blocks|key|1223782|text|您可以创建一个泛型方法，通过它们的名称在任何您想要的实例上调用方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1223783|public+void+RunMethodOn(object+obj,+String+methodName,params+Object[]+args)
++++++++{
++++++++++++if(obj+!=+null)
++++++++++++{
++++++++++++++++System.Reflection.MethodInfo+method+=+null;
++++++++++++++++method+=+obj.GetType().GetMethod(methodName);
++++++++++++++++if+(method+!=+null)
++++++++++++++++++++method.Invoke(obj,+args);
++++++++++++}
++++++++}|code-block|syntax|javascript|1223784|并使用它在您自己的实例上调用一个方法，如下所示：|1223785|public+void+RunMethod(String+methodName,params+Object[]+args)
++++++++++++{
+++++++++++++++++++ExecuteOn(this,+methodName,+args);
++++++++++++}|1223786|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You can create a generic method to invoke methods by their name on any instance you want this way:

<pre><code>public void RunMethodOn(object obj, String methodName,params Object[] args)
 {
 if(obj != null)
 {
 System.Reflection.MethodInfo method = null;
 method = obj.GetType().GetMethod(methodName);
 if (method != null)
 method.Invoke(obj, args);
 }
 }
</code></pre>

And the use it to call a method on your own instance as you ask:

<pre><code>public void RunMethod(String methodName,params Object[] args)
 {
 ExecuteOn(this, methodName, args);
 }
</code></pre>

blocks|key|1980005|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1980006|Type+t+=+Type.GetType(typeName);
t.InvokeMember("method",+BindingFlags.InvokeMethod+%7C+BindingFlags.Public,+null,+null,+null);|code-block|syntax|javascript|1980007|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|$]]

Try this:

<pre><code>Type t = Type.GetType(typeName);
t.InvokeMember("method", BindingFlags.InvokeMethod | BindingFlags.Public, null, null, null);
</code></pre>

blocks|key|2243099|text|就像这样|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2243100|Type+type+=+GetType("MyType");
MethodInfo+methodInfo+=+type.GetMethod(methodName);
methodInfo.Invoke()|code-block|syntax|javascript|2243101|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|$]]

Something like

<pre><code>Type type = GetType("MyType");
MethodInfo methodInfo = type.GetMethod(methodName);
methodInfo.Invoke()
</code></pre>

blocks|key|2238186|text|我使用了这样的seomthing：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2238187|typeof(StringValidator<T>).GetMethod(restriction.Operacion.Nombre).Invoke(null,+param)+as+IList<T>;|code-block|syntax|javascript|2238188|根据包含该方法的类的类型(StringValidator)，然后通过方法的名称restriction.Operacion.Nombre获取该方法，并调用它。|2238189|希望能有所帮助|2238190|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I used seomthing like this:

<pre><code>typeof(StringValidator&lt;T&gt;).GetMethod(restriction.Operacion.Nombre).Invoke(null, param) as IList&lt;T&gt;;
</code></pre>

based on the type of the class that contains the method (StringValidator) then I get the method by it's name restriction.Operacion.Nombre, and Invoke it.

hope it helps

blocks|key|1223741|text|This+example拥有您正在寻找的内容，即：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1223742|String+s+=+(String)calledType.InvokeMember(
++++++++++++++++methodName,
++++++++++++++++BindingFlags.InvokeMethod+%7C+BindingFlags.Public+%7C+
++++++++++++++++++++BindingFlags.Static,
++++++++++++++++null,
++++++++++++++++null,
++++++++++++++++null);|code-block|syntax|javascript|1223743|(显然，这可能会根据返回类型等的不同而发生变化。)|1223744|entityMap|0|LINK|mutability|MUTABLE|url|http://www.codeproject.com/Articles/19911/Dynamically-Invoke-A-Method-Given-Strings-with-Met^0|0|C|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

<a href="http://www.codeproject.com/Articles/19911/Dynamically-Invoke-A-Method-Given-Strings-with-Met" rel="nofollow">This example</a> has what you are looking for namely:

<pre><code>String s = (String)calledType.InvokeMember(
 methodName,
 BindingFlags.InvokeMethod | BindingFlags.Public | 
 BindingFlags.Static,
 null,
 null,
 null);
</code></pre>

(Obviously this may change depending on return types etc.)

blocks|key|1223764|text|如果方法不是静态的，则需要类型、方法名称和实例|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1223765|检查Reflection:+How+to+Invoke+Method+with+parameters|offset|length|1223766|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/2202381/reflection-how-to-invoke-method-with-parameters^0|0|2|1C|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

You need the type, the method name, and an instance if the method is not static

Check <a href="https://stackoverflow.com/questions/2202381/reflection-how-to-invoke-method-with-parameters">Reflection: How to Invoke Method with parameters</a>

blocks|key|341014|text|你可以用一个扩展方法很好地做到这一点：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|341015|public+static+class+MethodEx
{
++++public+static+void+RunMethod(
+++++++++this+object+target,
+++++++++string+methodName,
+++++++++params+object[]+values)
++++{
++++++++var+type=target.GetType();
++++++++var+mi+=+
++++++++++type.GetMethod(methodName,values.Select(v=>v.GetType()).ToArray());
++++++++mi.Invoke(target,values);
++++}
}|code-block|syntax|javascript|341016|...and的用法如下：|341017|void+Main()
{
++++var+m=new+Monkey();
++++m.RunMethod("A",1);
++++m.RunMethod("A","frog");
}

class+Monkey
{
++++public+void+A(int+a)
++++{
++++++++Console.WriteLine("int+A+called");
++++}
++++public+void+A(string+s)
++++{
++++++++Console.WriteLine("string+A+called");
++++}
}|341018|它将根据提供的参数选择正确的重载，因此上面的代码给出了输出：|341019|341020|+int+A已调用|blockquote|341021|341022|字符串A被调用|341023|341024|我把更好的错误处理留给了操作员。|341025|entityMap^0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|13|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|14|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|15|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|16|8|@]|9|@]|A|$]]|$1|T|3|-4|5|6|7|17|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|18|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|19|8|@]|9|@]|A|$]]]|X|$]]

You can do this very nicely with an extension method:

<pre><code>public static class MethodEx
{
 public static void RunMethod(
 this object target,
 string methodName,
 params object[] values)
 {
 var type=target.GetType();
 var mi = 
 type.GetMethod(methodName,values.Select(v=&gt;v.GetType()).ToArray());
 mi.Invoke(target,values);
 }
}
</code></pre>

...and use it as follows:

<pre><code>void Main()
{
 var m=new Monkey();
 m.RunMethod("A",1);
 m.RunMethod("A","frog");
}

class Monkey
{
 public void A(int a)
 {
 Console.WriteLine("int A called");
 }
 public void A(string s)
 {
 Console.WriteLine("string A called");
 }
}
</code></pre>

which will choose the right overload according to the supplied params, so the code above gives output:

<blockquote>
 int A called
 
 string A called
</blockquote>

I leave better error handling to the OP.

I would like to know if there is a way in c# to execute a method, if we have only it's name in a string ? 

<pre><code>string methodname="method"
this.RunMethod(methodname)
</code></pre>

Something like that ? 

Thanks :)

How to evaluate a function passed by a string in c#

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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我想知道在c#中是否有一种方法来执行一个方法，如果我们在一个字符串中只有它的名字？string methodname="method"this.RunMethod(methodname)像这样的吗？谢谢:)

问如何在c#中计算通过字符串传递的函数
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回答 7

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问如何在c#中计算通过字符串传递的函数
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