更新：看起来datatemplate中的两行正在减慢速度。如果我只评论那两行，即
<Image Source="{Binding IconSelect}" Width="20" Height="20" />
和
<Image Source="{Binding IconBaseAcctFlag}" Width="20" Height="20" />
工作正常。在将列表呈现到列表视图时，知道为什么在datatemplate中使用这些图像会冻结GUI吗？
我有一个包含两个面板的表单。在左侧是树视图，当您单击一行时，它会检索此实体的相应数据，并在右侧构建一个摘要窗格，由列表视图表示。
我在后台线程上获取和处理数据，然后在最终调用中使用Application.Current.Dispatcher.Invoke（），将ListView的ItemsSource属性设置为我构建的集合。我本来希望这能维持一个非常灵敏的GUI，但在更新ItemsSource属性时，GUI会冻结大约1.5秒，而这种情况发生时我不知道为什么这么长时间。
我还尝试在开始时绑定一个空的ObservableCollection，然后在每次添加到集合时调用调度程序。这使得响应更快，但是面板逐行加载，它仍然不是我想要的性能，加上代码最终会因为这么多的调度程序调用而变得非常混乱。
有人可以在这里提出可能存在的问题吗？当然，您可以将具有大约12-20个条目的通用集合绑定到列表视图并立即更新它？
public void DisplayAcctSummary(RbcUIAccount selAcct)
{
if (selAcct == null)
{
ClearBaseAcctTransSummary();
return;
}
InvokeUpdate(() => gbBaseDetails.Header = "Account Details");
InvokeUpdate(() => lvBaseAccountDetails.ItemsSource = null);
SelBoolValueForSelectedQueue();
var lstBaseAcctDetails = new ObservableCollection<RbcUIBaseAcctDetails>();
if (selCustSummary != null)
{
var offsetAllowed = IsOffselAllowed(selAcct.Branch);
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Account No:", selAcct.AccountId));
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Account Name:", selAcct.AcctDesc));
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Account Type:", ((RbcEnums.AccountType)selAcct.AccountType).ToString()));
if (selAcct.Branch != string.Empty)
{
var rbcBranch = RbcStaticData.GetBranchbyID(selAcct.Branch.Trim());
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Branch:", rbcBranch.BranchName));
}
if (!IsInCURView && !IsInCURPendingView)
{
var serviceLayer = new RbcServiceLayer();
var account = serviceLayer.GetAccountById(selAcct.AccountId, UserSession.SecurityContext);
if (account != null)
{
if (account.BaseId != string.Empty)
{
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Current Balance:", selAcct.CurrentBalance, false, selAcct.DisplayUSDRate));
if (!offsetAllowed || (IsInCCMPView) || (IsInCCMPPendingView))
{
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Available Balance:", selAcct.AvailableBalance, false, selAcct.DisplayUSDRate));
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Available Funds:", selAcct.AvailableFunds, false, selAcct.DisplayUSDRate));
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Base Sublimit:", rbcUtils.DisplayAmount(selAcct.BaseSublimit)));
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Available Funds SL:", selAcct.AvailableFundsSL, false, selAcct.DisplayUSDRate));
}
if (!IsInCustomerEnquiryView && !offsetAllowed)
{
var excessToday = new RbcMoney();
var totAwtToday = SumTotalAwtForAccount(selAcct.AccountId);
var totAwtAllDates = SumTotalAwtAllDatesForAccount(selAcct.AccountId);
excessToday.Amount = totAwtToday.Amount - selAcct.AvailableFunds.Amount;
excessToday.Currency = totAwtToday.Currency;
if (excessToday.Amount < 0)
excessToday.Amount = 0;
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Total Awaiting Today:", new RbcMoney(Math.Round(totAwtToday.Amount), totAwtToday.Currency), false, selAcct.DisplayUSDRate));
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Total Excess Today:", new RbcMoney(Math.Round(excessToday.Amount), excessToday.Currency), false, selAcct.DisplayUSDRate));
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Total Awaiting All Dates:", new RbcMoney(Math.Round(totAwtAllDates.Amount), totAwtAllDates.Currency), false, selAcct.DisplayUSDRate));
if (customer.Category != Convert.ToByte((CustCategory.Today)))
{
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Total Awaiting Future:", selAcct.TotalAwaitingToday, false, selAcct.DisplayUSDRate));
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Total Excess Future:", selAcct.TotalExcessToday, false, selAcct.DisplayUSDRate));
}
}
}
else
{
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Current Balance", selAcct.CurrentBalance, false, selAcct.DisplayUSDRate));
if (!offsetAllowed && account.BaseId != string.Empty)
{
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Available Balance:", selAcct.AvailableBalance, false, selAcct.DisplayUSDRate));
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Available Funds:", selAcct.AvailableFunds, false, selAcct.DisplayUSDRate));
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Available Funds SL:", selAcct.AvailableFundsSL, false, selAcct.DisplayUSDRate));
}
}
}
if (IsInCCMPView || IsInCCMPPendingView)
{
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails(AppString.CustomerSummary.EarmarkPaymentDate, "0", true, string.Empty));
}
}
if (!IsInCURView && !IsInCustomerEnquiryView)
{
var txnCount = 0;
double totAmount = 0;
RbcUITransaction transaction;
foreach (var t in selAcct.Transactions)
{
transaction = t;
var amount = rbcUtils.GetAmountInCustomerCurency(transaction.Amount.Amount, transaction.Amount.Currency, customer.CustCurrencyId);
totAmount += amount;
txnCount++;
}
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("No of Txns:", txnCount.ToString()));
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Value of Txns:", new RbcMoney(totAmount, customer.CustCurrencyId), false, true));
lstBaseAcctDetails.Add(new RbcUIBaseAcctDetails("Last updated at:", selAcct.LastUpdatedAt.ToString("dd-MM-yyyy HH:mm") + " GMT"));
}
}
InvokeUpdate(() => lvBaseAccountDetails.ItemsSource = lstBaseAcctDetails);
}
更新：这是ListView的XAML
<ListView x:Name="lvBaseAccountDetails" Margin="10,10,10,10" Background="#F4F8FB" ItemsSource="{Binding}" MouseDoubleClick="lvBaseAccountDetails_MouseDoubleClick" ItemContainerStyle="{StaticResource myHeaderStyleColor}">
<ListView.View>
<GridView ColumnHeaderContainerStyle="{StaticResource myHeaderStyle}">
<GridView.Columns>
<GridViewColumn Header="" >
<GridViewColumn.CellTemplate>
<DataTemplate >
<Grid>
<Image Source="{Binding IconSelect}" Width="20" Height="20" />
</Grid>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Width="200" Header="" DisplayMemberBinding="{Binding SubBaseAcctType}" >
</GridViewColumn>
<GridViewColumn Width="200" Header="" DisplayMemberBinding="{Binding SubBaseAcctValue}">
</GridViewColumn>
<GridViewColumn Header="" >
<GridViewColumn.CellTemplate>
<DataTemplate >
<Grid>
<Image Source="{Binding IconBaseAcctFlag}" Width="20" Height="20" />
</Grid>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView.Columns>
</GridView>
</ListView.View>
</ListView>