Combobox.Text Vs combobox.Selecteditem Vs combobox.selectValue?

Question

What is the difference between each of these? Can I use any of these methods to display the text of a combo box in label, or is there any difference?

label1.Text = comboBox1.SelectedItem.ToString();
label2.Text = comboBox1.Text;
label3.Text = comboBox1.SelectedValue.ToString();

I am testing these values of the Combo box, but I'm confused as to how they work. I want to display the text of a combo box in label. Using comboBox.Text it works fine but the remaining two give the following error:

error message:Object reference not set to an instance of an object.

Did you read their documentations first? And what is not working exactly? Any error message or exception? — Soner Gönül, Feb 04 '14 at 12:41

score 5 · Accepted Answer · edited May 23 '17 at 10:31

Here is my example.

private void comboSelectChanged(object sender, SelectionChangedEventArgs e)
{
  textBox1.Text = comboBox1.SelectedItem.ToString();
  textBox2.Text = comboBox1.Text;
  textBox3.Text = comboBox1.SelectedIndex.ToString();
}

Items collection: enter image description here

And the results:

One selected

Two selected

Three selected

SelectedItem: Gets or sets currently selected item in the ComboBox.
Based on ComboBox.SelectionChangeCommitted

Text: Gets or sets the text associated with this control. (Overrides Control.Text.)
setting the text value will change the current value of the combobox

SelectedValue: Gets or sets the value of the member property specified by the ValueMember property. (Inherited from ListControl.)
Based on ListControl.SelectedValueChanged

This question might be a duplicate of ComboBox SelectedItem vs SelectedValue.

Source msdn
Further reading at dotnetperls.

Thanks but give me any technical answer i am confuse – abdulmanan Feb 04 '14 at 12:54 — abdulmanan, Feb 04 '14 at 12:54

Combobox.Text Vs combobox.Selecteditem Vs combobox.selectValue?

1 Answers1

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