Solved

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

Posted on 2011-03-25
4
570 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 62

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

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

In my previous two articles we discussed Binary Serialization (http://www.experts-exchange.com/A_4362.html) and XML Serialization (http://www.experts-exchange.com/A_4425.html). In this article we will try to know more about SOAP (Simple Object Acces…
More often than not, we developers are confronted with a need: a need to make some kind of magic happen via code. Whether it is for a client, for the boss, or for our own personal projects, the need must be satisfied. Most of the time, the Framework…
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.
Hi friends,  in this video  I'll show you how new windows 10 user can learn the using of windows 10. Thank you.

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

11 Experts available now in Live!

Get 1:1 Help Now