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Q&A Update list based on presence of identifier in a second list

In C#, I have two lists and need to mark records in the first based on the second. Here's a sample: public class Vehicle { public string Make { get; set; } public string VIN { get; set;...

3 answers · posted 3y ago by FrankLuke‭ · last activity 3y ago by Andrew Shepherd‭

Question c# linq

#2: Post edited by

FrankLuke‭ · 2021-02-25T21:29:11Z (about 3 years ago)
Added backticks for code

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In C#, I have two lists and need to mark records in the first based on the second. Here's a sample:
```
public class Vehicle
{
public string Make { get; set; }
public string VIN { get; set; }
public string Color { get; set; }
public bool HasRegistration { get; set; } = false;
}
```
The second list is simply a set of VINs (List<string>) that have been registered. I need to mark all the vehicles in the List<Vehicle> which have their VIN somewhere in the List<string>. This is what I have, and it works, but I am looking for something more LINQ.
```
foreach(var v in vehicles)
{
if (vinList.Contains(v.VIN))
{
v.HasRegistration = true;
}
}
```
I could also do `v.HasRegistration = (vinList.Contains(v.VIN));`
~~Can this be done in a single LINQ statement?~~

In C#, I have two lists and need to mark records in the first based on the second. Here's a sample:
```
public class Vehicle
{
public string Make { get; set; }
public string VIN { get; set; }
public string Color { get; set; }
public bool HasRegistration { get; set; } = false;
}
```
The second list is simply a set of VINs (`List<string>`) that have been registered. I need to mark all the vehicles in the `List<Vehicle>` which have their VIN somewhere in the `List<string>`. This is what I have, and it works, but I am looking for something more LINQ.
```
foreach(var v in vehicles)
{
if (vinList.Contains(v.VIN))
{
v.HasRegistration = true;
}
}
```
I could also do `v.HasRegistration = (vinList.Contains(v.VIN));`
Can this be done in a single, LINQ statement?

c# linq

#1: Initial revision by

FrankLuke‭ · 2021-02-25T21:27:24Z (about 3 years ago)

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Update list based on presence of identifier in a second list

In C#, I have two lists and need to mark records in the first based on the second. Here's a sample:

```
public class Vehicle
{
    public string Make { get; set; }
    public string VIN { get; set; }
    public string Color { get; set; }
    public bool HasRegistration { get; set; } = false;
}
```

The second list is simply a set of VINs (List<string>) that have been registered. I need to mark all the vehicles in the List<Vehicle> which have their VIN somewhere in the List<string>. This is what I have, and it works, but I am looking for something more LINQ.

```
foreach(var v in vehicles)
{
    if (vinList.Contains(v.VIN))
    {
       v.HasRegistration = true;
    }
}
```

I could also do `v.HasRegistration = (vinList.Contains(v.VIN));`

Can this be done in a single LINQ statement?

c# linq

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