SqlBinary.Item[Int32] 属性
定义
从 Value 属性获取单字节,该属性位于整数参数 index 指示的位置。Gets the single byte from the Value property located at the position indicated by the integer parameter, index. 如果 index 指示位置位于字节数组的结尾以外,将引发 SqlNullValueException。If index indicates a position beyond the end of the byte array, a SqlNullValueException will be raised. 此属性为只读。This property is read-only.
public:
property System::Byte default[int] { System::Byte get(int index); };
public byte this[int index] { get; }
member this.Item(int) : byte
Default Public ReadOnly Property Item(index As Integer) As Byte
参数
- index
- Int32
要检索的字节的位置。The position of the byte to be retrieved.
属性值
位于整数参数指示的位置的字节。The byte located at the position indicated by the integer parameter.
例外
当 Value 属性包含 Null 时,读取该属性。The property is read when the Value property contains Null
- 或 --or-
index 参数指示超过字节数组长度(由 Length 属性指示)的位置。The index parameter indicates a position beyond the length of the byte array as indicated by the Length property.
注解
若要避免引发 SqlNullValueException ,请 IsNull Length 在读取此属性之前始终检查属性和属性。To avoid raising a SqlNullValueException, always examine the IsNull property and the Length property before reading this property.