Save position and size of ColumnHeader automaticly
I you want to save automaticly position and size of Columnheader for a ListView you can use this AttachedProperty
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public class ListViewHelper { #region API [DllImport("kernel32")] private static extern long WritePrivateProfileString(string section, string key, string val, string filePath); [DllImport("kernel32")] private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath); private static void IniWrite(string path, string section, string key, string value) { WritePrivateProfileString(section, key, value, path); } private static string IniRead(string path, string section, string key) { StringBuilder temp = new StringBuilder(255); int i = GetPrivateProfileString(section, key, "", temp, 255, path); return temp.ToString(); } #endregion #region const & record private const string KEY_COL = "cols"; private const string KEY_SIZ = "sizes"; private record struct Parameter(bool UseIni, string Compagny, string Product, string FileIni, RegistryKey? RegistryKey); #endregion #region static parameter (UseIni dfefault = true // set in app.cs or before first InitializeComponent(); public static bool UseIni { get; set; } = true; #endregion #region SaveColumnPositionID public static string GetSaveColumnPositionID(DependencyObject obj) => (string)obj.GetValue(SaveColumnPositionIDProperty); public static void SetSaveColumnPositionID(DependencyObject obj, string value) => obj.SetValue(SaveColumnPositionIDProperty, value); public static readonly DependencyProperty SaveColumnPositionIDProperty = DependencyProperty.RegisterAttached("SaveColumnPositionID", typeof(string), typeof(ListViewHelper), new PropertyMetadata(null, (ss, ee) => { if (ss is ListView lv) { #region informations compagny & product var param = new Parameter(UseIni, "", "", "", null); var vi = FileVersionInfo.GetVersionInfo(Assembly.GetEntryAssembly().Location); param.Compagny = vi.CompanyName ?? "[Common]"; param.Product = vi.ProductName; #endregion #region For IniFile if (UseIni) { // localisation %APPDATA%\[compagny]\[product].ini // [ID] // cols = 3 | 2 | 1 | 0 | // sizes = NaN | 64.4 | 208.17660377358487 | NaN | var dirIni = System.IO.Path.Combine( Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), $"{param.Compagny}"); if (!System.IO.Directory.Exists(dirIni)) { System.IO.Directory.CreateDirectory(dirIni); } var fileNameIni = $"{param.Product}.ini"; param.FileIni = System.IO.Path.Combine(dirIni, fileNameIni); #if SHOW Debug.WriteLine($"Chemin = {param.FileIni}"); #endif } #endregion #region use registry else { // localisation Computer\HKEY_CURRENT_USER\SOFTWARE\{compagny]\[product]\[Id] // key cols // key sizes var rk = Registry.CurrentUser.CreateSubKey(@$"SOFTWARE\{param.Compagny}"); param.RegistryKey = rk.CreateSubKey($"{param.Product}"); } #endregion #region LayoutUpdated bool firstUpdated = true; lv.LayoutUpdated += delegate { if (firstUpdated) { firstUpdated = false; #region Get Column & create list if (FindChild<GridViewHeaderRowPresenter>(lv) is GridViewHeaderRowPresenter gvhrp) { #region set ColumID int i = 0; foreach (var c in gvhrp.Columns) { SetColumnID(c, i++); } #endregion string cols = "", sizes = ""; #region IniFile if (UseIni) { if (System.IO.File.Exists(param.FileIni)) { (cols, sizes) = ReadIni(param, (string)ee.NewValue); } } #endregion #region Use registry else { (cols, sizes) = ReadRegistry(param, (string)ee.NewValue); } #endregion SetColumnsValues(gvhrp.Columns, cols, sizes); }; lv.Loaded += delegate { // connecty for change var gvhrp = FindChild<GridViewHeaderRowPresenter>(lv); var pd = DependencyPropertyDescriptor.FromProperty(GridViewColumn.WidthProperty, typeof(GridViewColumn)); foreach (var c in gvhrp.Columns) { pd.AddValueChanged(c, delegate { UpdateDatas(param, (string)ee.NewValue, gvhrp.Columns); }); } // notification if change gvhrp.Columns.CollectionChanged += delegate { UpdateDatas(param, (string)ee.NewValue, gvhrp.Columns); }; }; #endregion #region - Local functions ----------------------------------------- void UpdateDatas(Parameter param, string id, GridViewColumnCollection collection) { if (param.UseIni) { WriteIni(param, id, collection); } else { WriteRegistry(param, id, collection); } } #region For Ini file (string col, string size) ReadIni(Parameter param, string id) { string cols = IniRead(param.FileIni, id, KEY_COL); string sizes = IniRead(param.FileIni, id, KEY_SIZ); #if SHOW Debug.WriteLine($"colonnes = {cols}"); Debug.WriteLine($"size = {sizes}"); #endif return (cols, sizes); } void WriteIni(Parameter param, string id, GridViewColumnCollection collection) { var (cols, sizes) = GetColumnsValues(collection); IniWrite(param.FileIni, id, KEY_COL, cols); IniWrite(param.FileIni, id, KEY_SIZ, sizes); } #endregion #region For registry (string col, string size) ReadRegistry(Parameter param, string id) { RegistryKey rk = param.RegistryKey.CreateSubKey(id); string cols = (string)rk.GetValue(KEY_COL); string sizes = (string)rk.GetValue(KEY_SIZ); #if SHOW Debug.WriteLine($"colonnes = {cols}"); Debug.WriteLine($"size = {sizes}"); #endif return (cols, sizes); } void WriteRegistry(Parameter param, string id, GridViewColumnCollection collection) { var (cols, sizes) = GetColumnsValues(collection); RegistryKey rk = param.RegistryKey.CreateSubKey(id); rk.SetValue(KEY_COL, cols); rk.SetValue(KEY_SIZ, sizes); } #endregion #region colum set and get (string col, string size) GetColumnsValues(GridViewColumnCollection collection) { string cols = "", sizes = ""; foreach (var c in collection) { cols += GetColumnID(c) + "|"; sizes += c.Width.ToString(CultureInfo.InvariantCulture) + "|"; } #if SHOW Debug.WriteLine($"colonnes = {cols}"); Debug.WriteLine($"size = {sizes}"); #endif return (cols, sizes); } void SetColumnsValues(GridViewColumnCollection collection, string cols, string sizes) { string[] colsSort = cols?.Split('|'); string[] sizesWidth = sizes?.Split('|'); if (colsSort != null && sizesWidth != null && collection.Count == colsSort.Length - 1 && colsSort.Length == sizesWidth.Length) { var colsList = new List<GridViewColumn>(); foreach (var item in collection) { colsList.Add(item); } gvhrp.Columns.Clear(); for (int index = 0; index < colsSort.Length - 1; index++) { try { int pos = int.Parse(colsSort[index]); gvhrp.Columns.Add(colsList[pos]); if (!sizesWidth[index].ToLower().Equals("nan")) { colsList[pos].Width = double.Parse(sizesWidth[index], CultureInfo.InvariantCulture); } } catch { } } } } #endregion #endregion } }; #endregion } })); #endregion #region ColumnID (private used only by SavecolumPositionID) private static int GetColumnID(DependencyObject obj) => (int)obj.GetValue(ColumnIDProperty); private static void SetColumnID(DependencyObject obj, int value) => obj.SetValue(ColumnIDProperty, value); private static readonly DependencyProperty ColumnIDProperty = DependencyProperty.RegisterAttached("ColumnID", typeof(int), typeof(ListViewHelper), new PropertyMetadata(0)); #endregion #region STATIC private static T FindChild<T>(DependencyObject parent, string childName = null) where T : DependencyObject { if (parent == null) return null; T foundChild = null; int childrenCount = VisualTreeHelper.GetChildrenCount(parent); for (int i = 0; i < childrenCount; i++) { var child = VisualTreeHelper.GetChild(parent, i); T childType = child as T; if (childType == null) { foundChild = FindChild<T>(child, childName); if (foundChild != null) break; } else if (!string.IsNullOrEmpty(childName)) { var frameworkElement = child as FrameworkElement; if (frameworkElement != null && frameworkElement.Name == childName) { foundChild = (T)child; break; } } else { foundChild = (T)child; break; } } return foundChild; } #endregion } |
and use like
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<ListView x:Name="lv" BorderThickness="1" ItemsSource="{Binding Missions}" Height="149" local:ListViewHelper.SaveColumnPositionID="first" VerticalAlignment="Top"> <ListView.View> <GridView> <GridViewColumn Header=" A " DisplayMemberBinding="{Binding Number}" /> <GridViewColumn Header=" B " DisplayMemberBinding="{Binding Status}" /> <GridViewColumn Header=" C " DisplayMemberBinding="{Binding Status}" /> <GridViewColumn Header=" D" DisplayMemberBinding="{Binding Status}"> </GridViewColumn> </GridView> </ListView.View> |
the SaveColumnPositionID is the uniq Id of ListView for saving
two possibilities
- first in ini file (by default)
%APPDATA%\[compagny]\[product].ini
// [ID]
// cols = 3|2|1|0|
// sizes = NaN|64.4|208.17660377358487|NaN|
- second in Registry
Computer\HKEY_CURRENT_USER\SOFTWARE\[compagny]\[product]\[Id]
// key cols = 3|2|1|0|
// key sizes = NaN|64.4|208.17660377358487|NaN|
for switch to registry you must insert this code
ListViewHelper.UseIni = false;
before all (in app for sample)
InitializeComponent();
this parameter is Global for all application
and you must have a different SaveColumnPositionID for each ListView
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