blocks|key|448728|text|数组(string[])实现IList，因此应该有Contains(object+o)方法。但是实现是显式的，这意味着只有当类被视为接口时，才有可能访问该方法：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|448729|if+(((IList)terms).Contains(xlWorkSheet.Cells[1,+i1+%2B+1].Value.ToString()))|code-block|syntax|javascript|448730|entityMap|0|LINK|mutability|MUTABLE|url|https://msdn.microsoft.com/en-us/library/bb336401(v=vs.110).aspx)^0|3|8|E|5|P|I|1C|6|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|F|3|G|5|H|7|12|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

Array (<code>string[]</code>) implements <code>IList</code> and therefore should have <code>Contains(object o)</code> method. But <a href="https://msdn.microsoft.com/en-us/library/bb336401(v=vs.110).aspx" rel="noreferrer">implementation is explicit</a>, meaning that access to that method is possible only if class is treated as interface:

<pre><code>if (((IList)terms).Contains(xlWorkSheet.Cells[1, i1 + 1].Value.ToString()))
</code></pre>

blocks|key|36797|text|有一个扩展方法System.Linq.Enumerable.Contains。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|36798|string[]是一个IEnumerable<string>，所以您可以使用它。|36799|将using+System.Linq;添加到文件的顶部以使用它。|36800|https://msdn.microsoft.com/en-us/library/system.linq.enumerable.contains(v=vs.110).aspx|36801|entityMap|0|LINK|mutability|MUTABLE|url^0|7|V|0|0|8|B|J|0|1|I|0|0|2F|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@$9|W|A|X|B|C]|$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|13|8|@]|D|@$9|14|A|15|1|16]]|E|$]]|$1|L|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|M|$N|$5|O|P|Q|E|$R|K]]]]

There is an extension method <code>System.Linq.Enumerable.Contains</code>.

<code>string[]</code> is an <code>IEnumerable&lt;string&gt;</code> so you can use this.

Add <code>using System.Linq;</code> to the top of the file to use it.

<a href="https://msdn.microsoft.com/en-us/library/system.linq.enumerable.contains(v=vs.110).aspx" rel="nofollow noreferrer">https://msdn.microsoft.com/en-us/library/system.linq.enumerable.contains(v=vs.110).aspx</a>

blocks|key|36779|text|您可以使用Array.Exists并传递一个比较lambda表达式：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|36780|if+(Array.Exists(terms,+elem+=>+elem+==+xlWorkSheet.Cells[1,+i1+%2B+1].Value.ToString()))
{
++++...
}|code-block|syntax|javascript|36781|entityMap^0|5|C|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

You can use <code>Array.Exists</code> and pass a comparison lambda expression:

<pre><code>if (Array.Exists(terms, elem =&gt; elem == xlWorkSheet.Cells[1, i1 + 1].Value.ToString()))
{
 ...
}
</code></pre>

blocks|key|36848|text|添加|type|unstyled|depth|inlineStyleRanges|entityRanges|data|36849|using+System.Linq;+|code-block|syntax|javascript|36850|也有帮助|36851|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Adding
<pre><code>using System.Linq; 
</code></pre>
also helps

blocks|key|1294094|text|与string[]不同，List<string>没有Contains()方法。您需要在数组中运行一个循环，并比较每个索引。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1294095|for(int+i+=+0;+i+<+terms.Length;+i%2B%2B)
{
++++if+(terms[i].Contains(xlWorkSheet.Cells[1,+i1+%2B+1].Value.ToString()))
++++{
++++++++//+do+something
++++}
}|code-block|syntax|javascript|1294096|但是，我建议您不要这样做，只使用List<string>。有了它，您就可以在示例中使用List.Contains()。在C#中，列表在大多数情况下都优于数组。|1294097|entityMap^0|1|8|C|C|Q|A|0|0|G|C|17|F|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|N|$]]

<code>string[]</code> unlike <code>List&lt;string&gt;</code> has no <code>Contains()</code> method. You'll need to run a loop through your array and compare each index.

<pre><code>for(int i = 0; i &lt; terms.Length; i++)
{
 if (terms[i].Contains(xlWorkSheet.Cells[1, i1 + 1].Value.ToString()))
 {
 // do something
 }
}
</code></pre>

However, instead of doing this I suggest you just use <code>List&lt;string&gt;</code>. With that you can use <code>List.Contains()</code> the same way you're trying to do in your example. In C# lists are superior to arrays in most cases.

blocks|key|448767|text|下列措施将起作用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|448768|using+using+System.Linq;+//Added+to+top+of+code
...
...
string[]+someList+=+{"First",+"Second",+"Third"};+//In+your+method

bool+result+=+someList.Contains("First"))+//equals+true;
bool+result2+=+someList.Contains("Fourth"))+//equals+false;|code-block|syntax|javascript|448769|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The following will work:
<pre><code>using using System.Linq; //Added to top of code
...
...
string[] someList = {&quot;First&quot;, &quot;Second&quot;, &quot;Third&quot;}; //In your method

bool result = someList.Contains(&quot;First&quot;)) //equals true;
bool result2 = someList.Contains(&quot;Fourth&quot;)) //equals false;
</code></pre>

The full error code:

<blockquote>
 Error CS1929 'string[]' does not contain a definition for 'Contains' and
 the best extension method overload
 'Queryable.Contains(IQueryable, TSource)' requires a
 receiver of type 'IQueryable'
</blockquote>

<pre><code> string[] terms = new string[31];
</code></pre>

I'm trying to see if an array contains something in my Excel file. (Using Interop)

<pre><code>if (terms.Contains(xlWorkSheet.Cells[1, i1 + 1].Value.ToString())) ;
{

}
</code></pre>

Why is Contains not working here? 

I searched and apparently, it has something to do with the type not being the same, but in this case, it is. They are both strings.

'string[]' does not contain a definition for 'Contains'

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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完整的错误代码：错误CS1929 'string[]‘不包含“包含”的定义，最好的扩展方法重载'Queryable.Contains(IQueryable，TSource)’需要一个'IQueryable‘类型的接收方。  string[] terms = new string[31];我正在尝试查看数组是否包含在我的Excel文件中。(使用互操作)if (terms.Contains(xlWor

问“string[]”不包含“包含”的定义
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回答 6

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问“string[]”不包含“包含”的定义EN

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问“string[]”不包含“包含”的定义
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