程序崩溃时动态生成单选按钮在WPF创建 [英] Program Crashes When Dynamically generated radiobuttons are created in WPF
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问题描述
我是一个C ++开发人员，我最近搬到C＃。我正在使用MVVM模式一个WPF应用程序。我在我的XAML文件groupboxbox我已经分成两列。一列包含了动态生成单选按钮和其他柱的侧向承载力包含一个标签和许多组合框。
I am a C++ developer and I recently moved to C#. I am working on a wpf app using MVVM pattern. I have a groupboxbox in my xaml file which I have divided into two columns. One column contains the dynamically generated set of radiobuttons and other colums contains a label and many comboboxes.
XAML：
<GroupBox Header="Daughter Cards" Height="Auto" HorizontalAlignment="Stretch" Margin="20,5,20,20" Name="groupBox2" VerticalAlignment="Stretch" Width="Auto">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition Width="220" />
</Grid.ColumnDefinitions>
<Grid Grid.Column="0">
<ItemsControl ItemsSource="{Binding SlotChildren}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<UniformGrid />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<RadioButton Content="{Binding SlotButtons}" Margin="0,10,0,0" IsChecked="{Binding IsChecked}" GroupName="SlotGroup" Height="15" Width="80" HorizontalAlignment="Center" VerticalAlignment="Center"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Grid>
<Grid Grid.Column="1">
<ComboBox ItemsSource="{Binding DaughterBoardBoxList}" SelectedItem="{Binding SelectedDaughterBoardBoxList, Mode=TwoWay}" SelectedIndex="0" Height="23" HorizontalAlignment="Center" Margin="0" Name="comboBox5" VerticalAlignment="Center" Width="158" />
<ComboBox ItemsSource="{Binding DaughterVersionBoxList}" SelectedItem="{Binding SelectedDaughterVersionBoxList, Mode=TwoWay}" SelectedIndex="0" Height="23" HorizontalAlignment="Center" Margin="0" Name="comboBox6" VerticalAlignment="Center" Width="158" />
<ComboBox ItemsSource="{Binding DaughterSerialBoxList}" SelectedItem="{Binding SelectedDaughterSerialBoxList, Mode=TwoWay}" SelectedIndex="0" Height="23" HorizontalAlignment="Center" Margin="0" Name="comboBox7" VerticalAlignment="Center" Width="158" />
<Label Content="{Binding DaughterStatus}" Height="25" HorizontalAlignment="Center" Margin="0" Name="DaughterCardLabel" VerticalAlignment="Center" Width="170" />
<ComboBox Height="23" ItemsSource="{Binding I2CAddressList}" SelectedItem="{Binding SelectedI2CAddressList, Mode=TwoWay}" SelectedIndex="0" Grid.Row="0" HorizontalAlignment="Center" Margin="0,0,0,0" Name="comboBox1" VerticalAlignment="Center" Width="200" />
<ComboBox Height="23" ItemsSource="{Binding BoardBoxList}" SelectedItem="{Binding SelectedBoardBoxList, Mode=TwoWay}" SelectedIndex="0" Grid.Row="1" HorizontalAlignment="Center" Margin="0,0,0,0" Name="comboBox2" VerticalAlignment="Center" Width="200" />
<ComboBox Height="23" ItemsSource="{Binding VersionBoxList}" SelectedItem="{Binding SelectedVersionBoxList, Mode=TwoWay}" SelectedIndex="0" Grid.Row="2" HorizontalAlignment="Center" Margin="0,0,0,0" Name="comboBox3" VerticalAlignment="Center" Width="200" />
<ComboBox Height="23" ItemsSource="{Binding SerialBoxList}" SelectedItem="{Binding SelectedSerialBoxList, Mode=TwoWay}" SelectedIndex="0" Grid.Row="3" HorizontalAlignment="Center" Margin="0,0,0,0" Name="comboBox4" VerticalAlignment="Center" Width="200" />
</Grid>
</Grid>
</GroupBox>
EEPROMViewModel类： XAML的DataContext设置此类。在同一个类：
EEPROMViewModel Class: DataContext of xaml is set to this class. In the same class:
Byte[] sendBuf = new Byte[256];
Byte[] readBuf = new Byte[256];
public ObservableCollection<EEPROMSlotViewModel> SlotChildren { get; set; }
public ObservableCollection<string> _I2CAddressList;
public ObservableCollection<string> _BoardBoxList;
public ObservableCollection<string> _VersionBoxList;
public ObservableCollection<string> _SerialBoxList;
public ObservableCollection<string> _DBoardBoxList;
public ObservableCollection<string> _DVersionBoxList;
public ObservableCollection<string> _DSerialBoxList;
public EEPROMViewModel()
{
SlotChildren = new ObservableCollection<EEPROMSlotViewModel>();
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "0 : None", ID = 0 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "1 : None", ID = 1 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "2 : None", ID = 2 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "3 : None", ID = 3 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "4 : None", ID = 4 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "5 : None", ID = 5 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "6 : None", ID = 6 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "7 : None", ID = 7 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "8 : None", ID = 8 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "9 : None", ID = 9 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "10 : None", ID = 10 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "11 : None", ID = 11 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "12 : None", ID = 12 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "13 : None", ID = 13 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "14 : None", ID = 14 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "15 : None", ID = 15 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "16 : None", ID = 16 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "17 : None", ID = 17 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "18 : None", ID = 18 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "19 : None", ID = 19 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "20 : None", ID = 20 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "21 : None", ID = 21 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "22 : None", ID = 22 });
SlotChildren.Add(new EEPROMSlotViewModel() { SlotButtons = "23 : None", ID = 23 });
var myboard = new[]
{
"",
"S1010012", // redhook
"S1010018", // bavaria
"S1010020" // flying dog
};
var myVariant = new[]
{
"",
"001A",
"001B",
"001C",
"002A",
"002B",
"002C",
"003A",
"003B",
"003C",
};
_I2CAddressList = new ObservableCollection<string>();
_BoardBoxList = new ObservableCollection<string>(myboard);
_VersionBoxList = new ObservableCollection<string>(myVariant);
_SerialBoxList = new ObservableCollection<string>();
for (int i = 1; i < 200; i++)
{
_SerialBoxList.Add(i.ToString());
}
//List of I2C Address
_I2CAddressList.Add("0x50");
_I2CAddressList.Add("0x53");
this.SelectedI2CAddressList = this._I2CAddressList[1];
this.SelectedBoardBoxList = this.BoardBoxList[2];
this.SelectedVersionBoxList = this.VersionBoxList[2];
this.SelectedSerialBoxList = this.SerialBoxList[0];
var myDBoards = new[]
{
"",
"S1010013",
"S1010014",
"S1010015",
"S1010017",
"S1010019",
"S1010021",
"S1010023",
"S1010026",
"S1110029",
};
_DBoardBoxList = new ObservableCollection<string>(myDBoards);
_DVersionBoxList = new ObservableCollection<string>(myVariant);
_DSerialBoxList = new ObservableCollection<string>();
for (int j = 1; j < 500; j++)
{
_DSerialBoxList.Add(j.ToString());
}
}
public ObservableCollection<string> I2CAddressList
{
get { return _I2CAddressList; }
set
{
_I2CAddressList = value;
OnPropertyChanged("I2CAddressList");
}
}
private string _SelectedI2CAddressList;
public string SelectedI2CAddressList
{
get { return _SelectedI2CAddressList; }
set
{
_SelectedI2CAddressList = value;
OnPropertyChanged("SelectedI2CAddressList");
}
}
public ObservableCollection<string> BoardBoxList
{
get { return _BoardBoxList; }
set
{
_BoardBoxList = value;
OnPropertyChanged("BoardBoxList");
}
}
private string _SelectedBoardBoxList;
public string SelectedBoardBoxList
{
get { return _SelectedBoardBoxList; }
set
{
_SelectedBoardBoxList = value;
OnPropertyChanged("SelectedBoardBoxList");
}
}
public ObservableCollection<string> VersionBoxList
{
get { return _VersionBoxList; }
set
{
_VersionBoxList = value;
OnPropertyChanged("VersionBoxList");
}
}
private string _SelectedVersionBoxList;
public string SelectedVersionBoxList
{
get { return _SelectedVersionBoxList; }
set
{
_SelectedVersionBoxList = value;
OnPropertyChanged("SelectedVersionBoxList");
}
}
public ObservableCollection<string> SerialBoxList
{
get { return _SerialBoxList; }
set
{
_SerialBoxList = value;
OnPropertyChanged("SerialBoxList");
}
}
private string _SelectedSerialBoxList;
public string SelectedSerialBoxList
{
get { return _SelectedSerialBoxList; }
set
{
_SelectedSerialBoxList = value;
OnPropertyChanged("SelectedSerialBoxList");
}
}
char[] version =
{
'A', 'U', 'D', 'I', 'E', 'N', 'C', 'E', // name
'0', '0', '0', '0', '0', '0', '0', '0' , // reserved, firmware size
'0', '0', '0', '0', '0', '0', '0', '0' , // board number
'0', '0', '0', '0', '0', '0', '0', '0' , // variant, version, serial
'0', '0', '0', '0', '0', '0', '0', '0' // date code, reserved
};
public ObservableCollection<string> DaughterBoardBoxList
{
get { return _DBoardBoxList; }
set
{
_DBoardBoxList = value;
OnPropertyChanged("DaughterBoardBoxList");
}
}
public string _SelectedDBoardBoxList;
public string SelectedDaughterBoardBoxList
{
get { return _SelectedDBoardBoxList; }
set
{
_SelectedDBoardBoxList = value;
OnPropertyChanged("SelectedDaughterBoardBoxList");
}
}
public ObservableCollection<string> DaughterVersionBoxList
{
get { return _DVersionBoxList; }
set
{
_DVersionBoxList = value;
OnPropertyChanged("DaughterVersionBoxList");
}
}
public string _SelectedDVersionBoxList;
public string SelectedDaughterVersionBoxList
{
get { return _SelectedDVersionBoxList; }
set
{
_SelectedDVersionBoxList = value;
OnPropertyChanged("SelectedDaughterVersionBoxList");
}
}
public ObservableCollection<string> DaughterSerialBoxList
{
get { return _DSerialBoxList; }
set
{
_DSerialBoxList = value;
OnPropertyChanged("DaughterSerialBoxList");
}
}
private string _SelectedDSerialBoxList;
public string SelectedDaughterSerialBoxList
{
get { return _SelectedDSerialBoxList; }
set
{
_SelectedDSerialBoxList = value;
OnPropertyChanged("SelectedDaughterSerialBoxList");
}
}
private string _DaughterStatus = "Not Retrieved yet";
public string DaughterStatus
{
get { return _DaughterStatus; }
set
{
_DaughterStatus = value;
OnPropertyChanged("DaughterStatus");
}
}
EEPROMSlotViewModel类：
EEPROMViewModel mVMModel = new EEPROMViewModel();
private string _SlotButtons;
public string SlotButtons
{
get; set;
}
private int _ID;
public int ID
{
get; set;
}
private bool _isChecked;
public bool IsChecked
{
get { return _isChecked; }
set
{
_isChecked = value;
OnSlotClick(ID);
OnPropertyChanged("IsChecked");
}
}
public void OnSlotClick(int Index)
{
string label = string.Empty;
if (Index >= 0 && Index < 24)
{
//getShortName(Index, label);
if (label == string.Empty)
{
SlotButtons = Convert.ToString(Index + " : None");
}
else
{
SlotButtons = Convert.ToString(Index + " :" + label);
}
}
if (label != string.Empty)
{
label += " - ";
//getLongName(Index, label);
}
else
{
label = "No device found at this slot";
}
mVMModel.DaughterStatus = label; // displays it in the label
}
当我试图运行应用程序，它崩溃并抛出一个异常的计算器。这个问题似乎是present在 EEPROMSlotViewModel 当我C检查任何单选按钮和关节的方法被调用。
When I am trying to run the application, it crashes and throws an exception as stackoverflow. The problem seems to be present in EEPROMSlotViewModel when I ccheck any radiobutton and the articular method gets called.
请告诉我的错误，我在这里做什么？ :( 请帮助：）
Whats the mistake I am doing here? :( Please help :)
推荐答案
您的问题是关于 mVMModel.DaughterStatus =标签; //在标签你可能实例里面EEPROMSlotViewModel EEPROMViewModel类这将导致无限循环显示。
为了解决这个问题，你需要访问您的parentVM它可以用做接口只显示DaughterStatus但快速的回答可能是如下：
Your problem is on mVMModel.DaughterStatus = label; // displays it in the label you are probably instantiating EEPROMViewModel class inside EEPROMSlotViewModel which causes infinite loop.
To solve this you need to access your parentVM it can be done using Interfaces to show only the DaughterStatus but quick answer could be as below :
添加属性，你EEPROMSlotViewModel：
Add a property to your EEPROMSlotViewModel :
public EEPROMViewModel ParentVM
{
get { return _parentVm; }
set
{
_parentVm = value;
OnPropertyChanged("ParentVM");
}
}
相反 mVMModel.DaughterStatus =标签的;把 ParentVM.DaughterStatus =标签;
最后：
Instead of mVMModel.DaughterStatus = label; put ParentVM.DaughterStatus = label;
And finally :
SlotChildren.Add(new EEPROMSlotViewModel() { ParentVM = this, SlotButtons = "0 : None", ID = 0 });
这篇关于程序崩溃时动态生成单选按钮在WPF创建的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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