LINQ 在循环中添加到列表对象

发布于 2024-11-02 03:08:16 字数 651 浏览 0 评论 0原文

我遇到一种情况，我需要通过循环对象循环来填充列表对象，检查条件，如果满足条件，则将项目添加到我的列表中。目前，我找不到添加到列表所需的语法示例，而不是在每次循环迭代到下一项时清除它并重新填充它。有人可以帮忙吗？

List<ProfileRightsJSON> prf = new List<ProfileRightsJSON>();

try
{
    for (int i = 0; i < lstProfiles.Count; i++)
    {
        prf = (from p in _database.tblProfileRights
               where p.fkProfileID ==
               lstProfiles[i].ProfileID
               select new ProfileRightsJSON
               {
                   FunctionID = p.fkFunctionID,
                   UserTypeID = p.fkUserTypeID,
                   RecursiveRights = p.RecursiveRights
               }).ToList();
    }

原文

I have a situation where I need to populate a list object by looping through a loop of objects, check against a condition, and if the condition is met, add the item to my list. Currently I cannot find an example of the syntax required to add to the list rather than clear it and repopulate it each time the loop iterates to the next item. Can somebody help?

List<ProfileRightsJSON> prf = new List<ProfileRightsJSON>();

try
{
    for (int i = 0; i < lstProfiles.Count; i++)
    {
        prf = (from p in _database.tblProfileRights
               where p.fkProfileID ==
               lstProfiles[i].ProfileID
               select new ProfileRightsJSON
               {
                   FunctionID = p.fkFunctionID,
                   UserTypeID = p.fkUserTypeID,
                   RecursiveRights = p.RecursiveRights
               }).ToList();
    }

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很糊涂小朋友 2024-11-09 03:08:16

看起来您真的想要这样的东西：

var profileIds = lstProfiles.Select(x => x.ProfileID).ToList();

var prf = (from p in _database.tblProfileRights
           where profileIds.Contains(p.fkProfileID)
           select new ProfileRightsJSON
           {
               FunctionID = p.fkFunctionID,
               UserTypeID = p.fkUserTypeID,
               RecursiveRights = p.RecursiveRights
           }).ToList();

It looks like you really want something like this:

var profileIds = lstProfiles.Select(x => x.ProfileID).ToList();

var prf = (from p in _database.tblProfileRights
           where profileIds.Contains(p.fkProfileID)
           select new ProfileRightsJSON
           {
               FunctionID = p.fkFunctionID,
               UserTypeID = p.fkUserTypeID,
               RecursiveRights = p.RecursiveRights
           }).ToList();

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