我想使用c#检查字符串值是否包含字符串数组中的单词。例如,
string stringToCheck = "text1text2text3";
string[] stringArray = { "text1", "someothertext", etc... };
if(stringToCheck.contains stringArray) //one of the items?
{
}
我如何检查字符串值'stringToCheck'是否包含数组中的一个词?
我想使用c#检查字符串值是否包含字符串数组中的单词。例如,
string stringToCheck = "text1text2text3";
string[] stringArray = { "text1", "someothertext", etc... };
if(stringToCheck.contains stringArray) //one of the items?
{
}
我如何检查字符串值'stringToCheck'是否包含数组中的一个词?
当前回答
你可以定义自己的string.ContainsAny()和string.ContainsAll()方法。作为奖励,我甚至还抛出了一个string.Contains()方法,该方法允许不区分大小写的比较等等。
public static class Extensions
{
public static bool Contains(this string source, string value, StringComparison comp)
{
return source.IndexOf(value, comp) > -1;
}
public static bool ContainsAny(this string source, IEnumerable<string> values, StringComparison comp = StringComparison.CurrentCulture)
{
return values.Any(value => source.Contains(value, comp));
}
public static bool ContainsAll(this string source, IEnumerable<string> values, StringComparison comp = StringComparison.CurrentCulture)
{
return values.All(value => source.Contains(value, comp));
}
}
你可以用下面的代码进行测试:
public static void TestExtensions()
{
string[] searchTerms = { "FOO", "BAR" };
string[] documents = {
"Hello foo bar",
"Hello foo",
"Hello"
};
foreach (var document in documents)
{
Console.WriteLine("Testing: {0}", document);
Console.WriteLine("ContainsAny: {0}", document.ContainsAny(searchTerms, StringComparison.OrdinalIgnoreCase));
Console.WriteLine("ContainsAll: {0}", document.ContainsAll(searchTerms, StringComparison.OrdinalIgnoreCase));
Console.WriteLine();
}
}
其他回答
这些解决方案大多数是正确的,但如果你需要检查值不区分大小写:
using System.Linq;
...
string stringToCheck = "text1text2text3";
string[] stringArray = { "text1", "someothertext"};
if(stringArray.Any(a=> String.Equals(a, stringToCheck, StringComparison.InvariantCultureIgnoreCase)) )
{
//contains
}
if (stringArray.Any(w=> w.IndexOf(stringToCheck, StringComparison.InvariantCultureIgnoreCase)>=0))
{
//contains
}
dotNetFiddle例子
我使用下面的代码来检查字符串是否包含字符串数组中的任何项:
foreach (string s in stringArray)
{
if (s != "")
{
if (stringToCheck.Contains(s))
{
Text = "matched";
}
}
}
方法如下:
using System.Linq;
if(stringArray.Any(stringToCheck.Contains))
/* or a bit longer: (stringArray.Any(s => stringToCheck.Contains(s))) */
这个函数检查stringToCheck是否包含stringArray的子字符串。如果你想确保它包含所有的子字符串,将Any更改为all:
if(stringArray.All(stringToCheck.Contains))
要完成前面的回答,对于IgnoreCase检查,使用:
stringArray.Any(s => stringToCheck.IndexOf(s, StringComparison.CurrentCultureIgnoreCase) > -1)
⚠️ Note: this does not answer the question asked |
---|
The question asked is "how can I check if a sentence contains any word from a list of words?" |
This answer checks if a list of words contains one particular word |
stringArray.ToList().Contains(stringToCheck)