Sort list of objects containing other objects by string C# Linq
I want to add functionality to sort data, by getting the string of the sort column from the Angular frontend. Here follows a short scenario.
The database model of ObjectA : Entity, IAggregateRoot. ObjectA has simple elements like Id and Name, but also has an extra object ObjectB. ObjectB has simple elements like Id and Name, but also has an extra object ObjectC, which only has simple objects Id and Name.
ObjectA: {
Id: Guid,
Name: String,
ObjectB: {
Id: Guid,
Name: String,
ObjectC: {
Id: Guid,
Name: String,
}
}
}
The model that is given to the frontend is flattened with only important elements:
ObjectA: {
Id: Guid,
Name: String,
ObjectBName: String,
ObjectCName: String
}
Now, a list of ObjectA is displayed, and I want to add sorting on it. I receive the element name (string) from the frontend to sort on, e.g. id. This sort is easily done in the backend by a Linq query like:
return objectAList.OrderBy(x => GetPropertyToSort(x, orderByString));
With the function GetPropertyToSort():
private string GetPropertyToSort(object obj, string orderBy)
{
var prop = obj.GetType().GetProperty(char.ToUpper(orderBy[0]) + orderBy.Substring(1));
var propValue = prop.GetValue(obj)?.ToString();
return propValue;
}
But how can sorting by another object element, e.g. objectCName, be achieved by receiving only the flattened string value (which is actually the element ObjectA.ObjectB.ObjectC.Name)?
entity-framework linq asp.net-core-2.0 .net-standard-2.0
asked Nov 13 '18 at 9:09
Robbert RaatsRobbert Raats
12414
add a comment |
I want to add functionality to sort data, by getting the string of the sort column from the Angular frontend. Here follows a short scenario.
The database model of ObjectA : Entity, IAggregateRoot. ObjectA has simple elements like Id and Name, but also has an extra object ObjectB. ObjectB has simple elements like Id and Name, but also has an extra object ObjectC, which only has simple objects Id and Name.
ObjectA: {
Id: Guid,
Name: String,
ObjectB: {
Id: Guid,
Name: String,
ObjectC: {
Id: Guid,
Name: String,
}
}
}
The model that is given to the frontend is flattened with only important elements:
ObjectA: {
Id: Guid,
Name: String,
ObjectBName: String,
ObjectCName: String
}
Now, a list of ObjectA is displayed, and I want to add sorting on it. I receive the element name (string) from the frontend to sort on, e.g. id. This sort is easily done in the backend by a Linq query like:
return objectAList.OrderBy(x => GetPropertyToSort(x, orderByString));
With the function GetPropertyToSort():
private string GetPropertyToSort(object obj, string orderBy)
{
var prop = obj.GetType().GetProperty(char.ToUpper(orderBy[0]) + orderBy.Substring(1));
var propValue = prop.GetValue(obj)?.ToString();
return propValue;
}
But how can sorting by another object element, e.g. objectCName, be achieved by receiving only the flattened string value (which is actually the element ObjectA.ObjectB.ObjectC.Name)?
entity-framework linq asp.net-core-2.0 .net-standard-2.0
asked Nov 13 '18 at 9:09
Robbert RaatsRobbert Raats
12414
IsorderByString == "ObjectCName"ororderByString == "ObjectA.ObjectB.ObjectC.Name"? (If it's the former, and the ordered list is the flattened one, you can still useGetPropertyToSort)
– HeyJude
Nov 21 '18 at 14:55
add a comment |
I want to add functionality to sort data, by getting the string of the sort column from the Angular frontend. Here follows a short scenario.
The database model of ObjectA : Entity, IAggregateRoot. ObjectA has simple elements like Id and Name, but also has an extra object ObjectB. ObjectB has simple elements like Id and Name, but also has an extra object ObjectC, which only has simple objects Id and Name.
ObjectA: {
Id: Guid,
Name: String,
ObjectB: {
Id: Guid,
Name: String,
ObjectC: {
Id: Guid,
Name: String,
}
}
}
The model that is given to the frontend is flattened with only important elements:
ObjectA: {
Id: Guid,
Name: String,
ObjectBName: String,
ObjectCName: String
}
Now, a list of ObjectA is displayed, and I want to add sorting on it. I receive the element name (string) from the frontend to sort on, e.g. id. This sort is easily done in the backend by a Linq query like:
return objectAList.OrderBy(x => GetPropertyToSort(x, orderByString));
With the function GetPropertyToSort():
private string GetPropertyToSort(object obj, string orderBy)
{
var prop = obj.GetType().GetProperty(char.ToUpper(orderBy[0]) + orderBy.Substring(1));
var propValue = prop.GetValue(obj)?.ToString();
return propValue;
}
But how can sorting by another object element, e.g. objectCName, be achieved by receiving only the flattened string value (which is actually the element ObjectA.ObjectB.ObjectC.Name)?
entity-framework linq asp.net-core-2.0 .net-standard-2.0
asked Nov 13 '18 at 9:09
Robbert RaatsRobbert Raats
12414
I want to add functionality to sort data, by getting the string of the sort column from the Angular frontend. Here follows a short scenario.
The database model of ObjectA : Entity, IAggregateRoot. ObjectA has simple elements like Id and Name, but also has an extra object ObjectB. ObjectB has simple elements like Id and Name, but also has an extra object ObjectC, which only has simple objects Id and Name.
ObjectA: {
Id: Guid,
Name: String,
ObjectB: {
Id: Guid,
Name: String,
ObjectC: {
Id: Guid,
Name: String,
}
}
}
The model that is given to the frontend is flattened with only important elements:
ObjectA: {
Id: Guid,
Name: String,
ObjectBName: String,
ObjectCName: String
}
Now, a list of ObjectA is displayed, and I want to add sorting on it. I receive the element name (string) from the frontend to sort on, e.g. id. This sort is easily done in the backend by a Linq query like:
return objectAList.OrderBy(x => GetPropertyToSort(x, orderByString));
With the function GetPropertyToSort():
private string GetPropertyToSort(object obj, string orderBy)
{
var prop = obj.GetType().GetProperty(char.ToUpper(orderBy[0]) + orderBy.Substring(1));
var propValue = prop.GetValue(obj)?.ToString();
return propValue;
}
But how can sorting by another object element, e.g. objectCName, be achieved by receiving only the flattened string value (which is actually the element ObjectA.ObjectB.ObjectC.Name)?
entity-framework linq asp.net-core-2.0 .net-standard-2.0
entity-framework linq asp.net-core-2.0 .net-standard-2.0
asked Nov 13 '18 at 9:09
Robbert RaatsRobbert Raats
12414
asked Nov 13 '18 at 9:09
Robbert RaatsRobbert Raats
12414
edited Nov 13 '18 at 9:56
Robbert Raats
asked Nov 13 '18 at 9:09
Robbert RaatsRobbert Raats
12414
asked Nov 13 '18 at 9:09
Robbert RaatsRobbert Raats
12414
asked Nov 13 '18 at 9:09
Robbert RaatsRobbert Raats
12414
12414
IsorderByString == "ObjectCName"ororderByString == "ObjectA.ObjectB.ObjectC.Name"? (If it's the former, and the ordered list is the flattened one, you can still useGetPropertyToSort)
– HeyJude
Nov 21 '18 at 14:55
add a comment |
IsorderByString == "ObjectCName"ororderByString == "ObjectA.ObjectB.ObjectC.Name"? (If it's the former, and the ordered list is the flattened one, you can still useGetPropertyToSort)
– HeyJude
Nov 21 '18 at 14:55
Is
orderByString == "ObjectCName" or orderByString == "ObjectA.ObjectB.ObjectC.Name"? (If it's the former, and the ordered list is the flattened one, you can still use GetPropertyToSort)– HeyJude
Nov 21 '18 at 14:55
Is
orderByString == "ObjectCName" or orderByString == "ObjectA.ObjectB.ObjectC.Name"? (If it's the former, and the ordered list is the flattened one, you can still use GetPropertyToSort)– HeyJude
Nov 21 '18 at 14:55
add a comment |
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Is
orderByString == "ObjectCName"ororderByString == "ObjectA.ObjectB.ObjectC.Name"? (If it's the former, and the ordered list is the flattened one, you can still useGetPropertyToSort)– HeyJude
Nov 21 '18 at 14:55