After the enumerator maps its current value to a variable on each iteration of the loop , the property expression can use the value of this variable to update the value of the 属性的值。属性表达式可以使用映射到枚举器的集合值的变量值在每个循环迭代中动态更新
You can also map the enumerator collection value in a foreach loop container to a variable , and if an execute sql task uses a parameterized sql statement , you can map the parameters for the statement to variables 您还可以将foreach循环容器中的枚举器集合值映射为变量，如果执行sql任务使用参数化的sql语句，您可以将语句的参数映射为变量。
