How Can LINQ Efficiently Split a List into Sublists of a Specified Size?

Use Linq efficient segmentation list

LINQ provides a simple and powerful data processing method for the .NET application, including the function of dividing the list into a sub -list according to various conditions.

Consider the following issues: You have a

, you need to divide it into several sub -lists of the

object, and the size of each child list is determined by the index. For example, the original list contains the following elements: List<T> T

The list you want to get is:

<code>[a, g, e, w, p, s, q, f, x, y, i, m, c]</code>

The size of the sub -list can be specified as a function parameter.

<code>[a, g, e], [w, p, s], [q, f, x], [y, i, m], [c]</code>

A solution using linq is as follows:

This code executes the following steps:

<code class="language-csharp">public static List<List<T>> Split<T>(IList<T> source, int sublistSize)
{
    return source
        .Select((x, i) => new { Index = i, Value = x })
        .GroupBy(x => x.Index / sublistSize)
        .Select(x => x.Select(v => v.Value).ToList())
        .ToList();
}</code>

According to the index group

:
1. The method is paid to the elements in the source list according to the element index, each group represents a different sub -list. Parameter control subline size. GroupBy Select the sub -list sublistSize:
The method is used to extract the values ​​in each group into a new list.
2. Converted to the list list : Then use Select to convert the group into a list.
3. The result is a , each of which contains the specified elements of the original list, and is divided according to the index of the project. By passing into the parameters, the size of the sub -list can be flexibly controlled. ToList

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