## How do you sum a column in C#?

DataTable Compute method

1. Decimal TotalPrice = Convert.ToDecimal(dt.Compute(“SUM(Price)”, string.Empty));
2. Decimal TotalPrice = Convert.ToDecimal(dt.Compute(“SUM(Price)”, “ProductId > 3”));

How can calculate sum of column in DataTable in VB net?

VB.NET Code

1. Dim dt As New DataTable()
2. Dim cmd As New SqlCommand(“select * from productinfo”, con)
3. Dim da As New SqlDataAdapter(cmd)
4. Dim sum= dt.Compute(“Sum(price)”, “”).ToString()

### How do you sum two columns in Linq?

1. Or when Item has no unique identifier, you could write group p by p into g .
2. That did the trick, albeit with a modification: from p in m.Items group p by p.Id into g select new { SumTotal = g.Sum(r => r.Total), SumDone = g.Sum(r => r.Done) }

What is DataView in VB net?

The DataView provides different views of the data stored in a DataTable. That is we can customize the views of data from a DataTable. DataView can be used to sort, filter, and search the data in a DataTable , additionally we can add new rows and modify the content in a DataTable.

## How do you sum in VB net?

To do so:

1. Type in a = Val(TextBox1. Text) and press ↵ Enter .
2. Type in b = Val(TextBox2. Text) and press ↵ Enter .
3. Type in sum = (a + b) and press ↵ Enter .
4. Type in Label4. Text = “The sum of” & a & ” and ” & b & ” is ” & sum & “.” and press ↵ Enter .

How do you sum in Linq?

In LINQ, you can find the sum of the given numeric elements by using the Sum() method. This method calculates the sum of the numeric value present in the given sequence. It does not support query syntax in C#, but it supports in VB.NET. It is available in both Enumerable and Queryable classes in C#.

### What is deferred execution C#?

Deferred execution means that the evaluation of an expression is delayed until its realized value is actually required. It greatly improves performance by avoiding unnecessary execution.