Cet article a fait l’objet d’une traduction automatique. Pour afficher l’article en anglais, activez la case d’option Anglais. Vous pouvez également afficher le texte anglais dans une fenêtre contextuelle en faisant glisser le pointeur de la souris sur le texte traduit.
Traduction
Anglais

OpCodes.Stelem_Ref, champ

 

Remplace l'élément de tableau situé à un index donné par la valeur de référence d'objet (type O) dans la pile d'évaluation.

Espace de noms:   System.Reflection.Emit
Assembly:  mscorlib (dans mscorlib.dll)

public static readonly OpCode Stelem_Ref

Valeur de champ

Type: System.Reflection.Emit.OpCode

The following table lists the instruction's hexadecimal and Microsoft Intermediate Language (MSIL) assembly format, along with a brief reference summary:

Format

Assembly Format

Description

A2

stelem.ref

Replaces an array element at the supplied index with the ref value (type O) on the stack.

The stack transitional behavior, in sequential order, is:

  1. An object reference to an array, array, is pushed onto the stack.

  2. A valid index to an element in array is pushed onto the stack.

  3. A value is pushed onto the stack.

  4. The value, the index, and the array reference are popped from the stack; the value is put into the array element at the given index.

The stelem.ref instruction replaces the value of the element at the supplied index in the one-dimensional array array with the ref (type O) value pushed onto the stack.

Arrays are objects and hence represented by a value of type O.The index is type native int.

Note that stelem.ref implicitly casts the supplied value to the element type of array before assigning the value to the array element.This cast can fail, even for verified code.Thus the stelem.ref instruction can throw InvalidCastException.For one-dimensional arrays that aren't zero-based and for multidimensional arrays, the Array class provides a SetValue method.

NullReferenceException is thrown if array is a null reference.

IndexOutOfRangeException is thrown if index is negative, or larger than the bound of array.

ArrayTypeMismatchException is thrown if array does not hold elements of the required type.

The following Emit method overload can use the stelem.ref opcode:

  • ILGenerator.Emit(OpCode)

Universal Windows Platform
Disponible depuis 4.5
.NET Framework
Disponible depuis 1.1
Portable Class Library
Pris en charge dans : portable .NET platforms
Silverlight
Disponible depuis 2.0
Windows Phone Silverlight
Disponible depuis 7.1
Windows Phone
Disponible depuis 8.1
Retour au début
Afficher: