LookUpEdit DisplayFormat格式字符串

Question

我有簡單的問題DevExpress LookUpEdit DisplayFormat。我想實現在lookUpEdit結果一樣：
文檔類型（.DOC）
文檔類型（的.docx）

const string defaultExtensionsList = "doc;docx;xlsx;xls;pdf;txt"; 
//... 
var column = new LookUpColumnInfo("Column", "Extensions") 
{ 
    Visible = true, 
    //FormatType = FormatType.Custom, 
    //FormatString ="Document type (*.{0})", 
    Alignment = HorzAlignment.Near 
}; 
ExtensionsLookup.Properties.DisplayFormat.FormatType = FormatType.Custom; 
ExtensionsLookup.Properties.DisplayFormat.FormatString = "Document type (*.{0})"; 
ExtensionsLookup.Properties.EditFormat.FormatType = FormatType.Custom; 
ExtensionsLookup.Properties.EditFormat.FormatString = "Document type (*.{0})"; 
ExtensionsLookup.Properties.Columns.Add(column); 

var bindingList = defaultExtensionsList.Split(';').ToList(); 
ExtensionsLookup.Properties.DataSource = bindingList; 

Answer 1

您可以使用下面的技巧（RepositoryItemLookUpEdit.GetNotInListValue事件）：

const string defaultExtensionsList = "doc;docx;xlsx;xls;pdf;txt"; 
//... 
var columnID = new LookUpColumnInfo("Column", "IDs") { Visible = false }; 
var columnToDisplay = new LookUpColumnInfo("Display", "Extensions"); 

lookUpEdit.Properties.Columns.AddRange(new LookUpColumnInfo[] { columnID, columnToDisplay }); 
lookUpEdit.Properties.ValueMember = "Column"; 
lookUpEdit.Properties.DisplayMember = "Display"; 
lookUpEdit.Properties.TextEditStyle = TextEditStyles.DisableTextEditor; 
lookUpEdit.Properties.GetNotInListValue += OnGetNotInListValue; 

var bindingList = defaultExtensionsList.Split(';').ToList(); 
lookUpEdit.Properties.DataSource = bindingList; 
//... 
void OnGetNotInListValue(object sender, GetNotInListValueEventArgs e) { 
    if(e.FieldName == "Display") 
     e.Value = string.Format("Document type (*.{0})", 
      ((IList<string>)lookUpEdit.Properties.DataSource)[e.RecordIndex]); 
} 

Answer 2

如果我沒有記錯，LookUpEdit不支持此功能。

我只是建立一個值爲「文檔類型（.docx）」，「文檔類型（ .xy）」的列表並將其綁定到控件。

喜歡的東西

var types = defaultExtensionsList.Split(';').Select(s => "DocumentType (*." + s + ")").ToList();