c# - Updating DataGrid after deleting files -

i have wpf application shows , deletes subfiles in gridview after selecting folder folderbrowserdialog(). have datatable , filler() function display subfiles in datagrid. when user clicks button, files deleted. problem is, when delete files, datagrid not refresh. tried datagrid1.items.refresh(); dont know put it, did not worked. in winforms same code, did not encounter problem.here filler() function:

private void filler()         {             string[] files = directory.getfiles(@pathbox.text);              table = new datatable();             datagrid1.datacontext = null;              (int = 0; < files.length; i++)             {                 if (i == 0)                 {                     table.columns.add("name");                     table.columns.add("type");                     table.columns.add("size");                 }                  fileinfo information = new fileinfo(files[i]);                 filesysteminfo systeminformation = new fileinfo(files[i]);                 row = table.newrow();                 row["name"] = systeminformation.name;                 row["type"] = systeminformation.extension;                 row["size"] = (information.length / 1024).tostring();                 table.rows.add(row);               }             if (table.rows.count > 0)             {                 datagrid1.itemssource = table.defaultview;              }         } 

and delete part:

foreach (string file in files)                 {                     fileinfo tobedeleted = new fileinfo(file);                     if (tobedeleted.creationtime < datetime.now.addmilliseconds(-dayvalue))                         tobedeleted.delete();                 } 

thanks suggestions.

when deleting file, have remove row datatable also. in other way, have regenerate itemsource calling filter method. (but cost performance)