So I tried to follow this example to have a sub-query in the where clause of this LINQ query. var innerquery = from app in context.applications select new { app.app_id }; IEnumerable<postDatedCheque> _entityList = context.postDatedCheques .Where(e => innerquery.Contains(e.appSancAdvice.application.app_id)); The objective was to select those records from postDatedCheques th
所以我试图按照这个例子在这个LINQ查询的where子句中有一个子查询。 var innerquery = from app in context.applications select new { app.app_id }; IEnumerable<postDatedCheque> _entityList = context.postDatedCheques .Where(e => innerquery.Contains(e.appSancAdvice.application.app_id)); 目标是从应用程序表中具有app_id的postDatedCheques中选择这些记录。 但是我在where子句中遇到了以
Does anyone know how, or have any links on how to filter the data returned in a textbox that is based on the value of the selected item in a dropdownlist. ie If a user selects hotel from a list, then when they start typing in the textbox only the address of the companies whos category matches hotel will appear using autocomplete. I have added my server side code below, but I'm getting the
有谁知道如何过滤基于下拉列表中所选项目的值的文本框中返回的数据的方式或链接。 即，如果用户从列表中选择酒店，那么当他们开始在文本框中输入时，只有与酒店相匹配的公司的地址将使用自动完成来显示。 我在下面添加了我的服务器端代码，但出现以下错误。 public JsonResult FilterDirectorySearch(string searchText, string context) { var wq = DirectoryList(searchText,context).Select(a =>
i face to face 3 errors on where clause" _list.Where (whereClause) " how to solve it? Error 1 'System.Collections.Generic.List ' does not contain a definition for 'Where' and the best extension method overload 'System.Linq.ParallelEnumerable.Where (System.Linq.ParallelQuery , System.Func )' has some invalid arguments Error 2 Instance argument: can
我面对3条错误where子句“ _list.Where （whereClause） “如何解决它？ 错误1 “System.Collections.Generic.List '不包含'Where'和最佳扩展方法重载的定义'System.Linq.ParallelEnumerable.Where （System.Linq.ParallelQuery ，System.Func ）'有一些无效的论点 错误2实例参数：无法从“System.Collections.Generic.List”转换 '到'System.Linq.ParallelQuery “ 错误3参数2：无
I have managed to get the following working: var transactions = from t in context.Transactions group t.Create_Date_Time by t.Participation_Id into t1 select new { ParticipationId = t1.Key, CreateDateTime = t1.Max() }; var cases = from c in context.Cases group c.Create_Date_Time by c.Participation_Id into c1
我设法得到以下工作： var transactions = from t in context.Transactions group t.Create_Date_Time by t.Participation_Id into t1 select new { ParticipationId = t1.Key, CreateDateTime = t1.Max() }; var cases = from c in context.Cases group c.Create_Date_Time by c.Participation_Id into c1 select new
I have a DataGrid in my current WPF Application which I would like to bind to a ViewModel that holds a ObservableCollection. The user can enter search values in some TextBoxes and after enter has been hit I am performing an query to our database that retunrs a table of records. From these records I am populate the data for the ObservableCollection. I am now struggeling now that the datagrid is
我在我当前的WPF应用程序中有一个DataGrid，我想绑定到包含ObservableCollection的ViewModel。 用户可以在某些文本框中输入搜索值，并且在输入完成后，我正在对我们的数据库执行查询，以重新查询记录表。 从这些记录中填充ObservableCollection的数据。 现在我正在构造数据网格不显示数据。 我已经阅读了一堆关于绑定的帖子，但我仍然错过了一些我认为的东西。 Product.cs public class Product : InotifyPropertyChanged
So I have almost identical thing set up with TextBoxes/ListBoxes and so on but it just doesn't seem to work with dataGrid.. So I have a view Index which contains dataGrid. I created a IndexModel class which is as follows: public class IndexModel : INotifyPropertyChanged { private ObservableCollection<Schedule> _schedules; public IndexModel(ObservableCollection<Schedule&
所以我有几乎与TextBoxes / ListBoxes等设置相同的东西，但它似乎并不适用于dataGrid .. 所以我有一个包含dataGrid的视图索引。 我创建了一个IndexModel类，如下所示： public class IndexModel : INotifyPropertyChanged { private ObservableCollection<Schedule> _schedules; public IndexModel(ObservableCollection<Schedule> schedules) { _schedules = schedules; } publi
I need your help with WPF Datagrid. I looked at some answered questions in platform and made something similar, but cant resolve some problems. I have struct named as Table public struct Table { public string Name { get; set; } public int Value { get; set; } } and Class named as Room public class Room : INotifyPropertyChanged { public string strRoomlName; public string Name
我需要您与WPF Datagrid的帮助。 我在平台上查看了一些回答的问题，并做了类似的事情，但无法解决一些问题。 我有结构命名为表 public struct Table { public string Name { get; set; } public int Value { get; set; } } 和名为Room的Class public class Room : INotifyPropertyChanged { public string strRoomlName; public string Name { get { return strRoomlName; } set { st
I have a WPF Browserapplication which gets data stored on a SQL Server, stores it in a DataTable and displays it in a DataGrid. Now I want to have a TextBox where you can search entries in the DataTable but when I load the Application I'm getting an error telling me, that the row [Company] cannot be found. I think the problem is, that the DataTable isn't yet filled when the filter is b
我有一个WPF Browserapplication，它将数据存储在SQL Server上，将其存储在DataTable中并将其显示在DataGrid中。 现在我想要一个TextBox，您可以在DataTable中搜索条目，但是当我加载应用程序时，出现错误告诉我，无法找到[Company]行。 我认为问题在于，当过滤器应用于DataTable时，DataTable尚未填充。 有人可以给我一个提示如何使这个工作？ DataTable dt = new DataTable(); public Page1() { InitializeComponent(
I am using an ObservableCollection bound to a WPF DataGrid, the collection contains instances of a custom class (About 500) and the custom class is relativly basic (2 Strings, an IP and a custom enum) I am using the following code to filter the grid (using all columns) as text is typed into a textbox. private void searchBox_TextChanged(object sender, TextChangedEventArgs e) { CollectionVie
我使用绑定到WPF DataGrid的ObservableCollection，集合包含一个自定义类的实例（约500个），而自定义类是相对基本的（2个字符串，一个IP和一个自定义枚举） 我正在使用下面的代码来过滤网格（使用所有列）作为文本输入到文本框中。 private void searchBox_TextChanged(object sender, TextChangedEventArgs e) { CollectionViewSource SearchView = new CollectionViewSource(); SearchView.Filter += Search_Filter
I want to achieve two things. First, I want this join to be case insensitive. I have used this case insensitive where clause in the past where b.foo.Equals(foo, StringComparison.OrdinalIgnoreCase) but I dont now, how to use it in join. Second, I would like to return tuple with authors name and count of their books. var query = from b in Books join a in authors
我想实现两件事情。 首先，我希望这个连接不区分大小写。 我在过去的where子句中使用了这种情况 where b.foo.Equals(foo, StringComparison.OrdinalIgnoreCase) 但我现在不用，如何在连接中使用它。 其次，我想返回带有作者姓名和他们书籍数量的元组。 var query = from b in Books join a in authors on b.Author equals a select Tuple.Create(a, _count_of_authors_