C＃WPF刷新ecran [英] C# WPF refresh ecran
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问题描述
您好
我的软件有问题
我需要在背景中用我的数据刷新我的屏幕并在完成时显示。
我有一个ObservableCollection：
Hello
I have a problem with my software
I need to refresh my screen with my datas in background and display when it's finish.
I have a ObservableCollection :
private ObservableCollection<CL_Operation> _lstOperations = new ObservableCollection<CL_Operation>();
public ObservableCollection<CL_Operation> LstOperations
{
get { return _lstOperations; }
set { _lstOperations = value; }
}
我将datacontext设置为公共MainWindow：
I set the datacontext in public MainWindow :
DataContext = this;
在我的虚空中，在我的for循环中，我用我的班级填写一份清单
In my void, in my for loop i fill a list with my class
for()
{
Application.Current.Dispatcher.Invoke(new Action(() => _lstOperations.Add(clOp)));
}
使用这种方法，我看到屏幕更改此数据
如果我在MainWindow中设置我的datacontext：
With this method, i see the screen change this data
if i set my datacontext in MainWindow :
DataContext = this;
当我刷新数据时，我看到屏幕填充并且滚动条变小
如果我将datacontext设置为null和我的函数中的这个：
When i refresh my datas, I see the screen fill and the scrollbar become smaller
If i set the datacontext to null and to this in my function :
Application.Current.Dispatcher.Invoke(new Action(() => this.DataContext = null))
for()
{
Application.Current.Dispatcher.Invoke(new Action(() => _lstOperations.Add(clOp)));
}
Application.Current.Dispatcher.Invoke(new Action(() => this.DataContext = this));
我的数据消失，屏幕变黑，我的数据出现。
我需要避免这两种行为。
我需要使用临时ObservableCollection来掩盖此更新
如何继续？
我尝试了什么：
在旧版本中：
我的绑定在XAML中是{Binding}：
my data disappear the screen turns black and my data appear.
I need to avoid these two behaviours.
I need to work with a temporary ObservableCollection to mask this update
How proceed ?
What I have tried:
In my old version :
My binding is {Binding} in XAML :
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:Plutus" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class="Plutus.MainWindow"
Title="MainWindow" Height="523.725" Width="898" Background="#FF3A3939" WindowStartupLocation="CenterScreen" WindowState="Maximized">
<window.resources>
<Setter Property="Width" Value="35"/>
<grid>
<grid.columndefinitions>
<ColumnDefinition />
<grid.rowdefinitions>
<RowDefinition Height="0.03*" />
<RowDefinition Height="0.04*" />
<RowDefinition Height="0.04*" />
<RowDefinition Height="0.88*"/>
<RowDefinition Height="0.02*" />
<ScrollViewer VerticalScrollBarVisibility="Auto" Grid.Row="3" >
<ItemsControl VerticalAlignment="Top" x:Name="lvDataBinding" HorizontalContentAlignment="Stretch" BorderThickness="0" Margin="10" Grid.Row="3" Background="{x:Null}" ItemsSource="{Binding}" Foreground="White">
<itemscontrol.itemtemplate>
<DataTemplate DataType="{x:Type local:CL_Operation}">
<Border BorderBrush="White" BorderThickness="1" CornerRadius="3" Margin="0,3" Grid.ColumnSpan="0" Background="Transparent" HorizontalAlignment="Left" VerticalAlignment="Top">
<Grid Width="{Binding strWidth}" Height="60" Background="Transparent" Margin="0,1">
<grid.columndefinitions>
<ColumnDefinition Width="0.06*" />
<ColumnDefinition Width="0.09*" />
<ColumnDefinition Width="0.1*" />
<ColumnDefinition Width="0.12*" />
<ColumnDefinition Width="0.1*" />
<ColumnDefinition Width="0.1*" />
<ColumnDefinition Width="0.1*" />
<ColumnDefinition Width="0.05*" />
<ColumnDefinition Width="0.05*" />
<ColumnDefinition Width="0.05*" />
<ColumnDefinition Width="0.05*" />
<ColumnDefinition Width="0.03*" />
<grid.rowdefinitions>
<RowDefinition />
<RowDefinition />
<RowDefinition />
<UniformGrid Tag="{Binding strRueck}" Grid.Column="0" Grid.Row="0" Grid.RowSpan="2" MouseLeftButtonUp="Test" >
<uniformgrid.style>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" Value="White"/>
</trigger>
<Trigger Property="IsMouseOver" Value="false">
<Setter Property="Background" Value="{Binding scbBackColor}"/>
</trigger>
</style.Triggers>
<TextBlock Text="{Binding strPriorite}" FontSize="36" Foreground="Red" HorizontalAlignment="Center" VerticalAlignment="Center" FontWeight="Bold"/>
<UniformGrid Grid.Column="0" Grid.Row="2" Background="{Binding scbBackColor}" MouseLeftButtonUp="Test" >
<TextBlock Text="{Binding strSsSect}" FontSize="14" Foreground="Black" HorizontalAlignment="Right" VerticalAlignment="Bottom" FontWeight="Bold" />
<UniformGrid Grid.Column="1" Grid.Row="0" Grid.RowSpan="3">
<TextBlock Text="{Binding strRetardAvanceText}" FontSize="28" Foreground="{Binding scbColorRetardAvance}" FontWeight="Bold" HorizontalAlignment="Center" VerticalAlignment="Center" />
<UniformGrid Grid.Column="2" Grid.Row="0" Grid.ColumnSpan="2" Grid.RowSpan="2">
<uniformgrid.style>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" Value="Gray"/>
</trigger>
</style.Triggers>
<TextBlock Tag="{Binding strRueck}" Foreground="{Binding scbColorNumOfOp}" Text="{Binding strNoOfOp}" FontSize="26" FontWeight="Bold" MouseLeftButtonUp="Test"/>
<UniformGrid Grid.Column="2" Grid.Row="2" Grid.ColumnSpan="3">
<TextBlock Text="{Binding strDescriptionOp}" FontSize="14" Foreground="White"/>
<UniformGrid Grid.Column="4" Grid.Row="0">
<TextBlock Text="{Binding strNoArticle}" FontSize="14" Foreground="White"/>
<UniformGrid Grid.Column="4" Grid.Row="1">
<TextBlock Text="{Binding strDateFormatee}" FontSize="14" Foreground="White"/>
<UniformGrid Grid.Column="5" Grid.Row="0">
<TextBlock Text="{Binding strPcesPoste}" FontSize="14" Foreground="White"/>
<UniformGrid Grid.Column="5" Grid.Row="1">
<TextBlock Text="{Binding strTpsPoste}" FontSize="14" Foreground="White"/>
<UniformGrid Grid.Column="6" Grid.Row="0">
<TextBlock Text="{Binding strTempsPoste}" FontSize="14" Foreground="White"/>
<UniformGrid Grid.Column="6" Grid.Row="1">
<TextBlock Text="{Binding strClient}" FontSize="14" Foreground="White"/>
<UniformGrid Grid.Column="5" Grid.Row="2" Grid.ColumnSpan="3">
<TextBlock Text="{Binding strTypeOp}" FontSize="14" Foreground="White"/>
<UniformGrid Grid.Column="9" Grid.Row="3">
<TextBlock Text="{Binding strAuart}" FontSize="12" Foreground="White" FontWeight="Bold"/>
<itemscontrol.itemspanel>
<itemspaneltemplate>
<UniformGrid Columns="2"/>
在我的c＃代码中你可以看到，我填充了一个临时列表，当它没问题时，我发送第二个列表发送绑定：
In my c# code you can see, i filled a temp list, when it's ok, i send in second list to send in binding :
public partial class MainWindow : Window
{
public ObservableCollection<cl_operation> lstOperationsTemp = new ObservableCollection<cl_operation>();
public List<string> lstSelectedLignesChoisi = new List<string>();
public List<string> lstSelectedIlotsChoisi = new List<string>();
public List<string> lstPostesTravailChoisi = new List<string>();
DispatcherTimer dtTimer = new DispatcherTimer();
DataTable dtOps = new DataTable();
DataView dvOps = new DataView();
Thread thrGetList;
string connectionString = "Data Source=SERVER\\INSTANCE;Initial Catalog=DB;Integrated Security=True";
string strOrderBy;
string strResultTri;
string strWhere;
string strWhereLigne;
string strWhereIlot;
string strWherePosteTravail;
int iTimer = 30;
public MainWindow()
{
InitializeComponent();
dtTimer.Tick += new EventHandler(timer_Tick);
dtTimer.Interval = new TimeSpan(0, 0, 1);
//dtTimer.Start();
thrGetList = new Thread(GetList);
thrGetList.Start();
}
public CL_Operation clOp { get; set; }
public void GetList()
{
dvOps = dtOps.DefaultView;
Application.Current.Dispatcher.Invoke(new Action(() => lstOperationsTemp.Clear()));
dtOps.Clear();
string strQueryDatas;
SqlConnection con = new SqlConnection(connectionString);
strQueryDatas = "SELECT * FROM [DB].[dbo].[VIEW] " + strWhere + " " + strOrderBy;
SqlDataAdapter adOps = new SqlDataAdapter(strQueryDatas, con);
adOps.Dispose();
try
{
con.Open();
SqlCommand sqlCmd = new SqlCommand(strQueryDatas, con);
sqlCmd.CommandTimeout = 500;
adOps.SelectCommand = sqlCmd;
adOps.Fill(dtOps);
adOps.Dispose();
sqlCmd.Dispose();
con.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
DateTime dtNow = DateTime.Now;
double dblTotalQte = 0;
double dblTotalOp = 0;
double dblTotalTemps=0;
for (int i = 0; i < dvOps.Count; i++)
{
clOp = new CL_Operation();
clOp.strWidth = Convert.ToString(Convert.ToInt32(System.Windows.SystemParameters.PrimaryScreenWidth) / 2);
clOp.strNoOfOp = dvOps[i]["NumOF"].ToString().Trim() + " - " + dvOps[i]["NumOP"].ToString().Trim();
clOp.strAuart = dvOps[i]["AUART"].ToString().Trim();
clOp.strMaufnr = dvOps[i]["MAUFNR"].ToString().Trim();
clOp.strCodeLigne = dvOps[i]["CodeLigne"].ToString().Trim();
//clOp.strNumOp = dvOps[i]["NumOP"].ToString().Trim();
clOp.strRueck = dvOps[i]["RUECK"].ToString().Trim();
clOp.strDescriptionOp = dvOps[i]["DesOpe"].ToString().Trim();
clOp.strNoArticle = dvOps[i]["NumArt"].ToString().Trim();
clOp.strDateFormatee = dvOps[i]["DateFormatee"].ToString().Trim();
clOp.strPcesPoste = Convert.ToString(Convert.ToDouble(String.Format("{0:0}", dvOps[i]["QtePoste"].ToString().Trim()))) + " pces";
clOp.strTpsPoste = Convert.ToString(Convert.ToDouble(String.Format("{0:0.00}", dvOps[i]["TpsChargePoste"].ToString()))) + " Hrs";
clOp.strClient = dvOps[i]["NomClientCourt"].ToString().Trim();
clOp.strTypeOp = dvOps[i]["MAKTX"].ToString();
clOp.strPriorite = dvOps[i]["PriorOF"].ToString();
clOp.strSsSect = dvOps[i]["SsSect"].ToString();
clOp.strDateDerBadge = Convert.ToDateTime(dvOps[i]["DatDerBadg"]);
// Here i sum my quantity
dblTotalQte += Convert.ToDouble(dvOps[i]["QtePoste"].ToString().Trim());
dblTotalTemps += Convert.ToDouble(dvOps[i]["TpsChargePoste"].ToString().Trim());
dblTotalOp++;
// I need to display this result in my label
clOp.strTotaux = "Nb OPs : " + dblTotalOp.ToString() + " Qte totale : " + dblTotalQte.ToString() + " Pces Temps total : " + dblTotalTemps + " Hrs";
Application.Current.Dispatcher.Invoke(new Action(() => lstOperationsTemp.Add(clOp)));
DateTime dtRetard = Convert.ToDateTime(clOp.strDateFormatee);
DateTime dtTempsPoste = Convert.ToDateTime(clOp.strDateDerBadge);
TimeSpan tRetard = dtNow.Date - dtRetard.Date;
TimeSpan tTempsPoste = dtNow - dtTempsPoste;
clOp.strRetardAvanceText = Convert.ToString(Math.Abs(Convert.ToDouble(tRetard.TotalDays))) + " jrs";
clOp.scbBackColor.Freeze();
clOp.scbColorRetardAvance.Freeze();
}
ObservableCollection<cl_operation> lstOperations = new ObservableCollection<cl_operation>(lstOperationsTemp);
Application.Current.Dispatcher.Invoke(new Action(() => this.DataContext = lstOperations));
}
private void Test(object sender, MouseButtonEventArgs e)
{
string str = ((TextBlock)sender).Tag.ToString();
MessageBox.Show(str);
foreach (var item in lstOperationsTemp)
{
if (item.strRueck == str)
{
MessageBox.Show(item.strNoOfOp);
break;
}
}
}
}
我的新朋友版本（https://www.codeproject.com/Questions/1206951/Csharp-WPF-use-binding-with-sum?pgnumcmt2_1207134=2#cmt2_1207134）我使用了带有datacontext的NotifyPropertyChanged。
listtemp的方法不起作用
In my new version (https://www.codeproject.com/Questions/1206951/Csharp-WPF-use-binding-with-sum?pgnumcmt2_1207134=2#cmt2_1207134) i used the NotifyPropertyChanged with datacontext this.
The method with listtemp don't work
推荐答案
你将DataContext归零，然后添加数据然后添加DataContext实际的WPF魔法随着INotifyCollectionChanged.CollectionChanged的提升而发生，你已经删除了WPF接收的能力。如果我是你，我会使用这个的变体[ ^ ]。基本上，放弃对DataContext本身的操作，并执行以下操作：
You're nulling out the DataContext, then adding the data and then adding the DataContext back in. The actual WPF magic happens with the raising of INotifyCollectionChanged.CollectionChanged, which you have removed the ability for WPF to receive. If I were you, I would use a variation of something like this[^]. Basically, drop your manipulation of the DataContext itself, and do this:
_lstOperations.AddRange(clOp);这将在最后引发一个重置通知，这将刷新您的具有更新信息的UI。
This will raise a single Reset notification at the end which will refresh your UI with the updated information.
这篇关于C＃WPF刷新ecran的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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