Combo Box with distinct data

Question

0.00/5 (No votes)

See more:

I have a combo box with list of data.
i want to display the distinct value of data in ComboBox and with value member.

Below is my code:

List<templateentity> objTemp = null;
objTemp = (List<templateentity>)note.Body;
cmbDataset.DataSource = objTemp;
cmbDataset.DisplayMember = "DatasetName";
cmbDataset.ValueMember = "DatasetID";

Posted 23-Sep-13 20:51pm

connect2manas

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

sajjad hasanzadeh · Answer 1 · 2013-09-23T21:06:00

You can do this, (you may have to tweak it a bit to complie and work for you)

C#

ddlName.DataSource = items.Select(item=>item.Name).Distinct().ToList();
ddlName.DataBind();

ddlSize.DataSource = items.Select(item=>item.Size).Distinct().ToList();
ddlSize.DataBind();

ddlPrice.DataSource = items.Select(item=>item.Price).Distinct().ToList();
ddlPrice.DataBind();

And then find the itemID based on the selection of all three dropdown lists.

This is C# and assumes that you have LINQ

Hope this helps.

Edit-- (if no LINQ)

C#

IList<string> names = new List<string>();

foreach (Item item in Items)
    if (!names.Contains(item.Name))
        names.Add(name);

ddlName.DataSource = names;
ddlName.DataBind();
</string></string>

//Do similar for price and size.

Edit (use SQL commands)

SQL

select distinct Name from Item
select distinct Size from Item
select distinct Price from Item

connect2manas · Answer 2 · 2013-09-23T23:19:00

Solution 2

var filterData = objTemp.Select(x => new { DatasetID = x.DatasetID, DatasetName = x.DatasetName }).Distinct();
cmbdataset.DataSource = filterData.ToList()

Posted 23-Sep-13 23:19pm