For help on two lis collection merge to heavy-CodePudding

List BsonList=new List (a);
List List=new List (a);

//merge
BsonList=bsonList. Concat (list). ToList ();

Assumes that the entity class
The inside of the BsonDocument project for
Id
Code
Codename
When the
Id and code phase at the same time, keep only one, and how to implement the

CodePudding user response:

 
//Lambda expressions to heavy method: 
BsonList. Where (x, I)=& gt; BosonList. FindIndex (z=& gt; Z.i d==x.i d and z.c ode==x.c ode)==I);

CodePudding user response:

reference 1st floor morliz son hin reply:

 
//Lambda expressions to heavy method: 
BsonList. Where (x, I)=& gt; BosonList. FindIndex (z=& gt; Z.i d==x.i d and z.c ode==x.c ode)==I);

To solve the VB.net ` how to write

CodePudding user response:

You this question, proposed the heel brain teasers,
VB.NET I don't often play, I remember the VB can only use the ArrayList set to heavy,

And generic set, there is no direct way, to do type conversion processing,

CodePudding user response:

reference 1st floor morliz son hin reply:

 
//Lambda expressions to heavy method: 
BsonList. Where (x, I)=& gt; BosonList. FindIndex (z=& gt; Z.i d==x.i d and z.c ode==x.c ode)==I);

Seemingly parentheses number not to

CodePudding user response:

Merge to weight is actually and set
Please use the Union method and set

CodePudding user response:

Our problem is, of course, keep a???? Keep what?? According to the average person thinking with my new and old and retain new right

I give an example of course written in c #, I don't ask me to vb.net, more than 10 years don't write vb.net grammar forget

 public class test 
{
Public string id {get; set; } 

Public string name {get; set; } 
} 

The public class test comparator: IEqualityComparer 
{
Public Boolean Equals (x test, the test y) 
{
Return x.i d.E quals y.i (d); 
} 

Public int GetHashCode (test obj) 
{
Return obj. Id. GetHashCode (); 
} 
} 

List LstA=new List (a); 
LstA. Add (new test () 
{
Id="1" and name="1" 
}); 
LstA. Add (new test () 
{
Id="2", 
Name="2", "
}); 

List LstB=new List (a); 
LstB. Add (new test () 
{
Id="1", 
Name="2", "
}); 
LstB. Add (new test () 
{
Id="3", 
Name="3" 
}); 

Var res=lstB. Union (lstA, new test comparator ()). The ToList ();

CodePudding user response:

Need to use vb version of converting a
https://converter.telerik.com/

 
Using System. Collections. Generic; 
Using System. Diagnostics; 
Using System. Linq; 

The namespace ConsoleApp1 
{
Class Program 
{
The static void Main 
(
String [] args 
) 
{
List BsonList=new List () 
{
New BsonDocument () 
{
Id="1", 
Code=No. 1 ", "
Codename="* *" 
}, 
New BsonDocument () 
{
Id="2", 
Code=No. 2 ", "
Codename="bill" 
}, 
New BsonDocument () 
{
Id="3", 
Code="No. 3," 
Codename="detective" 
}, 
}; 

List List=new List () 
{
New BsonDocument () 
{
Id="1", 
Code=No. 1 ", "
Codename="* *" 
}, 
New BsonDocument () 
{
Id="2", 
Code=No. 2 ", "
Codename="Li Er egg" 
}, 
New BsonDocument () 
{
Id="3", 
Code="No. 3," 
Codename="king second" 
}, 
New BsonDocument () 
{
Id="4", 
Code="No. 4," 
Codename="Wu Tiezhu" 
}, 
}; 


Var result=bsonList 
Concat (list) 
Distinct (new BsonDocumentComparer ()); 

The foreach (var bsonDocument result in) 
{
The Debug. Print ($id: "{bsonDocument. Id} \ tcode: {bsonDocument. Code} \ tCodename: {bsonDocument. Codename} \ t"); 
} 
} 
} 

The class BsonDocument 
{
Public string Id {get; set; } 
Public string Code {get; set; } 
Public string Codename {get; set; } 
} 

The class BsonDocumentComparer: IEqualityComparer 
{
Public Boolean Equals 
(
BsonDocument x, 
BsonDocument y 
) 
{
Return x.I d==y.I d & amp; & 
X.C ode==y.C ode; 
} 

Public int GetHashCode 
(
BsonDocument obj 
) 
{
Unchecked 
{
Var hashCode=(obj Id!=null? Obj. Id. GetHashCode () : 0); 
HashCode=(hashCode * 397) ^ (obj Code!=null? Obj. Code. GetHashCode () : 0); 
Return hashCode; 
} 
} 
} 
}

Output:
Id: 1 code: No. 1 Codename: zhang
Id: 2 code: No. 2 Codename: li si
Id: 3 code: No. 3 Codename: fifty
Id: 4 code: No. 4 Codename: Wu Tiezhu