class Model
{
public string col {get;set;}
public string co2 {get;set;}
public string co3 {get;set;}
public string co4 {get;set;}
}
var result = new list<Model>{new Model { col1 = "1",col2 = "True",col3 = "True",col4 = "True"}
,
new Model { col1 = "2",col2 = "True",col3 = "False",col4 = "True"}
,
new Model { col1 = "2",col2 = "True",col3 = "False",col4 = "False"}
};对 result 后3列进行group by True算1其余算2 不考虑异常情况 谢谢了
分不多 请见谅
.Select(x => new Model()
{
col1 = (x.col2 == "True" && x.col3 == "True" == x.col4 == "True") ? "1" : "2",
col2 = x.col2,
col3 = x.col3,
col4 = x.col4
});
void Main()
{
var result = new List<Model>{
new Model { col1 = "1",col2 = "True",col3 = "True",col4 = "True"},
new Model { col1 = "2",col2 = "True",col3 = "False",col4 = "True"},
new Model { col1 = "2",col2 = "True",col3 = "False",col4 = "False"}
};
var query=result.GroupBy(r=>new {r.col2,r.col3,r.col4})
.Select(g=>new Model{
col1=g.FirstOrDefault().col1,
col2=g.Key.col2=="True"?"1":"2",
col3=g.Key.col3=="True"?"1":"2",
col4=g.Key.col4=="True"?"1":"2"
});
Console.WriteLine(query);
}class Model
{
public string col1 {get;set;}
public string col2 {get;set;}
public string col3 {get;set;}
public string col4 {get;set;}
}