我不确定今天早上发生了什么,我运行了我的项目并且它开始导致System.ArgumentException错误。也许我昨晚改变了一些东西,我又睡了一半。
我试着寻找答案,这让我知道在财产中有相同的名字?
我扫描了我的代码,它看起来就像它成功运行的最后一样......很奇怪..
也许你可以帮助我找出错误并用它来启发我。
基本上错误是在此代码中引起的
lvSubmeters.ItemsSource = this.store
在此代码中
public MainPage()
{
this.InitializeComponent();
this.InitializeControlEvents();
this.InitializeControls();
}
void InitializeControls()
{
store = new DataStore();
store.AllItems = new System.Collections.ObjectModel.ObservableCollection<ItemFields>();
PopulateTempData();
lvSubmeters.ItemsSource = this.store;
}
这是我的PopulateTempData
void PopulateTempData()
{
txCurrentBill.Text = "5308.07";
txKwHUsed.Text = "710";
txTotalAdditonalCharges.Text = "249.1";
ComputeKwhPerSubmeter(txTotalAdditonalCharges, null);
RefreshListView(new ItemFields()
{
MeterID = "1234",
Fullname = "XOP",
LastReading = 22980,
NewReading = 23107,
KwhPerSubmeter = Convert.ToDouble(txKwHPerSub.Tag),
AdditionalCharges = Convert.ToDouble(txChargeForEachSubmeters.Tag)
});
RefreshListView(new ItemFields()
{
MeterID = "2345",
Fullname = "Bigasan",
LastReading = 0,
NewReading = 0,
KwhPerSubmeter = Convert.ToDouble(txKwHPerSub.Tag),
AdditionalCharges = Convert.ToDouble(txChargeForEachSubmeters.Tag)
});
RefreshListView(new ItemFields()
{
MeterID = "3456",
Fullname = "Store",
LastReading = 0,
NewReading = 0,
KwhPerSubmeter = Convert.ToDouble(txKwHPerSub.Tag),
AdditionalCharges = Convert.ToDouble(txChargeForEachSubmeters.Tag)
});
RefreshListView(new ItemFields()
{
MeterID = "4567",
Fullname = "Social & Play",
LastReading = 7056,
NewReading = 7511,
KwhPerSubmeter = Convert.ToDouble(txKwHPerSub.Tag),
AdditionalCharges = Convert.ToDouble(txChargeForEachSubmeters.Tag)
});
RefreshListView(new ItemFields()
{
MeterID = "5678",
Fullname = "Parlor",
LastReading = 8277,
NewReading = 8365,
KwhPerSubmeter = Convert.ToDouble(txKwHPerSub.Tag),
AdditionalCharges = Convert.ToDouble(txChargeForEachSubmeters.Tag)
});
}
这是ItemFields Model
using System;
namespace ElectricSubmeterBillComputation.Models
{
using System.ComponentModel;
public class ItemFields : System.ComponentModel.INotifyPropertyChanged
{
string _meter_id = string.Empty;
public string MeterID
{
get { return this._meter_id; }
set
{
if (_meter_id != value)
{
_meter_id = value;
NotifyPropertyChanged("MeterID");
}
}
}
string _fullname = string.Empty;
public string Fullname
{
get { return this._fullname; }
set
{
if (this._fullname != value)
{
this._fullname = value;
NotifyPropertyChanged("Fullname");
}
}
}
int _lastreading = 0;
public int LastReading
{
get { return this._lastreading; }
set
{
if (this._lastreading != value)
{
this._lastreading = value;
NotifyPropertyChanged("LastReading");
}
}
}
int _newreading = 0;
public int NewReading
{
get { return this._newreading; }
set
{
if (this._newreading != value)
{
this._newreading = value;
NotifyPropertyChanged("NewReading");
}
}
}
int _kwhused = 0;
public int KwHUsed
{
get { return this._kwhused; }
set
{
if (this._kwhused != value)
{
this._kwhused = value;
NotifyPropertyChanged("KwHUsed");
}
}
}
double _KwHPerSubmeter = 0.0;
public double KwhPerSubmeter
{
get { return this._KwHPerSubmeter; }
set
{
if (this._KwHPerSubmeter != value)
{
this._KwHPerSubmeter = value;
NotifyPropertyChanged("KwhPerSubmeter");
}
}
}
double _kwhamount = 0.0;
public double KwhUsedAmount
{
get { return this._kwhamount; }
set
{
if (this._kwhamount != value)
{
this._kwhamount = value;
NotifyPropertyChanged("KwhUsedAmount");
}
}
}
double _add_charge = 0.0;
public double AdditionalCharges
{
get { return this._add_charge; }
set
{
if (this._add_charge != value)
{
this._add_charge = value;
NotifyPropertyChanged("AdditionalCharges");
}
}
}
double _total_amount = 0.0;
public double TotalAmount
{
get { return this._total_amount; }
set
{
if (this._total_amount != value)
{
this._total_amount = value;
NotifyPropertyChanged("TotalAmount");
}
}
}
public void Update()
{
KwHUsed = NewReading - LastReading;
KwhUsedAmount = KwHUsed * KwhPerSubmeter;
TotalAmount = KwhUsedAmount + AdditionalCharges;
}
#region INotifyPropertyChanged
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(String info)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(info));
}
}
#endregion
}
}
这是DataStore模型
using System;
using System.Collections.ObjectModel;
namespace ElectricSubmeterBillComputation.Models
{
using System.ComponentModel;
public class DataStore : INotifyPropertyChanged
{
ObservableCollection<ItemFields> _allItems;
public ObservableCollection<ItemFields> AllItems
{
get { return this._allItems; }
set
{
_allItems = value;
NotifyPropertyChanged("AllItems");
}
}
public void UpdateAllAmounts(double AdditionalChargersPerSubmeter)
{
foreach (ItemFields item in _allItems)
{
item.AdditionalCharges = AdditionalChargersPerSubmeter;
item.Update();
}
}
#region INotifyPropertyChanged
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(String info)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(info));
}
}
#endregion
}
}
最后,我的listview
<ListView Grid.Row="3" x:Name="lvSubmeters" ItemTemplate="{StaticResource SubmeterItems}" VerticalAlignment="Top" HorizontalAlignment="Stretch" SelectionChanged="lvSubmeters_SelectionChanged">
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
</Style>
</ListView.ItemContainerStyle>
</ListView>
和SubmeterItems模板
<DataTemplate x:Name="SubmeterItems">
<Grid VerticalAlignment="Top" HorizontalAlignment="Stretch" Margin="5,5,5,5">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="166"/>
<ColumnDefinition Width="100*"/>
<ColumnDefinition Width="200"/>
</Grid.ColumnDefinitions>
<StackPanel Grid.Column="0" VerticalAlignment="Top">
<TextBlock HorizontalAlignment="Stretch" VerticalAlignment="Top" Text="{Binding MeterID}" FontSize="24" FontWeight="Bold" Foreground="#FF429AA3" />
<TextBlock HorizontalAlignment="Stretch" VerticalAlignment="Top" Text="{Binding Fullname}" FontSize="16" />
</StackPanel>
<StackPanel Grid.Column="1" VerticalAlignment="Top" Height="95">
<TextBlock HorizontalAlignment="Stretch" VerticalAlignment="Top" Text=" " FontSize="24" FontWeight="Bold" Foreground="#FF429AA3" />
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100"/>
<ColumnDefinition Width="29*"/>
</Grid.ColumnDefinitions>
<StackPanel Grid.Column="0">
<TextBlock Grid.Column="0" VerticalAlignment="Top" Text="Last Reading:" FontSize="14" Margin="0,0,5,5" />
<TextBlock Grid.Column="0" VerticalAlignment="Top" Text="New Reading:" FontSize="14" Margin="0,0,5,5" />
<TextBlock Grid.Column="0" VerticalAlignment="Top" Text="KW/H Used:" FontSize="14" Margin="0,0,5,5" />
</StackPanel>
<StackPanel Grid.Column="1">
<TextBlock Grid.Column="1" VerticalAlignment="Top" Text="{Binding LastReading}" FontSize="14" Margin="0,0,5,5" FontWeight="Bold" />
<TextBlock Grid.Column="1" VerticalAlignment="Top" Text="{Binding NewReading}" FontSize="14" Margin="0,0,5,5" FontWeight="Bold" />
<TextBlock Grid.Column="1" VerticalAlignment="Top" Text="{Binding KwHUsed}" FontSize="14" Margin="0,0,5,5" FontWeight="Bold" />
</StackPanel>
</Grid>
</StackPanel>
<StackPanel Grid.Column="2" VerticalAlignment="Bottom" HorizontalAlignment="Stretch" Background="Black">
<TextBlock HorizontalAlignment="Stretch" VerticalAlignment="Top" Text="{Binding KwhUsedAmount}" FontSize="20" FontWeight="Bold" Foreground="Red" TextAlignment="Right" Margin="0,0,5,0" />
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
<TextBlock HorizontalAlignment="Stretch" VerticalAlignment="Top" Text="+" FontSize="20" Foreground="#99FF0000" TextAlignment="Right" Margin="0,0,5,0"/>
<TextBlock HorizontalAlignment="Stretch" VerticalAlignment="Top" Text="{Binding AdditionalCharges}" FontSize="20" Foreground="#99FF0000" TextAlignment="Right" Margin="0,0,5,0"/>
</StackPanel>
<TextBlock HorizontalAlignment="Stretch" VerticalAlignment="Top" Text="{Binding TotalAmount}" FontSize="34" FontWeight="Bold" Foreground="Green" TextAlignment="Right" Margin="0,0,5,0" />
</StackPanel>
</Grid>
</DataTemplate>
最后是堆栈跟踪
at Windows.UI.Xaml.Controls.ItemsControl.put_ItemsSource(Object value)
at ElectricSubmeterBillComputation.MainPage.InitializeControls() in d:\Codes\WindowsMetro\ElectricSubmeterBillComputation\ElectricSubmeterBillComputation\MainPage.xaml.cs:line 43
at ElectricSubmeterBillComputation.MainPage..ctor() in d:\Codes\WindowsMetro\ElectricSubmeterBillComputation\ElectricSubmeterBillComputation\MainPage.xaml.cs:line 33
at ElectricSubmeterBillComputation.ElectricSubmeterBillComputation_XamlTypeInfo.XamlTypeInfoProvider.Activate_1_MainPage() in d:\Codes\WindowsMetro\ElectricSubmeterBillComputation\ElectricSubmeterBillComputation\obj\Debug\XamlTypeInfo.g.cs:line 121
at ElectricSubmeterBillComputation.ElectricSubmeterBillComputation_XamlTypeInfo.XamlUserType.ActivateInstance() in d:\Codes\WindowsMetro\ElectricSubmeterBillComputation\ElectricSubmeterBillComputation\obj\Debug\XamlTypeInfo.g.cs:line 277
答案 0 :(得分:2)
解决了它..
lvSubmeters.ItemsSource = this.store;
应该是
lvSubmeters.ItemsSource = this.store.AllItems;
所以为了制作上面的第一个代码
lvSubmeters.DataContext = this.store;
ListView应该有
ItemsSource="{Binding AllItems}"