FredGrit

2024年9月21日

WPF dynamically generate grid with calculated rows and columns, put the custom control in the specified cell of grid and never overlap or intersect

摘要： private void FillGridRandomly() { rowsColsSet = new HashSet<XY>(); if (gd != null) { gd.Children.Clear(); } for (int i = 0; i < 50; i++) { while (true 阅读全文

posted @ 2024-09-21 14:58 FredGrit 阅读(13) 评论(0) 推荐(0)

WPF Canvas show custom control with ellipse filled with image and text,peridoically update via System.Timers.Timer and toggle on pause resume via button

摘要： //custom control <UserControl x:Class="WpfApp389.ElpImageTbk" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schema 阅读全文

posted @ 2024-09-21 14:20 FredGrit 阅读(18) 评论(0) 推荐(0)

WPF ListBox ListBox.ItemTemplate DataTemplate Custom UserControl

摘要： <ListBox.ItemTemplate> <DataTemplate> <local:ImageTbk UCImgUrl="{Binding DataContext.ImgUrl, RelativeSource={RelativeSource Mode=FindAncestor,Ancestor 阅读全文

posted @ 2024-09-21 13:45 FredGrit 阅读(128) 评论(0) 推荐(0)

2024年9月20日

WPF ScrollViewer.IsDeferredScrollingEnabled is true can enhance the performance hugely when there is huge items and open virtualpanel

摘要： When an items control is using a virtualizing panel and it contains a large number of complex items, setting IsDeferredScrollingEnabled to true can re 阅读全文

posted @ 2024-09-20 17:31 FredGrit 阅读(21) 评论(0) 推荐(0)

WPF DataGrid ItemsSource StaticResource

摘要： //xaml <Window x:Class="WpfApp386.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/ 阅读全文

posted @ 2024-09-20 16:23 FredGrit 阅读(17) 评论(0) 推荐(0)

WPF data list acted as static resource

摘要： public class MyData : ObservableCollection<string> { public MyData() { for(int i=0;i<100000;i++) { Add($"{i+1}__{Guid.NewGuid().ToString("N")}"); } } 阅读全文

posted @ 2024-09-20 16:11 FredGrit 阅读(15) 评论(0) 推荐(0)

WPF behavior InvokeCommandAction CommadParameter pass selectedItem of currentcontrol

摘要： <ListBox x:Name="lbx" SelectedIndex="0" ItemsSource="{Binding BooksCollection,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" VirtualizingPanel.IsCo 阅读全文

posted @ 2024-09-20 11:46 FredGrit 阅读(16) 评论(0) 推荐(0)

WPF behavior InvokeCommandAction CommandParameter

摘要： <ListBox x:Name="lbx" SelectedIndex="0" ItemsSource="{Binding BooksCollection,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" VirtualizingPanel.IsCo 阅读全文

posted @ 2024-09-20 11:38 FredGrit 阅读(39) 评论(0) 推荐(0)

WPF behavior InvokeCommndAction PassEventArgsToCommand

摘要： //xaml <ListBox x:Name="lbx" SelectedIndex="0" ItemsSource="{Binding BooksCollection,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" VirtualizingPan 阅读全文

posted @ 2024-09-20 11:31 FredGrit 阅读(28) 评论(0) 推荐(0)

2024年9月19日

WPF System.Windows.Media.Color A value must be set, display ball and number in canvas ,mouse down to refresh

摘要： private Color GetRndColor() { Color cr = new Color(); cr.A = 255; cr.R = (byte)(rnd.Next(0, 255)); cr.G = (byte)(rnd.Next(0, 255)); cr.B = (byte)(rnd. 阅读全文

posted @ 2024-09-19 22:21 FredGrit 阅读(63) 评论(0) 推荐(0)

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