从C#中的列表返回唯一值

问题描述

大家好，
我有一个应用程序，其中我从gridview获取ID并将其保存在整数列表List< int>中.

Hi all,
I have an application in which i get the id''s from a gridview and save it in an integer list List<int>.

List<int> list = new List<int>();

//Example say, if the values in my list is 

 list={100,100,101,124,155,114,101};

//I want my list to return only unique values as i am passing my list to a database for retrieving data.

//I want my list to return like this.

list={100,101,124,155,114};

我该怎么办.请帮助我....

How can i do this.Pls help me....

推荐答案

List<int> list = new List<int>();
            list.Add(100);
            list.Add(100);
            list.Add(101);
            list = list.Distinct().ToList();

现在它将有100和101

Now this will have 100 and 101

List<int> l = new List<int>() { 100, 100, 101, 102, 103, 102 };

var v = l.Distinct();

foreach (var item in v)
{
    Debug.WriteLine(item.ToString());
}

// or

List<int> li = l.Distinct().ToList();

会给你:

Will give you:

100
101
102
103

HashSet<int> uniqueNumbers = new HashSet<int>(list);</int></int>

这将为HashSet提供唯一编号，在您的情况下仅包含5个值.

This will give a HashSet with unique number, in your case list of 5 values only.

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