generic-list

问题 I am successfully adding Display/Value pairs to a combobox like this: List<Student> BRStudents = studentsList.Where(h => h.EnrolledInAYttFM) .Where(i => i.RecommendedNextTalkTypeID.Equals(BIBLE_READING_TALK_TYPE)) .OrderBy(j => j.WeekOfLastAssignment) .ToList(); comboBoxBR.DataSource = BRStudents; comboBoxBR.DisplayMember = "FullName"; comboBoxBR.ValueMember = "StudentID"; ...but I then (in some instances) want to add another item to comboBoxBR, one which is not present in the BRStudents list

问题 I have the below classes public class cdsworkflows { public string WorkflowName; public string ActionGroup; } public class cdssystems { public string cdsSystemName; public List<cdsmodules> listModules; } public class cdsmodules { public string moduleName; public List<cdsworkflows> listWorkflows; } I am pushing the values to the above Objects from a table with all these data as below. I am getting error in "select new" that: Cannot implicitly convert type System.Collections.Generic.IEnumerable

问题 I can't seem to find how to free() the sub struct. Structs: typedef struct { char ID[5]; location *loc; } observer; typedef struct { double lat; double lng; } location; My Wrapper of Free() is: void free_obs_list_node(void *data) { free(*(observer **)data); } I can free the observer struct. I cannot free the pointer to the location Struct. This is my question: how do I free the location struct pointed to by location *loc; I used a wrapper of free() as these are node's in a generic linked list

问题 I can't iterate through a Generic List of Strings in Powershell. The Object is the members of a Lync chatroom. Command to get the Generic List: $crMembers = get-csPersistentChatroom -identity "XXXX" | select members The error I receive when trying to read the Strings in the Generic List is: WARNING: An error ocurred: Cannot convert value "@{Members=System.Collections.Generic.List`1[System.String]}" to type "System.Collections.Generic.List`1[System.String]". Error: "Cannot convert the "@

问题 I am trying to create a small web app, that when I type in a game name, it will search through a folder with a whole lot of icons to find one similar to the typed in game. I then want to show a repeater with the name of the icon, as well as the icon next to it. So far I have successfully displayed the name with this code: IEnumerable<string> getfiles = from f in Directory.EnumerateFiles(Server.MapPath("~/_resources/game_icon"), "*.*", SearchOption.AllDirectories) where Path.GetFileName(f)

问题 I have a ServiceContract , using System.Collections.Generic; using System.ServiceModel; namespace MainModule.Sub.Communication { [ServiceContract] public interface IWebMethod { [OperationContract(IsOneWay = false)] bool InvokeAlert(List<int> userIds); [OperationContract(IsOneWay = false, Name = "InvokeAlertByMainID")] bool InvokeAlert(List<int> userIds, int mainId); [OperationContract(IsOneWay = true)] void DeletePopupNotifications(System.Data.DataSet deletedNotifications); } } I used below

问题 I have an interface public interface IImageFilter<TIn, TOut> { // Properties TIn Input { get; set; } string Name { get; set; } Guid Guid { get; set; } TOut Process(TIn frame); } and I needed an observable collection of objects that implement the interface. private ObservableCollection<IImageFilter<T, U>> _imageFilters; the object that i pass to the collection can be IImageFilter<string, string> IImageFilter<string, int> IImageFilter<int, double> How do it declare the _imageFilters? what's the

问题 I have the following code class Program { static void Main(string[] args) { List<A> aList = new List<A>(); var aObj = new A(); aObj.Go(aList.Cast<IB>()); } } class A : IB { public void Go(IEnumerable<IB> interfaceList) { foreach (IB ibby in interfaceList) { Console.WriteLine("Here"); } } } interface IB { void Go(IEnumerable<IB> interfaceList); } } I originally tried passing a List but that doesn't work. After a lot of help from SO I found that passing IEnumerable is the only way to get the

问题 This question is somewhat related to my previous one answer to which helped me to find the reason why this simple iteration thru SqlDataReader: m_aFullIDList = New Generic.List(Of Integer) While i_oDataReader.Read m_aFullIDList.Add(i_oDataReader.GetInt32(0)) End While m_iTotalNumberOfRecords = m_aFullIDList.Count does not return all the records. Turned out when Generic.List changes its Capacity to accommodate more elements (e.g from 2^19 to next one 2^20) at this point SqlDataReader simple

问题 I have 3 different classes, a generic "entity" class, and then two classes that inherit this, a bullet class and an enemy class. I then have a list of the entity class, with the bullets and enemies in the list, and a lot of the places I treat these the same. However, some times, I want to loop through just one of the classes, and not the other, e.g. Loop through each bullet, but not the enemies. Is there any way to do this? I tried foreach (Bullet tempBullet in entities) But I get the error