Parameter error

Question

I'm getting this error (translated from german): An exception (first chance) from the Type "System.Reflection.TargetParameterCountException" occured in System.Windows.Forms.dll.

My Code:

        private async void ClientLogedIn(object sender, string username, string ipAddress)
    {
        PVPNetConnect.RiotObjects.Platform.Clientfacade.Domain.LoginDataPacket LoginData = await pvp.GetLoginDataPacketForUser();
        PVPNetConnect.RiotObjects.Platform.Summoner.AllSummonerData AllSummonerData = LoginData.AllSummonerData;
        PVPNetConnect.RiotObjects.Platform.Summoner.Summoner Summoner = AllSummonerData.Summoner;
        Invoke(new AddDelegate(Add), new string[] { "Dd", "ee", "ff" });
    }

The delegate + void:

        private delegate void AddDelegate(String[] vars);
    private void Add(string[] vars)
    {
        var li = new ListViewItem(vars);
        listView1.Items.Add(li);
    }

Reed Copsey · Accepted Answer · 2014-02-12 18:35:16Z

3

You need to wrap the array into the first element of an object array:

Invoke(new AddDelegate(Add), new object[] { new string[] { "Dd", "ee", "ff" } });

Note that this is typically easier to write using a lambda instead, as you don't need to worry about the delegate declaration or managing the object array:

Invoke(new Action( () => Add(new[] { "Dd", "ee", "ff" }));

answered Feb 12, 2014 at 18:35

Reed Copsey

567k80 gold badges1.2k silver badges1.4k bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Servy · Accepted Answer · 2014-02-12 18:37:04Z

1

Because Invoke uses params for the second argument, you can either provide N different arguments and have them all wrapped up in an array for you, or you can just provide an array of all of the arguments to pass in. Here your string array is interpreted as meaning "pass in three arguments, each of type string", which is not what you want, you want to pass in one argument of type string[]. To do this simply ensure that the compile time type of the argument isn't an array, this can be done with a simple cast:

Invoke(new AddDelegate(Add), (object)new string[] { "Dd", "ee", "ff" });

answered Feb 12, 2014 at 18:37

Servy

204k27 gold badges347 silver badges470 bronze badges

Collectives™ on Stack Overflow

Parameter error

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related