Version Française News Contact Us Search Stories : > Constructor of type system.string not found (Design Time error) < Published on 4/12/2008 By Malek Chtioui (Xcess) When using a property grid in a .NET project (with custom server controls too) the message constructor of type system.string not found can occur on the design mode. To solve that, add this line on the top of your property : [Editor("System.Windows.Forms.Design.StringCollectionEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(System.Drawing.Design.UITypeEditor))] Exemple :                 private System.Collections.Generic.List<string> _Ilist;         [Editor("System.Windows.Forms.Design.StringCollectionEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(System.Drawing.Design.UITypeEditor))]         public System.Collections.Generic.List<string> Files_List         {             get             {                 return _Ilist;             }             set             {                 _Ilist = value;             }         }  Comments : re: Constructor of type system.string not found By Fred, Date: 4/12/2008 does anybody know how to have a property that contains a list of files (with the browse '...' at design time) Re: fred By Xcess (malek), Date: 4/12/2008 Hello, yes Fred : [PersistenceMode(PersistenceMode.InnerProperty), DefaultProperty("FileName")] public class File { public File() { } public File(string File_Name) { FileName = File_Name; } private string _fname = ""; [Bindable(true)] [DefaultValue("")] [Localizable(true)] [Editor(typeof(System.Web.UI.Design.UrlEditor), typeof(System.Drawing.Design.UITypeEditor))] public string FileName { get { return _fname; } set { _fname = value; } } } public class MM_FileNames : CollectionBase { public File this[int index] { get { return ((File)(List[index])); } set { List[index] = value; } } public int Add(File item) { return List.Add(item); } public void Insert(int index, File item) { List.Insert(index, item); } } use MM_FileNames in your class as a public property like this : private MM_FileNames _XFN = new MM_FileNames(); [NotifyParentProperty(true)] [PersistenceMode(PersistenceMode.InnerProperty)] [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public MM_FileNames Files_List { get { return _XFN; } } Inforamtion is power and now I'm a !@#$ing dictator. By Inforamtion is power and now I'm a !@#$ing dictato, Date: 4/2/2012 Inforamtion is power and now I'm a !@#$ing dictator. https://u4fifa.wordpress.com/ By u4fifa, Date: 6/5/2016 I do not know https://www.webwiki.com/u4fifa.com By u4fifa reviews, Date: 6/22/2016 You are looking sharp !  Add your Comment : Your Name : Email :    * Email address will be hidden. Title : Comment : Other articles Egypt Travel Guides  By Xcess, Date : 3/24/2007 Please make sure that your seat belt is securely fastened (Picture)  By MediaSeven, Date : 6/21/2007 How to send templated emails in Asp.Net 2.0  By Malek Chtiwi, Date : 4/11/2007 Travel Ethiopia - Historical, Caltural and Natural attraction  By Addis Ababa, Date : 5/30/2008 FED & SED Monitors; New technology 2009  By Chtioui Malek, Date : 5/2/2007 Top 5 Unlock your Nokia phone online for FREE.  By Xcess, Date : 4/1/2007 A Program That Can Fix Dead Pixels On Your LCD Screen.  By Malek Chtioui, Date : 6/14/2007 How to Find and Download MP3 Music from Internet?  By Malek Chtioui, Date : 6/19/2007 Pictures of Dubai, a New City In Full Expansion  By Malek Chtioui, Date : 6/12/2007 Request.Url parameters & details (Asp.net)  By Malek Chtioui (Xcess), Date : 4/7/2008