我怎么能对的DevExpress的itemList中显示项目LookupEdit

Question

海所有，我在C＃.NET项目中使用的DevExpress LookupEdit，还同时设置显示部件和LookupEdit和物品的价值的成员属性不dispaying LookupEdit列表页面上，但我可以选择项目。选择一个项目后，所选项目在LookupEdit文本上显示。请帮助

lkpReference.Properties.DataSource = _lab.selectLabReference() ; 
lkpReference.Properties.DisplayMember = "refernce_name"; 
lkpReference.Properties.ValueMember = "lab_ref_id"; 
lkpReference.Properties.BestFitMode = BestFitMode.BestFit; 
lkpReference.Properties.SearchMode = SearchMode.AutoComplete; 

LookUpColumnInfoCollection collns = lkpReference.Properties.Columns; 

collns.Add(new LookUpColumnInfo("Lab Reference", 0)); 
lkpReference.Properties.AutoSearchColumnIndex = 1; 

Answer 1

lkpReference.Properties.DataSource = _lab.selectLabReference() ; 
lkpReference.Properties.DisplayMember = "refernce_name"; 
lkpReference.Properties.ValueMember = "lab_ref_id"; 
lkpReference.Properties.BestFitMode = BestFitMode.BestFit; 
lkpReference.Properties.SearchMode = SearchMode.AutoComplete; 

// the constructor you are using accepts 2 parameters: FieldName (which is the name 
// of the field from the DataTable) and Width (which is the width of the column 
// displayed in the dropdown). You have set both parameters wrong. 

//LookUpColumnInfoCollection collns = lkpReference.Properties.Columns; 
//collns.Add(new LookUpColumnInfo("Lab Reference", 0)); 

// what you intended to do is this 
lkpReference.Properties.Columns.Add(new LookUpColumnInfo("refernce_name", 100, "Lab Reference")); 

lkpReference.Properties.AutoSearchColumnIndex = 1;