错误绑定到目标方法 [英] Error binding to target method

问题描述

我正在尝试从一个助手类调用一个静态方法，其中类型在运行时才是不知道的。我以为我已经解决了问题，但是我收到以下错误 -

绑定到目标方法时出错。

谁能看到这段代码有什么问题？任何帮助将不胜感激。

  Delegate del = Delegate.CreateDelegate（typeof（Func< string>））
 typeof（RepositoryStringExtensions）.GetMethod（GetTableName，BindingFlags.Static | BindingFlags.Public）
 .MakeGenericMethod（new Type [] {objectType}））作为Func< string> ;; 
 
 string tableName =（string）del.DynamicInvoke（context）; 
  

上面的类型objecttype可以是任何类，RepositoryStringExtensions是包含方法，它试图调用的方法显示在下面 -

  public static string GetTableName&T;（此DbContext上下文）其中T：class 
 {
 ObjectContext objectContext =（（IObjectContextAdapter）context）.ObjectContext; 
 
 return objectContext.GetTableNameByObject< T>（）; 
} 
  

解决方案

您应该使用 Func< DbContext，string> 而不是 Func< string> 。

I am trying to call a static method from a helper class, of which the type is not known until runtime. I thought I had solved the problem however I am getting the following error -

"Error binding to target method."

Can anyone see what is wrong with this code? Any help would be appreciated..

    Delegate del = Delegate.CreateDelegate(typeof(Func<string>),
                    typeof(RepositoryStringExtensions).GetMethod("GetTableName", BindingFlags.Static | BindingFlags.Public)
                    .MakeGenericMethod(new Type[] { objectType })) as Func<string>;

    string tableName = (string)del.DynamicInvoke(context);

The type "objecttype" above can be any class, "RepositoryStringExtensions" is the helper class which contains the method, the method it is trying to call is displayed below -

    public static string GetTableName<T>(this DbContext context) where T : class
    {
        ObjectContext objectContext = ((IObjectContextAdapter)context).ObjectContext;

        return objectContext.GetTableNameByObject<T>();
    }

解决方案

You should use Func<DbContext, string> instead of Func<string>.

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