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FieldInfo.GetFieldFromHandle Method (RuntimeFieldHandle)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Gets a FieldInfo for the field represented by the specified handle.

Namespace:  System.Reflection
Assembly:  mscorlib (in mscorlib.dll)

Syntax

'Declaration
Public Shared Function GetFieldFromHandle ( _
    handle As RuntimeFieldHandle _
) As FieldInfo

public static FieldInfo GetFieldFromHandle(
    RuntimeFieldHandle handle
)

Parameters

  • handle
    Type: System.RuntimeFieldHandle
    A structure that contains the handle to the internal metadata representation of a field.

Return Value

Type: System.Reflection.FieldInfo
The field that is specified by handle.

Exceptions

Exception Condition
ArgumentException

handle is invalid.
MethodAccessException

The member is invoked late-bound through mechanisms such as Type.InvokeMember.

Remarks

Handles are valid only in the application ___domain in which they were obtained.

Examples

The following example uses the Type.GetFields method to get FieldInfo objects for the fields of a type, gets a RuntimeFieldHandle structure for each field, and then retrieves the FieldInfo objects from the handles using this overload of the GetFieldFromHandle method.

NoteNote:

To run this example, see Building Examples That Use a Demo Method and a TextBlock Control.

 
Imports System.Reflection

Public Class Example
   Public x As String
   Public y As Char
   Public a As Single
   Public b As Integer

   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      ' Get the type of the Example class.
      Dim myType As Type = GetType(Example)
      ' Get the fields of the Example class.
      Dim myFieldInfoArray As FieldInfo() = myType.GetFields()
      outputBlock.Text &= ControlChars.NewLine & _
         "The field information of the declared" & _
         " fields x, y, a, and b is:" & ControlChars.NewLine & vbCrLf
      Dim myRuntimeFieldHandle As RuntimeFieldHandle
      Dim i As Integer
      For i = 0 To myFieldInfoArray.Length - 1
         ' Get the RuntimeFieldHandle of myFieldInfoArray.
         myRuntimeFieldHandle = myFieldInfoArray(i).FieldHandle
         ' Call the GetFieldFromHandle method. 
         Dim myFieldInfo As FieldInfo = FieldInfo.GetFieldFromHandle(myRuntimeFieldHandle)
         ' Display the FieldInfo of myFieldInfo.
         outputBlock.Text &= String.Format("{0}", myFieldInfo) & vbCrLf
      Next i
   End Sub 'Main
End Class 'FieldInfo_GetFieldFromHandle

using System;
using System.Reflection;

public class Example
{
   public string x;
   public char y;
   public float a;
   public int b;

   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      // Get the type of the Example class.
      Type myType = typeof(Example);
      // Get the fields of the Example class.
      FieldInfo[] myFieldInfoArray = myType.GetFields();
      outputBlock.Text += "\nThe field information of the declared" +
          " fields x, y, a, and b is:\n" + "\n";
      RuntimeFieldHandle myRuntimeFieldHandle;
      for (int i = 0; i < myFieldInfoArray.Length; i++)
      {
         // Get the RuntimeFieldHandle of myFieldInfoArray.
         myRuntimeFieldHandle = myFieldInfoArray[i].FieldHandle;
         // Call the GetFieldFromHandle method. 
         FieldInfo myFieldInfo = FieldInfo.GetFieldFromHandle(myRuntimeFieldHandle);
         // Display the FieldInfo of myFieldInfo.
         outputBlock.Text += String.Format("{0}", myFieldInfo) + "\n";
      }
   }
}

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.