Combobox selectedvalue

Question

I have a combobox on my form (winforms). In the properties I have set the DisplayMember and the ValueMember. DisplayMember = Name and ValueMember = ID. The Combobox is populated with the following objects:

public class MyObj { public string Name { get; set; } public int ID { get; set; } }

The Name displays fine in the dropdown(so DisplayMember is working) however, when I do:

mycombobox.SelectedValue it is ALWAYS null.

Does anyone know if I've forgotten to do anything?

It's on the click event of a button. I have also tried checking it on the SelectedIndexChanged event of the combobox itself but it didn't work there either. — AndrewC
– AndrewC, Commented Dec 10, 2010 at 11:50
if you do SelectedIndex or SelectedItem what do you get? can you add the code of how the combobox is configured and populated? — Sebastian Piu
– Sebastian Piu, Commented Dec 10, 2010 at 11:50
Try to swap ID and Name: DisplayMember = ID and ValueMember = Name and see if ID displays fine in the dropdown to make sure your datasource is fine. — Bolu
– Bolu, Commented Dec 10, 2010 at 11:53

Unmesh Kondolikar · Accepted Answer · 2010-12-10 11:54:11Z

Have you set the DataSource property. Also make sure that you have to set them in the correct order -

Set them in the following order -

1. DisplayMember 2. ValueMember 3. DataSource

See this link - http://social.msdn.microsoft.com/Forums/en/winformsdatacontrols/thread/211a46f5-5971-4ea2-a61d-84e389360909

Alternatively you can use the SelectedItem property to get the selected MyObj instance.

Thanks, I ended up just using the SelectedItem property and casting.

Sreekumar P · Accepted Answer · 2010-12-10 11:50:59Z

0

try SelectedItem

MyObj obj = (MyObj)mycombobox.SelectedItem;

answered Dec 10, 2010 at 11:50

Sreekumar P

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Comments

SeaDrive · Accepted Answer · 2010-12-10 17:37:08Z

Has an item been selected? Selected is not always the same as visible. Perhaps you really want to mycombobox.Text.

isxaker · Accepted Answer · 2013-08-12 07:15:29Z

I have similar mistake. I set DisplayMember and ValueMember, but i set instead of DataSource Items.Insert.

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