Solved

c# winform get all rows from one column into dictionary and bind to list?

Posted on 2011-03-25
4
575 Views
Last Modified: 2013-12-17
hi all my code below should hopefully explain where im trying to get to if someone could point out the errors and put me in the right direction?

i want all the rows from the column Trades in the Trades Table and get them in a dictionary and bind them

Thanks
Dictionary<string, string> dictATrades = new Dictionary<string, string>();
            foreach (DataRow trade in dataSetMisc.Trades.Rows)
            {
                dictATrades.Add((string)(trade["Trades"]), (string)(trade["Trades"]));
            }
            var dictATradesSort = (from entry in dictATrades orderby entry.Value ascending select entry);

            lstAvailbleTrades.DataSource = new BindingSource(dictATradesSort, null);
            lstAvailbleTrades.DisplayMember = "Value";
            lstAvailbleTrades.ValueMember = "key";

Open in new window

0
Comment
Question by:awilderbeast
4 Comments
 
LVL 4

Accepted Solution

by:
RGBDart earned 250 total points
ID: 35216485
I'm not sure why you need dictionary?
Use list instead.

Replace
this code

Dictionary<string, string> dictATrades = new Dictionary<string, string>();
            foreach (DataRow trade in dataSetMisc.Trades.Rows)
            {
                dictATrades.Add((string)(trade["Trades"]), (string)(trade["Trades"]));
            }
            var dictATradesSort = (from entry in dictATrades orderby entry.Value ascending select entry);

Open in new window


with this one

List<string> dictATrades = (from DataRow trade in dataSetMisc.Trades.Rows select (string)(trade["Trades"])).ToList();
 dictATrades.Sort();

Open in new window

0
 
LVL 63

Assisted Solution

by:Fernando Soto
Fernando Soto earned 250 total points
ID: 35217594
Hi awilderbeast;

I also do not know why you need a Dictionary in this case. I tested your code out and it seems to work fine. Are you receiving errors?

If you are open to another way of doing this using a Dictionary Linq does a nice job.

Dictionary<string, string> dictATrades = ( from t in dataSetMisc.Trades.AsEnumerable( )
                                           orderby t.Field<String>( "Trades" )
                                           select new
                                           {
                                               Key = t.Field<String>( "Trades" ),
                                               Value = t.Field<String>( "Trades" )
                                           } ).ToDictionary( K => K.Key, V => V.Value );

Open in new window


Fernando
0
 
LVL 2

Expert Comment

by:ericpeckham
ID: 35219794
For one thing, you're putting the same value in both the key and value properties of each dictionary element.  Could that be why it's not working for you?
0
 
LVL 1

Author Closing Comment

by:awilderbeast
ID: 35231168
thanks
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Suggested Solutions

Today I had a very interesting conundrum that had to get solved quickly. Needless to say, it wasn't resolved quickly because when we needed it we were very rushed, but as soon as the conference call was over and I took a step back I saw the correct …
Entity Framework is a powerful tool to help you interact with the DataBase but still doesn't help much when we have a Stored Procedure that returns more than one resultset. The solution takes some of out-of-the-box thinking; read on!
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

685 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