问题描述
如何在C#中合并/合并两个StringCollection
var collection1 = new StringCollection () { "AA","BB","CC" };
var collection2 = new StringCollection () { "DD","EE","FF" };
var resultCollection = collection1 + collection2 ; // Todo
解决方法
您可以将所有内容复制到这样的数组
var collection1 = new StringCollection() { "AA","BB","CC" };
var collection2 = new StringCollection() { "DD","EE","FF" };
var array = new string[collection2.Count + collection1.Count];
collection1.CopyTo(array,0);
collection2.CopyTo(array,collection1.Count);
,
如果您仍想收集字符串,则可以使用AddRange
var collection1 = new StringCollection () { "AA","CC" };
var collection2 = new StringCollection () { "DD","FF" };
var resultCollection = new StringCollection();
resultCollection.AddRange(collection1.Cast<string>.ToArray());
resultCollection.AddRange(collection2.Cast<string>.ToArray());
似乎奇怪的是StringCollection
没有直接支持添加其他StringCollection
的功能。如果效率是一个问题,Beingnin's answer可能比这里的答案更有效,并且如果您仍然需要StringCollection
,可以使用生成的数组并使用AddRange
添加该字符串数组到新的StringCollection
您可以转换为数组并使用Union,请注意,这也会删除重复项
var resultCollection = collection1.Cast<string>().Union(collection2.Cast<string>())
,
您可以使用List而不是StringCollection ...
var collection1 = new List<string>() { "AA","CC" };
var collection2 = new List<string>() { "DD","FF" };
var resultCollection = collection1.Concat(collection2).ToList();