How do you do group by and sum in Linq?

“linq sum group by” Code Answer

  1. var result = source.
  2. . GroupBy(x => x. Currency)
  3. . Select(g => new {
  4. Currency = g. Key,
  5. Total = g. Sum(x => x. FeesCustom > 0? x. FeesCustom : x. FeesNormal)

How do you sum a column in LINQ?

Aggregate Functions in Linq To SQL

  1. SUM() : Returns the sum of column values.
  2. AVERAGE() : Returns the average of column values.
  3. COUNT() : Returns the total number of rows in a table.
  4. MAX() : Returns the maximum value in the column.
  5. MIN() : Returns the minimum value in the column.

How do you sum in C#?

To get sum of each digit by C# program, use the following algorithm:

  1. Step 1: Get number by user.
  2. Step 2: Get the modulus/remainder of the number.
  3. Step 3: sum the remainder of the number.
  4. Step 4: Divide the number by 10.
  5. Step 5: Repeat the step 2 while number is greater than 0.

What is AsEnumerable in C#?

AsEnumerable() in C# To cast a specific type to its IEnumerable equivalent, use the AsEnumerable() method. It is an extension method. The following is our array − int[] arr = new int[5]; arr[0] = 10; arr[1] = 20; arr[2] = 30; arr[3] = 40; arr[4] = 50; Now, get the IEnumerable equivalent.

What does += mean in C#?

= operator assigns the value of the right side operand to its left side operand. Like: g = s. += Operator. += operator adds the value of the variable on the left with the value on the right, which is (result) then assigned to the variable that is on the left.

Why we use IEnumerable instead of List?

“IEnumerable describes behaviour, while List is an implementation of that behaviour. When you use IEnumerable, you give the compiler a chance to defer work until later, possibly optimising along the way. If you use ToList() you force the compiler to reify the results right away.”