IAppHostProperty::SetMetadata Method

Sets metadata for the current property.

Syntax

HRESULT SetMetadata(  
   [in,  
   string] BSTR bstrMetadataType,  
   [in] VARIANT value  
);  

Parameters

bstrMetadataType
A BSTR that contains the name of the metadata being requested.

value
A VARIANT that contains the new metadata.

Return Value

An HRESULT. Possible values include, but are not limited to, those in the following table.

Example

The following code example sets the configSource attribute for the system.applicationHost/sites configuration section by using the SetMetadata method.

#pragma once

#include <stdio.h>
#include <string.h>
#include <ahadmin.h>

int main()
{
    IAppHostWritableAdminManager *    pWMgr       = NULL;
    IAppHostElement              *    pElement    = NULL;
    
    HRESULT  hr                   = S_OK;
    BSTR     bstrConfigCommitPath = SysAllocString(L"MACHINE/WEBROOT/APPHOST");
    BSTR     bstrSectionName      = SysAllocString(L"system.applicationHost/sites");
    BSTR     bstrConfigSource     = SysAllocString(L"sites.config");
    BSTR     bstrConfigSourceAttr = SysAllocString(L"configSource");
    VARIANT  vtConfigSource;
    vtConfigSource.vt             = VT_BSTR;
    vtConfigSource.bstrVal        = bstrConfigSource;

    // Initialize
    hr = CoInitializeEx( NULL, COINIT_MULTITHREADED );
    if ( FAILED( hr ) )
    {
        printf_s( "ERROR: Unable to initialize\n" );
        goto exit;
    } 

    // Create
    hr = CoCreateInstance( __uuidof( AppHostWritableAdminManager ), NULL, 
            CLSCTX_INPROC_SERVER,
            __uuidof( IAppHostWritableAdminManager ), (void**) &pWMgr );
    if( FAILED( hr ) )
    {
        printf_s( "ERROR: Unable to create an IAppHostWritableAdminManager instance\n" );
        goto exit;
    }

    // Set the commit path
    hr = pWMgr->put_CommitPath( bstrConfigCommitPath );
    if ( FAILED( hr ) )
    {
        printf_s( "ERROR: Unable to set the configuration path" );
        goto exit;
    }

    // Get the admin section
    hr = pWMgr->GetAdminSection( bstrSectionName, bstrConfigCommitPath, &pElement );
    if ( FAILED( hr ) || ( &pElement == NULL ) )
    {
        if ( E_ACCESSDENIED == hr )
        {
            printf_s( "ERROR: Access to configuration denied.\n" );
            printf_s( "       Run sample as an administrator.\n" );
        }
        else
        {
            printf_s( "ERROR: Unable to get asp configuration section.\n" );
        }
        goto exit;
    }
        
    // Set the metadata
    hr = pElement->SetMetadata( bstrConfigSourceAttr, vtConfigSource );
    if ( FAILED( hr ) )
    {
        printf_s( "ERROR: Unable to set metadata\n" );
        goto exit;
    }

    pWMgr->CommitChanges();
exit:
    // Exiting / Unwinding
    if ( pElement != NULL )
    {
        pElement -> Release ();
        pElement = NULL;
    }

    if ( pWMgr != NULL )
    {
        pWMgr->Release(); 
        pWMgr = NULL;
    }

    SysFreeString( bstrConfigCommitPath );
    SysFreeString( bstrSectionName );
    SysFreeString( bstrConfigSource );
    SysFreeString( bstrConfigSourceAttr );


    // Uninitialize
    CoUninitialize();

    return 0;
};

Requirements

See Also

IAppHostProperty Interface