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DatabaseProvider.VerifyDependencies Method

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Verifies the database dependencies for your provider.

Namespace: Microsoft.Web.Management.DatabaseManager
Assembly: Microsoft.Web.Management.DatabaseManager (in Microsoft.Web.Management.DatabaseManager.dll)

Syntax

'Declaration
Public Overridable Sub VerifyDependencies
'Usage
Dim instance As DatabaseProvider

instance.VerifyDependencies()

public virtual void VerifyDependencies()

public:
virtual void VerifyDependencies()

public function VerifyDependencies()

Remarks

You can optionally implement the VerifyDependencies method to verify any dependencies that your database provider may have. This method takes no parameters and does not have a return value; your database provider should raise an exception by using the DependenciesMissingException class if the operating system environment does not meet your database provider's dependencies.

Examples

The following code sample illustrates an example VerifyDependencies method that verifies the dependencies for a sample OLEDB provider.


    ' Verify the database provider dependencies.
    Public Overrides Sub VerifyDependencies()

        Try
            ' Create a database provider factory for OLEDB.
            Dim oledbFactory As DbProviderFactory = _
                DbProviderFactories.GetFactory("System.Data.OleDb")
            ' Test for null.
            If (Not (oledbFactory) Is Nothing) Then
                ' Create an assembly name class.
                Dim name As AssemblyName = _
                    New AssemblyName(oledbFactory.GetType.Assembly.FullName)
                ' Test the version to make sure that it's greater than 1.
                If (name.Version.Major < 1) Then
                    ' Raise an exception if the version is not sufficient.
                    Throw New DependenciesMissingException("http://www.iis.net/")
                End If
            End If
        Catch
            ' Throw an exception when an error occurs.
            Throw New DependenciesMissingException("http://www.iis.net/")
        End Try

    End Sub



        // Verify the database provider dependencies.
        public override void VerifyDependencies()
        {
            try
            {
                // Create a database provider factory for OLEDB.
                DbProviderFactory oledbFactory = DbProviderFactories.GetFactory("System.Data.OleDb");
                // Test for null.
                if (oledbFactory != null)
                {
                    // Create an assembly name class.
                    AssemblyName name = new AssemblyName(oledbFactory.GetType().Assembly.FullName);
                    // Test the version to make sure that it's greater than 1.
                    if (name.Version.Major < 1)
                    {
                        // Raise an exception if the version is not sufficient.
                        throw new DependenciesMissingException("http://www.iis.net/");
                    }
                }
            }
            catch
            {
                // Throw an exception when an error occurs.
                throw new DependenciesMissingException("http://www.iis.net/");
            }
        }

Permissions

See Also

Reference

DatabaseProvider Class

Microsoft.Web.Management.DatabaseManager Namespace