C# - Get calling method's Assembly?
Is there a way in C# to get the Assembly of the calling method? (Not the current method.)
i.e. I want the exe开发者_高级运维cuting assembly, one above in the call stack.
Try this
Assembly.GetCallingAssembly();
How about this:
StackTrace stackTrace = new StackTrace(); // get call stack
var assembly = stackTrace.GetFrame(0).GetMethod().DeclaringType.Assembly;
With help from http://www.csharp-examples.net/reflection-callstack/
This is what I use:
var stackFrames = new StackTrace().GetFrames();
if(stackFrames==null) return null;
var executingAssembly = Assembly.GetExecutingAssembly();
foreach (var frame in stackFrames)
{
var assembly = frame.GetMethod().DeclaringType.Assembly;
if (assembly != executingAssembly)
{
return assembly;
}
}
return null;
No it's not possible to reliably understand who is calling you. Some people will undoubtedly suggest a stack walk but that is unreliable due to JIT inlining. There is just no way to reliably get the method / assembly which is calling your method.
Wrote this to get the AssemblyInfo.cs attributes for the calling assembly -- so uses the "GetAssembly(int stackTraceLevel)" method that does what is needed...
All this is also up on my blog at http://lancelarsen.com/reading-values-from-assemblyinfo-cs/
Enjoy
/// <summary>
/// Gets the values from the AssemblyInfo.cs file for the previous assembly
/// </summary>
/// <example>
/// AssemblyInfoCalling assembly = new AssemblyInfoCalling();
/// string company1 = assembly.Company;
/// string product1 = assembly.Product;
/// string copyright1 = assembly.Copyright;
/// string trademark1 = assembly.Trademark;
/// string title1 = assembly.Title;
/// string description1 = assembly.Description;
/// string configuration1 = assembly.Configuration;
/// string fileversion1 = assembly.FileVersion;
/// Version version1 = assembly.Version;
/// string versionFull1 = assembly.VersionFull;
/// string versionMajor1 = assembly.VersionMajor;
/// string versionMinor1 = assembly.VersionMinor;
/// string versionBuild1 = assembly.VersionBuild;
/// string versionRevision1 = assembly.VersionRevision;
/// </example>
public class AssemblyInfoCalling
{
/// <summary>
/// Initializes a new instance of the <see cref="AssemblyInfoCalling"/> class.
/// </summary>
/// <param name="traceLevel">The trace level needed to get correct assembly
/// - will need to adjust based on where you put these classes in your project(s).</param>
public AssemblyInfoCalling(int traceLevel = 4)
{
//----------------------------------------------------------------------
// Default to "3" as the number of levels back in the stack trace to get the
// correct assembly for "calling" assembly
//----------------------------------------------------------------------
StackTraceLevel = traceLevel;
}
//----------------------------------------------------------------------
// Standard assembly attributes
//----------------------------------------------------------------------
public string Company { get { return GetCallingAssemblyAttribute<AssemblyCompanyAttribute>(a => a.Company); } }
public string Product { get { return GetCallingAssemblyAttribute<AssemblyProductAttribute>(a => a.Product); } }
public string Copyright { get { return GetCallingAssemblyAttribute<AssemblyCopyrightAttribute>(a => a.Copyright); } }
public string Trademark { get { return GetCallingAssemblyAttribute<AssemblyTrademarkAttribute>(a => a.Trademark); } }
public string Title { get { return GetCallingAssemblyAttribute<AssemblyTitleAttribute>(a => a.Title); } }
public string Description { get { return GetCallingAssemblyAttribute<AssemblyDescriptionAttribute>(a => a.Description); } }
public string Configuration { get { return GetCallingAssemblyAttribute<AssemblyDescriptionAttribute>(a => a.Description); } }
public string FileVersion { get { return GetCallingAssemblyAttribute<AssemblyFileVersionAttribute>(a => a.Version); } }
//----------------------------------------------------------------------
// Version attributes
//----------------------------------------------------------------------
public static Version Version
{
get
{
//----------------------------------------------------------------------
// Get the assembly, return empty if null
//----------------------------------------------------------------------
Assembly assembly = GetAssembly(StackTraceLevel);
return assembly == null ? new Version() : assembly.GetName().Version;
}
}
public string VersionFull { get { return Version.ToString(); } }
public string VersionMajor { get { return Version.Major.ToString(); } }
public string VersionMinor { get { return Version.Minor.ToString(); } }
public string VersionBuild { get { return Version.Build.ToString(); } }
public string VersionRevision { get { return Version.Revision.ToString(); } }
//----------------------------------------------------------------------
// Set how deep in the stack trace we're looking - allows for customized changes
//----------------------------------------------------------------------
public static int StackTraceLevel { get; set; }
//----------------------------------------------------------------------
// Custom Attributes
//----------------------------------------------------------------------
public string Location
{
get
{
try
{
return GetCallingAssemblyAttribute<AssemblyLocationAttribute>(a => a.Value);
}
catch (NullReferenceException)
{
return string.Empty;
}
}
}
/// <summary>
/// Gets the calling assembly attribute.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="value">The value.</param>
/// <example>return GetCallingAssemblyAttribute<AssemblyCompanyAttribute>(a => a.Company);</example>
/// <returns></returns>
private string GetCallingAssemblyAttribute<T>(Func<T, string> value) where T : Attribute
{
//----------------------------------------------------------------------
// Get the assembly, return empty if null
//----------------------------------------------------------------------
Assembly assembly = GetAssembly(StackTraceLevel);
if (assembly == null) return string.Empty;
//----------------------------------------------------------------------
// Get the attribute value
//----------------------------------------------------------------------
T attribute = (T) Attribute.GetCustomAttribute(assembly, typeof (T));
return value.Invoke(attribute);
}
/// <summary>
/// Go through the stack and gets the assembly
/// </summary>
/// <param name="stackTraceLevel">The stack trace level.</param>
/// <returns></returns>
private static Assembly GetAssembly(int stackTraceLevel)
{
//----------------------------------------------------------------------
// Get the stack frame, returning null if none
//----------------------------------------------------------------------
StackTrace stackTrace = new StackTrace();
StackFrame[] stackFrames = stackTrace.GetFrames();
if (stackFrames == null) return null;
//----------------------------------------------------------------------
// Get the declaring type from the associated stack frame, returning null if nonw
//----------------------------------------------------------------------
var declaringType = stackFrames[stackTraceLevel].GetMethod().DeclaringType;
if (declaringType == null) return null;
//----------------------------------------------------------------------
// Return the assembly
//----------------------------------------------------------------------
var assembly = declaringType.Assembly;
return assembly;
}
}
Came across this looking for something similar. In my case, it was Assembly.GetEntryAssembly()
.
Use Case
Program A runs CodeDomProvider.CompileAssemblyFromSource
to embed resources and compile Program B. DLL in Program B then reads resources, but doesn't know the Assembly (which the above solves).
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