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LCIDConversionAttribute Class

Indicates that a method's unmanaged signature expects a locale identifier (LCID) parameter.

Namespace: System.Runtime.InteropServices
Assembly: mscorlib (in mscorlib.dll)

[ComVisibleAttribute(true)] 
[AttributeUsageAttribute(AttributeTargets.Method, Inherited=false)] 
public sealed class LCIDConversionAttribute : Attribute
/** @attribute ComVisibleAttribute(true) */ 
/** @attribute AttributeUsageAttribute(AttributeTargets.Method, Inherited=false) */ 
public final class LCIDConversionAttribute extends Attribute
ComVisibleAttribute(true) 
AttributeUsageAttribute(AttributeTargets.Method, Inherited=false) 
public final class LCIDConversionAttribute extends Attribute

You can apply this attribute to methods.

This attribute indicates that the marshaler should expect an LCID to be passed after the designated method argument. When calls are made from managed to unmanaged code, the marshaler supplies the LCID argument automatically.

The following example demonstrates different signature translations based on different values supplied to LCIDConversionAttribute.

using System;
using System.Runtime.InteropServices;
using System.Reflection;

class LCIDAttrSample
{
    private const int LCID_INSTALLED = 1;
    private const int LCID_SUPPORTED = 2;

    [DllImport("KERNEL32.DLL", EntryPoint="IsValidLocale", SetLastError = true, CharSet = CharSet.Auto)]
    [LCIDConversionAttribute(0)] // Position of the LCID argument
    public static extern bool IsValidLocale(
                                                uint dwFlags            // options
                                            );

    public void CheckCurrentLCID()
    {
        MethodInfo mthIfo = this.GetType().GetMethod("IsValidLocale");
        Attribute attr = Attribute.GetCustomAttribute(mthIfo,typeof(LCIDConversionAttribute));

        if( attr != null)
        {
            LCIDConversionAttribute lcidAttr = (LCIDConversionAttribute)attr;
            Console.WriteLine("Position of the LCID argument in the unmanaged signature: " + lcidAttr.Value.ToString());
        }

        bool res = IsValidLocale(LCID_INSTALLED);
        Console.WriteLine("Result LCID_INSTALLED " + res.ToString());
        res = IsValidLocale(LCID_SUPPORTED);
        Console.WriteLine("Result LCID_SUPPORTED " + res.ToString());
    }

    static void Main(string[] args)
    {
        LCIDAttrSample smpl = new LCIDAttrSample();
        smpl.CheckCurrentLCID();
    }
}


import System.*;
import System.Runtime.InteropServices.*;
import System.Reflection.*;

class LCIDAttrSample
{
    private static final int LCID_INSTALLED = 1;
    private static final int LCID_SUPPORTED = 2;
    
    /** @attribute DllImport("KERNEL32.DLL", EntryPoint = "IsValidLocale",
        SetLastError = true, CharSet = CharSet.Auto) 
     */
    /** @attribute LCIDConversionAttribute(0)
     */
    
    public static native boolean IsValidLocale(int dwFlags);

    // Position of the LCID argument options
    public void CheckCurrentLCID()
    {
        MethodInfo mthIfo = this.GetType().GetMethod("IsValidLocale");
        Attribute attr = Attribute.GetCustomAttribute(mthIfo,
            LCIDConversionAttribute.class.ToType());
        if (attr != null) {
            LCIDConversionAttribute lcidAttr = (LCIDConversionAttribute)attr;
            Console.WriteLine("Position of the LCID argument in the unmanaged "
                + "signature: " 
                + System.Convert.ToString(lcidAttr.get_Value()));
        }

        boolean res = IsValidLocale(LCID_INSTALLED);
        Console.WriteLine("Result LCID_INSTALLED " 
            + System.Convert.ToString(res));
        res = IsValidLocale(LCID_SUPPORTED);
        Console.WriteLine("Result LCID_SUPPORTED " 
            + System.Convert.ToString(res));
    } //CheckCurrentLCID

    public static void main(String[] args)
    {
        LCIDAttrSample smpl = new LCIDAttrSample();
        smpl.CheckCurrentLCID();
    } //main
} //LCIDAttrSample

System.Object
   System.Attribute
    System.Runtime.InteropServices.LCIDConversionAttribute

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0

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