Type.GetField Method (String)

July 28, 2014

Searches for the public field with the specified name.

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

public FieldInfo GetField(
	string name
)

Parameters

name
Type: System.String
The String containing the name of the data field to get.

Return Value

Type: System.Reflection.FieldInfo
A FieldInfo object representing the public field with the specified name, if found; otherwise, null.

ExceptionCondition
ArgumentNullException

name is null.

NotSupportedException

This Type object is a TypeBuilder whose CreateType() method has not yet been called.

The search for name is case-sensitive. The search includes public static and public instance fields.

If the current Type represents a constructed generic type, this method returns the FieldInfo with the type parameters replaced by the appropriate type arguments.

If the current Type represents a type parameter in the definition of a generic type or generic method, this method searches the fields of the class constraint.

The following example gets the Type object for the specified class, obtains the FieldInfo object for the field, and displays the value of the field.



using System;
using System.Reflection;

public class MyFieldClassA
{
   public string Field = "A Field";
}

public class MyFieldClassB
{
   private string field = "B Field";
   public string Field
   {
      get
      {
         return field;
      }
      set
      {
         if (field != value)
         {
            field = value;
         }
      }
   }
}

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      MyFieldClassB myFieldObjectB = new MyFieldClassB();
      MyFieldClassA myFieldObjectA = new MyFieldClassA();

      Type myTypeA = typeof(MyFieldClassA);
      FieldInfo myFieldInfo = myTypeA.GetField("Field");

      Type myTypeB = typeof(MyFieldClassB);
      FieldInfo myFieldInfo1 = myTypeB.GetField("field",
          BindingFlags.NonPublic | BindingFlags.Instance);

      outputBlock.Text += String.Format("The value of the public field is: '{0}'\n",
          myFieldInfo.GetValue(myFieldObjectA));

      try
      {
         // In Windows Phone, the value of a private field cannot be accessed
         // by using reflection.
         outputBlock.Text += String.Format("The value of the private field is: '{0}'\n",
            myFieldInfo1.GetValue(myFieldObjectB));
      }
      catch (Exception ex)
      {
         outputBlock.Text += ex.GetType().Name + " occurred: " + ex.Message;
      }
   }
}

/* This code produces output similar to the following:

The value of the public field is: 'A Field'
FieldAccessException occurred: MyFieldClassB.myField
 */


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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