在我的程序中,如何读取AssemblyInfo.cs:中设置的属性
[assembly: AssemblyTitle("My Product")]
[assembly: AssemblyDescription("...")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("Radeldudel inc.")]
[assembly: AssemblyProduct("My Product")]
[assembly: AssemblyCopyright("Copyright @ me 2008")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]
我想向程序的用户显示其中的一些值,所以我想知道如何从主程序和我正在使用的组件程序集中加载它们。
这相当容易。你必须使用反射。您需要一个Assembly实例,该实例表示具有要读取的属性的程序集。实现这一点的一个简单方法是:
typeof(MyTypeInAssembly).Assembly
然后你可以这样做,例如:
object[] attributes = assembly.GetCustomAttributes(typeof(AssemblyProductAttribute), false);
AssemblyProductAttribute attribute = null;
if (attributes.Length > 0)
{
attribute = attributes[0] as AssemblyProductAttribute;
}
现在,引用attribute.Product
将为您提供在AssemblyInfo.cs中传递给属性的值。当然,如果您查找的属性可能出现多次,您可能会在数组中获得GetCustomAttributes返回的多个实例,但对于希望检索的程序集级属性来说,这通常不是问题。
我创建了这个使用Linq:的扩展方法
public static T GetAssemblyAttribute<T>(this System.Reflection.Assembly ass) where T : Attribute
{
object[] attributes = ass.GetCustomAttributes(typeof(T), false);
if (attributes == null || attributes.Length == 0)
return null;
return attributes.OfType<T>().SingleOrDefault();
}
然后你就可以方便地使用它了:
var attr = targetAssembly.GetAssemblyAttribute<AssemblyDescriptionAttribute>();
if(attr != null)
Console.WriteLine("{0} Assembly Description:{1}", Environment.NewLine, attr.Description);
好的,对于最初的问题,现在可能有点过时了,但我无论如何都会把它呈现出来供将来参考。
如果你想从组件内部进行操作,请使用以下方法:
using System.Runtime.InteropServices;
using System.Reflection;
object[] customAttributes = this.GetType().Assembly.GetCustomAttributes(false);
然后,您可以迭代所有自定义属性,以找到您需要的属性,例如
foreach (object attribute in customAttributes)
{
string assemblyGuid = string.Empty;
if (attribute.GetType() == typeof(GuidAttribute))
{
assemblyGuid = ((GuidAttribute) attribute).Value;
break;
}
}
我个人非常喜欢lance Larsen和他的静态AssemblyInfo类的实现。
一个人基本上将类粘贴到他的程序集中(我通常使用已经存在的AssemblyInfo.cs文件,因为它符合命名约定)
要粘贴的代码是:
internal static class AssemblyInfo
{
public static string Company { get { return GetExecutingAssemblyAttribute<AssemblyCompanyAttribute>(a => a.Company); } }
public static string Product { get { return GetExecutingAssemblyAttribute<AssemblyProductAttribute>(a => a.Product); } }
public static string Copyright { get { return GetExecutingAssemblyAttribute<AssemblyCopyrightAttribute>(a => a.Copyright); } }
public static string Trademark { get { return GetExecutingAssemblyAttribute<AssemblyTrademarkAttribute>(a => a.Trademark); } }
public static string Title { get { return GetExecutingAssemblyAttribute<AssemblyTitleAttribute>(a => a.Title); } }
public static string Description { get { return GetExecutingAssemblyAttribute<AssemblyDescriptionAttribute>(a => a.Description); } }
public static string Configuration { get { return GetExecutingAssemblyAttribute<AssemblyConfigurationAttribute>(a => a.Configuration); } }
public static string FileVersion { get { return GetExecutingAssemblyAttribute<AssemblyFileVersionAttribute>(a => a.Version); } }
public static Version Version { get { return Assembly.GetExecutingAssembly().GetName().Version; } }
public static string VersionFull { get { return Version.ToString(); } }
public static string VersionMajor { get { return Version.Major.ToString(); } }
public static string VersionMinor { get { return Version.Minor.ToString(); } }
public static string VersionBuild { get { return Version.Build.ToString(); } }
public static string VersionRevision { get { return Version.Revision.ToString(); } }
private static string GetExecutingAssemblyAttribute<T>(Func<T, string> value) where T : Attribute
{
T attribute = (T)Attribute.GetCustomAttribute(Assembly.GetExecutingAssembly(), typeof(T));
return value.Invoke(attribute);
}
}
您添加了一个正在使用的系统;到文件的顶部,你就可以走了。
对于我的应用程序,我使用这个类来设置/获取/使用我的本地用户设置,使用:
internal class ApplicationData
{
DirectoryInfo roamingDataFolder;
DirectoryInfo localDataFolder;
DirectoryInfo appDataFolder;
public ApplicationData()
{
appDataFolder = new DirectoryInfo(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), AssemblyInfo.Product,"Data"));
roamingDataFolder = new DirectoryInfo(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),AssemblyInfo.Product));
localDataFolder = new DirectoryInfo(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), AssemblyInfo.Product));
if (!roamingDataFolder.Exists)
roamingDataFolder.Create();
if (!localDataFolder.Exists)
localDataFolder.Create();
if (!appDataFolder.Exists)
appDataFolder.Create();
}
/// <summary>
/// Gets the roaming application folder location.
/// </summary>
/// <value>The roaming data directory.</value>
public DirectoryInfo RoamingDataFolder => roamingDataFolder;
/// <summary>
/// Gets the local application folder location.
/// </summary>
/// <value>The local data directory.</value>
public DirectoryInfo LocalDataFolder => localDataFolder;
/// <summary>
/// Gets the local data folder location.
/// </summary>
/// <value>The local data directory.</value>
public DirectoryInfo AppDataFolder => appDataFolder;
}
看看拉森的网站(MVP),他有很酷的东西可以从中汲取灵感。
好吧,我试着浏览了很多资源,找到了一种提取Assembly.LoadFrom(path)
的.dll属性的方法。但不幸的是,我找不到任何好的资源。这个问题是c# get assembly attributes
上搜索最多的结果(至少对我来说),所以我想分享我的工作。
经过数小时的努力,我编写了以下简单的控制台程序来检索通用程序集属性。在这里,我提供了代码,以便任何人都可以使用它进行进一步的参考工作。
我对此使用CustomAttributes
属性。请随意评论这种方法
代码:
using System;
using System.Reflection;
namespace MetaGetter
{
class Program
{
static void Main(string[] args)
{
Assembly assembly = Assembly.LoadFrom("Path to assembly");
foreach (CustomAttributeData attributedata in assembly.CustomAttributes)
{
Console.WriteLine(" Name : {0}",attributedata.AttributeType.Name);
foreach (CustomAttributeTypedArgument argumentset in attributedata.ConstructorArguments)
{
Console.WriteLine(" >> Value : {0} n" ,argumentset.Value);
}
}
Console.ReadKey();
}
}
}
样本输出:
Name : AssemblyTitleAttribute
>> Value : "My Product"
这是在一行代码中检索特定属性的好方法。不需要特殊级别。
string company = ((AssemblyCompanyAttribute)Attribute.GetCustomAttribute(Assembly.GetExecutingAssembly(), typeof(AssemblyCompanyAttribute), false)).Company;
我使用这个:
public static string Title
{
get
{
return GetCustomAttribute<AssemblyTitleAttribute>(a => a.Title);
}
}
供参考:
using System;
using System.Reflection;
using System.Runtime.CompilerServices;
namespace Extensions
{
public static class AssemblyInfo
{
private static Assembly m_assembly;
static AssemblyInfo()
{
m_assembly = Assembly.GetEntryAssembly();
}
public static void Configure(Assembly ass)
{
m_assembly = ass;
}
public static T GetCustomAttribute<T>() where T : Attribute
{
object[] customAttributes = m_assembly.GetCustomAttributes(typeof(T), false);
if (customAttributes.Length != 0)
{
return (T)((object)customAttributes[0]);
}
return default(T);
}
public static string GetCustomAttribute<T>(Func<T, string> getProperty) where T : Attribute
{
T customAttribute = GetCustomAttribute<T>();
if (customAttribute != null)
{
return getProperty(customAttribute);
}
return null;
}
public static int GetCustomAttribute<T>(Func<T, int> getProperty) where T : Attribute
{
T customAttribute = GetCustomAttribute<T>();
if (customAttribute != null)
{
return getProperty(customAttribute);
}
return 0;
}
public static Version Version
{
get
{
return m_assembly.GetName().Version;
}
}
public static string Title
{
get
{
return GetCustomAttribute<AssemblyTitleAttribute>(
delegate(AssemblyTitleAttribute a)
{
return a.Title;
}
);
}
}
public static string Description
{
get
{
return GetCustomAttribute<AssemblyDescriptionAttribute>(
delegate(AssemblyDescriptionAttribute a)
{
return a.Description;
}
);
}
}
public static string Product
{
get
{
return GetCustomAttribute<AssemblyProductAttribute>(
delegate(AssemblyProductAttribute a)
{
return a.Product;
}
);
}
}
public static string Copyright
{
get
{
return GetCustomAttribute<AssemblyCopyrightAttribute>(
delegate(AssemblyCopyrightAttribute a)
{
return a.Copyright;
}
);
}
}
public static string Company
{
get
{
return GetCustomAttribute<AssemblyCompanyAttribute>(
delegate(AssemblyCompanyAttribute a)
{
return a.Company;
}
);
}
}
public static string InformationalVersion
{
get
{
return GetCustomAttribute<AssemblyInformationalVersionAttribute>(
delegate(AssemblyInformationalVersionAttribute a)
{
return a.InformationalVersion;
}
);
}
}
public static int ProductId
{
get
{
return GetCustomAttribute<AssemblyProductIdAttribute>(
delegate(AssemblyProductIdAttribute a)
{
return a.ProductId;
}
);
}
}
public static string Location
{
get
{
return m_assembly.Location;
}
}
}
}
如果您知道要查找的属性是唯一的,那么使用Attribute
类的这个经常被忽视的静态辅助方法会容易得多:
var attribute = Attribute.GetCustomAttribute(assembly, typeof(AssemblyTitleAttribute))
这更容易,因为您不需要处理数组,也不需要担心那个烦人的inherit
参数。您只需直接获取单个属性值,如果不存在,则直接获取null
。