WPF DataGrid一些复选框在滚动时被重置

Question

I've got a C# WPF application with a datagrid. I have a custom class with a handful of public boolean properties, each with a get and set.

 public class OutlookPST
{
    public FileInfo PSTFileInfo { get; set; }   

    public Boolean Attached { get; set; }
    public Boolean FileLocal { get; set; }
    public Boolean LatestVersion { get; set; }
    public Boolean BackupExists { get; set; }
    public Boolean IgnoreDuplicate { get; set; }

    public Boolean CopyToLocalFlag { get; set; }
    public Boolean BackupToNetworkFlag { get; set; }  

In the xaml file, I have itemsource="Binding".

<DataGrid x:Name="dgPSTs" VirtualizingStackPanel.VirtualizationMode="Standard" VirtualizingStackPanel.IsVirtualizing="True" ItemsSource="{Binding}"  HorizontalAlignment="Left" Margin="10,121,0,0" VerticalAlignment="Top" Height="243" Width="1193"/>

I'm setting the datagrid ItemsSource property to a list of this custom class.

private void OutlookPSTToDatagrid(List<OutlookPST> PSTs)
    {
        try
        {   
            dgPSTs.ItemsSource = PSTs;

When I do this, all the initial data looks good. All the boolean flags are checkboxes, which is what I want. All the data is correct. When I scroll down, just two of the boolean flags get set to checked. And when I scroll back up, the first rows are also checked, when they weren't before.

I don't understand how it's working for some of the flags and not the others.

Anyone have any ideas? I can post some code if required. Just let me know what parts of the code.

Thanks!

Answer 1

Turns out the culprit was a pair of improperly formed lambda expressions elsewhere in the code:

if (outlookPSTs.Where(x => x.CopyToLocalFlag = true).Count() > 0)

instead of:

if (outlookPSTs.Where(x => x.CopyToLocalFlag == true).Count() > 0)

Same sort of thing for the other boolean flag.