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C#•2y ago

❔ Reflections and generics

So i have a type instance list and i'm iterating trough all the fields that the propertyType.Name.Contains("ExtensionConfig"), that type has a method which i need to invoke foreach field and i'm iterating trough the fields So basically the problem comes when i do (field as PropertyInfo).GetValue(type) shows invalid cast exception, and i can't cast because the target type has a generic type which in every field is different

52 Replies

memwOP•2y ago

foreach (Type type in Assembly.GetAssembly(typeof(Extension)).GetTypes().Where(myType => myType.IsClass && !myType.IsAbstract && myType.IsSubclassOf(typeof(Extension))))
        {
            ExtensionInstances.Add((Extension)System.Activator.CreateInstance(type, null));
            foreach (PropertyInfo field in type.GetProperties().Where(p => p.PropertyType.Name.Contains("ExtensionConfig")))
            {
                
                
                //info.Invoke(field.GetValue(type), new object[] { type.Name });
            }
        }
        ExtensionInstances.Sort();

foreach (Type type in Assembly.GetAssembly(typeof(Extension)).GetTypes().Where(myType => myType.IsClass && !myType.IsAbstract && myType.IsSubclassOf(typeof(Extension))))
        {
            ExtensionInstances.Add((Extension)System.Activator.CreateInstance(type, null));
            foreach (PropertyInfo field in type.GetProperties().Where(p => p.PropertyType.Name.Contains("ExtensionConfig")))
            {
                
                
                //info.Invoke(field.GetValue(type), new object[] { type.Name });
            }
        }
        ExtensionInstances.Sort();

in the foreach inside i'm iterating trough all the fields but i can't get it's value nor invoke any method inside

TheRanger•2y ago

field is a FieldInfo, not a PropertyInfo

memwOP•2y ago

TheRanger•2y ago

GetProperties() returns properties not fields try GetFields instead are u trying to return fields or properties? can u show ur class that ur trying to fetch fields or properties from?

memwOP•2y ago

so basically it's like this

public class SendSteamId : Extension
{
    private DiscordWebhook _webhook = null!;
    
    public ExtensionConfig<string> URL => new("url", "https://discord.com/api/webhooks/1052150142393913364/u6XndhiV-ovZx99iZxC4savuDAklOQ7PVXNd5Im6vEbs4oxym5p1CNSBkYGP_fCXBy18", "Where the embed will be sent");
    public ExtensionConfig<bool> Enabled => new("toggle", true, "Whether to enable or disable the plugin");
    public ExtensionConfig<string> Key => new("key", "p", "What keybind should the plugin use to send the embed");
    public ExtensionConfig<Method> MessageMethod => new("method", Method.OnRoundStart, "Should the plugin send the embed on round start or on keybind press?");
    
    public override void Start(){}
    public override void Update(){}
}

public class SendSteamId : Extension
{
    private DiscordWebhook _webhook = null!;
    
    public ExtensionConfig<string> URL => new("url", "https://discord.com/api/webhooks/1052150142393913364/u6XndhiV-ovZx99iZxC4savuDAklOQ7PVXNd5Im6vEbs4oxym5p1CNSBkYGP_fCXBy18", "Where the embed will be sent");
    public ExtensionConfig<bool> Enabled => new("toggle", true, "Whether to enable or disable the plugin");
    public ExtensionConfig<string> Key => new("key", "p", "What keybind should the plugin use to send the embed");
    public ExtensionConfig<Method> MessageMethod => new("method", Method.OnRoundStart, "Should the plugin send the embed on round start or on keybind press?");
    
    public override void Start(){}
    public override void Update(){}
}

this is the class i'm trying to get the fields

TheRanger•2y ago

ok thats a property those arent fields

memwOP•2y ago

yeah that is what i was getting get properties and so i need to access it's value, and it's value contains a method that is InitConfig

public class ExtensionConfig<T>
{
    private readonly string _settingName;
    private readonly T _defaultValue;
    private readonly string _description;

    public T Value { get; protected set; } = default!;
    
    public ExtensionConfig(string settingName, T defaultValue, string description)
    {
        _settingName = settingName;
        _defaultValue = defaultValue;
        _description = description;
    }

    public void InitConfig(string methodName)
    {
        Instance.Log.LogInfo(methodName);
        Value = StaticConfig.Bind(methodName, _settingName, _defaultValue, _description).Value;
    }
}

public class ExtensionConfig<T>
{
    private readonly string _settingName;
    private readonly T _defaultValue;
    private readonly string _description;

    public T Value { get; protected set; } = default!;
    
    public ExtensionConfig(string settingName, T defaultValue, string description)
    {
        _settingName = settingName;
        _defaultValue = defaultValue;
        _description = description;
    }

    public void InitConfig(string methodName)
    {
        Instance.Log.LogInfo(methodName);
        Value = StaticConfig.Bind(methodName, _settingName, _defaultValue, _description).Value;
    }
}

this is the type and i need to run InitConfig basically but i always get that invalid cast exception

TheRanger•2y ago

so can u show the image where its throwing invalid cast exception ?

memwOP•2y ago

sure

TheRanger•2y ago

brb

memwOP•2y ago

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.InvalidCastException: Specified cast is not valid.
  at (wrapper castclass) System.Object.__castclass_with_cache(object,intptr,intptr)
  at System.Reflection.RuntimePropertyInfo.GetterAdapterFrame[T,R] (System.Reflection.RuntimePropertyInfo+Getter`2[T,R] getter, System.Object obj) [0x00000] in <986ed57b9a8f4699a3c59a69eb05944a>:0 
  at System.Reflection.RuntimePropertyInfo.GetValue (System.Object obj, System.Object[] index) [0x0006c] in <986ed57b9a8f4699a3c59a69eb05944a>:0 
   --- End of inner exception stack trace ---
  at System.Reflection.RuntimePropertyInfo.GetValue (System.Object obj, System.Object[] index) [0x00080] in <986ed57b9a8f4699a3c59a69eb05944a>:0 
  at System.Reflection.PropertyInfo.GetValue (System.Object obj) [0x00000] in <986ed57b9a8f4699a3c59a69eb05944a>:0 
  at CrabGameUtils.Plugin.Load () [0x000e0] in <36fe78a30a03475bb7e6152333288d25>:0 
  at BepInEx.IL2CPP.IL2CPPChainloader.LoadPlugin (BepInEx.PluginInfo pluginInfo, System.Reflection.Assembly pluginAssembly) [0x00011] in <e9997477cd8143c9a348224def0a337e>:0 
  at BepInEx.Bootstrap.BaseChainloader`1[TPlugin].LoadPlugins (System.Collections.Generic.IList`1[T] plugins) [0x0025c] in <16694cdb03bf4887828a298c286d045b>:0

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.InvalidCastException: Specified cast is not valid.
  at (wrapper castclass) System.Object.__castclass_with_cache(object,intptr,intptr)
  at System.Reflection.RuntimePropertyInfo.GetterAdapterFrame[T,R] (System.Reflection.RuntimePropertyInfo+Getter`2[T,R] getter, System.Object obj) [0x00000] in <986ed57b9a8f4699a3c59a69eb05944a>:0 
  at System.Reflection.RuntimePropertyInfo.GetValue (System.Object obj, System.Object[] index) [0x0006c] in <986ed57b9a8f4699a3c59a69eb05944a>:0 
   --- End of inner exception stack trace ---
  at System.Reflection.RuntimePropertyInfo.GetValue (System.Object obj, System.Object[] index) [0x00080] in <986ed57b9a8f4699a3c59a69eb05944a>:0 
  at System.Reflection.PropertyInfo.GetValue (System.Object obj) [0x00000] in <986ed57b9a8f4699a3c59a69eb05944a>:0 
  at CrabGameUtils.Plugin.Load () [0x000e0] in <36fe78a30a03475bb7e6152333288d25>:0 
  at BepInEx.IL2CPP.IL2CPPChainloader.LoadPlugin (BepInEx.PluginInfo pluginInfo, System.Reflection.Assembly pluginAssembly) [0x00011] in <e9997477cd8143c9a348224def0a337e>:0 
  at BepInEx.Bootstrap.BaseChainloader`1[TPlugin].LoadPlugins (System.Collections.Generic.IList`1[T] plugins) [0x0025c] in <16694cdb03bf4887828a298c286d045b>:0

this is bascially the error i get i should mention this is BepInEx that happens when i call field.GetValue(type)

TheRanger•2y ago

call it property not field, to avoid confustion

memwOP•2y ago

ok

memwOP•2y ago

TheRanger•2y ago

so this Log.LogInfo line is throwing the error?

memwOP•2y ago

ye whenever i invoke GetValue(type)

TheRanger•2y ago

GetValue expects an instance, not a type

memwOP•2y ago

oh. you are right i don't need to iterate the types but the instances damn

TheRanger•2y ago

no

memwOP•2y ago

i store the instances in a list

TheRanger•2y ago

you need to iterate the types to get the properties

vdvman1•2y ago

They probably want to iterate the instances, and call GetType() on each instance to get the type

TheRanger•2y ago

but you need to know which instance to get the value of specified property

memwOP•2y ago

i have an idea

foreach (Type type in Assembly.GetAssembly(typeof(Extension)).GetTypes().Where(myType => myType.IsClass && !myType.IsAbstract && myType.IsSubclassOf(typeof(Extension))))
        {
            Extension instance = (Extension)System.Activator.CreateInstance(type, null);
            ExtensionInstances.Add(instance);
            foreach (PropertyInfo property in type.GetProperties().Where(p => p.PropertyType.Name.Contains("ExtensionConfig")))
            {
                Log.LogInfo(property.GetValue(instance));
                //info.Invoke(field.GetValue(type), new object[] { type.Name });
            }
        }

foreach (Type type in Assembly.GetAssembly(typeof(Extension)).GetTypes().Where(myType => myType.IsClass && !myType.IsAbstract && myType.IsSubclassOf(typeof(Extension))))
        {
            Extension instance = (Extension)System.Activator.CreateInstance(type, null);
            ExtensionInstances.Add(instance);
            foreach (PropertyInfo property in type.GetProperties().Where(p => p.PropertyType.Name.Contains("ExtensionConfig")))
            {
                Log.LogInfo(property.GetValue(instance));
                //info.Invoke(field.GetValue(type), new object[] { type.Name });
            }
        }

this should work

TheRanger•2y ago

well if those properties are static, u dont need to pass an instance as an argument, just a null

vdvman1•2y ago

That assumes it's ok to create an instance and then discard it And in that case you could potentially use static fields/properties instead of instance fields/properties

memwOP•2y ago

they aren't static

TheRanger•2y ago

i know but im saying if they are

memwOP•2y ago

it adds it to a static list i only need to run this one time

vdvman1•2y ago

Oh right, I missed that bit

memwOP•2y ago

Extension instance = (Extension)System.Activator.CreateInstance(type, null);
            ExtensionInstances.Add(instance);
            foreach (PropertyInfo property in type.GetProperties().Where(p => p.PropertyType.Name.Contains("ExtensionConfig")))
            {
                Log.LogInfo(property.GetValue(instance).GetType().GetMethod("InitValue")!.Invoke(instance, new object[]{type.Name}));
            }

Extension instance = (Extension)System.Activator.CreateInstance(type, null);
            ExtensionInstances.Add(instance);
            foreach (PropertyInfo property in type.GetProperties().Where(p => p.PropertyType.Name.Contains("ExtensionConfig")))
            {
                Log.LogInfo(property.GetValue(instance).GetType().GetMethod("InitValue")!.Invoke(instance, new object[]{type.Name}));
            }

this should be able to invoke the InitValue method from the instance if i'm not wrong

TheRanger•2y ago

try and see

memwOP•2y ago

sounds like method is null

memwOP•2y ago

https://tenor.com/view/csharp-rage-exception-error-rage-meme-gif-25177242

Tenor

memwOP•2y ago

imma see what methods there are maybe i'm looking on the wrong place

TheRanger•2y ago

GetMethod gets public methods by default otherwise you need to pass BindingFlags argument

memwOP•2y ago

the method is public and non static

TheRanger•2y ago

ok

memwOP•2y ago

public void InitConfig(string methodName)
    {
        Instance.Log.LogInfo(methodName);
        Value = StaticConfig.Bind(methodName, _settingName, _defaultValue, _description).Value;
    }

public void InitConfig(string methodName)
    {
        Instance.Log.LogInfo(methodName);
        Value = StaticConfig.Bind(methodName, _settingName, _defaultValue, _description).Value;
    }

TheRanger•2y ago

yeah you typod its InitConfig not InitValue

memwOP•2y ago

oops Object does not match target type

TheRanger•2y ago

show image, and brb

memwOP•2y ago

[Error  :   BepInEx] Error loading [CrabGameUtils 1.0.0]: System.Reflection.TargetException: Object does not match target type.
  at System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00024] in <986ed57b9a8f4699a3c59a69eb05944a>:0 
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <986ed57b9a8f4699a3c59a69eb05944a>:0 
  at CrabGameUtils.Plugin.Load () [0x00103] in <3223e68ea61a4b20a5289787755ee603>:0 
  at BepInEx.IL2CPP.IL2CPPChainloader.LoadPlugin (BepInEx.PluginInfo pluginInfo, System.Reflection.Assembly pluginAssembly) [0x00011] in <e9997477cd8143c9a348224def0a337e>:0 
  at BepInEx.Bootstrap.BaseChainloader`1[TPlugin].LoadPlugins (System.Collections.Generic.IList`1[T] plugins) [0x0025c] in <16694cdb03bf4887828a298c286d045b>:0

[Error  :   BepInEx] Error loading [CrabGameUtils 1.0.0]: System.Reflection.TargetException: Object does not match target type.
  at System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00024] in <986ed57b9a8f4699a3c59a69eb05944a>:0 
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <986ed57b9a8f4699a3c59a69eb05944a>:0 
  at CrabGameUtils.Plugin.Load () [0x00103] in <3223e68ea61a4b20a5289787755ee603>:0 
  at BepInEx.IL2CPP.IL2CPPChainloader.LoadPlugin (BepInEx.PluginInfo pluginInfo, System.Reflection.Assembly pluginAssembly) [0x00011] in <e9997477cd8143c9a348224def0a337e>:0 
  at BepInEx.Bootstrap.BaseChainloader`1[TPlugin].LoadPlugins (System.Collections.Generic.IList`1[T] plugins) [0x0025c] in <16694cdb03bf4887828a298c286d045b>:0

this is all it gives a runtime error oh i see it works now thanks

TheRanger•2y ago

well yes when the exception gets thrown, you can see in the debugger what type is being invoked

memwOP•2y ago

nop, i can't see because i can't debug like that this is a class library that gets ran by an injector but it kinda works now i just have a dilema which is kinda weird if imma say so myself

TheRanger•2y ago

well use Console.WriteLine to debug what are u trying to inject anyway?

memwOP•2y ago

it's a mod for crabgame injected trough bepinex as all the methods and stuff are obfuscated because the references are from il2cpp... i'm kinda making something to make this easier

TheRanger•2y ago

what? does the game allow you to mod it?

memwOP•2y ago

well no bepinex just searches the program memory or something

TheRanger•2y ago

that can get you banned from this server tho

memwOP•2y ago

that are not hacks it's nothing harmful at all and also the game creator says he doesn't care meanwhile it's not harmful, well said once he just didn't implement a way to mod the game cuz it doesn't get updated since 2 years ago and people seeking ways to make it a better experience

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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