ErrorC2664:cannot convert parameter 3 from 'float' to 'System::Object __gc *'

[salaikumar]

Hello i am using datagrid control in Vc++.net.
when i set a float value to a cell, it returns the fol error.

my code is
***********
Datagrid->set_Item(1,1,System::Convert::ToSingle(textBox1->Text) );

Error
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error C2664: 'void System::Windows::Forms::DataGrid::set_Item(int,int,System::Object __gc *)' : cannot convert parameter 3 from 'float' to 'System::Object __gc *'

The datagrid columns are of float type.

otherwise if i use toString function,
Datagrid->set_Item(1,1,System::Convert::ToSingle(textBox1->Text) );
it compiles well but, returns runtime error, cannot convert from target type to primitive type..

Pls help me

[NoHero]

Conversion from reference types to value types requires an operation which is called boxing. Boxing creates a copy of the equivalent reference type of a given value type on the managed heap. The box operator (__box()) always returns System::Object*:

Datagrid->set_Item(1,1,__box(System::Convert::ToSingle(textBox1->Text)) );