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我有一个简单的列表视图，带有一个网格控件。我已经使用 observablecollection 将对象绑定到网格。inotifyPropertyChanged 在 setter 上实现。

网格有三列。在一个按钮上单击我加载了两列中包含一些数据行的网格。然后用户单击另一个按钮，我也在网格的第三列中添加了一些文本。问题是这个新文本只显示在网格中当前不在屏幕上的那些行上。如果我向下和向上滚动，其余的也会在它们离开滚动区域之外的屏幕区域时立即加载。

这可能是一个入门问题，但我已经尝试了我的代码的各种排列，并且搜索和阅读了文章但没有任何帮助。

XAML

<Window x:Class="MediaFolderCleanupTool.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" Height="392" Width="582">
    <Grid Height="340" Width="550">
        <Button Content="Search" Height="23" HorizontalAlignment="Left" Margin="12,38,0,0" Name="btnSearch" VerticalAlignment="Top" Width="75" Click="button1_Click" />
        <ListView ItemTemplate="{Binding FileItem}" Height="198" HorizontalAlignment="Left" Margin="14,67,0,0" Name="lstTargetFiles" VerticalAlignment="Top" Width="524" >
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="" Width="40">
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <CheckBox IsChecked="{Binding IsSelected}" Name="Select" IsThreeState="False"  Checked="CheckBox_Checked" Unchecked="CheckBox_Unchecked" />
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn>
                    <GridViewColumn Header="File"
                      Width="350"
               DisplayMemberBinding="{Binding Path=Name}" />
                    <GridViewColumn Header="Status"
                      Width="100"
               DisplayMemberBinding="{Binding Path=Status}" />
                </GridView>
            </ListView.View>
        </ListView>
        <Button Content="Delete" Height="23" HorizontalAlignment="Left" IsEnabled="False" Margin="13,306,0,0" Name="btnDelete" VerticalAlignment="Top" Width="75" Click="btnDelete_Click_1" />
        <Label Height="28" HorizontalAlignment="Left" Margin="16,271,0,0" Name="lblCount" VerticalAlignment="Top" Width="371" />
    </Grid>
</Window>

在屏幕上单击按钮，调用以下内容

private void DelFiles(ObservableCollection<FileItem> files)
        {

            foreach (FileItem fi in files)
            {
                try
                {
                    fi.Status = "Deleted";
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.InnerException);
                    fi.Status = "Error Deleting";
                }
            }
        }

这是 FileItem 类

class FileItem : INotifyPropertyChanged
    {

        public const string NamePropertyName = "CheckBoxState";

        private bool _checkboxstate = true;

        public string Name { get; set; }
        public string Status { get; set; }
        public bool IsSelected
        {
            get
            {
                return _checkboxstate;
            }
            set
            {
                if (_checkboxstate == value)
                {
                    return;
                }
                _checkboxstate = value;
                OnPropertyChanged(NamePropertyName);
            }


        }
        public event PropertyChangedEventHandler PropertyChanged;
        protected void OnPropertyChanged(string propertyName)
        {
            if (this.PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
4

1 回答 1

0

试试这个：

class FileItem : INotifyPropertyChanged
    {

        public const string NamePropertyName = "CheckBoxState";

        private bool _checkboxstate = true;

        public string Name { get; set; }

        string _status;     
        public string Status 
        { 
            get { return _status; } 
            set { _status = value; OnPropertyChanged("Status"); } 
        }

        public bool IsSelected
        {
            get
            {
                return _checkboxstate;
            }
            set
            {
                if (_checkboxstate == value)
                {
                    return;
                }
                _checkboxstate = value;
                OnPropertyChanged(NamePropertyName);
            }


        }
        public event PropertyChangedEventHandler PropertyChanged;
        protected void OnPropertyChanged(string propertyName)
        {
            if (this.PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
于 2012-11-08T19:36:20.777 回答