Problems programmatically setting multiple selections in a list box

[columbo2]

Hi all,

I have an array of values that I want to select in a multi selection listbox.
I've tried this, but it only ever shows one of the selecte d values...

(c#)
foreach (string itemstoselect in arrayofitems)
{
lbJobType.SelectedValue = itemstoselect;
}

Can anyone help, I have been surfing the web but cannot find the answer.

ta
C

 

[SiriusBlackOp]

The selected value property is not built to handle multi selected items. You need to loop through the items like this.

        Dim li As Web.UI.WebControls.ListItem
        For Each li In ListBox1.Items
            If li.Value = "your test" Then
                li.Selected = True
            End If
        Next

Senior Software Developer

http://www.scoutsft.com

 

[columbo2]

Hi , Thanks for your answer.
I can see what you're getting at, I need to cycle through each item in the listbox, compare it to each item in the array of values I want selected and select where there is a match.
The trouble is I am using c# and can't find a way to set the individual item to be selected.
Can anyone help?
thanks

 

[ca8msm]

The C# method should be exactly the same as the VB.NET method. At a guess, I'd say the syntax would be something like:

ListItem li;
foreach (li in ListBox1.Items) {
    if ((li.Value == "your test")) {
        li.Selected = true;
    }
}

------------------------------------------------------------

Mark,
[URL unfurl="true"]http://aspnetlibrary.com[/url]
[URL unfurl="true"]http://mdssolutions.co.uk[/url] - Delivering professional ASP.NET solutions

 

[SiriusBlackOp]

oops... I knew you needed C# and forgot to translate it.

My bad.


Senior Software Developer

http://www.scoutsft.com

 

[columbo2]

Hi SBO,
Thanks for your help.

I tried...

if ((dditems.Value == "Graduate")) {
dditems.Selected = true;
}

But it is telling me that it doesn't have a definition for '.Value' or '.Selected'

I've been looking through the intellisense list of options but can't find anything else.

Thanks
C

 

[SiriusBlackOp]

Why is your code labeled "dditems" (plural). You should be accessing a singular Item.

Senior Software Developer

http://www.scoutsft.com

 

[jmeckley]

dditems is a collection not a specific item.

foreach (string toFind in mystrings[])
{
   foreach (ListItem li in ListBox1.Items) 
   {
      if (li.Value == toFind )
      {
         li.Selected = true;
      }
   }
}

also make sure the ListBox1.Mode = Multiple (not single)

Jason Meckley
Programmer
Specialty Bakers, Inc.

 

[columbo2]

Hi All,
Thanks, I used similar to jasons code above and it still didn't work, but I think it was because I had the code in the onpageload event and the listbox in question was populated from a database table using a datasource in the HTML.
I think the above code was running before the listbox was populating so no matches were being made - so I populated the listbox in the onpageload event and it's working now.
Thanks for your help.
C

 

[jmeckley]

timing is everything

Jason Meckley
Programmer
Specialty Bakers, Inc.