如何合并2 List< T>并在C#中从中删除重复的值 [英] How to merge 2 List<T> and removing duplicate values from it in C#

问题描述

我有两个列表，我需要将它们合并到第三个列表中，并从该列表中删除重复的值

I have two lists List that I need to combine in third list and remove duplicate values from that lists

有点难以解释，所以让我展示一个示例代码，其结果是我想要的示例，在示例中，我使用int类型而不是ResultAnalysisFileSql类.

A bit hard to explain, so let me show an example of what the code looks like and what I want as a result, in sample I use int type not ResultAnalysisFileSql class.

first_list = [1，12，12，5]

first_list = [1, 12, 12, 5]

second_list = [12、5、7、9、1]

second_list = [12, 5, 7, 9, 1]

将两个列表合并的结果应显示在此列表中: result_list = [1，12，5，7，9]

The result of combining the two lists should result in this list: resulting_list = [1, 12, 5, 7, 9]

您会注意到，结果具有第一个列表，包括其两个"12"值，而在second_list中具有一个额外的12、1和5值.

You'll notice that the result has the first list, including its two "12" values, and in second_list has an additional 12, 1 and 5 value.

ResultAnalysisFileSql类

ResultAnalysisFileSql class

[Serializable]
    public partial class ResultAnalysisFileSql
    {
        public string FileSql { get; set; }

        public string PathFileSql { get; set; }

        public List<ErrorAnalysisSql> Errors { get; set; }

        public List<WarningAnalysisSql> Warnings{ get; set; }

        public ResultAnalysisFileSql()
        {

        }

        public ResultAnalysisFileSql(string fileSql)
        {
            if (string.IsNullOrEmpty(fileSql)
                || fileSql.Trim().Length == 0)
            {
                throw new ArgumentNullException("fileSql", "fileSql is null");
            }

            if (!fileSql.EndsWith(Utility.ExtensionFicherosErrorYWarning))
            {
                throw new ArgumentOutOfRangeException("fileSql", "Ruta de fichero Sql no tiene extensión " + Utility.ExtensionFicherosErrorYWarning);
            }

            PathFileSql = fileSql;
            FileSql = ObtenerNombreFicheroSql(fileSql);
            Errors = new List<ErrorAnalysisSql>();
            Warnings= new List<WarningAnalysisSql>();
        }

        private string ObtenerNombreFicheroSql(string fileSql)
        {
            var f = Path.GetFileName(fileSql);
            return f.Substring(0, f.IndexOf(Utility.ExtensionFicherosErrorYWarning));
        }


        public override bool Equals(object obj)
        {
            if (obj == null)
                return false;
            if (!(obj is ResultAnalysisFileSql))
                return false;

            var t = obj as ResultAnalysisFileSql;
            return t.FileSql== this.FileSql
                && t.PathFileSql == this.PathFileSql
                && t.Errors.Count == this.Errors.Count
                && t.Warnings.Count == this.Warnings.Count;
        }


    }

是否有用于合并和删除重复项的示例代码?

Any sample code for combine and removing duplicates ?

推荐答案

您看看 Enumerable.Union

此方法从返回集中排除重复项.这不一样 对Concat的行为 方法，该方法返回所有元素 在输入序列中包括 重复.

This method excludes duplicates from the return set. This is different behavior to the Concat method, which returns all the elements in the input sequences including duplicates.

List<int> list1 = new List<int> { 1, 12, 12, 5};
List<int> list2 = new List<int> { 12, 5, 7, 9, 1 };
List<int> ulist = list1.Union(list2).ToList();

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