我仍然习惯MVVM，所以如果有更好的方法，请告诉我。我必须坚持某种做事方式，所以我工作的公司的一切都保持一定的标准。我正在尝试使用我的Enum类中的描述填充组合框。我认为这是一项简单的任务，但我不知道该怎么做。任何帮助表示赞赏。如果您需要更多代码或信息，请告诉我们。代码如下。
我在一个名为Enum.cs的类中有我的描述：
[TypeConverter(typeof(EnumToStringUsingDescription))]
public enum ArTypes
{
[Description("(All)")]
arAll = 0,
[Description("Adjustment")]
[EnumInformation("Adjustment", true, 1)]
arAdjustment = 1,
[Description("Payment")]
[EnumInformation("Payment", true, 2)]
arPayment = 3,
[Description("Deposit Receipt")]
[EnumInformation("Deposit Receipt", true, 3)]
arDepositReceipt = 5,
[Description("Deposit Applied")]
[EnumInformation("Deposit Applied", true, 4)]
arDepositApplied = 7,
[Description("Bad Debt Transfer")]
[EnumInformation("Bad Debt Transfer", true, 5)]
arBadDebtTransfer = 9,
[Description("Bad Debt Writeoff")]
[EnumInformation("Bad Debt Writeoff", true, 6)]
arBadDebtWriteoff = 11,
[Description("Bad Debt Recovery")]
[EnumInformation("Bad Debt Recovery", true, 7)]
arBadDebtRecovery = 13,
[Description("Charge")]
[EnumInformation("Charge", true, 8)]
arCharge = 15,
[Description("Immediate Case Receipt")]
[EnumInformation("Immediate Cash Receipt", true, 9)]
arImmediateCashReceipt = 17,
[Description("Over Payment")]
[EnumInformation("Over Payment", true, 10)]
arOverPayment = 19,
[Description("Balance Forward")]
[EnumInformation("Balance Forward", true, 11)]
arBalanceForward = 21
}
在我的viewmodel中，我有填充组合框的代码：
public IEnumerable<ArTypes> GetAllArTypesData()
{
try
{
//I believe the logic for setting the Ienumberable would go here
}
catch (Exception ex)
{
LogException(ex);
}
return null;
}
要填充我正在运行的组合框：
void PopulateComboLists()
{
CycleList = new ObservableCollection<Cycle>();
ServiceTypeList = new ObservableCollection<ServiceType>();
RateList = new ObservableCollection<Rate>();
CustomerTypeList = new ObservableCollection<CustomerType>();
ArCodeList = new ObservableCollection<Arcode>();
ArTypeList = new ObservableCollection<ArTypes>();
CycleList.Add(new Cycle() { CycleID = -1, CycleDescription = "(All)" });
ServiceTypeList.Add(new ServiceType() { ServiceTypeID = -1, ServiceDescription = "(All)" });
CustomerTypeList.Add(new CustomerType() { CustomerTypeID = -1, Description = "(All)" });
ArCodeList.Add(new Arcode() { ArcodeID = -1, Description = "(All)" });
foreach (var item in cycles)
{
CycleList.Add(item);
}
foreach (var item in serviceTypes)
{
ServiceTypeList.Add(item);
}
foreach (var item in rates)
{
RateList.Add(item);
}
foreach (var item in custTypes)
{
CustomerTypeList.Add(item);
}
foreach (var item in arCodes)
{
ArCodeList.Add(item);
}
foreach (var item in arTypes)
{
ArTypeList.Add(item);
}
}
以下是将数据加载到UI的位置：
protected override void LoadDataStart()
{
//*Insert IsBusy and any other logic needed before database calls*//
this.IsBusy = true;
this.BusyMessage = "Generating Widget...";
try
{
//*Create a method for each database call - start a new task for each*//
var taskCTR = Task.Factory.StartNew(() => GetAllCustomerTypeReportsData()).ContinueWith(results => GetAllCustomerTypeReportsDataContinue(results.Result));
var taskST = Task.Factory.StartNew(() => GetAllServiceTypesData()).ContinueWith(results => GetAllServiceTypesDataContinue(results.Result));
var taskRL = Task.Factory.StartNew(() => GetAllRatesData()).ContinueWith(results => GetAllRatesDataContinue(results.Result));
var taskCL = Task.Factory.StartNew(() => GetAllCyclesData()).ContinueWith(results => GetAllCyclesDataContinue(results.Result));
var taskCT = Task.Factory.StartNew(() => GetAllCustomerTypesData()).ContinueWith(results => GetAllCustomerTypesDataContinue(results.Result));
var taskAC = Task.Factory.StartNew(() => GetAllArCodesData()).ContinueWith(results => GetAllArCodesDataContinue(results.Result));
var taskAT = Task.Factory.StartNew(() => GetAllArTypesData()).ContinueWith(results => GetAllArTypesDataContinue(results.Result));
Task[] allTasks = new Task[7] { taskCTR, taskST, taskRL, taskCL, taskCT, taskAC, taskAT };
Task.Factory.ContinueWhenAll(allTasks, loadDataContinue =>
{
Action executeContinue = () =>
{
PopulateComboLists();
if (CanLoad)
{
LoadDataContinue();
IsBusy = false;
}
else
ShowOptionsView();
};
this.UIDispatcher.Invoke(executeContinue);
});
}
catch (Exception ex)
{
LogException(ex);
}
//*Base class will call LoadDataContinue() once the database calls are complete*//
}
XAML：
<Label VerticalAlignment="Center" Margin="5,0,0,0" Content="ArType: " Grid.Row="5" Grid.Column="0"></Label>
<telerik:RadComboBox ItemsSource="{Binding ArTypeList}"
DisplayMemberPath="Key"
SelectedValuePath="Value"
HorizontalAlignment="Left" Width="190"
SelectedValue="{Binding Path=SelectedArType, Mode=TwoWay, ValidatesOnDataErrors=True}"
TabIndex="5" Grid.Row="5" VerticalAlignment="Center" Grid.Column="1"
Style="{StaticResource RadComboBoxStyle}" />
答案 0 :(得分：1)
如果您询问如何从每个DescriptionAttribute实例上的enum收集值，您可以这样做：
ObservableCollection descriptions = new ObservableCollection();
foreach (object instance in Enum.GetValues(typeof(ArTypes)))
{
FieldInfo fieldInfo = typeof(ArTypes).GetField(instance.ToString());
object[] customAttributes =
fieldInfo.GetCustomAttributes(typeof(DescriptionAttribute), false);
if (customAttributes != null && customAttributes.Length > 0)
descriptions.Add(((DescriptionAttribute)customAttributes[0]).Description);
}
因为我现在无法测试，所以可能会出现错误，所以如果有，请告诉我。
答案 1 :(得分：1)
这可以通过使用comboBox的转换器和项目模板来完成。
这是转换器代码，当绑定到枚举时将返回Description值：
namespace Focal.FirmwareUpdate.UI.WPF.Common.Converters
{
public class EnumDescriptionConverter : IValueConverter
{
private string GetEnumDescription(Enum enumObj)
{
FieldInfo fieldInfo = enumObj.GetType().GetField(enumObj.ToString());
object[] attribArray = fieldInfo.GetCustomAttributes(false);
if (attribArray.Length == 0)
{
return enumObj.ToString();
}
else
{
DescriptionAttribute attrib = attribArray[0] as DescriptionAttribute;
return attrib.Description;
}
}
object IValueConverter.Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
Enum myEnum = (Enum)value;
string description = GetEnumDescription(myEnum);
return description;
}
object IValueConverter.ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
return string.Empty;
}
}
然后在你的xaml中你需要使用和项目模板。
<ComboBox Grid.Row="1" Grid.Column="1" Height="25" Width="100" Margin="5"
ItemsSource="{Binding Path=MyEnums}"
SelectedItem="{Binding Path=MySelectedItem}"
>
<ComboBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Converter={StaticResource enumDescriptionConverter}}"/>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>