I used the following answers to test compile code:
https://stackoverflow.com/a/21382083/9942758
https://stackoverflow.com/a/14711110/9942758
Here is my code:
Public Interface IScript
Property theDataTable As System.Data.DataTable
Sub DoWork()
End Interface
Public Function GenerateScript(code As String) As IScript
Using provider As New VBCodeProvider()
Dim parameters As New CompilerParameters()
parameters.GenerateInMemory = True
parameters.ReferencedAssemblies.Add(Assembly.GetExecutingAssembly().Location)
parameters.ReferencedAssemblies.Add("System.Data.dll")
parameters.ReferencedAssemblies.Add("System.Xml.dll")
parameters.ReferencedAssemblies.Add("C:\Users\<User>\source\repos\MikroTikTable\MikroTikTable\bin\Debug\Renci.SshNet.dll")
Dim interfaceNamespace As String = GetType(IScript).Namespace
Dim codeArray() As String = New String() {"Imports " & interfaceNamespace & Environment.NewLine & code}
Dim results As CompilerResults = provider.CompileAssemblyFromSource(parameters, codeArray)
If results.Errors.HasErrors Then
Throw New Exception("Failed to compile script")
Else
Return CType(results.CompiledAssembly.CreateInstance("Script"), IScript)
End If
End Using
End Function
Public Function GetTable(theHost As String, theUser As String, thePwd As String, theCmd As String) As DataTable
Dim builder As New StringBuilder()
builder.AppendLine("Imports Renci.SshNet")
builder.AppendLine("Imports System.Data")
builder.AppendLine("Imports Microsoft.VisualBasic")
builder.AppendLine("Imports System.Text")
builder.AppendLine("Imports System.Text.RegularExpressions")
'builder.AppendLine("Public Interface IScript")
'builder.AppendLine(" Property theDataTable As DataTable")
'builder.AppendLine(" Sub DoWork()")
'builder.AppendLine("End Interface")
builder.AppendLine("Public Class Script")
builder.AppendLine(" Implements IScript")
builder.AppendLine(" Public Property theDataTable As DataTable Implements IScript.theDataTable")
builder.AppendLine(" Public Sub DoWork() Implements IScript.DoWork")
builder.AppendLine($" Dim theConnectionInfo As PasswordConnectionInfo = New PasswordConnectionInfo(""{theHost}"", ""{theUser}"", ""{thePwd}"")")
builder.AppendLine(" Dim sshClient = New SshClient(theConnectionInfo)")
builder.AppendLine($" Dim sshCmd = ""{theCmd}"".Replace(vbCrLf, vbCr)")
builder.AppendLine(" Dim cmdArgs As New clsCommandData With {.cmd = sshCmd}")
builder.AppendLine(" sshClient.Connect()")
builder.AppendLine(" cmdArgs.output = sshClient.RunCommand(cmdArgs.cmd)")
builder.AppendLine(" Dim resultText = cmdArgs.output.Result.Replace(vbCr, """")")
builder.AppendLine(" SshClient.Disconnect()")
builder.AppendLine(" resultText = resultText.Replace(vbLf, vbCrLf)")
builder.AppendLine(" resultText = Regex.Replace(resultText, ""^\s+$[\r\n]*"", ""|"", RegexOptions.Multiline)")
builder.AppendLine(" Dim interfaceRows() = resultText.Split(""|"")")
builder.AppendLine(" Dim newString As New StringBuilder")
builder.AppendLine(" For i As Integer = 0 To interfaceRows.Length - 2")
builder.AppendLine(" Dim interfaceRow = interfaceRows(i)")
builder.AppendLine(" interfaceRow = interfaceRow.Replace(""|"", """")")
builder.AppendLine(" interfaceRow = Trim(interfaceRow)")
builder.AppendLine(" interfaceRow = interfaceRow.Replace(vbCrLf, "" "")")
builder.AppendLine(" interfaceRow = Regex.Replace(interfaceRow, "" {2,}"", "" "")")
builder.AppendLine(" Dim startPos = interfaceRow.LastIndexOf(""="")")
builder.AppendLine(" Do While startPos > -1")
builder.AppendLine(" Dim theSpacePos = interfaceRow.LastIndexOf("" "", startPos)")
builder.AppendLine(" If theSpacePos > -1 Then interfaceRow = interfaceRow.Remove(theSpacePos, 1).Insert(theSpacePos, ""|"")")
builder.AppendLine(" startPos = interfaceRow.LastIndexOf(""="", theSpacePos)")
builder.AppendLine(" Loop")
builder.AppendLine(" Dim fieldCandidates() = interfaceRow.Split(""|"")")
builder.AppendLine(" For j As Integer = 1 To fieldCandidates.Length - 1")
builder.AppendLine(" Dim fieldCandidate = fieldCandidates(j)")
builder.AppendLine(" Dim splitField() = fieldCandidate.Split(""="")")
builder.AppendLine(" If Not theDataTable.Columns.Contains(splitField(0)) Then theDataTable.Columns.Add(splitField(0), GetType(String))")
builder.AppendLine(" Next")
builder.AppendLine(" Dim addRow = theDataTable.NewRow")
builder.AppendLine(" For j As Integer = 1 To fieldCandidates.Length - 1")
builder.AppendLine(" Dim fieldCandidate = fieldCandidates(j)")
builder.AppendLine(" Dim splitField() = fieldCandidate.Split(""="")")
builder.AppendLine(" addRow(splitField(0)) = splitField(1)")
builder.AppendLine(" Next")
builder.AppendLine(" theDataTable.Rows.Add(addRow)")
builder.AppendLine(" Next")
builder.AppendLine(" End Sub")
builder.AppendLine(" Private Class clsCommandData")
builder.AppendLine(" Public cmd As String")
builder.AppendLine(" Public output As SshCommand")
builder.AppendLine(" End Class")
builder.AppendLine("End Class")
'Dim theText = builder.ToString()
Dim script As IScript = GenerateScript(builder.ToString())
script.DoWork()
Return script.theDataTable
End Function
I keep on getting compiler error "Type 'IScript' is not defined"
If I explicitly define the IScript Interface in my stringbuilder I get no compiler error, but then casting from "Class Script" to IScript fails.
What am I missing here?
Start from here, which works, and add back what I removed. Basically, this code sees the Interface, so there must be some other issue.
Imports System.CodeDom.Compiler
Imports System.Reflection
Module Module1
Sub Main()
Dim bar = New Foo()
Dim dt = bar.GetTable()
End Sub
End Module
Public Interface IScript
Property theDataTable As System.Data.DataTable
Sub DoWork()
End Interface
Public Class Foo
Public Function GenerateScript(code As String) As IScript
Using provider As New VBCodeProvider()
Dim parameters As New CompilerParameters()
parameters.GenerateInMemory = True
parameters.ReferencedAssemblies.Add(Assembly.GetExecutingAssembly().Location)
parameters.ReferencedAssemblies.Add("System.Data.dll")
parameters.ReferencedAssemblies.Add("System.Xml.dll")
Dim interfaceNamespace As String = GetType(IScript).Namespace
Dim codeArray() As String = New String() {"Imports " & interfaceNamespace & Environment.NewLine & code}
Dim results As CompilerResults = provider.CompileAssemblyFromSource(parameters, codeArray)
If results.Errors.HasErrors Then
Throw New Exception("Failed to compile script")
Else
Return CType(results.CompiledAssembly.CreateInstance("Script"), IScript)
End If
End Using
End Function
Public Function GetTable() As DataTable
Dim text = "
Imports System.Data
Imports Microsoft.VisualBasic
Public Class Script
Implements IScript
Public Property theDataTable As DataTable Implements IScript.theDataTable
Public Sub DoWork() Implements IScript.DoWork
MsgBox(""Hello"")
End Sub
End Class"
Dim script As IScript = GenerateScript(text)
script.DoWork()
Return script.theDataTable
End Function
End Class