我使用this post中的代码来实现应用程序中的功能切换,并且它运行良好。但是,现在不是我的功能是直接bool开/关,每个功能都有两个bool值:一个用于常规设置,另一个用于设置,仅适用于用户子集。我一直在尝试更新代码来处理这个问题,而且我发现我对反射和访问器的基本理解已经很短了。
我正在使用下面的代码在LINQPad中进行测试 - 基本上,与上面提到的帖子相比,我所做的一切都是尝试从bool更改TestFeatureToggle,输入MultiToggle但是我很难设置或获取MultiToggle对象的bool属性的值。
我得到一个例外return (bool)multiToggleProperty.GetValue(null,null);
“非静态方法需要目标”。这是有道理的,因为MultiToggle上的属性是非静态的。但是,我没有这些对象的实例,我不明白如何从静态类中获取它。
任何帮助都会非常感激。我的直觉说这可能不可能!
void Main()
{
var exampleFeatureToggles = new List<FeatureToggle>
{
new FeatureToggle {Description = "Test", Id = 1, IsActive = true, Name = "TestFeatureToggle"}
};
FeatureToggles.SetFeatureToggles(exampleFeatureToggles);
Console.WriteLine(FeatureToggles.GetFeatureToggleSetting("TestFeatureToggle"));
}
public class FeatureToggle
{
public string Description { get; set; }
public int Id { get; set; }
public bool IsActive { get; set; }
public string Name { get; set; }
}
public class MultiToggle
{
public bool DefaultValue { get; private set; }
public bool OtherValue { get; private set; }
}
public static class FeatureToggles
{
//public static bool TestFeatureToggle { get; private set; }
public static MultiToggle TestFeatureToggle { get; private set; }
public static void SetFeatureToggles(List<FeatureToggle> toggles)
{
if (toggles == null) return;
var properties = typeof(FeatureToggles).GetProperties(BindingFlags.Public | BindingFlags.Static);
// All properties must be set to false to prevent a property staying true when deleted from the database
foreach (var property in properties)
{
var multiToggleProperties = typeof(MultiToggle).GetProperties();
foreach (var multiToggleProperty in multiToggleProperties)
{
multiToggleProperty.SetValue(new MultiToggle(), false, null);
}
}
foreach (var toggle in toggles)
{
foreach (var property in properties)
{
if (property.Name.ToLower() == toggle.Name.ToLower())
{
Type tProp = property.GetType();
var multiToggleProperties = typeof(MultiToggle).GetProperties();
foreach (var multiToggleProperty in multiToggleProperties)
{
Console.WriteLine(multiToggleProperty);
multiToggleProperty.SetValue(new MultiToggle(), toggle.IsActive, null);
}
}
}
}
}
public static bool GetFeatureToggleSetting(string propertyName)
{
var properties = typeof(FeatureToggles).GetProperties(BindingFlags.Public | BindingFlags.Static);
foreach (var property in properties)
{
if (property.Name.ToLower() == propertyName.ToLower())
{
Type tProp = property.GetType();
var multiToggleProperties = typeof(MultiToggle).GetProperties();
Console.WriteLine(multiToggleProperties);
foreach (var multiToggleProperty in multiToggleProperties)
{
Console.WriteLine(multiToggleProperty);
return (bool)multiToggleProperty.GetValue(null, null);
}
}
}
return false;
}
}
答案 0 :(得分:1)
这个想法在那里,但你基本上“只是超越了标记”。您正在获取“非静态方法需要目标”错误,因为您试图获取静态属性值中的属性值,而不首先获取静态属性的值(多么令人满意)。即你要去:
get static property type -> get instance property type -> get value of property from static property.
DefaultValue
和OtherValue
是实例属性,因此在获得其值之前,您首先需要实例对象。我做了一些调整,只是为了向您展示如何设置静态属性并从静态属性中获取值。你应该可以从那里调整它:
void Main()
{
var exampleFeatureToggles = new List<FeatureToggle>
{
new FeatureToggle {Description = "Test", Id = 1, IsActive = true, Name = "TestFeatureToggle"}
};
FeatureToggles.SetFeatureToggles(exampleFeatureToggles);
Console.WriteLine(FeatureToggles.GetFeatureToggleSetting("TestFeatureToggle"));
}
public class FeatureToggle
{
public string Description { get; set; }
public int Id { get; set; }
public bool IsActive { get; set; }
public string Name { get; set; }
}
public class MultiToggle
{
public bool DefaultValue { get; private set; }
public bool OtherValue { get; private set; }
}
public static class FeatureToggles
{
//public static bool TestFeatureToggle { get; private set; }
public static MultiToggle TestFeatureToggle { get; private set; }
public static void SetFeatureToggles(List<FeatureToggle> toggles)
{
if (toggles == null) return;
var properties = typeof(FeatureToggles).GetProperties(BindingFlags.Public | BindingFlags.Static);
// All properties must be set to false to prevent a property staying true when deleted from the database
foreach (var property in properties)
{
// first change: set the _property_, not multiToggleProperty
property.SetValue(null, new MultiToggle());
}
foreach (var toggle in toggles)
{
foreach (var property in properties)
{
if (property.Name.ToLower() == toggle.Name.ToLower())
{
Type tProp = property.GetType();
var multiToggleProperties = typeof(MultiToggle).GetProperties();
// second change: create a nee instance, set the values, then set that value on the static property
var newMultiToggle = new MultiToggle();
property.SetValue(null, newMultiToggle);
foreach (var multiToggleProperty in multiToggleProperties)
{
Console.WriteLine(multiToggleProperty);
multiToggleProperty.SetValue(newMultiToggle, toggle.IsActive, null);
}
}
}
}
}
public static bool GetFeatureToggleSetting(string propertyName)
{
var properties = typeof(FeatureToggles).GetProperties(BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy);
foreach (var property in properties)
{
if (property.Name.ToLower() == propertyName.ToLower())
{
Type tProp = property.GetType();
// third change: get the static value first, then get the value from the properties on that instance.
var value = property.GetValue(null);
var multiToggleProperties = typeof(MultiToggle).GetProperties();
Console.WriteLine(multiToggleProperties);
foreach (var multiToggleProperty in multiToggleProperties)
{
Console.WriteLine(multiToggleProperty);
return (bool)multiToggleProperty.GetValue(value, null); //
}
}
}
return false;
}
}