最初我想在两个 VM 之间传递一个“ObservableCollection
主视图型号 private void openNewSpecialCustomer()
{
GalaSoft.MvvmLight.Messaging.Messenger.Default.Send("Musaab");
Console.WriteLine("send done");
AddNewSpecialCustomer a = new AddNewSpecialCustomer();
_dialogService.showDialoge(a);
}
AddNewSpecialCustomerViewModel public AddNewSpecialCustomerViewModel()
{
GalaSoft.MvvmLight.Messaging.Messenger.Default.Register<string>(this, doSomething);
Console.WriteLine("Should now Receive");
validProperties = new Dictionary<string, bool>();
validProperties.Add("specialCustomerName",false);
validProperties.Add("tel", false);
allPropertiesValid = false;
}
public void doSomething(string s)
{
Console.WriteLine("Should be received");
specialCustomerName = s;
Console.WriteLine("s value " + s);
}
public String specialCustomerName
{
get { return _specialCustomerName; }
set
{
if (_specialCustomerName != value)
{
_specialCustomerName = value;
OnPropertyChanged("specialCustomerName");
}
}
}
现在 XAML 用于 AddNewSpecialCustomer <Window FlowDirection="RightToLeft" x:Class="GlassStore.AddNewSpecialCustomer"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:local="clr-namespace:GlassStore.ViewModels"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="AddNewSpecialCustomer" Height="318" Width="458">
<Window.DataContext>
<local:AddNewSpecialCustomerViewModel/>
</Window.DataContext>
<Grid Background="{DynamicResource NormalBrush}">
<Button Command="{Binding Save}" Content="موافق" Height="29" HorizontalAlignment="Left" Margin="31,218,0,0" Name="button1" VerticalAlignment="Top" Width="75" />
<Label Content="إسم العميل" Height="27" HorizontalAlignment="Left" Margin="12,12,0,0" Name="label1" VerticalAlignment="Top" Width="120" />
<TextBox Text="{Binding specialCustomerName,Mode=TwoWay,ValidatesOnDataErrors=True,ValidatesOnExceptions=True,UpdateSourceTrigger=PropertyChanged}" Height="27" HorizontalAlignment="Left" Margin="155,12,0,0" Name="textBox1" VerticalAlignment="Top" Width="210" />
<Label Content="المنطقة/المكان" Height="27" HorizontalAlignment="Left" Margin="12,67,0,0" Name="label2" VerticalAlignment="Top" Width="120" />
<TextBox Text="{Binding region}" Height="27" HorizontalAlignment="Left" Margin="155,67,0,0" Name="textBox2" VerticalAlignment="Top" Width="210" />
<TextBox Text="{Binding tel,ValidatesOnDataErrors=True,ValidatesOnExceptions=True,UpdateSourceTrigger=PropertyChanged}" Height="27" HorizontalAlignment="Left" Margin="155,119,0,0" Name="textBox3" VerticalAlignment="Top" Width="210" />
<Label Content="رقم الهاتف " Height="27" HorizontalAlignment="Left" Margin="12,119,0,0" Name="label3" VerticalAlignment="Top" Width="120" />
<Button Content="إلغاء" Height="29" HorizontalAlignment="Left" Margin="143,218,0,0" Name="button2" VerticalAlignment="Top" Width="75" />
<Label Content="" Height="29" HorizontalAlignment="Left" Margin="12,177,0,0" Name="label4" VerticalAlignment="Top" Width="412" />
</Grid>
您可以看到有一个 textBox,其 Text 属性绑定(bind)到 specialCustomerName 属性,我正在尝试通过 messenger 更改它,数据绑定(bind)模式是 TwoWay,所以我希望我的 textBox 在加载时有我的名字,(我通过信使发送我的名字)事实并非如此,我希望这可能是更清晰的代码
提前致谢
最佳答案
您的第二个窗口构造函数是在第一个窗口构造函数之后调用的吗?
您应该先注册,然后才能发送消息。没有收到以前发送的消息。很抱歉成为 C.O.但这种错误很有可能:)
关于wpf - 使用 MVVM-Light 的消息传递问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6479860/