• Linq Operators

    In LINQ (Language Integrated Query), projection operators are used to transform the result set into a different shape or structure.

    They allow you to select and transform data from the source collection or query into a new form. Here are some common projection operators

    Linq Operators

    Linq Operators and its usage

    FirstOrDefault: C#, the FirstOrDefault method is part of the LINQ (Language Integrated Query) extension methods and is used to return the first element of a sequence or a default value if the sequence is empty. .
    GroupBy: GroupBy operator is used to group elements of a sequence based on a key. 
                              
                            
var result = from item in source
             group item by item.Category into grouped
             select new { Category = grouped.Key, Items = grouped.ToList() };
    		.
    SelectMany: SelectMany used to Flatten nested Collection without foreach statement .
    Select: The Select operator is used to project each element of a sequence into a new form. 
       
  
                  var result = from item in source
                select item.Property; // Selecting a specific property
    Select with Index Operator: Introduced in C# 7.0, the Select operator can also include the index of each element in the sequence. 
       
  
  var result = source.Select((item, index) => new { Item = item, Index = index });
    Anonymous Types: You can use anonymous types to create a new type with specific properties from the original source. 
       
  
var result = from item in source
             select new { Name = item.Name, Age = item.Age };
    Projection with Query Syntax and Method Syntax Combination: 
       
  
                  var result = from item in source
             where item.Condition
             orderby item.Property
             select new { Name = item.Name, Value = item.Property };
    		.

    Comments

    Post a Comment