entity framework cast back to objectcontex

Herry Ng

14y2.6kC#

hi, i want to ask is there a method/workaround using refrextion or else to cast control.datasource back to objectcontex.

My code:
//ERP_AR is entity framework model
ERP_AR oOC = new ERP_AR();
List oList = oOC.MyTable.ToList();

BindingSource bs =new BindingSource();
bs.DataSource = oList;

datagridview1.DataSource=bs;

//The issue is could i cast back datagridview1.DataSource back to oOC
BindingSource bs_temp;
bs_temp = (BindingSource) DataGridView1.DataSource; //SUCCESS cast back to binding source

ObjectContex oOC_Temp;
oOC_Temp = (ObjectContex) bs_temp;// --> NOT SUCCESS Cannot cast

Thx

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Herry Ng14y ago
thx for the info, i'll tried using form level variable thx again
0
Vulpes14y ago
You could get back to the List

List list_temp = (Listbs_temp.DataSource;

but, as far as I can see, it's impossible to get back to the ObjectContext itself.

If you need to refer it from a different method within the same form, I'd save it to a field (i.e. a form level variable) rather than to a local variable. It will then be available to all methods in the form:

private ERP_AR oOC = null;

// in some method
oOc = new ERP_AR();
List oList = oOC.MyTable.ToList();
// etc
0