IVsDataProviderObjectFactory.GetAssembly Method

Artikel
02/28/2011

Resolves a provider-specific assembly string to its corresponding Assembly representation.

Namespace: Microsoft.VisualStudio.Data.Core
Assembly: Microsoft.VisualStudio.Data.Core (in Microsoft.VisualStudio.Data.Core.dll)

Syntax

'Declaration
Function GetAssembly ( _
    assemblyString As String _
) As Assembly

Assembly GetAssembly(
    string assemblyString
)

Assembly^ GetAssembly(
    String^ assemblyString
)

abstract GetAssembly : 
        assemblyString:string -> Assembly

function GetAssembly(
    assemblyString : String
) : Assembly

Parameters

assemblyString
Type: System.String
A provider-specific assembly string.

Return Value

Type: System.Reflection.Assembly
An Assembly object representing the assembly resolved from the specified assembly string, if found; otherwise, nulla null reference (Nothing in Visual Basic).

Exceptions

Exception	Condition
ArgumentNullException	The assemblyString parameter is nulla null reference (Nothing in Visual Basic).

Remarks

A provider implements this method when there are assembly names specified as strings in formats such as a data support XML file, and these assembly names cannot be automatically resolved (or would be resolved incorrectly) by the CLR’s Load method. One use of this method would be to expand an incomplete assembly declaration. (For example, if the string is "MyAssembly", it might get expanded to "MyAssembly, Version=2.0.0.0, Culture=neutral, PublicKeyToken=1234567890ABCDEF" before the CLR resolves it.)

This method is provided to shorten a provider’s specification of type names, which can help reduce duplication of a commonly used assembly throughout the code base.

Examples

The following code demonstrates how to implement this method to return the assembly in which the provider object factory is contained if the assembly string is empty. The example inherits from the framework DataProviderObjectFactory class, which provides a default implementation of the GetType and GetAssembly methods.

using System;
using System.Reflection;
using Microsoft.VisualStudio.Data.Core;
using Microsoft.VisualStudio.Data.Framework;

public class MyProviderObjectFactory2 : DataProviderObjectFactory
{
    public override object CreateObject(Type objType)
    {
        return null;
    }

    public override Assembly GetAssembly(string assemblyString)
    {
        if (assemblyString == null)
        {
            throw new ArgumentNullException("assemblyString");
        }
        if (assemblyString.Length == 0)
        {
            return GetType().Assembly;
        }
        return base.GetAssembly(assemblyString);
    }
}

.NET Framework Security

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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