How to get selected value from DevExpress comboBox

Question

I'm trying to get the text from the selected value in the combo box by using:

lblMessage.Text = cmbArchivoModificado.SelectedItem.Text;

I've already set the valuefield and textfield on the combobox settings, but visual studio keep telling me this:

nullreferenceException was unhandled by user code.

Object reference not set to an instance of an object.

Please don't prefix your titles with "ASP.NET - c# - " and such. That's what the tags are for. — John Saunders, Dec 29 '11 at 21:25
Please show the code where the problem is occurring, and post the full exception output. Also, you may want to see http://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-in-net — John Saunders, Dec 29 '11 at 21:26

Mikhail · Answer 1 · 2011-12-31T07:33:38.977

Usually the problem, when the ASPxComboBox's SelectedItem / SelectedIndex is incorrect, occurs when the ASPxComboBox.ValueType property is specified incorrectly.

Ensure that the ValueType is set, corresponding to the "Data Type Mappings (ADO.NET)" table.

Try to use the ASPxComboBox.Value property instead:

lblMessage.Text = cmbArchivoModificado.Value != null
     ?  cmbArchivoModificado.Value.ToString()
     :  string.Empty;

score 0 · Answer 2 · answered Dec 07 '12 at 20:31

0

Looks to me like you need to first check whether cmbArchivoModificado.SelectedItem is null.

lblMessage.Text = cmbArchivoModificado.SelectedItem == null ? "NA" 
    : cmbArchivoModificado.SelectedItem.Text;

answered Dec 07 '12 at 20:31

Vyskol

298
3
11

score 0 · Answer 3 · answered Jan 27 '16 at 02:31

0

Get the value on this way:

var value = comboboxExample.SelectecText;

or

var value = comboboxExample.EditValue;

answered Jan 27 '16 at 02:31

xbral

91
4

How to get selected value from DevExpress comboBox

3 Answers3