Autopostback, binding and losing selection

[sklett]

Hi-

I'm a bit rusty cause it's been awhile since I've made an asp.net app, but
here is what I want to do:

single aspx page
bound DropDownList w/ autopost back that holds names of customers
DataGrid that shows customer data

When a user selects a customer from the drop down, I get the selected
value(customer ID) and store it into a member variable (mCustId) then I call
my BindData() method that uses that CustId to filter a DataTable and show
the correct data for that customer.

Everything works except when the Autopostback fires, I don't have the
correct selection in the DropDownList. This is because I'm calling
BindData() which also binds the DropDownList.

The problem is obvious and a basic solution is also obvious (call separate
function just to bind the grid) but this does not seem like a very flexible
solution. Is there some way to make the DropDownList's selectedItem value
persist?

Based on what I have described here(this MUST be a common approach) what is
the standard way to handle this?

Thanks for any tips or help!
Steve

[SHENG333]

There is no way to do like your describing.
You should not bind again the dropdownlist in the postback event.

I'm a bit rusty cause it's been awhile since I've made an asp.net app, but
here is what I want to do:

single aspx page
bound DropDownList w/ autopost back that holds names of customers
DataGrid that shows customer data

When a user selects a customer from the drop down, I get the selected
value(customer ID) and store it into a member variable (mCustId) then I call my BindData() method that uses that CustId to filter a DataTable and show
the correct data for that customer.

Everything works except when the Autopostback fires, I don't have the
correct selection in the DropDownList. This is because I'm calling
BindData() which also binds the DropDownList.

The problem is obvious and a basic solution is also obvious (call separate
function just to bind the grid) but this does not seem like a very flexible solution. Is there some way to make the DropDownList's selectedItem value
persist?

Based on what I have described here(this MUST be a common approach) what is the standard way to handle this?

Thanks for any tips or help!
Steve

[Steve]

OK, thanks for the response. Atleast I know I'm not missing anything now ;)
"SHENG333" <wh********@untsoft.com.cn> wrote in message
news:ea**************@TK2MSFTNGP12.phx.gbl...

There is no way to do like your describing.
You should not bind again the dropdownlist in the postback event.

I'm a bit rusty cause it's been awhile since I've made an asp.net app, but here is what I want to do:

single aspx page
bound DropDownList w/ autopost back that holds names of customers
DataGrid that shows customer data

When a user selects a customer from the drop down, I get the selected
value(customer ID) and store it into a member variable (mCustId) then I

call

my BindData() method that uses that CustId to filter a DataTable and show the correct data for that customer.

Everything works except when the Autopostback fires, I don't have the
correct selection in the DropDownList. This is because I'm calling
BindData() which also binds the DropDownList.

The problem is obvious and a basic solution is also obvious (call separate function just to bind the grid) but this does not seem like a very

flexible

solution. Is there some way to make the DropDownList's selectedItem value persist?

Based on what I have described here(this MUST be a common approach) what

is

the standard way to handle this?

Thanks for any tips or help!
Steve