Remove duplicates from combobox which is bind to dataset

问题

I have a xml file in my project. I am reading the file through the below code in to combobox cbProduct. The problem is that the cbProduct is displaying duplicate text values. How to make them distinct?

I have gone through some links but there way of approach is not related to dataset.
I implemented the below code:

DataSet ds = new DataSet();
ds.ReadXml(@"..\..\stock.xml");
cbProduct.DataSource = ds.Tables[0];
cbProduct.DisplayMember = "productname";

optional: If you have time it will be appreciable if you explain the process because I am new to .net or provide a link atleast to refer (not msdn).

Please Help.
Thanks in advance.

回答1:

Do this

DataSet ds = new DataSet();
ds.ReadXml(@"..\..\stock.xml");
DataTable dt = ds.Tables[0].DefaultView.ToTable(true, "productname");
cbProduct.DataSource = dt;
cbProduct.DisplayMember = "productname";

Third code line creates a new table which will have distinct values based on productname column. For More read this

This code is here

回答2:

You can bring distinct values from database or you can get distinct values from c# data table into new c# data table and bind it to dropdown. How to select distinct value.

来源：https://stackoverflow.com/questions/12757138/remove-duplicates-from-combobox-which-is-bind-to-dataset