Depressed. . PostBack issues

wind7897

if(!IsPostBack)
{}
Change to
if(!Page.IsPostBack)
{}

terrysx

The code in (!IsPostBack) is not executed when returning
There should be something else.

kalian2000

What does the original poster mean?

Does it mean that after changing the item, execute this code again?

string strConn="Data Source=cnshangh601p;uid=accpac;pwd=accpac;Initial Catalog=ELSH";
SqlConnection sqlcn = new SqlConnection(strConn);
sqlcn.Open();
SqlCommand selectCmd2 = new SqlCommand("Select * From ReportUser where UserType=2",sqlcn);
SqlDataReader dr2;
dr2 = selectCmd2.ExecuteReader();
while (dr2.Read())
{
UserList.Items.Add(new ListItem(dr2["UserName"].ToString(),dr2["LogName"].ToString()));
}
dr2.Close();
sqlcn.Close();


If so, why use if (!IsPostBack)?
!IsPostBack means executed when the page is loaded for the first time...

Try removing this sentence...

Or I misunderstood what the original poster meant?

reuental

When my page is loaded, a LISTBOX project is generated through the database,
After executing the LISTBOX_INDEXCHANGE process, the items in the LISTbox are actually added again
However, the program did not perform any repeated addition process.
I just copied a copy of the items in the LISTBOX inexplicably

ypy0511

Try to disable viewstate

kalian2000

Dizzy, I read the wrong question...

TO: When my page is loaded, the LISTBOX project is generated through the database,
After executing the LISTBOX_INDEXCHANGE process, the items in the LISTbox are actually added again
However, the program did not perform any repeated addition process.
I just copied a copy of the items in the LISTBOX inexplicably


It's really strange...

Or change your mind..

Don't add it like this, directly bind the data in the database..

When updating, write back to the database first, and then rebind.

reuental

solved. .
I deleted the page and wrote it once. . .
normal now. . .

Well, it comes down to a foreign spirit event