CodeDomProvider.GenerateCodeFromMember Method
Definition
Important
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Generates code for the specified Code Document Object Model (CodeDOM) member declaration and sends it to the specified text writer, using the specified options.
public:
virtual void GenerateCodeFromMember(System::CodeDom::CodeTypeMember ^ member, System::IO::TextWriter ^ writer, System::CodeDom::Compiler::CodeGeneratorOptions ^ options);public virtual void GenerateCodeFromMember (System.CodeDom.CodeTypeMember member, System.IO.TextWriter writer, System.CodeDom.Compiler.CodeGeneratorOptions options);abstract member GenerateCodeFromMember : System.CodeDom.CodeTypeMember * System.IO.TextWriter * System.CodeDom.Compiler.CodeGeneratorOptions -> unit
override this.GenerateCodeFromMember : System.CodeDom.CodeTypeMember * System.IO.TextWriter * System.CodeDom.Compiler.CodeGeneratorOptions -> unitPublic Overridable Sub GenerateCodeFromMember (member As CodeTypeMember, writer As TextWriter, options As CodeGeneratorOptions)Parameters
- member
- CodeTypeMember
A CodeTypeMember object that indicates the member for which to generate code.
- writer
- TextWriter
The TextWriter to which output code is sent.
- options
- CodeGeneratorOptions
A CodeGeneratorOptions that indicates the options to use for generating code.
Exceptions
This method is not overridden in a derived class.
Examples
The following code example shows the use of the GenerateCodeFromMember method as implemented by the CSharpCodeProvider and VBCodeProvider classes.
using System;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.IO;
using System.Text.RegularExpressions;
namespace BasicCodeDomApp
{
class Program
{
static string providerName = "cs";
static string sourceFileName = "test.cs";
static CodeSnippetTypeMember snippetMethod;
static void Main(string[] args)
{
CodeDomProvider provider = CodeDomProvider.CreateProvider(providerName);
// Create a code snippet to be used in the graph.
GenCodeFromMember(provider, new CodeGeneratorOptions());
LogMessage("Building CodeDOM graph...");
CodeCompileUnit cu = new CodeCompileUnit();
cu = BuildClass1();
StringWriter sw = new StringWriter();
LogMessage("Generating code...");
provider.GenerateCodeFromCompileUnit(cu, sw, null);
string output = sw.ToString();
LogMessage("Dumping source...");
LogMessage(output);
LogMessage("Writing source to file...");
Stream s = File.Open(sourceFileName, FileMode.Create);
StreamWriter t = new StreamWriter(s);
t.Write(output);
t.Close();
s.Close();
CompilerParameters opt = new CompilerParameters(new string[]{
"System.dll" });
opt.GenerateExecutable = false;
opt.OutputAssembly = "Sample.dll";
CompilerResults results;
LogMessage("Compiling with " + providerName);
results = provider.CompileAssemblyFromFile(opt, sourceFileName);
OutputResults(results);
if (results.NativeCompilerReturnValue != 0)
{
LogMessage("");
LogMessage("Compilation failed.");
}
else
{
LogMessage("");
LogMessage("Demo completed successfully.");
}
File.Delete(sourceFileName);
}
// Build a library program graph using
// System.CodeDom types.
public static CodeCompileUnit BuildClass1()
{
// Create a new CodeCompileUnit to contain
// the program graph.
CodeCompileUnit compileUnit = new CodeCompileUnit();
// Declare a new namespace called Samples.
CodeNamespace samples = new CodeNamespace("Samples");
// Add the new namespace to the compile unit.
compileUnit.Namespaces.Add(samples);
// Add the new namespace import for the System namespace.
samples.Imports.Add(new CodeNamespaceImport("System"));
// Declare a new type called Class1.
CodeTypeDeclaration class1 = new CodeTypeDeclaration("Class1");
// Add the new type to the namespace type collection.
samples.Types.Add(class1);
class1.Members.Add(snippetMethod);
return compileUnit;
}
static void LogMessage(string text)
{
Console.WriteLine(text);
}
static void OutputResults(CompilerResults results)
{
LogMessage("NativeCompilerReturnValue=" +
results.NativeCompilerReturnValue.ToString());
foreach (string s in results.Output)
{
LogMessage(s);
}
}
static void GenCodeFromMember(CodeDomProvider provider, CodeGeneratorOptions options)
{
options.BracingStyle = "C";
CodeMemberMethod method1 = new CodeMemberMethod();
method1.Name = "ReturnString";
method1.Attributes = MemberAttributes.Public;
method1.ReturnType = new CodeTypeReference("System.String");
method1.Parameters.Add(new CodeParameterDeclarationExpression("System.String", "text"));
method1.Statements.Add(new CodeMethodReturnStatement(new CodeArgumentReferenceExpression("text")));
StringWriter sw = new StringWriter();
provider.GenerateCodeFromMember(method1, sw, options);
snippetMethod = new CodeSnippetTypeMember(sw.ToString());
}
}
}
Imports System.CodeDom
Imports System.CodeDom.Compiler
Imports System.IO
Imports System.Text.RegularExpressions
Class Program
Private Shared providerName As String = "vb"
Private Shared sourceFileName As String = "test.vb"
Private Shared snippetMethod As CodeSnippetTypeMember
Shared Sub Main(ByVal args() As String)
Dim provider As CodeDomProvider = CodeDomProvider.CreateProvider(providerName)
' Create a code snippet to be used in the graph.
GenCodeFromMember(provider, New CodeGeneratorOptions())
LogMessage("Building CodeDOM graph...")
Dim cu As New CodeCompileUnit()
cu = BuildClass1()
Dim sw As New StringWriter()
LogMessage("Generating code...")
provider.GenerateCodeFromCompileUnit(cu, sw, Nothing)
Dim output As String = sw.ToString()
LogMessage("Dumping source...")
LogMessage(output)
LogMessage("Writing source to file...")
Dim s As Stream = File.Open(sourceFileName, FileMode.Create)
Dim t As New StreamWriter(s)
t.Write(output)
t.Close()
s.Close()
Dim opt As New CompilerParameters(New String() {"System.dll"})
opt.GenerateExecutable = False
opt.OutputAssembly = "Sample.dll"
Dim results As CompilerResults
LogMessage(("Compiling with " + providerName))
results = provider.CompileAssemblyFromFile(opt, sourceFileName)
OutputResults(results)
If results.NativeCompilerReturnValue <> 0 Then
LogMessage("")
LogMessage("Compilation failed.")
Else
LogMessage("")
LogMessage("Demo completed successfully.")
End If
File.Delete(sourceFileName)
End Sub
' Build a library program graph using
' System.CodeDom types.
Public Shared Function BuildClass1() As CodeCompileUnit
' Create a new CodeCompileUnit to contain
' the program graph.
Dim compileUnit As New CodeCompileUnit()
' Declare a new namespace called Samples.
Dim samples As New CodeNamespace("Samples")
' Add the new namespace to the compile unit.
compileUnit.Namespaces.Add(samples)
' Add the new namespace import for the System namespace.
samples.Imports.Add(New CodeNamespaceImport("System"))
' Declare a new type called Class1.
Dim class1 As New CodeTypeDeclaration("Class1")
' Add the new type to the namespace type collection.
samples.Types.Add(class1)
class1.Members.Add(snippetMethod)
Return compileUnit
End Function 'BuildClass1
Shared Sub LogMessage(ByVal [text] As String)
Console.WriteLine([text])
End Sub
Shared Sub OutputResults(ByVal results As CompilerResults)
LogMessage(("NativeCompilerReturnValue=" + results.NativeCompilerReturnValue.ToString()))
Dim s As String
For Each s In results.Output
LogMessage(s)
Next s
End Sub
Shared Sub GenCodeFromMember(ByVal provider As CodeDomProvider, ByVal options As CodeGeneratorOptions)
options.BracingStyle = "C"
Dim method1 As New CodeMemberMethod()
method1.Name = "ReturnString"
method1.Attributes = MemberAttributes.Public
method1.ReturnType = New CodeTypeReference("System.String")
method1.Parameters.Add(New CodeParameterDeclarationExpression("System.String", "text"))
method1.Statements.Add(New CodeMethodReturnStatement(New CodeArgumentReferenceExpression("text")))
Dim sw As New StringWriter()
provider.GenerateCodeFromMember(method1, sw, options)
snippetMethod = New CodeSnippetTypeMember(sw.ToString())
End Sub
End Class
Remarks
The base class implementation throws a NotImplementedException. See CSharpCodeProvider.GenerateCodeFromMember for documentation describing an implementation of this method.
Applies to
See also
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