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我怎樣才能使表達式添加一個計數器(ID)是1,2,3,4等...?我只是想有一些unqiue鍵來標識數據如何在lambda中創建標識列?
var query = data.Select(x =>
new DemoItemV1
{
Id = x.Field<double>("ID"),
AreaId = x.Field<int>("1Area ID"),
CategoryTitle = x.Field<string>("2Table Title")
}).ToList();
看看這一個。它顯示如何添加索引。http://stackoverflow.com/questions/365086/how-to-project-a-line-number-into-linq-query-results –