Question

作为一名Web开发人员，我知道什么是数据注释以及它们如何在ASP.NET中工作，但是我的问题是它们如何在后台工作？当我们使用它们时，代码会发生什么？

例如：

public class C 
{
    [Required]
    public string Name {get; set;}
}

编译为：

.class private auto ansi '<Module>'
{
} // end of class <Module>

.class public auto ansi beforefieldinit C
    extends [mscorlib]System.Object
{
    // Fields
    .field private string '<Name>k__BackingField'
    .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
        01 00 00 00
    )

    // Methods
    .method public hidebysig specialname 
        instance string get_Name () cil managed 
    {
        .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
            01 00 00 00
        )
        // Method begins at RVA 0x2050
        // Code size 7 (0x7)
        .maxstack 8

        IL_0000: ldarg.0
        IL_0001: ldfld string C::'<Name>k__BackingField'
        IL_0006: ret
    } // end of method C::get_Name

    .method public hidebysig specialname 
        instance void set_Name (
            string 'value'
        ) cil managed 
    {
        .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
            01 00 00 00
        )
        // Method begins at RVA 0x2058
        // Code size 8 (0x8)
        .maxstack 8

        IL_0000: ldarg.0
        IL_0001: ldarg.1
        IL_0002: stfld string C::'<Name>k__BackingField'
        IL_0007: ret
    } // end of method C::set_Name

    .method public hidebysig specialname rtspecialname 
        instance void .ctor () cil managed 
    {
        // Method begins at RVA 0x2061
        // Code size 7 (0x7)
        .maxstack 8

        IL_0000: ldarg.0
        IL_0001: call instance void [mscorlib]System.Object::.ctor()
        IL_0006: ret
    } // end of method C::.ctor

    // Properties
    .property instance string Name()
    {
        .custom instance void [System.ComponentModel.DataAnnotations]System.ComponentModel.DataAnnotations.RequiredAttribute::.ctor() = (
            01 00 00 00
        )
        .get instance string C::get_Name()
        .set instance void C::set_Name(string)
    }

}
// end of class C

首先，什么是.custom实例void ...... ??

第二个c＃如何与该.custom ..一起工作以了解在这种情况下是否需要该属性？

数据注释如何在后台工作

0 个答案: