attribute = (MyType)Attribute.GetCustomAttribute(t, typeof(MyType));

attribute = Attribute.GetCustomAttribute(t, attributeType);

attribute = (IMyAttribute)Attribute.GetCustomAttribute(t, attributeType);

quote:

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I do not know how to do the dynamic cast in C#, and it must be possible

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BlockA* ba = dynamic_cast<BlockA*>(eblock);
if(ba != NULL)
{
...
}

quote:

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The problem I had was a bit different since I wanted to give the type, into which I would cast, as an argument to some method.

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quote:

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you wanted to give a System.Type to your method as a argument(at runtime)and then did a casting to that Type..did you do this?

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quote:

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Instead of casting using something like

(Int32) y

In my app, I won't know that y is Int32 at coding time. That info will be loaded from a file or a database.  So, if the string variable t is set to "Int32" to hold the type of y, I want to be able to do something like

(Type.GetType("System."+t)) y

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quote:

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You said you "interfaced" yourself out of the problem.  Are you able to do what I was trying to do above with that method?  I need to learn more about interfaces I guess, but it does seem like there should be an easier way.

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// Getting an array of file information about the files matching the
// pattern given.
info = new DirectoryInfo(folder).GetFiles(filePattern);
foreach(FileInfo f in info)
{
    a = Assembly.LoadFrom(f.FullName);
    foreach(Type t in a.GetTypes())
    {
        // Retrieving the attribute with type attributeType if 
        // existing...
        attribute = (IPluginAttribute)Attribute.GetCustomAttribute(t
            , attributeType);
        // If the attribute is found and the property Name equals
        // what we are looking for the assembly is returned.
        if(attribute != null && attribute.Name.Equals(name))
        {
            this.type = t;
            this.assembly = a;
        }
    }
}

quote:

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Originally posted by jacob

However in order to make this general (since it require a type cast) I had to make the different attributes implement an interface, which I then can use for the cast.

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quote:

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Originally posted by jacob

       attribute = (IPluginAttribute)Attribute.GetCustomAttribute(t
            , attributeType);
        // If the attribute is found and the property Name equals
        // what we are looking for the assembly is returned.
        if(attribute != null && attribute.Name.Equals(name))
        {
            this.type = t;
            this.assembly = a;
        }

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quote:

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I think you wanted a type cast for your several attributes so that you could be able to have the exact attribute and ...(instead of working on IPluginAttribute)

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public void LoadPluginAttribute(Type attributeType, string name)
{
    ...
    attribute = (attributeType)Attribute.GetCustomAttribute(t, attributeType);
    if(attribute != null && attribute.Name.Equals(name))
    {
        ...
    }
    ...
}

quote:

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Originally posted by paulie100

Instead of casting using something like

(Int32) y

In my app, I won't know that y is Int32 at coding time. That info will be loaded from a file or a database.  So, if the string variable t is set to "Int32" to hold the type of y, I want to be able to do something like

(Type.GetType("System."+t)) y

---