive it - because that is what it is good at.
– mjwills
Nov 15 '18 at 5:16
@mjwills nice comment . will follow.
– New Programmer
Nov 15 '18 at 5:34
Why use
SingleOrDefault?– mjwills
Nov 15 '18 at 4:25
Why use
SingleOrDefault?– mjwills
Nov 15 '18 at 4:25
@Farrukh Manzoor you have mentioned SubCategoryDictionary["Mark"] which is not linq . I was trying something like string q = (from cls in SubCategoryDictionary from s in cls.Value where cls.Key == "Mark" && s.Key == 3 select s.Value).FirstOrDefault(); it is giving me output when I iterate over foreach but I need in a Lambda format way
– New Programmer
Nov 15 '18 at 4:43
@Farrukh Manzoor you have mentioned SubCategoryDictionary["Mark"] which is not linq . I was trying something like string q = (from cls in SubCategoryDictionary from s in cls.Value where cls.Key == "Mark" && s.Key == 3 select s.Value).FirstOrDefault(); it is giving me output when I iterate over foreach but I need in a Lambda format way
– New Programmer
Nov 15 '18 at 4:43
@NewProgrammer Using LINQ to do a lookup on a
Dictionary is foolhardy. A Dictionary is incredibly good at key lookups. Let it do its job. When I want to drive somewhere, I don't get the kids in the card and then push the car. No, I drive it - because that is what it is good at.– mjwills
Nov 15 '18 at 5:16
@NewProgrammer Using LINQ to do a lookup on a
Dictionary is foolhardy. A Dictionary is incredibly good at key lookups. Let it do its job. When I want to drive somewhere, I don't get the kids in the card and then push the car. No, I drive it - because that is what it is good at.– mjwills
Nov 15 '18 at 5:16
@mjwills nice comment . will follow.
– New Programmer
Nov 15 '18 at 5:34
@mjwills nice comment . will follow.
– New Programmer
Nov 15 '18 at 5:34
add a comment |
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3
are you talking about
SubCategoryDictionary["Mark"][2]?– vasily.sib
Nov 15 '18 at 3:54
@vasily.sib I was trying like string q = (from cls in SubCategoryDictionary from s in cls.Value where cls.Key == "Mark" && s.Key == 3 select s.Value).FirstOrDefault(); and this gives me result. Just can not form a Lambda expression out of this. Could you please help me on Lambda formation.
– New Programmer
Nov 15 '18 at 4:45
your linq is just accessing single element by keys. Why do you ever think you need a lambda for this? Anyway, here it is:
Func<string,int,string> lambda = (k1, k2) => SubCategoryDictionary[k1][k2];– vasily.sib
Nov 15 '18 at 11:20
@vasily.sib how to mark your answer as the answer . Thanks for this . please post it in answer section. thanks a lot.
– New Programmer
Nov 16 '18 at 4:27