Manipulación de propiedad escrita como Lista

I have a Property which is of List Type as below.

private List<ListCOP_PAYLOAD> m_COP_DATA = new List<ListCOP_PAYLOAD>();
public List<ListCOP_PAYLOAD> COP_DATA
{
    get
    {
        return m_COP_DATA;
    }
    set
    { 
        m_COP_DATA = value;
        FireNewSMode_Data();
    }
}

Each time I add data I use the following:

m_exchangedata.COP_DATA = Mstruct.lMCOPStruct;

But it just increases the list size with the new data variables.

I want to clear the previous data so I used

m_exchangedata.COP_DATA.Clear();

Editado: I use it in this order 

 m_exchangedata.COP_DATA.Clear();
 m_exchangedata.COP_DATA = Mstruct.lMCOPStruct;

pero eso no parece funcionar.

I get InvalidOperationException : Sequence contains no elements.

The FireNewSMode_Data just fires off an event with the data if the event handler is not null.

Cualquier ayuda sería apreciada.

Gracias de antemano.

preguntado el 27 de noviembre de 13 a las 06:11

Puedes facilitar FireNewSMode_Data ¿método? -

does not seem to work -> this does not make much sense. -

1 Respuestas

Put a condition of count before clearing the COP_DATA lista:

if(m_exchangedata.COP_DATA.Count > 0)
{
    m_exchangedata.COP_DATA.Clear();
}
m_exchangedata.COP_DATA = Mstruct.lMCOPStruct;

respondido 27 nov., 13:07

Great comment and I used it earlier in the code. My problem was that both m_exchangedata and Mstruct are reference types so when I was clearing COP_DATA I was also clearing lMCOPStruct. I should have noticed that sooner. - C

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