c# List使用中遇到的问题
标签:通过 actor 访问 color 修改 else ble 项目 span
最近在项目上写的方法,想通过减少访问数据层,将需要重复调用的值存入List,无意中碰到的一个巨坑,至今仍不明所以,在此写出来,一来是看看有没有同道中人,二来是看看有没有大牛能解惑。
逻辑如下:
1、从数据库中获取AList(yycfList)
2、new一个BLis(_yycfList),将AList中的部分值赋予它
3、改变BList中的值
4、AList的值也变了
代码如下:
1 List AList = GetAList();
2 List XList = GetXList();
3 List YList = GetYList();
4 foreach (var y in YList)
5 {
6 List BList = AList.FindAll(x => x.CustomType == y.CustomType);
7 if (y.IsPrivate || y.IsSustainable)
8 {
9 foreach (var b in BList)
10 {
11 X _x = XList.Find(x => x.Curve == b.Curve &&
12 x.CustomType == b.CustomType &&
13 x.FixType == (y.IsSustainable ? 2 : 1));
14 if (_x != null)
15 {
16
17 b.AFactor = b.AFactor + _x.DRange / 100; //此处修改后直接影响AList的值
18 b.CFactor = b.CFactor + ((_x.URange - _x.DRange) / 5 / 100);
19 }
20 }
21 }
22 }
最终解决代码:
1 List AList = GetAList();
2 List XList = GetXList();
3 List YList = GetYList();
4 foreach (var y in YList)
5 {
6 List BList = AList.FindAll(x => x.CustomType == y.CustomType);
7
8 if (y.IsPrivate || y.IsSustainable)
9 {
10 BList = new List (); //此处重新New BList
11 foreach (var b in AList.FindAll(x => x.CustomType == y.CustomType))
12 {
13 X _x = XList.Find(x => x.Curve == b.Curve &&
14 x.CustomType == b.CustomType &&
15 x.FixType == (y.IsSustainable ? 2 : 1));
16 B _b = new B(); //此处New一个B
17 if (_x != null)
18 {
19 _b.AFactor = b.AFactor + _x.DRange / 100;
20 _b.BFactor = b.BFactor;
21 _b.CFactor = b.CFactor + ((_x.URange - _x.DRange) / 5 / 100);
22 BList.Add(_b); //将改变后的B加入List
23 }
24 else
25 {
26 BList.Add(b); //无需改变则将旧B加入List
27 }
28 }
29 }
30 }
c# List使用中遇到的问题
标签:通过 actor 访问 color 修改 else ble 项目 span
原文地址:https://www.cnblogs.com/QApp/p/10577533.html
评论