我在编译 VB 代码时遇到了 CodeDom 问题。我收到一条消息,说“在 Imports 'System.Core' 中指定的命名空间或类型不包含任何公共成员或找不到。”。对于应该编译的代码中的每个 Imports,都会重复此操作。
编译器库:
Public Class Script
Private code As String
Private results As CompilerResults
Private compiled = False
Private engine = 1
Sub setCode(ByVal code As String)
Me.code = code
compiled = False
End Sub
Sub setCompiler(ByVal cid As Integer)
If cid > 2 Or cid < 1 Then
MsgBox("Invalid compiler ID given. Script being ignored...")
Else
engine = cid
End If
End Sub
Sub compile()
'Dim codeProvider As Object
Dim codeProvider As New VBCodeProvider()
'If engine = 1 Then
'codeProvider = New CSharpCodeProvider()
'Me.code = My.Resources.corecs.ToString() + Me.code
'ElseIf engine = 2 Then
'codeProvider = New VBCodeProvider()
'Me.code = My.Resources.corevb.ToString() + Me.code
' End If
Dim params As New CompilerParameters()
params.GenerateInMemory = True
params.TreatWarningsAsErrors = False
params.WarningLevel = 4
Dim refs() As String = {"System.dll", "Microsoft.VisualBasic.dll"}
params.ReferencedAssemblies.AddRange(refs)
results = codeProvider.CompileAssemblyFromSource(params, Me.code)
If results.Errors.Count > 0 Then
MsgBox("Compiler error...")
For Each errmsg As CompilerError In results.Errors
MsgBox(errmsg.ErrorText)
Next
compiled = False
Else
compiled = True
End If
End Sub
Sub runCode(ByVal entrypoint As String)
Dim mAssembly As System.Reflection.Assembly
If results.Errors.Count = 0 Then
mAssembly = results.CompiledAssembly
Else
Exit Sub
End If
Dim scriptType As Type
Dim rslt As Object
Try
scriptType = mAssembly.GetType("Script")
rslt = scriptType.InvokeMember(entrypoint, System.Reflection.BindingFlags.InvokeMethod Or System.Reflection.BindingFlags.Public Or System.Reflection.BindingFlags.Static, Nothing, Nothing, Nothing)
Catch ex As Exception
MsgBox(ex)
End Try
End Sub
End Class
应该编译的代码:
Imports System
Imports System.Core
Imports System.Data
Imports System.Data.DataSetExtensions
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Xml
Imports System.Xml.Linq
Public Class Script
Public Shared Sub Main()
MessageBox.Show("Hello")
End Sub
End Class
我将 90% 的内容基于http://www.codeproject.com/Articles/5472/Compiling-NET-code-on-the-fly