How does VB. NET obtain the method name and class name for calling the current process?

　　This tutorial introducesVB. NETHow to getCall the current processMethod Name and class name.

This article describes how VB. NET (VB 2008, VB 2005) obtains the names of the Calling methods and classes that call the current process.

Mainly usedSystem. Diagnostics. StackTraceAndSystem. Diagnostics. StackFrame, AndStackFrameMethod:GetFileName,GetFileLineNumber,GetMethod. Name,GetMethod. ReflectedType. Name.

Sample Code

As shown in the following sample code, we have two classes: Class1 and Class2. Class1 has a method called LoadXmlFile to call the WriteToFile method of Class2.

Imports System.XmlPublic Class Class1    Public Sub LoadXmlFile()        Dim filePath As String = "C:a.xml"
　　        Dim xdoc As New Xml.XmlDocument        Try
　　            xdoc.Load(filePath)
　　        Catch ex As Exception
　　            Dim log As New Class2
　　            log.WriteToFile("Error. Load XML File failed")
　　        End Try    End SubEnd Class

Imports System.DiagnosticsPublic Class Class2    Public Sub WriteToFile(ByVal Log As String)          Dim clsName As String = ""
　　        Dim mtdName As String = ""
　　        Dim lnNo As String = ""
　　        Dim codeFilePath As String = ""        Dim st As New StackTrace(True)
　　        If st.FrameCount > 1 Then
　　            Dim sf As StackFrame = st.GetFrame(1)
　　            mtdName = sf.GetMethod.Name
　　            Debug.WriteLine(mtdName)            clsName = sf.GetMethod.ReflectedType.Name
　　            Debug.WriteLine(clsName)            lnNo = sf.GetFileLineNumber.ToString
　　            Debug.WriteLine(lnNo)            codeFilePath = sf.GetFileName
　　            Debug.WriteLine(codeFilePath)
　　        End If    End SubEnd Class

In Class2, we wrote some code to get the name of the Class1 that calls it, the file path, the name of the calling method, and the number of lines that execute the call in the calling file.

Key Points

1. Imports System. Diagnostics.

2. StackTrace (System. Diagnostics. StackTrace) and StackFrame (System. Diagnostics. StackFrame) are used ).

3. StackTrace. GetFrame (1) is used ).

4. StackFrame. GetMethod. Name to obtain the method (calling method name) for calling the current process ).

5. StackFrame. GetMethod. ReflectedType. Name to get the name of the class calling the current process (calling class Name ).

6. StackFrame. GetFileLineNumber. ToString to get the number of lines of statements calling the current process in the file.

7. StackFrame. GetFileName to obtain the file path of the current call process.