OpCodes.Ldelem_U2 字段

定义

将位于指定数组索引处的 unsigned int16 类型的元素作为 int32 加载到计算堆栈的顶部。Loads the element with type unsigned int16 at a specified array index onto the top of the evaluation stack as an int32.

public: static initonly System::Reflection::Emit::OpCode Ldelem_U2;
public static readonly System.Reflection.Emit.OpCode Ldelem_U2;
 staticval mutable Ldelem_U2 : System.Reflection.Emit.OpCode
Public Shared ReadOnly Ldelem_U2 As OpCode 

字段值

注解

下表列出了指令的十六进制和 Microsoft 中间语言(MSIL)程序集格式以及简短的参考摘要:The following table lists the instruction's hexadecimal and Microsoft Intermediate Language (MSIL) assembly format, along with a brief reference summary:

格式Format 程序集格式Assembly Format 说明Description
9393 ldelem.u2ldelem.u2 将索引中类型为 unsigned int16 的元素加载到堆栈顶部作为 int32Loads the element with type unsigned int16 at index onto the top of the stack as an int32.

堆栈转换行为顺序如下:The stack transitional behavior, in sequential order, is:

  1. array 的对象引用推送到堆栈上。An object reference array is pushed onto the stack.

  2. 索引值 index 将被推送到堆栈上。An index value index is pushed onto the stack.

  3. index 和 @no__t 从堆栈中弹出;查找 array 位置 index 位置中存储的值。index and array are popped from the stack; the value stored at position index in array is looked up.

  4. 值推送到堆栈上。The value is pushed onto the stack.

@No__t-0 指令会在从零开始的一维 @no__t 数组中加载索引为 index (类型 native int)的元素的值,并将其放在堆栈顶部。The ldelem.u2 instruction loads the value of the element with index index (type native int) in the zero-based one-dimensional array array and places it on the top of the stack. 数组是对象,因此由类型 O 的值表示。Arrays are objects and hence represented by a value of type O.

@No__t 的返回值为-0 @no__t。The return value for ldelem.u2 is int16.

请注意,在将小于4个字节的整数值加载到计算堆栈上时,将其扩展到 int32 (而不是 native int)。Note that integer values of less than 4 bytes are extended to int32 (not native int) when they are loaded onto the evaluation stack.

如果 array 为 null 引用,则会引发 NullReferenceExceptionNullReferenceException is thrown if array is a null reference.

如果 array 不包含所需类型的元素,则会引发 ArrayTypeMismatchExceptionArrayTypeMismatchException is thrown if array does not hold elements of the required type.

如果 index 为负数或大于 array 的界限,则会引发 IndexOutOfRangeExceptionIndexOutOfRangeException is thrown if index is negative, or larger than the bound of array.

以下 @no__t 0 方法重载可以使用 @no__t 操作码:The following Emit method overload can use the ldelem.u2 opcode:

  • ILGenerator.Emit(OpCode)ILGenerator.Emit(OpCode)

适用于