Error Message - "Method may only be called on a Type for which Type.IsGenericParameter is true" - while making use of a custom control

Hi everybody,

In my project i am making use of a custom control CC1 which was working perfectly fine in the .NET 1.1 framework... I exported the same to .NET2.0 and now it is not even generating an event!!!

After much probing I found this particular message - "Method may only be called on a Type for which Type.IsGenericParameter is true." - Is this in any way related to the error in the functionality (error in event creation) i am facing??? Can I manually set any control to a generic type? How can I do that??

Can somebody please help me out in this matter.  

Hoping a reply from any of you at the earliest.


2/9/2007 11:38:24 AM 3498 articles. 0 followers. Follow

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U can't define the class for your custom control to be of generic type
Then the error tells you about parameter of method   Which method?

Can you post here or Email me your code?   
Guennadi Vanine - Gennady Vanin - Геннадий Ванин
2/9/2007 12:25:17 PM

Hi Guenavan,

Can you possibly list out the reasons why events are not getting generated in this particular situation. Are there any changes to be made to the code of a custom control when we migrate it from 1.1 to 2.0 ??? Or are there any specific attribute to be set in 2.0 which was not required previously???

Let me again mention this - it was working as expected in 1.1... and now in 2.0 framework the event itself is not getting generated...




2/9/2007 12:44:40 PM
what situation? You did not explain anything specifically
Guennadi Vanine - Gennady Vanin - Геннадий Ванин
2/9/2007 1:02:50 PM

The custom control being used has the following model - It has a table and each cell of this table contains a button. Something like this,

public class TableControl : WebControl

         Table1 T = new Table1();       

internal class Table1 :Table
        public delegate void DecisionTableChangedHandler(TableRow[] newTable);
        public event DecisionTableChangedHandler DecisionTableChanged;
        // code...

        TableRow row = new TableRow();

         Cell1 c = new Cell1();
         Button1 B = new Button1();


internal class Button1 : WebControl
        ImageButton btn1 = new ImageButton();
        public event EventHandler Click;
        // Design properties...

internal class Cell1:TableCell
        public delegate void DTCellEventHandler (Cell cell, DTEvent e) ;
        public event DTCellEventHandler CellEvent;
       // code ...

Well, all I want to know is why events are not being raised in the custom control which I have been using. Is it in any way related to the message i posted earlier?? - "Method may only be called on a Type for which Type.IsGenericParameter is true" - or is it not?

I would also be very much pleased if anybody can just suggest the reasons for why the events are not getting raised...

Hope this is clear enough Guenavan... :)


2/12/2007 5:29:53 AM
How did you get the message "Method may only be called on a Type for which Type.IsGenericParameter is true"? Was an exception thrown, and if there was, can you post the call stack?
2/14/2007 9:18:24 PM

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