Mixing
Create property dynamically in viewmodel MVVM light and UWP
1
I would like to create viewmodel properties in runtime.
I'm not so familiar with MVVM in UWP. Rather windows forms. In the past I created custom class object with reflection and I had possibility to add properties in runtime.
In current project I prepared solution with mvvm ligt and UWP app. Works fine with data exchange on viewmodel level. Now I try to find how to create properties of viewmodel in runtime ie. from descriptions in xml file.
namespace hmi_panel.ViewModels
{
public class HomeViewModel : ViewModelBase
{
#region Fields
readonly IPlcService _plcService;
#endregion
#region Constructors
public HomeViewModel(IPlcService dummyPlcService)
{
_plcService = dummyPlcService;
_plcService.Connect("127.0.0.1", 0, 1);
//zdarzenie cyklicznego odswiezania zeminnych
OnPlcServiceValuesRefreshed(null, null);
_plcService.ValuesRefreshed += OnPlcServiceValuesRefreshed;
}
#endregion
#region Properties
public string AppVersion
{
get { return $"{Package.Current.Id.Version.Major}.
{Package.Current.Id.Version.Minor}.{Package.Current.Id.Version.Build}.
{Package.Current.Id.Version.Revision}"; }
}
public string AppCopyright
{
get { return "plc service: " + _plcService.ConnectionState.ToString(); }
}
private bool _pumpState;
public bool pumpState
{
get { return _pumpState; }
set {
_pumpState=value;
RaisePropertyChanged(() => pumpState);
}
}
#endregion
#region Methods
private RelayCommand _ConnectCommand;
public RelayCommand ConnectCommand
{
get
{
return _ConnectCommand ?? (_ConnectCommand = new RelayCommand(() =>
{
pumpState = true;
}, () => true));
}
}
private void OnPlcServiceValuesRefreshed(object sender, EventArgs e)
{
pumpState = _plcService.PumpState;
}
#endregion
}
}
Property pumpState value is readed and writed with _plService. I can change value and I can read after external change.
I would like to start only with bidirectional binding in xaml and create needed property ie. pumpState when viewmodel instance is created ie. in construtor.
c# mvvm uwp binding dynamicobject
edited Jan 3 at 2:22
Xavier Xie - MSFT
5,8041317
asked Jan 2 at 10:52
Jakub OkajJakub Okaj
61
|
show 1 more comment
1
I would like to create viewmodel properties in runtime.
I'm not so familiar with MVVM in UWP. Rather windows forms. In the past I created custom class object with reflection and I had possibility to add properties in runtime.
In current project I prepared solution with mvvm ligt and UWP app. Works fine with data exchange on viewmodel level. Now I try to find how to create properties of viewmodel in runtime ie. from descriptions in xml file.
namespace hmi_panel.ViewModels
{
public class HomeViewModel : ViewModelBase
{
#region Fields
readonly IPlcService _plcService;
#endregion
#region Constructors
public HomeViewModel(IPlcService dummyPlcService)
{
_plcService = dummyPlcService;
_plcService.Connect("127.0.0.1", 0, 1);
//zdarzenie cyklicznego odswiezania zeminnych
OnPlcServiceValuesRefreshed(null, null);
_plcService.ValuesRefreshed += OnPlcServiceValuesRefreshed;
}
#endregion
#region Properties
public string AppVersion
{
get { return $"{Package.Current.Id.Version.Major}.
{Package.Current.Id.Version.Minor}.{Package.Current.Id.Version.Build}.
{Package.Current.Id.Version.Revision}"; }
}
public string AppCopyright
{
get { return "plc service: " + _plcService.ConnectionState.ToString(); }
}
private bool _pumpState;
public bool pumpState
{
get { return _pumpState; }
set {
_pumpState=value;
RaisePropertyChanged(() => pumpState);
}
}
#endregion
#region Methods
private RelayCommand _ConnectCommand;
public RelayCommand ConnectCommand
{
get
{
return _ConnectCommand ?? (_ConnectCommand = new RelayCommand(() =>
{
pumpState = true;
}, () => true));
}
}
private void OnPlcServiceValuesRefreshed(object sender, EventArgs e)
{
pumpState = _plcService.PumpState;
}
#endregion
}
}
Property pumpState value is readed and writed with _plService. I can change value and I can read after external change.
I would like to start only with bidirectional binding in xaml and create needed property ie. pumpState when viewmodel instance is created ie. in construtor.
c# mvvm uwp binding dynamicobject
edited Jan 3 at 2:22
Xavier Xie - MSFT
5,8041317
asked Jan 2 at 10:52
Jakub OkajJakub Okaj
61
I've helped you format your code. Please read How do I format my posts using Markdown or HTML? to format your post next time.
– Xavier Xie - MSFT
Jan 3 at 2:32
I actually did not quite understand what you want to do. Did you want to use TwoWay bindings to change your property's value on XAML?
– Xavier Xie - MSFT
Jan 3 at 2:33
Yes I did. Property value in viewmodel is changed in proper way. I just want to create properties in viewmodel not in code but in runtime ie. from some description list.
– Jakub Okaj
Jan 3 at 20:31
You could bind it on XAML and setMode=TwoWay. For example, you could bind theCheckBox's IsChecked topumpStateproperty.<CheckBox IsChecked="{Binding pumpState,Mode=TwoWay}" Content="descript"></CheckBox>Then, when the CheckBox checked or unchecked, thepumpStateproperty's value will be changed.
– Xavier Xie - MSFT
Jan 4 at 1:51
That's done. It works. My goal is to do not define property pumpState in static code but build viewmodel object properties in runtime.
– Jakub Okaj
Jan 4 at 9:25
|
show 1 more comment
1
1
1
I would like to create viewmodel properties in runtime.
I'm not so familiar with MVVM in UWP. Rather windows forms. In the past I created custom class object with reflection and I had possibility to add properties in runtime.
In current project I prepared solution with mvvm ligt and UWP app. Works fine with data exchange on viewmodel level. Now I try to find how to create properties of viewmodel in runtime ie. from descriptions in xml file.
namespace hmi_panel.ViewModels
{
public class HomeViewModel : ViewModelBase
{
#region Fields
readonly IPlcService _plcService;
#endregion
#region Constructors
public HomeViewModel(IPlcService dummyPlcService)
{
_plcService = dummyPlcService;
_plcService.Connect("127.0.0.1", 0, 1);
//zdarzenie cyklicznego odswiezania zeminnych
OnPlcServiceValuesRefreshed(null, null);
_plcService.ValuesRefreshed += OnPlcServiceValuesRefreshed;
}
#endregion
#region Properties
public string AppVersion
{
get { return $"{Package.Current.Id.Version.Major}.
{Package.Current.Id.Version.Minor}.{Package.Current.Id.Version.Build}.
{Package.Current.Id.Version.Revision}"; }
}
public string AppCopyright
{
get { return "plc service: " + _plcService.ConnectionState.ToString(); }
}
private bool _pumpState;
public bool pumpState
{
get { return _pumpState; }
set {
_pumpState=value;
RaisePropertyChanged(() => pumpState);
}
}
#endregion
#region Methods
private RelayCommand _ConnectCommand;
public RelayCommand ConnectCommand
{
get
{
return _ConnectCommand ?? (_ConnectCommand = new RelayCommand(() =>
{
pumpState = true;
}, () => true));
}
}
private void OnPlcServiceValuesRefreshed(object sender, EventArgs e)
{
pumpState = _plcService.PumpState;
}
#endregion
}
}
Property pumpState value is readed and writed with _plService. I can change value and I can read after external change.
I would like to start only with bidirectional binding in xaml and create needed property ie. pumpState when viewmodel instance is created ie. in construtor.
c# mvvm uwp binding dynamicobject
edited Jan 3 at 2:22
Xavier Xie - MSFT
5,8041317
asked Jan 2 at 10:52
Jakub OkajJakub Okaj
61
I would like to create viewmodel properties in runtime.
I'm not so familiar with MVVM in UWP. Rather windows forms. In the past I created custom class object with reflection and I had possibility to add properties in runtime.
In current project I prepared solution with mvvm ligt and UWP app. Works fine with data exchange on viewmodel level. Now I try to find how to create properties of viewmodel in runtime ie. from descriptions in xml file.
namespace hmi_panel.ViewModels
{
public class HomeViewModel : ViewModelBase
{
#region Fields
readonly IPlcService _plcService;
#endregion
#region Constructors
public HomeViewModel(IPlcService dummyPlcService)
{
_plcService = dummyPlcService;
_plcService.Connect("127.0.0.1", 0, 1);
//zdarzenie cyklicznego odswiezania zeminnych
OnPlcServiceValuesRefreshed(null, null);
_plcService.ValuesRefreshed += OnPlcServiceValuesRefreshed;
}
#endregion
#region Properties
public string AppVersion
{
get { return $"{Package.Current.Id.Version.Major}.
{Package.Current.Id.Version.Minor}.{Package.Current.Id.Version.Build}.
{Package.Current.Id.Version.Revision}"; }
}
public string AppCopyright
{
get { return "plc service: " + _plcService.ConnectionState.ToString(); }
}
private bool _pumpState;
public bool pumpState
{
get { return _pumpState; }
set {
_pumpState=value;
RaisePropertyChanged(() => pumpState);
}
}
#endregion
#region Methods
private RelayCommand _ConnectCommand;
public RelayCommand ConnectCommand
{
get
{
return _ConnectCommand ?? (_ConnectCommand = new RelayCommand(() =>
{
pumpState = true;
}, () => true));
}
}
private void OnPlcServiceValuesRefreshed(object sender, EventArgs e)
{
pumpState = _plcService.PumpState;
}
#endregion
}
}
Property pumpState value is readed and writed with _plService. I can change value and I can read after external change.
I would like to start only with bidirectional binding in xaml and create needed property ie. pumpState when viewmodel instance is created ie. in construtor.
c# mvvm uwp binding dynamicobject
c# mvvm uwp binding dynamicobject
edited Jan 3 at 2:22
Xavier Xie - MSFT
5,8041317
asked Jan 2 at 10:52
Jakub OkajJakub Okaj
61
edited Jan 3 at 2:22
Xavier Xie - MSFT
5,8041317
asked Jan 2 at 10:52
Jakub OkajJakub Okaj
61
edited Jan 3 at 2:22
Xavier Xie - MSFT
5,8041317
edited Jan 3 at 2:22
Xavier Xie - MSFT
5,8041317
edited Jan 3 at 2:22
Xavier Xie - MSFT
5,8041317
5,8041317
asked Jan 2 at 10:52
Jakub OkajJakub Okaj
61
asked Jan 2 at 10:52
Jakub OkajJakub Okaj
61
asked Jan 2 at 10:52
Jakub OkajJakub Okaj
61
61
I've helped you format your code. Please read How do I format my posts using Markdown or HTML? to format your post next time.
– Xavier Xie - MSFT
Jan 3 at 2:32
I actually did not quite understand what you want to do. Did you want to use TwoWay bindings to change your property's value on XAML?
– Xavier Xie - MSFT
Jan 3 at 2:33
Yes I did. Property value in viewmodel is changed in proper way. I just want to create properties in viewmodel not in code but in runtime ie. from some description list.
– Jakub Okaj
Jan 3 at 20:31
You could bind it on XAML and setMode=TwoWay. For example, you could bind theCheckBox's IsChecked topumpStateproperty.<CheckBox IsChecked="{Binding pumpState,Mode=TwoWay}" Content="descript"></CheckBox>Then, when the CheckBox checked or unchecked, thepumpStateproperty's value will be changed.
– Xavier Xie - MSFT
Jan 4 at 1:51
That's done. It works. My goal is to do not define property pumpState in static code but build viewmodel object properties in runtime.
– Jakub Okaj
Jan 4 at 9:25
|
show 1 more comment
I've helped you format your code. Please read How do I format my posts using Markdown or HTML? to format your post next time.
– Xavier Xie - MSFT
Jan 3 at 2:32
I actually did not quite understand what you want to do. Did you want to use TwoWay bindings to change your property's value on XAML?
– Xavier Xie - MSFT
Jan 3 at 2:33
Yes I did. Property value in viewmodel is changed in proper way. I just want to create properties in viewmodel not in code but in runtime ie. from some description list.
– Jakub Okaj
Jan 3 at 20:31
You could bind it on XAML and setMode=TwoWay. For example, you could bind theCheckBox's IsChecked topumpStateproperty.<CheckBox IsChecked="{Binding pumpState,Mode=TwoWay}" Content="descript"></CheckBox>Then, when the CheckBox checked or unchecked, thepumpStateproperty's value will be changed.
– Xavier Xie - MSFT
Jan 4 at 1:51
That's done. It works. My goal is to do not define property pumpState in static code but build viewmodel object properties in runtime.
– Jakub Okaj
Jan 4 at 9:25
I've helped you format your code. Please read How do I format my posts using Markdown or HTML? to format your post next time.
– Xavier Xie - MSFT
Jan 3 at 2:32
I've helped you format your code. Please read How do I format my posts using Markdown or HTML? to format your post next time.
– Xavier Xie - MSFT
Jan 3 at 2:32
I actually did not quite understand what you want to do. Did you want to use TwoWay bindings to change your property's value on XAML?
– Xavier Xie - MSFT
Jan 3 at 2:33
I actually did not quite understand what you want to do. Did you want to use TwoWay bindings to change your property's value on XAML?
– Xavier Xie - MSFT
Jan 3 at 2:33
Yes I did. Property value in viewmodel is changed in proper way. I just want to create properties in viewmodel not in code but in runtime ie. from some description list.
– Jakub Okaj
Jan 3 at 20:31
Yes I did. Property value in viewmodel is changed in proper way. I just want to create properties in viewmodel not in code but in runtime ie. from some description list.
– Jakub Okaj
Jan 3 at 20:31
You could bind it on XAML and set
Mode=TwoWay. For example, you could bind the CheckBox's IsChecked to pumpState property. <CheckBox IsChecked="{Binding pumpState,Mode=TwoWay}" Content="descript"></CheckBox> Then, when the CheckBox checked or unchecked, the pumpState property's value will be changed.– Xavier Xie - MSFT
Jan 4 at 1:51
You could bind it on XAML and set
Mode=TwoWay. For example, you could bind the CheckBox's IsChecked to pumpState property. <CheckBox IsChecked="{Binding pumpState,Mode=TwoWay}" Content="descript"></CheckBox> Then, when the CheckBox checked or unchecked, the pumpState property's value will be changed.– Xavier Xie - MSFT
Jan 4 at 1:51
That's done. It works. My goal is to do not define property pumpState in static code but build viewmodel object properties in runtime.
– Jakub Okaj
Jan 4 at 9:25
That's done. It works. My goal is to do not define property pumpState in static code but build viewmodel object properties in runtime.
– Jakub Okaj
Jan 4 at 9:25
|
show 1 more comment
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I've helped you format your code. Please read How do I format my posts using Markdown or HTML? to format your post next time.
– Xavier Xie - MSFT
Jan 3 at 2:32
I actually did not quite understand what you want to do. Did you want to use TwoWay bindings to change your property's value on XAML?
– Xavier Xie - MSFT
Jan 3 at 2:33
Yes I did. Property value in viewmodel is changed in proper way. I just want to create properties in viewmodel not in code but in runtime ie. from some description list.
– Jakub Okaj
Jan 3 at 20:31
You could bind it on XAML and set
Mode=TwoWay. For example, you could bind theCheckBox's IsChecked topumpStateproperty.<CheckBox IsChecked="{Binding pumpState,Mode=TwoWay}" Content="descript"></CheckBox>Then, when the CheckBox checked or unchecked, thepumpStateproperty's value will be changed.– Xavier Xie - MSFT
Jan 4 at 1:51
That's done. It works. My goal is to do not define property pumpState in static code but build viewmodel object properties in runtime.
– Jakub Okaj
Jan 4 at 9:25