任何.Net函数或linq查询以取消数据透视 [英] Any .Net function or linq query to unpivot data
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问题描述
是否有可用的.net库来取消透视Excel数据?我目前正在使用LinqToExcel框架从电子表格中读取数据,因此不确定是否存在可用于执行取消透视的动态linq查询.感谢您的任何建议.顺便说一句,我正在寻找一种可以处理多列的解决方案.
Is there any .net library available to unpivot excel data? I am currently using LinqToExcel framework to read data from spreadsheets, so not sure if there are dynamic linq queries available to perform the unpivot. Thanks for any suggestions. BTW, I am looking for a solution which could handle multiple columns.
示例 原始表格
Product Location Customer1 Customer2 Customer3
A X 10 20 100
目的地表
Product Location Customer Demand
A X Customer1 10
A X Customer2 20
A X Customer3 100
推荐答案
尝试如下操作:
var customer1 =
from c in excel.Worksheet()
select new
{
Product = c["Product"],
Location = c["Location"],
Customer = "Customer1",
Demand = c["Customer1"],
};
var customer2 =
from c in excel.Worksheet()
select new
{
Product = c["Product"],
Location = c["Location"],
Customer = "Customer2",
Demand = c["Customer2"],
};
var customer3 =
from c in excel.Worksheet()
select new
{
Product = c["Product"],
Location = c["Location"],
Customer = "Customer3",
Demand = c["Customer3"],
};
var customers = customer1.Union(customer2).Union(customer3);
根据您的评论尝试以下操作:
Based on your comment try this:
var columns = 4; /* how many columns to unpivot */
var customers =
from n in Enumerable.Range(2, columns)
from c in excel.Worksheet()
select new
{
Product = c["Product"].Value,
Location = c["Location"].Value,
Column = n.ToString(),
Demand = c[n].Value,
};
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