Retrieve comboBox displayed values

Question

I am trying to retrieve the displayed values of all items present in a comboBox.

First case: if the comboBox has been filled using a DataSource:

comboBox.DataSource = myDataSet.Tables[0]; comboBox.DisplayMember = "value"; comboBox.ValueMember = "id";

...I use this code:

foreach (DataRowView rowView in comboBox.Items) { String value = rowView.Row.ItemArray[1].ToString(); // 1 corresponds to the displayed members // Do something with value }

Second case: if the comboBox has been filled with the comboBox.Items.Add("blah blah"), I use the same code, except I have to look in the first dimension of the ItemArray:

foreach (DataRowView rowView in comboBox.Items) { String value = rowView.Row.ItemArray[0].ToString(); // 0 corresponds to the displayed members // Do something with value }

Now I would like to be able to retrieve all values without knowing the scheme used to fill the comboBox. Thus, I don't know if I have to use ItemArray[0] or ItemArray[1]. Is it possible? How could I do that?

I think you need comboBox1.SelectedText or comboBox1.SelectedValue — V4Vendetta
– V4Vendetta, Commented Sep 27, 2011 at 12:11
@V4Vendetta: I am not trying to get the selected item, but to loop through all items. — Otiel
– Otiel, Commented Sep 27, 2011 at 12:14

Jayanta Dey · Accepted Answer · 2011-09-27 12:37:14Z

You can try something like this:

 string displayedText; DataRowView drw = null; foreach (var item in comboBox1.Items) { drw = item as DataRowView; displayedText = null; if (drw != null) { displayedText = drw[comboBox1.DisplayMember].ToString(); } else if (item is string) { displayedText = item.ToString(); } }

Mamta D · Accepted Answer · 2011-09-27 12:28:02Z

The Combobox would be populated with the DataSource property in the first case. Therefore its DataSource won't be null. In the second case, it would be null. So you could do an if-else with (comboBox1.DataSource==null) and then accordingly use ItemArray[0] or ItemArray[1].

Grant Winney · Accepted Answer · 2011-09-27 12:27:50Z

Leito, you could check to see if the DataSource is a DataTable or not to determine which action to take.

if (comboBox.DataSource is DataTable) { // do something with ItemArray[1] } else { // do something with ItemArray[0] }

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