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protected override void LoadToView(CaseStageDomObj caseStage)
                Button btn = (Button)((ViewComplaint)Page).ReturnTheButton();
                Button _button = (Button)Serialize<Button>(btn);
                ViewState.Add("Button", _button);

public static MemoryStream Serialize<Button>(Button btn)
            DataContractSerializer s = new DataContractSerializer(typeof(Button));
            MemoryStream ms = new MemoryStream();
            s.WriteObject(ms, btn);
            return ms;

Why its showing the following error

Cannot convert type 'System.IO.MemoryStream' to 'System.Web.UI.WebControls.Button'
Updated 25-Nov-11 10:40am
RaviRanjanKr 25-Nov-11 15:42pm    
A suggestion :- Always wrap your code in "Pre" tag.
rajh7 25-Nov-11 15:44pm    
what does it mean? could you show me please
Sergey Alexandrovich Kryukov 25-Nov-11 15:52pm    
Please use "Improve question" and look at the formatting of the code as Ravi did for you. Do you know HTML, anyway?
Sergey Alexandrovich Kryukov 25-Nov-11 16:01pm    
Please check up: it looks like the posted code and the code showing this error are different.
Indicate the on which where the exception is reported.

1 solution

The return of your call to: Serialize<button>(btn): is a System.IO.MemoryStream object that holds the serialized form of the Button.

You can't just "cast" that back to the Button object itself.

You have to de-serialize the MemoryStream. You can use the same DataContractSerializer you use to serialize, but, in MS' words: "To retrieve data, create an object appropriate to reading the data format (such as an XmlDictionaryReader for an XML document) and call the ReadObject method."

best, Bill
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