我刚开始学习MVVM方法论。我写了一个简单的应用程序，基本上是一个申请表。我的UserControl窗口是一堆标签和文本框。我将文本框绑定到Application类中的元素。用户可以选择从Google电子表格加载数据或硬编码数据。一切都很好。我还希望能够使用文本框中的值打印表单。窗口布局打印得很好，但文本框中的值。我只是在做一个printobjext.printvisual命令。我的问题是如何打印文本框的内容，是否需要以其他方式绑定数据？
这是我的UserControl XAML窗口的一部分。只是消除了冗余代码。
<UserControl x:Class="ApplicationForm.Views.ApplicationView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:ApplicationForm"
xmlns:model="clr-namespace:ApplicationForm.Model"
xmlns:views="clr-namespace:ApplicationForm.Views"
xmlns:viewModel="clr-namespace:ApplicationForm.ViewModel"
mc:Ignorable="d"
Height="980" Width="800" Background="#FFDAFDF2">
<!--<UserControl.Resources>
<ResourceDictionary>
<viewModel:ApplicationViewModel x:Key="AppViewModel"/>
</ResourceDictionary>
</UserControl.Resources>-->
<Grid x:Name="grdAppForm">
<Grid x:Name="grdAppFormGrid" DocumentViewerBase.IsMasterPage="True" VirtualizingPanel.VirtualizationMode="Standard"
VirtualizingPanel.IsVirtualizingWhenGrouping="True" HorizontalAlignment="Center" VerticalAlignment="Center" Height="820" Width="700">
<Label x:Name="lblName" Content="Name:" Height="28" Width="58" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="20,10,0,0" FontFamily="Arial" FontWeight="Bold" FontSize="16" />
<TextBox x:Name="tbxName" DataContext="{Binding Applicants, Mode=TwoWay}" Text="{Binding FullName, Mode=OneWay, UpdateSourceTrigger=PropertyChanged, BindsDirectlyToSource=True}"
Height="22" Width="215" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="83,10,0,0" FontFamily="Arial" FontWeight="Bold" BorderThickness="0,0,0,3" BorderBrush="Black" FontSize="16" VerticalContentAlignment="Bottom"/>
<Label x:Name="lblFamilySize" Content="Family Size:" Height="28" Width="102" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="362,10,0,0" FontFamily="Arial" FontWeight="Bold" FontSize="16" />
<Label x:Name="lblFamO" Content="O:" Height="28" Width="27" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="461,10,0,0" FontFamily="Arial" FontWeight="Bold" FontSize="16"/>
<TextBox x:Name="txbFamO" DataContext="{Binding Applicants, Mode=TwoWay}" Text="{Binding Path=FamilyO, Mode=TwoWay, BindsDirectlyToSource=True}" Height="22" Width="20" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="486,10,0,0" FontFamily="Arial" FontSize="16" FontWeight="Bold" BorderThickness="0,0,0,3" BorderBrush="Black" VerticalContentAlignment="Bottom"/>
<Label x:Name="lblFamA" Content="A:" Height="28" Width="25" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="506,10,0,0" FontFamily="Arial" FontWeight="Bold" FontSize="16"/>
<TextBox x:Name="tbxFamA" DataContext="{Binding Applicants}" Text="{Binding Path=FamilyA, Mode=TwoWay}" Height="22" Width="20" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="531,10,0,0" FontFamily="Arial" FontSize="16" FontWeight="Bold" BorderThickness="0,0,0,3" BorderBrush="Black" VerticalContentAlignment="Bottom"/>
<Label x:Name="lblFamC" Content="C:" Height="28" Width="25" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="552,10,0,0" FontFamily="Arial" FontWeight="Bold" FontSize="16"/>
<TextBox x:Name="txtFamC" DataContext="{Binding Applicants}" Text="{Binding Path=FamilyC, Mode=TwoWay}" Height="22" Width="20" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="577,10,0,0" FontFamily="Arial" FontSize="16" FontWeight="Bold" BorderThickness="0,0,0,3" BorderBrush="Black" VerticalContentAlignment="Bottom"/>
<Label x:Name="lblEqual" Content="=" Height="28" Width="20" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="601,10,0,0" FontFamily="Arial" FontWeight="Bold" FontSize="16"/>
<TextBox x:Name="tbxFamTot" DataContext="{Binding Applicants}" Text="{Binding Path=FamilyTotal,
Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" IsReadOnly="True" Height="22" Width="30"
HorizontalAlignment="Left" VerticalAlignment="Top" Margin="624,10,0,0" FontFamily="Arial"
FontWeight="Bold" FontSize="16" BorderBrush="Black" BorderThickness="0,0,0,3" IsTabStop="False" VerticalContentAlignment="Bottom"/>
<Label x:Name="lblRenewalDate" Content="Renewal Date:" Height="28" Width="119" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="127,60,0,0" FontFamily="Arial" FontSize="16" FontWeight="Bold"/>
<TextBox x:Name="tbxRenewalDate" DataContext="{Binding Applicants}" Text="{Binding Path=RenewalDate, Mode=TwoWay}" Height="22" Width="180" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="247,60,0,0" FontFamily="Arial" FontSize="16" FontWeight="Bold" BorderThickness="0,0,0,3" BorderBrush="Black" VerticalContentAlignment="Bottom"/>
<Label x:Name="lblAddressDisp" Content="Address:" Height="28" Width="80" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="80,115,0,0" FontFamily="Arial" FontSize="16" FontWeight="Bold"/>
<TextBox x:Name="tbxAddress1" DataContext="{Binding Applicants, Mode=TwoWay}" Text="{Binding Path=Address1, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, BindsDirectlyToSource=True}" Height="22" Width="344" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="162,115,0,0" FontFamily="Arial" FontSize="16" FontWeight="Bold" TextWrapping="Wrap" BorderThickness="0,0,0,3" BorderBrush="Black" VerticalContentAlignment="Bottom"/>
<TextBox x:Name="tbxAddress2" DataContext="{Binding Applicants}" Text="{Binding Path=Address2, Mode=TwoWay}" Height="22" Width="426" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="80,145,0,0" FontFamily="Arial" FontSize="16" FontWeight="Bold" TextWrapping="Wrap" BorderThickness="0,0,0,3" BorderBrush="Black" VerticalContentAlignment="Bottom"/>
</grid>
<Grid x:Name="grdButtonsGrid" HorizontalAlignment="Center" Height="80" Width="700" Margin="20, 880,0,0">
<Button x:Name="btnLoadApplicant" Command="{Binding LoadApplicantCommand}"
HorizontalAlignment="Left" Height="43" Margin="60,25,0,0" VerticalAlignment="Top"
Width="78" FontFamily="Arial" FontSize="14.667" Background="#FFDAFDF2" BorderThickness="2">
<TextBlock Text="Load Applicant" TextWrapping="Wrap" />
</Button>
<Button x:Name="btnGetApplicant" Command="{Binding GetApplicantCommand}"
HorizontalAlignment="Left" Height="43" Margin="150,25,0,0" VerticalAlignment="Top"
Width="95" FontFamily="Arial" FontSize="14.667" Background="#FFDAFDF2" BorderThickness="2">
<TextBlock Text="Get Applicant By Name" HorizontalAlignment="Center" VerticalAlignment="Center" TextWrapping="WrapWithOverflow" />
</Button>
<Button x:Name="btnPrintApplicant" Command="{Binding PrintApplicantCommand}"
HorizontalAlignment="Left" Height="43" Margin="255,25,0,0" VerticalAlignment="Top"
Width="70" FontFamily="Arial" FontSize="14.667" Background="#FFDAFDF2" BorderThickness="2">
<TextBlock Text="Print Applicant" TextWrapping="Wrap"/>
</Button>
<Button x:Name="btnClearData" Command="{Binding ClearDataCommand}"
HorizontalAlignment="Left" Height="43" Margin="335,25,0,0" VerticalAlignment="Top"
Width="58" FontFamily="Arial" FontSize="14.667" Background="#FFDAFDF2" BorderThickness="2">
<TextBlock Text="Clear Data" TextWrapping="Wrap"/>
</Button>
<Button x:Name="btnClose" Content="Close" Command="{Binding CloseCommand}"
HorizontalAlignment="Left" Height="43" Margin="440,25,0,0" VerticalAlignment="Top"
Width="58" FontFamily="Arial" FontSize="14.667" Background="#FFDAFDF2" BorderThickness="2">
</Button>
</Grid>
</grid>
这是我的ApplicationModel中的Application类的一部分。
namespace ApplicationForm.Model
{ 公共类ApplicationModel { }
public class Applicant : INotifyPropertyChanged
{
private string firstName;
private string lastName;
private string familyO;
private string familyA;
private string familyC;
private string renewalDate;
private string address1;
private string address2;
private string city;
private string state;
private string zip;
private string phoneNumber;
private string name1Birthday;
private string name2;
private string name2Birthday;
private string name3;
private string name3Birthday;
private string name4;
private string name4Birthday;
private string name5;
private string name5Birthday;
private string name6;
private string name6Birthday;
private string name7;
private string name7Birthday;
private string name8;
private string name8Birthday;
public string FirstName
{
get
{
return firstName;
}
set
{
if (firstName != value)
{
firstName = value;
RaisePropertyChanged("FirstName");
RaisePropertyChanged("FullName");
}
}
}
public string LastName
{
get { return lastName; }
set
{
if (lastName != value)
{
lastName = value;
RaisePropertyChanged("LastName");
RaisePropertyChanged("FullName");
}
}
}
public string FullName
{
get
{
return firstName + " " + lastName;
}
}
public string FamilyO
{
get { return familyO; }
set
{
if (familyO != value)
{
familyO = value;
RaisePropertyChanged("FamilyO");
}
}
}
public string FamilyA
{
get { return familyA; }
set
{
if (familyA != value)
{
familyA = value;
RaisePropertyChanged("FamilyA");
}
}
}
}
}
这是我在ApplicationViewModel中的打印例程。
public void PrintApplicant(object selectedItem)
{
ApplicationView view = new ApplicationView();
PrintDialog prnt = new PrintDialog();
ObservableCollection<Applicant> applicants = new ObservableCollection<Applicant>();
applicants = Applicants;
if (prnt.ShowDialog() == true)
{
Size pageSize = new Size(prnt.PrintableAreaWidth - 30, prnt.PrintableAreaHeight - 30);
view.grdAppFormGrid.Measure(pageSize);
view.grdAppFormGrid.Arrange(new Rect(5, 5, pageSize.Width, pageSize.Height));
prnt.PrintVisual(view.grdAppFormGrid, applicants[0].FullName);
}
}