markdown
# 需求描述
因為要做重構，需要找出有哪些邏輯是藏在DTO裡面的，
但DTO類別檔又很多，不想一個個找
所以就想寫個console程式來撈
# 做法
首先把要撈的DLL跟他相依的DLL都複製到要執行的排程執行檔輸出資料夾(通常是bin\debug)
以下程式碼:
```
public class Worker
{
public void DoWork()
{
System.Reflection.Assembly service = Assembly.LoadFile(@"<你要找的namespace所在的dll的絕對路徑>.dll");
Type[] typelist = service.GetTypes();
var nameHaveDtoTypes = typelist.Where(x => x.Name.ToUpper().EndsWith("DTO"));//你的類別名稱的特徵，例如找DTO就結尾是DTO
foreach (var typeitem in nameHaveDtoTypes)
{
if(typeitem.GetProperties().Any(prop=> !MightBeCouldBeMaybeAutoGeneratedInstanceProperty(prop)))
{
foreach (var prop in typeitem.GetProperties().Where(prop => !MightBeCouldBeMaybeAutoGeneratedInstanceProperty(prop)))
{
//印到畫面跟輸出視窗
Console.WriteLine($"{typeitem.Name},{prop.Name}");
System.Diagnostics.Debug.WriteLine($"{typeitem.Name},{prop.Name}");
}
}
}
}
public bool MightBeCouldBeMaybeAutoGeneratedInstanceProperty(PropertyInfo info)
{
bool mightBe = info.GetGetMethod()
.GetCustomAttributes(
typeof(CompilerGeneratedAttribute),
true
)
.Any();
if (!mightBe)
{
return false;
}
bool maybe = info.DeclaringType
.GetFields(BindingFlags.NonPublic | BindingFlags.Instance)
.Where(f => f.Name.Contains(info.Name))
.Where(f => f.Name.Contains("BackingField"))
.Where(
f => f.GetCustomAttributes(
typeof(CompilerGeneratedAttribute),
true
).Any()
)
.Any();
return maybe;
}
}
```
參考:
1.LINE群大神指點關鍵字**CompilerGeneratedAttribute**
這個是指在編譯成DLL時，單純getter setter的屬性上面會有這個tag
https://msdn.microsoft.com/en-us/library/system.runtime.compilerservices.compilergeneratedattribute.aspx
2.How to find out if a property is an auto-implemented property with reflection?
https://stackoverflow.com/questions/2210309/how-to-find-out-if-a-property-is-an-auto-implemented-property-with-reflection?lq=1
