ForEachVariableMappingEnumerator.Current 属性
Gets the current ForEachVariableMapping object from the collection.
命名空间： Microsoft.SqlServer.Dts.Runtime
程序集： Microsoft.SqlServer.ManagedDTS（在 Microsoft.SqlServer.ManagedDTS.dll 中）
语法
声明
Public ReadOnly Property Current As ForEachVariableMapping
Get
用法
Dim instance As ForEachVariableMappingEnumerator
Dim value As ForEachVariableMapping
value = instance.Current
public ForEachVariableMapping Current { get; }
public:
property ForEachVariableMapping^ Current {
ForEachVariableMapping^ get ();
}
member Current : ForEachVariableMapping
function get Current () : ForEachVariableMapping
属性值
类型：Microsoft.SqlServer.Dts.Runtime.ForEachVariableMapping
The current element in the collection.
注释
After an enumerator is created, or after a call to the Reset method, the MoveNext method must be called to advance the enumerator to the first element of the collection before the enumerator can read the value of the Current property; otherwise, Current is undefined and throws an exception.
Current also throws an exception if the last call to MoveNext returned false, which indicates the end of the collection.
Current does not move the position of the enumerator, and consecutive calls to Current return the same object until either MoveNext or Reset is called.
An enumerator remains valid as long as the collection remains unchanged. If changes are made to the collection, such as adding, modifying, or deleting elements, the enumerator is invalidated and becomes irrecoverable; thus, the next call to MoveNext or Reset throws an InvalidOperationException. However, if the collection is modified between calls to MoveNext and Current, Current returns the element that it is set to, even if the enumerator has been invalidated.