error C2440: 'argument' : cannot convert from 'System::Object ^' to 'int'

Question

this is my code:

for (q = 0; q < Rows; q++)
{
    for (r = 0; r < Columns; r++)
    {
        Array1[q, r] = combo1->Items[r];
        Array2[q, r] = combo2->Items[r];
    }
}

I want to add items in arrays from combo boxes but I am getting the error:

error C2440: 'argument' : cannot convert from 'System::Object ^' to 'int'

this is the code which is adding items in combo

            for (int m = 0; m < Rows; m++)
            {
                array<String^> ^b = Aray1[m]->Split(gcnew array<Char> { ',' });
                for each (String ^Column in b)
                {
                    Combo1->Items->Add(Column);
                }
            }

JaredPar JaredPar · Accepted Answer · 2010-12-08T22:17:45

Assuming that you're using C++/CLI.

Judging by the error it looks like the Array1 elements are typed to int and the combo box contains values wrapped in an ObjecT^. If the value is truly just an int being wrapped in an Object^ then you just need to unbox

Array1[q,r] = safe_cast<int>(combo1->Items[r]); 
Array2[q,r] = safe_cast<int>(combo2->Items[r]);

This will fall if the Object^ is actually wrapping another type besides int

error C2440: 'argument' : cannot convert from 'System::Object ^' to 'int'

1 Answers