IVsSingleFileGenerator.Generate Method

Article
04/22/2008

Executes the transformation and returns the newly generated output file, whenever a custom tool is loaded, or the input file is saved.

Namespace: Microsoft.VisualStudio.Shell.Interop
Assembly: Microsoft.VisualStudio.Shell.Interop (in Microsoft.VisualStudio.Shell.Interop.dll)

Syntax

'Déclaration
Function Generate ( _
    wszInputFilePath As String, _
    bstrInputFileContents As String, _
    wszDefaultNamespace As String, _
    <OutAttribute> rgbOutputFileContents As IntPtr(), _
    <OutAttribute> ByRef pcbOutput As UInteger, _
    pGenerateProgress As IVsGeneratorProgress _
) As Integer
'Utilisation
Dim instance As IVsSingleFileGenerator
Dim wszInputFilePath As String
Dim bstrInputFileContents As String
Dim wszDefaultNamespace As String
Dim rgbOutputFileContents As IntPtr()
Dim pcbOutput As UInteger
Dim pGenerateProgress As IVsGeneratorProgress
Dim returnValue As Integer

returnValue = instance.Generate(wszInputFilePath, _
    bstrInputFileContents, wszDefaultNamespace, _
    rgbOutputFileContents, pcbOutput, _
    pGenerateProgress)

int Generate(
    string wszInputFilePath,
    string bstrInputFileContents,
    string wszDefaultNamespace,
    IntPtr[] rgbOutputFileContents,
    out uint pcbOutput,
    IVsGeneratorProgress pGenerateProgress
)

int Generate(
    [InAttribute] String^ wszInputFilePath, 
    [InAttribute] String^ bstrInputFileContents, 
    [InAttribute] String^ wszDefaultNamespace, 
    [OutAttribute] array<IntPtr>^ rgbOutputFileContents, 
    [OutAttribute] unsigned int% pcbOutput, 
    [InAttribute] IVsGeneratorProgress^ pGenerateProgress
)

function Generate(
    wszInputFilePath : String, 
    bstrInputFileContents : String, 
    wszDefaultNamespace : String, 
    rgbOutputFileContents : IntPtr[], 
    pcbOutput : uint, 
    pGenerateProgress : IVsGeneratorProgress
) : int

Parameters

wszInputFilePath
Type: System.String

[in] The full path of the input file. May be nulla null reference (Nothing in Visual Basic) in future releases of Visual Studio, so generators should not rely on this value.

bstrInputFileContents
Type: System.String

[in] The contents of the input file. This is either a UNICODE BSTR (if the input file is text) or a binary BSTR (if the input file is binary). If the input file is a text file, the project system automatically converts the BSTR to UNICODE.

wszDefaultNamespace
Type: System.String

[in] This parameter is meaningful only for custom tools that generate code. It represents the namespace into which the generated code will be placed. If the parameter is not nulla null reference (Nothing in Visual Basic) and not empty, the custom tool can use the following syntax to enclose the generated code.

' Visual Basic Namespace [default namespace]

... End Namespace

// Visual C#

namespace [default namespace] { ... }

rgbOutputFileContents
Type: array<System.IntPtr[]

[out] Returns an array of bytes to be written to the generated file. You must include UNICODE or UTF-8 signature bytes in the returned byte array, as this is a raw stream. The memory for rgbOutputFileContents must be allocated using the .NET Framework call, System.Runtime.InteropServices.AllocCoTaskMem, or the equivalent Win32 system call, CoTaskMemAlloc. The project system is responsible for freeing this memory.

pcbOutput
Type: System.UInt32%

[out] Returns the count of bytes in the rgbOutputFileContent array.

pGenerateProgress
Type: Microsoft.VisualStudio.Shell.Interop.IVsGeneratorProgress

[in] A reference to the IVsGeneratorProgress interface through which the generator can report its progress to the project system.

Return Value

Type: System.Int32

If the method succeeds, it returns S_OK. If it fails, it returns an error code.

Remarks

COM Signature

From vsshell.idl:

HRESULT IVsSingleFileGenerator::Generate(
   [in] LPCOLESTR wszInputFilePath,
   [in] BSTR bstrInputFileContents,
   [in] LPCOLESTR wszDefaultNamespace,
   [out] BYTE** rgbOutputFileContents,
   [out] ULONG* pcbOutput,
   [in] IVsGeneratorProgress* pGenerateProgress
);

For performance reasons, the project system reuses a single instantiation of a custom tool to handle multiple file transformations. Therefore, a custom tool should be designed to handle multiple calls to Generate during its lifetime.

The project system interprets the return value of Generate independently of errors reported through IVsGeneratorProgress. That is, if errors are reported through IVsGeneratorProgress, this method must still return FAILED for the overall generation process to fail.

Permissions

Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

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