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> 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 : Publish your article
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; }
}
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