前台代码 <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="ExpenseItDemo.CreateExpenseReportDialogBox" xmlns:localValidation="clr-namespace:ExpenseItDemo.Validation" DataContext="{StaticResource ExpenseData}" Icon="Watermark.png" Title="Create Expense Report" MinWidth="600" MinHeight="500" SizeToContent="WidthAndHeight" ShowInTaskbar="False" WindowStartupLocation="CenterOwner"> <Grid> <Image...