在 C# 中从数组中查找和删除项目
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Find and remove items from array in c#
提问by Nelson T Joseph
I have a string array. I need to remove some items from that array. but I don't know the index of the items that need removing.
我有一个字符串数组。我需要从该数组中删除一些项目。但我不知道需要删除的项目的索引。
My array is : string[] arr= {" ","a","b"," ","c"," ","d"," ","e","f"," "," "}.
我的数组是： string[] arr= {" ","a","b"," ","c"," ","d"," ","e","f"," "," "}。
I need to remove the " " items. ie after removing " " my result should be arr={"a","b","c","d","e","f"}
我需要删除“”项目。即删除 " " 我的结果应该是 arr={"a","b","c","d","e","f"}
how can I do this?
我怎样才能做到这一点？
采纳答案by BlueM
string[] arr = {" ", "a", "b", " ", "c", " ", "d", " ", "e", "f", " ", " "};
arr = arr.Where(s => s != " ").ToArray();
回答by ?yvind Br?then
This will remove all entries that is null, empty, or just whitespaces:
这将删除所有为空、空或只是空格的条目：
arr.Where( s => !string.IsNullOrWhiteSpace(s)).ToArray();
If for some reason you only want to remove the entries with just one whitespace like in your example, you can modify it like this:
如果出于某种原因，您只想像示例中那样只删除一个空格的条目，您可以像这样修改它：
arr.Where( s => s != " ").ToArray();
回答by kamui
Using LinQ
使用 LinQ
using System.Linq;
string[] arr= {" ","a","b"," ","c"," ","d"," ","e","f"," "," "}.
arr.Where( x => !string.IsNullOrWhiteSpace(x)).ToArray();
or depending on how you are filling the array you can do it before
或者根据您如何填充阵列，您可以在此之前完成
string[] arr = stringToBeSplit.Split('/', StringSplitOptions.RemoveEmptyEntries);
then empty entries will not be put into your string array in the first place
那么空条目将不会首先放入您的字符串数组中
回答by Sunil Dhappadhule
You can use Except to remove blank value
您可以使用 except 删除空白值
string[] arr={" ","a","b"," ","c"," ","d"," ","e","f"," "," "}.
arr= arr.Except(new List<string> { string.Empty }).ToArray();
