Solved

loop through multiple selection listbox

Posted on 2013-02-04
8
956 Views
Last Modified: 2013-02-04
I need to loop through a multiple selection listbox and retrieve selected values.

Three rows were selected. The following code goes to the first selected valuethree times.
 
 string strItems = "";
        foreach (ListItem row in lstKeyword.Items)  
        {
            if (row.Selected == true)
            {
                strItems = strItems + int.Parse(lstKeyword.SelectedValue.ToString()) + ",";
            }
        }

//strItems returns 1267,1267,1267,

How can I move to the next selected value?

Thanks,
0
Comment
Question by:Dovberman
  • 4
  • 2
  • 2
8 Comments
 
LVL 25

Accepted Solution

by:
Rouchie earned 200 total points
ID: 38850539
string strItems = "";
        foreach (ListItem row in lstKeyword.Items)  
        {
            if (row.Selected == true)
            {
                strItems = strItems + int.Parse(row.Value) + ",";
            }
        }
0
 
LVL 25

Expert Comment

by:Rouchie
ID: 38850545
ListControl.SelectedValue.ToString() always returns the first selected value, even if multiple items are selected.

So... you have to cast each one as a ListItem (like you have done) then refer to that respective item's Value property.
0
 
LVL 25

Expert Comment

by:Rouchie
ID: 38850557
Actually this is better because it avoids parsing to int then back to string, so less code to achieve the same result...

string strItems = "";
        foreach (ListItem row in lstKeyword.Items)  
        {
            if (row.Selected == true)
            {
                strItems = strItems + row.Value + ",";
            }
        } 

Open in new window

0
 
LVL 42

Assisted Solution

by:sedgwick
sedgwick earned 100 total points
ID: 38850573
string strItems = String.Join(",", lstKeyword.Items.Cast<ListItem>().Where(n=>n.Selected).Select(n=>n.Value).ToArray());

Open in new window

0
DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

 

Author Comment

by:Dovberman
ID: 38850607
So how do I go to the next selected item?
0
 
LVL 42

Expert Comment

by:sedgwick
ID: 38850613
This code returns all selected values concatenated in a single string
and separated with comma
0
 

Author Comment

by:Dovberman
ID: 38850618
Got it.

      string strItems = "";
        foreach (ListItem row in lstKeyword.Items)  
        {
            if (row.Selected == true)
            {
                strItems = strItems + int.Parse(row.Value) + ",";
            }
         }

Thanks
0
 
LVL 25

Expert Comment

by:Rouchie
ID: 38850619
That's what I posted (See above about the Int.Parse bit which you don't need)!
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For most people, the WrapPanel seems like a magic when they switch from WinForms to WPF. Most of us will think that the code that is used to write a control like that would be difficult. However, most of the work is done by the WPF engine, and the W…
User art_snob (http://www.experts-exchange.com/M_6114203.html) encountered strange behavior of Android Web browser on his Mobile Web site. It took a while to find the true cause. It happens so, that the Android Web browser (at least up to OS ver. 2.…
Along with being a a promotional video for my three-day Annielytics Dashboard Seminor, this Micro Tutorial is an intro to Google Analytics API data.
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…

895 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now