problem in call a method from class

Abolfazl

i have a class and a method that fill a listview with database records.when i call the method in form load it not works without any error.

but when i write method body in form load it works.i need to write this method and use it from another class.what should i do?

it's class and method code:

class accountinfo_show

{

public void main_list()

{

frm_main frm1 = new frm_main(); //object of main form

databaseDataContext db = new databaseDataContext();

var query = db.accountinfos;

for (int i = 0; i < query.Count(); i++)

{

var field = db.accountinfos.Where(c => c.id == i + 1).Single();

ListViewItem item = new ListViewItem(field.bankname.ToString());

item.SubItems.Add(field.banklocation.ToString());

item.SubItems.Add(field.accountnumber.ToString());

item.SubItems.Add(field.mojoodi.ToString());

frm1.lstv_main.Items.Add(item); //lstv=listview

}

in form load of frm_main i call main_list.

thanks

4 Replies

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Vulpes12y ago
Accepted answer
Try doing it like this:

class accountinfo_show
{
public void main_list(ListView lstv_main) //now takes a parameter
{
/* first line removed */
databaseDataContext db = new databaseDataContext();
var query = db.accountinfos;
for (int i = 0; i < query.Count(); i++)
{
var field = db.accountinfos.Where(c => c.id == i + 1).Single();
ListViewItem item = new ListViewItem(field.bankname.ToString());
item.SubItems.Add(field.banklocation.ToString());
item.SubItems.Add(field.accountnumber.ToString());
item.SubItems.Add(field.mojoodi.ToString());
lstv_main.Items.Add(item); // no longer need frm1
}
}
}

and call it in the form_Load handler of frm_main something like this:

var acinfo = new accountinfo_show();
acinfo.main_list(this.lstv_main);
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Abolfazl12y ago
thanks vulpes
0
Abolfazl12y ago
thanks but if i remove these code, class does not know lstv_main.
0
12y ago
Hi Abolfazl,
try below instructions
class accountinfo_show
{
public void main_list()
{
frm_main frm1 = new frm_main(); 1. Remove This line of Code
databaseDataContext db = new databaseDataContext();
var query = db.accountinfos;
for (int i = 0; i < query.Count(); i++)
{
var field = db.accountinfos.Where(c => c.id == i + 1).Single();
ListViewItem item = new ListViewItem(field.bankname.ToString());
item.SubItems.Add(field.banklocation.ToString());
item.SubItems.Add(field.accountnumber.ToString());
item.SubItems.Add(field.mojoodi.ToString());
frm1.lstv_main.Items.Add(item); 2. Remove This line of Code
lstv_main.Items.Add(item); 3. Add this line of Code
}
}
}
kindly accept as answer if it helps you.
0