小编Wah*_*hyu的帖子

我ListView在窗户上。该ListView的默认ItemsPanel被替换WrapPanel。我也有DataTemplate它的ListViewItem秒。在运行系统中，主窗口将在一段时间内不响应，因为它ListView具有700个（并不断增加）ListViewItem（来自数据绑定）。有没有办法使主窗口保持响应？

可选：ListView未准备好时，我希望在ProgressBar上方显示一条文本（或可能的话），ListView并说“请稍候...”或“正在加载物品...”之类的内容。

XAML：

 <ListView x:Name="MyListView" VirtualizingPanel.IsVirtualizing="True" VirtualizingPanel.VirtualizationMode="Recycling" HorizontalAlignment="Left"  Height="577" VerticalAlignment="Top" Width="902" ScrollViewer.HorizontalScrollBarVisibility="Auto" Foreground="Black" Margin="10,10,0,0" ScrollViewer.CanContentScroll="True" BorderBrush="#FFC54B4B" BorderThickness="3" Background="White">
                    <ListView.ItemsPanel>
                        <ItemsPanelTemplate>
                            <WrapPanel MaxWidth="{Binding (FrameworkElement.ActualWidth), 
                                RelativeSource={RelativeSource AncestorType=ScrollContentPresenter}}"
                                ItemWidth="{Binding (ListView.View).ItemWidth, 
                                RelativeSource={RelativeSource AncestorType=ListView}}"
                                MinWidth="{Binding ItemWidth, RelativeSource={RelativeSource Self}}"
                                ItemHeight="{Binding (ListView.View).ItemHeight, 
                                RelativeSource={RelativeSource AncestorType=ListView}}" />
                        </ItemsPanelTemplate>
                    </ListView.ItemsPanel>
</ListView>

编辑：

我尝试了这个：

List<something> MyList = new List<something>(); 

ThreadPool.QueueUserWorkItem(_ =>
      {

          ( Create MyList here...)

          Dispatcher.BeginInvoke(new Action(() => …

我有一些ListViewItem来自集合的 s，我创建了一个DataTemplate ，以便每个ListViewItem都有 aButton作为子控件：

<Window.Resources>
    <DataTemplate x:Key="ItemTemplate_AwesomeTemplate">
        <StackPanel Orientation="Vertical" VerticalAlignment="Stretch">
            <Button Content="Awesome Button" Click="Awesome_Button_Click" HorizontalContentAlignment="Center" VerticalAlignment="Bottom" FontWeight="Bold" Foreground="Black"/>
        </StackPanel>
    </DataTemplate>
</Window.Resources>

<ListView x:Name="AwesomeListView" HorizontalAlignment="Left"  Height="577" VerticalAlignment="Top" Width="934" ScrollViewer.HorizontalScrollBarVisibility="Visible" Foreground="Black" Margin="10,10,0,0">
  <ListView.View>
    <GridView>
       <GridViewColumn Header="AwesomeHeader" Width="250" CellTemplate="{StaticResource ItemTemplate_AwesomeTemplate}"/>
    </GridView>
  </ListView.View>
</ListView>

当我单击某个时Button，有没有办法更改包含单击IsSelected的属性？ListViewItemButton

using (var streamWriter = new StreamWriter(SomeRequest.GetRequestStream()))
{
    string json = JsonConvert.SerializeObject(new
    {
        Type_member1 = "StacOverFlow",
        Type_member2 = sometext,
        Type_member3 = 0,
        private = true
    });
    streamWriter.Write(json);
}

如您所见,有一个名为"private"的Type成员.当然,当我键入它时,会弹出一条消息并告诉我:

"无效的表达术语'私人'"

将"private"置于引号内将返回此错误:

"无效的匿名类型成员声明者.bla bla bla ..."

有办法解决这个问题吗？

我想将一个预定义的字符串数组写入file.txt,如下所示:

#include <unistd.h>
#include <fcntl.h>

int main(int argc, char *argv[])
{
    char *somestr[] = {"haha\n", "aww\n", "hmm\n", "hello\n", "there\n"};
    int filedesc = open("testfile.txt", O_WRONLY | O_APPEND | O_CREAT);
    for (int i = 0; i < 5; ++i) {
        write(filedesc, somestr[i], 24);
    }
    return 0;
}

这将创造testfile.txt.预期的文件内容:

haha
aww
hmm
hello
there

但是当我尝试时,它给出了一个奇怪的结果.实际内容:

haha\00aww\00hmm\00hello\00there\00aww\00hmm\00hello\00there\00testfihmm\00hello\00there\00testfile.txhello\00there\00testfile.txt\00\00there\00testfile.txt\00\00; 4\00\00\00