DropDownList

[Mira Vizjak]

Hi
I looked everywhere to solve my problem but with no success. On page there
is a dropdownlist control which is binded to a database. When I select one
of the list item and press a button I would like to get the SelectedItem
property, but it is always set to Nothing. What should i do? On page load I
use Page.IsPostBack=false to load the dropdownlist only once.
Thanks!

Jure

[Sonali.NET[MVP]]

Have you set AutoPostBack =true of Ddl

Regards
Sushila
..NET MVP

"Mira Vizjak" <mira.vizjak1@guest.arnes.si> wrote in message news:berr1k$ljg$1@planja.arnes.si...

> Hi
> I looked everywhere to solve my problem but with no success. On page there
> is a dropdownlist control which is binded to a database. When I select one
> of the list item and press a button I would like to get the SelectedItem
> property, but it is always set to Nothing. What should i do? On page load I
> use Page.IsPostBack=false to load the dropdownlist only once.
> Thanks!
>
> Jure
>
>

[Mira Vizjak]

I don't want the page to reload so I can't use AutoPostBack=true.

[Souri Challa]

Did you set the 'EnableViewState' to true for the dropdownlist ?

"Mira Vizjak" <mira.vizjak1@guest.arnes.si> wrote in message
news:berr1k$ljg$1@planja.arnes.si...

> Hi
> I looked everywhere to solve my problem but with no success. On page there
> is a dropdownlist control which is binded to a database. When I select one
> of the list item and press a button I would like to get the SelectedItem
> property, but it is always set to Nothing. What should i do? On page load

I

> use Page.IsPostBack=false to load the dropdownlist only once.
> Thanks!
>
> Jure
>
>

[dj Bass]

the item in a check list has a value and item text, are you setting the item
value?

"Mira Vizjak" <mira.vizjak1@guest.arnes.si> wrote in message
news:berr1k$ljg$1@planja.arnes.si...

> Hi
> I looked everywhere to solve my problem but with no success. On page there
> is a dropdownlist control which is binded to a database. When I select one
> of the list item and press a button I would like to get the SelectedItem
> property, but it is always set to Nothing. What should i do? On page load

I

> use Page.IsPostBack=false to load the dropdownlist only once.
> Thanks!
>
> Jure
>
>

[abacnet]

Try this after DropDownList1.DataBind ():
DropDownList1.SelectedIndex =
DropDownList1.Items.IndexOf(DropDownList1.Items.Fi ndByValue(yourKnownAuthID)
)

What you need is basically set the selectedindex property.
But first you find the list item that has the known Author ID.
This (DropDownList1.Items.FindByValue(yourKnownAuthID)) returns a list item.
This (DropDownList1.Items.IndexOf) gets the index of the listItem element
with the known value.

"Srinivasa Reddy K Ganji" <gksreddy@adsgroup.com> wrote in message
news:%23TJ1mwzWDHA.1480@tk2msftngp13.phx.gbl...

> Hi,
>
> I have the following code in Page_Load. I know the author id and I want

that

> particular author to be shown as selected in the drop downlist when the

page

> loads. Can anyone suggest me how to do this.
>
> string dsn = ConfigurationSettings.AppSettings["testDsn"];
> SqlConnection connection = new SqlConnection (dsn);
> SqlDataAdapter adapter = new SqlDataAdapter ("select * from authors",
> connection);
> DataSet ds = new DataSet ();
> adapter.Fill (ds, "authors");
> DropDownList1.DataSource = ds;
> DropDownList1.DataTextField = "au_fname";
> DropDownList1.DataValueField = "au_id";
> DropDownList1.DataBind ();
>
> Thanks,
>
>
> Reddy
>
>

[Reddy]

That worked. Thanks a lot


"abacnet" <abacnet@hotmail.com> wrote in message
news:uVQ6u3zWDHA.1580@tk2msftngp13.phx.gbl...

> Try this after DropDownList1.DataBind ():
> DropDownList1.SelectedIndex =
>

DropDownList1.Items.IndexOf(DropDownList1.Items.Fi ndByValue(yourKnownAuthID)

> )
>
> What you need is basically set the selectedindex property.
> But first you find the list item that has the known Author ID.
> This (DropDownList1.Items.FindByValue(yourKnownAuthID)) returns a list

item.

> This (DropDownList1.Items.IndexOf) gets the index of the listItem element
> with the known value.
>
> "Srinivasa Reddy K Ganji" <gksreddy@adsgroup.com> wrote in message
> news:%23TJ1mwzWDHA.1480@tk2msftngp13.phx.gbl...

> > Hi,
> >
> > I have the following code in Page_Load. I know the author id and I want

> that

> > particular author to be shown as selected in the drop downlist when the

> page

> > loads. Can anyone suggest me how to do this.
> >
> > string dsn = ConfigurationSettings.AppSettings["testDsn"];
> > SqlConnection connection = new SqlConnection (dsn);
> > SqlDataAdapter adapter = new SqlDataAdapter ("select * from authors",
> > connection);
> > DataSet ds = new DataSet ();
> > adapter.Fill (ds, "authors");
> > DropDownList1.DataSource = ds;
> > DropDownList1.DataTextField = "au_fname";
> > DropDownList1.DataValueField = "au_id";
> > DropDownList1.DataBind ();
> >
> > Thanks,
> >
> >
> > Reddy
> >
> >

>
>

[Ana Rita]

Hello to all.

I´m trying to use a string, to build the ListItem's of a
DropDownList.

I declare a Public str as string in the webform1.aspx.vb,
and in the page load I build the string like this:

str = "<asp:ListItem value='0'>Blue</asp:ListItem>
<asp:ListItem value='1'>Red</asp:ListItem>"

In the webform1.aspx, html mode, I call the str within the
tag <asp:DropDownList>, like this <%str%>. As I expected,
it gives an error, saying that I can't use this type of
calls.

I want to Know, if it's possible to do something like we
do in asp to build a select object using a string with the
<options>.

Thank you all.

Best wishes.

Ana Rita

[anonymous]

In a drop down list you can assing the value from
recordset like this:
country.DataTextField = "country"
country.DataValueField = "Code"
What if I need to assign more value to a DataValueField
from a recordset. Something like this:
country.DataTextField = "country"
country.DataValueField(1) = "Code"
country.DataValueField(2) = "Code1"
How do I do this?

[Eliyahu Goldin]

Merge all values into one string and that parse it?

Eliyahu

"anonymous" <anonymous@discussions.microsoft.com> wrote in message
news:1fee301c4588f$11aaf280$a101280a@phx.gbl...

> In a drop down list you can assing the value from
> recordset like this:
> country.DataTextField = "country"
> country.DataValueField = "Code"
> What if I need to assign more value to a DataValueField
> from a recordset. Something like this:
> country.DataTextField = "country"
> country.DataValueField(1) = "Code"
> country.DataValueField(2) = "Code1"
> How do I do this?
>

[Marwa Bahaa]

Hi All,
I have an ASPX Page, and I want to create "Dropdown list" in the run time
and then upload its content to a database
Could any one help me on how to do this?

[Seelan]

Hello folks,
I have a database table with CategoryID, Name and Description. I
made 2 DropDown Lists one for Displaying Name and the other for
Description. I want to add a web control, lets say a simple Datagrid
that would display the CategoryID depending on the values selected
from the 2 drop down lists. Can some one help me with this please? C#
web forms would be very helpful.

sqlDataAdapter1.Fill(dsCategories11);
DataGrid1.DataBind();
DropDownList1.DataBind();
DropDownList2.DataBind(); //upto this
point data is binded to the ddlist and everything is fine...

sqlDataAdapter1.SelectCommand.CommandText="SELECT CategoryID FROM
Categories WHERE CategoryName="+DropDownList1.SelectedItem.ToString ();
sqlDataAdapter1.Fill(dsCategories121);
Datagrid2.DataBind();

//after this I get an error saying "Invalid Coloumn name 'Beverage'
which is the item selected in the drop down list 1.

Please help...
Thanks
Seelan

[EJD]

Hi,

I don't know what you're using for your database software, but just as
a suggestion, can you reproduce the full query string along with the
parameter 'Beverage' from the web page and run it in the DB software
itself?

I have a similar setup to yours but it's only using one DDL, and if I
change part of the query by adding a letter to one of the parameters,
say in your case making "CategoryName" into "CategoryName1," it would
give me the same error but instead of it saying "invalid column name
'beverage'" it would say invalid column name 'CategoryName1'.

You may want to check what your DDL1.DataMember equals as well...
I suppose it could also be that there is some kind of disconnect
between your query and your dsCategor*ies121...

HTH.

[Wojtek]

Hello


I have to dropdownlists on my page: one containing project names, second
containing project versions. I would like to refresh the contents of the
second dropdownlist right after the selected item in the first
dropdownlist is changed. I tried the SelectedIndexChanged event but it
didn't work.


Regards,

Wojtek

[Ray Costanzo [MVP]]

Please read this first:
[url]http://www.aspfaq.com/show.asp?id=2081[/url] (Specifically, bullet #2)

Then check this out:
[url]http://www.aspfaq.com/show.asp?id=2270[/url]

Ray at work

"Wojtek" <wojteku@forcom.com.pl> wrote in message
news:dc7ebr$1r3$1@inews.gazeta.pl...

> Hello
>
>
> I have to dropdownlists on my page: one containing project names, second
> containing project versions. I would like to refresh the contents of the
> second dropdownlist right after the selected item in the first
> dropdownlist is changed. I tried the SelectedIndexChanged event but it
> didn't work.
>
>
> Regards,
>
> Wojtek

[Wojtek]

Ray Costanzo [MVP] napisa³(a):

> Please read this first:
> [url]http://www.aspfaq.com/show.asp?id=2081[/url] (Specifically, bullet #2)
>
> Then check this out:
> [url]http://www.aspfaq.com/show.asp?id=2270[/url]
>
> Ray at work
>
> "Wojtek" <wojteku@forcom.com.pl> wrote in message
> news:dc7ebr$1r3$1@inews.gazeta.pl...
>

>>Hello
>>
>>
>>I have to dropdownlists on my page: one containing project names, second
>>containing project versions. I would like to refresh the contents of the
>>second dropdownlist right after the selected item in the first
>>dropdownlist is changed. I tried the SelectedIndexChanged event but it
>>didn't work.
>>
>>
>>Regards,
>>
>>Wojtek

>
>
>

I didn't mention, that I am using C#. I couldn't find any examples
except that using Javascript. Is it possible to achieve this using C#?

Regards,

Wojtek

[Ray Costanzo [MVP]]

In that case, you'd want to see an ASP.Net group. This is a classic ASP
group. Check out the groups with "aspnet" in their names and post there,
but still not until after reading [url]http://www.aspfaq.com/show.asp?id=2081[/url]!

Ray at work

"Wojtek" <wojteku@forcom.com.pl> wrote in message
news:dcam66$12f$1@inews.gazeta.pl...

> >
> >

>
> I didn't mention, that I am using C#. I couldn't find any examples
> except that using Javascript. Is it possible to achieve this using C#?
>
> Regards,
>
> Wojtek