0
我想在C#中使用Prism
,但我似乎已經設置它,以便它綁定到我的模型中的項目,而不是我的viewmodel。這是一個簡短的程序,更多的是一個學習工具,任何東西。當我將項目移動到ViewModel時,SetProperty似乎沒有通知更改的視圖。棱鏡6.2綁定到模型不ViewModel
有關我如何反向安裝的任何想法?
型號:
namespace XMLValueModifier_Threaded_WPF.Models
{
public class XMLReadFileModel : BindableBase
{
private string _XMLMasterFile2 = "0";
public string XMLGetFileName()
{
if (_XMLMasterFile2 != "1")
{
Microsoft.Win32.OpenFileDialog _XMLMasterFileDialog = new Microsoft.Win32.OpenFileDialog();
_XMLMasterFileDialog.DefaultExt = "xml";
_XMLMasterFileDialog.Filter = "xml Files (*.xml; *.XML) | *.xml; *.XML";
Nullable<bool> result = _XMLMasterFileDialog.ShowDialog();
if (result == true)
{
return _XMLMasterFileDialog.FileName;
}
return "";
}
else
{
return "";
}
}
}
}
視圖模型:
namespace XMLValueModifier_Threaded_WPF.ViewModels
{
public class MainDialogueViewModel : BindableBase
{
private string _XMLMasterFile;
public ICommand MasterFileLocation
{
get;
set;
}
public ICommand XMLFileLocation
{
get;
set;
}
public string XMLMasterFile
{
get
{
return _XMLMasterFile;
}
set
{
SetProperty(ref _XMLMasterFile, value);
}
}
private XMLReadFileModel xmlReadFileModel = new XMLReadFileModel();
public MainDialogueViewModel()
{
XMLReadFileModel xmlReadFileModel = new XMLReadFileModel();
Message = "example message";
XMLMasterFile = "example File";
this.MasterFileLocation = new DelegateCommand(chooseFile, canChooseFile);
this.XMLFileLocation = new DelegateCommand(chooseFile, canChooseFile);
}
public void masterfilelocation()
{
MessageBox.Show("i am here");
return;
}
private void chooseFile()
{
XMLMasterFile = xmlReadFileModel.XMLGetFileName();
}
private bool canChooseFile()
{
if (XMLMasterFile != null)
{
return true;
}
else
{
return true;
}
}
}
}
XAML:
<Window x:Class="XMLValueModifier_Threaded_WPF.Views.MainDialogue"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:XMLValueModifier_Threaded_WPF.ViewModels" Width="625" Height="452"
>
<Grid Margin="0,-24,0,-3">
<TextBox x:Name="Textbox1" Text="{Binding MainDialogueViewModel.XMLMasterFile,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" HorizontalAlignment="Left" Height="23" Margin="25,120,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="425"/>
<TextBox x:Name="Textbox2" Text="{Binding MainDialogueViewModel.XMLFiles,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" HorizontalAlignment="Left" Height="23" Margin="25,188,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="425" RenderTransformOrigin="0.506,1.565"/>
<Label Content="Location of Master XML File" HorizontalAlignment="Left" Margin="25,89,0,0" VerticalAlignment="Top"/>
<Label Content="Location of XML File(s)" HorizontalAlignment="Left" Margin="25,157,0,0" VerticalAlignment="Top"/></GRID>
當我通過調試器時,我可以看到XMLMasterFile值更改,但未更新視圖。我會在哪裏看到DataContext是否正確設置?如果沒有使用DataContext,我認爲xmlns:local會將綁定指向正確的位置 – coolercargo
不,本地名稱空間對DataContext不起作用。您必須先將視圖的DataContext設置爲ViewModel的實例,然後才能使用任何綁定。 –
感謝Brian,我拿出了MainDialogueViewModel,它現在正在工作。 – coolercargo