How to get the devexpress lookupedit display text from the corresponding edit value

Question

Hai all,

I want to get lookupedit display text when am giving correspond edit value.

example: if am giving

LookupEdit1.Editvalue="3";

then it should show display text of Editvalue="3"

please help

//code

 cmbChemical.Properties.DataSource = _lab.selectChemicals();
        cmbChemical.Properties.DisplayMember = "labitem_Name";
        cmbChemical.Properties.ValueMember = "labItem_ID";
        cmbChemical.Properties.BestFitMode = BestFitMode.BestFit;
        cmbChemical.Properties.SearchMode = SearchMode.AutoComplete;

        cmbChemical.Properties.Columns.Add(new LookUpColumnInfo("labitem_Name", 100,  "Chemicals"));
    cmbChemical.Properties.AutoSearchColumnIndex = 1;

Answer 1

You can't, at least not in the way you're trying. The LookUpEdit, as the name implies, looks up its values in a DataSource, eg. a collection of objects. Therefore, to display the value 3 you need to have a list of objects that contains this value and set it as a DataSource for the control.

List<string> values = new List<string>();
values.Add("3");
lookUpEdit.Properties.DataSource = values;
lookUpEdit.EditValue = "3";

Maybe if you specify what are you trying to do, we can help you achieve that.

Answer 2

I think you don't have to specify display member or value member to get your needed behaviour. Following code give me a form with the lookupedit correctly showing "4", and i can choose other values from the list too.

using System.Collections.Generic;
using System.Windows.Forms;
using DevExpress.XtraEditors;

public class Form1 : Form
{
    public Form1()
    {

        var lookUpEdit1 = new LookUpEdit();
        Controls.Add(lookUpEdit1);

        var source = new List<string>();
        for (var i = 0; i < 10;i++ )
            source.Add(i.ToString());
        lookUpEdit1.Properties.DataSource = source;
        lookUpEdit1.EditValue = "4";
    }

}

Maybe you get wrong results because you set display member and value member of the control.