首页 \ 问答 \ Unsafe.AsPointer （ref T值）如何工作？(How Unsafe.AsPointer(ref T value) works?)

Unsafe.AsPointer （ref T值）如何工作？(How Unsafe.AsPointer(ref T value) works?)

 在C＃中，您不能创建指向托管类型的指针，但使用此API，您可以使用Unsafe.AsPointer<T> 。 
 

 https://www.nuget.org/packages/System.Runtime.CompilerServices.Unsafe/ 
 

 我看到使用ILSpy的源代码，我看到了这个： 
 

[MethodImpl(MethodImplOptions.AggressiveInlining)]
[System.Runtime.Versioning.NonVersionable]
public unsafe static void* AsPointer<T>(ref T value)
{
    return &value;
}

 

 另外在其他类似的API中： 
 

//Unity.Collections.LowLevel.Unsafe.UnsafeUtility
public unsafe static T ReadArrayElement<T>(void* source, int index)
{
    return *(T*)((byte*)source + index * sizeof(T));
}

 

 这是如何工作的以及如何复制这种行为？ 

In C# you're not suppose to be able to create pointer to managed types but with this API you are able to, using Unsafe.AsPointer<T>.
 

https://www.nuget.org/packages/System.Runtime.CompilerServices.Unsafe/
 

I see the source code using ILSpy and I saw this:
 

[MethodImpl(MethodImplOptions.AggressiveInlining)]
[System.Runtime.Versioning.NonVersionable]
public unsafe static void* AsPointer<T>(ref T value)
{
    return &value;
}

 

Also in other similar API:
 

//Unity.Collections.LowLevel.Unsafe.UnsafeUtility
public unsafe static T ReadArrayElement<T>(void* source, int index)
{
    return *(T*)((byte*)source + index * sizeof(T));
}

 

How this works and how is possible to replicate that behaviour? 

原文：https://stackoverflow.com/questions/51599375
更新时间：2023-11-21 18:11

最满意答案

 您正在寻找一种通用方法： 
 

private static void SetEntityPropertiesRequired<TEntity>(DbModelBuilder modelBuilder)
{
    //set all decimal properties in Projection Entity to be Required
    var decimalproperties = typeof (TEntity).GetProperties()
    ...


You're looking for a generic method:
 

private static void SetEntityPropertiesRequired<TEntity>(DbModelBuilder modelBuilder)
{
    //set all decimal properties in Projection Entity to be Required
    var decimalproperties = typeof (TEntity).GetProperties()
    ...

相关问答

更多