Convert iqueryable to string

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August undefined, 2024

WebOct 7, 2024 · ok. here's the problem. your return type is IEnumerable or List. but in your linq, you select new Pe, e.MasterRelationType.RelationTypeDescr } which csharp cannot implicitly convert to IEnummerable. what you can do is : create a class (or model) that has e, … WebMar 21, 2024 · using (FeedIterator setIterator = container.GetItemLinqQueryable () .Where (b => b.Title == "War and Peace") …

EF Core 5.0: Using ToQueryString() method to translate LINQ …

WebMay 9, 2011 · EF only support a subset of DateTime operators. You can either put the result IQueryable<> into a list and then do the DateTime conversion there. Or if you don't like it … WebOct 7, 2024 · Maybe this answer is overly simplistic or is way off base, but have you tried the functions: myArray.AsQueryable http://msdn.microsoft.com/en … tncc workforce

Entity Framework/Core and LINQ to Entities (5) Query Translation ...

WebAug 9, 2012 · 1 solution Solution 1 Extension Method: C# var list = tempTable.Select (s=>new { s.ID, s.Name }).ToList (); Linq: C# var lists = from l in db.TempTables select … WebJul 4, 2012 · IQueryable query = from Comp in ServiceGroupdb.ServiceGroupes where (Comp.GroupID == groupID) select Comp.Name; // Loop over all the returned strings foreach(var s in query) … WebJul 24, 2015 · So are a pair of extension methods that allow you to turn an IQueryable into its SQL query. ToTraceQuery inlines all of the parameters, whereas ToTraceString tacks … tncd338

Entity Framework IQueryable to DataTable - IT宝库

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Webpublic string GetTableName () { IQueryable query = dbSet.Where (x => x.Id == 1); string sql = query.ToString (); Regex regex = new Regex (@"FROM\s+ (?WebMar 12, 2012 · The Where clause in thisw code snippet shows how you create a where clause using a parameterised string and then dynamically inject values for the parameters at run time, for example, based on user input. This works for parameters of any type. In your example, the where clause would be. whereClause = "AccountId = 1000";WebMar 28, 2012 · An IQueryable represents a query which could return any number of strings. You want one string - so you need to decide what to do in various situations: …WebMay 9, 2011 · EF only support a subset of DateTime operators. You can either put the result IQueryable<> into a list and then do the DateTime conversion there. Or if you don't like it …WebSep 14, 2024 · DataTable table = new DataTable (); table.Columns.Add ("Price", typeof(int)); table.Columns.Add ("Genre", typeof(string)); var query = from i in items where i.Price > 9.99 orderby i.Price select new { i.Price, i.Genre }; query.CopyToDataTable (table, LoadOption.PreserveChanges); ExampleWebMar 20, 2024 · The actual query that is sent to database server is here. SELECT TOP( 1) [p]. [Title] AS [Project], [c]. [Name] AS [Customer] FROM [Projects] AS [p] LEFT …WebOct 7, 2024 · public IQueryable GetProductByNameIQueryable (string category) { try { return _repository.GetProductByNameIQueryable (category); } catch { throw new …WebMar 21, 2024 · using (FeedIterator setIterator = container.GetItemLinqQueryable () .Where (b => b.Title == "War and Peace") …WebJul 4, 2012 · IQueryable < string > query = from Comp in ServiceGroupdb .ServiceGroupes where ( Comp .GroupID == groupID) select Comp .Name; // Loop over all the returned string s foreach (var s in query) { Console. WriteLine (s); } 或者使用前面提到的 query.FirstOrDefault () ，因为你只会得到一个结果。【讨论】：【解决方案4】：我发 …Web2 days ago · CS1503: Argument 1: cannot convert from 'T' to 'Microsoft.EntityFrameworkCore.ChangeTracking.EntityEntry' It seems like the behavior in mocking in EF Core is drastically different from EF. I saw someone put "EF Core allows you to use an in-memory provider for testing."WebOct 23, 2024 · That statement with the Where () call gets translated to something like this: SELECT aproperty, someproperty FROM someclass WHERE someproperty = 'Some Random String' That is very neat. The whole thing is extremely powerful. Not only do you get to filter the data, you can also perform joins.WebIQueryable MethodSyntax = studentList.AsQueryable() .Where(std => std.Gender == "Male"); //Iterate through the collection foreach (var student in MethodSyntax) { Console.WriteLine( $"ID : {student.ID} …Web我正在尝试将 IQueryable 对象转换为 DataTable.这是我想转换为 DataTable 的查询示例:var query = DbContext.SomeObjectSet.Select(x = new { PropertyName1 = x.ColumnName1, PropertyName2 = x.WebYou must hardcode the translation or you must first convert it to IEnumerable.IQueryable represents expression tree translated to some execution in used provider - in your case I believe it will be Entity framework. You can't use any automatic mapping in such query because it will be translated to SQL which will not understand your .net methods or …WebSep 3, 2014 · IEnumerable model = null ; model= ( from e in db.Operatrices join j in db.Operations on e.Id_Operatrice equals j.Id_Operatrice select new { Id_Operatrice = e.Id_Operatrice, Nom_Operatrice = e.Nom_Operatrice, Prenom_Operatrice = e.Prenom_Operatrice, Designation = j.Designation } ); return View (model);WebOct 17, 2024 · We can change the query as follows for better execution. using (var context = new LINQEntities()) { var fileCollection = context.FileRepository.Where(a => a.IsDeleted == false). Select(a => new { FilePath = a.FilePath } ).ToList(); } This query will be compiled into SQL in an optimized way as shown in the following screenshot.WebC# 从属性名称的字符串创建表达式？,c#,reflection,expression-trees,iqueryable,dynamic-queries,C#,Reflection,Expression Trees,Iqueryable,Dynamic Queries,我试图基于一些JSON创建一个查询，我目前将JSON解析为一组规则，每个规则包含字段名称、比较类型=、>等以及要比较的值我遇到的问题是，从那个规则中得到它，到一个 ...WebSep 2, 2024 · How to convert IQueryable < string > to string? Single returns the item, throws an exception if there are 0 or more than one item in the sequence. …WebFeb 17, 2024 · Th variable query is of type IMongoQueryable interface. You can apply any of its methods to get the output of your choice. For example, the following will get a List and print its contents (the names of the persons). var peopleList = query.ToList (); peopleList.ForEach (s => Console.WriteLine (s));WebOct 7, 2024 · ok. here's the problem. your return type is IEnumerable or List. but in your linq, you select new Pe, e.MasterRelationType.RelationTypeDescr } which csharp cannot implicitly convert to IEnummerable. what you can do is : create a class (or model) that has e, …WebJun 15, 2015 · You can use VBScript to get information from WMI. There are so many networking scripts. For example, use the following script to get the IP of the given net adapter. Just make sure to provide your VPN name instead of the "Local Area Connection 2" string: strComputer = "." Set objWMIService = GetObject (_ "winmgmts: \\" & …WebMar 3, 2024 · Обратите внимание на Cast qu.Provider.CreateQuery(result) имеющего тип IQueryable в IQueryable, это вообще стандартная практика для c#(посмотрите на IEnumerable), она возникла из-за необходимости обрабатывать все generic ...WebThe IQueryable interface is intended for implementation by query providers. It is only supposed to be implemented by providers that also implement IQueryable. If the provider does not also implement IQueryable, the standard query operators cannot be used on the provider's data source.WebJan 27, 2014 · You might want to read the error message. It's telling you EXACTLY what's wrong. You're trying to assign an object that is not a string to a property (Text) that …WebAug 20, 2014 · If you want to retrieve last record then do this : var lastClient = (from d in db.Clients where d.ClientID == client_id <--- //here it should be "==" not "=" orderby …WebIt is not possible to directly convert an IQueryable to a string because it represents a set of instructions to be executed, not the result of those instructions. However, you can …WebDec 24, 2024 · Hi, I'm doing comparison of date in SQLite, it's not comparing, I'm using this query which is written below. var today = (DateTime)criteria.Today; IQueryable createdTodayQuery = query.Where( patient => patient.CreationDate.HasValue && patient.CreationD · I don't see where DateTime2 is used in your example, but if you are …Web我正在嘗試從我的數據表創建一個詞典。目前，我是通過首先創建一個IList，然后遍歷List並將它們添加到字典中來實現此目的的，具體情況視情況而定，分別在列表中指定結果對象的Primary key屬性。我想知道是否可以使用泛型完成此操作。 Ive當前收到以下代碼，該代碼無法編譯或運行： adsbyWebJul 24, 2015 · So are a pair of extension methods that allow you to turn an IQueryable into its SQL query. ToTraceQuery inlines all of the parameters, whereas ToTraceString tacks …WebSyntax of LINQ AsQueryable Method Following is the syntax of using the LINQ AsQueryable method to convert list elements to IQueryable lists. LINQ AsQueryable Syntax in C# IQueryable query = objStudent.AsQueryable().Where(student => student.Name.Contains("Alavala")); LINQ AsQueryable Syntax in VB.NETWebNov 9, 2024 · public static string ToSql (this IQueryable query) where TEntity : class { if (! (query is EntityQueryable) && ! (query is InternalDbSet)) { throw new ArgumentException ("Invalid query"); } var queryCompiler = (IQueryCompiler)QueryCompilerField.GetValue (query.Provider);WebJul 4, 2012 · IQueryable query = from Comp in ServiceGroupdb.ServiceGroupes where (Comp.GroupID == groupID) select Comp.Name; // Loop over all the returned strings foreach(var s in query) …WebJul 4, 2012 · IQueryable query = from Comp in ServiceGroupdb.ServiceGroupes where (Comp.GroupID == groupID) select Comp.Name; // Loop over all the returned strings foreach(var s in query) { Console.WriteLine(s); } Or use query.FirstOrDefault() …WebJul 24, 2015 · So are a pair of extension methods that allow you to turn an IQueryable into its SQL query. ToTraceQuery inlines all of the parameters, whereas ToTraceString tacks them on the end (as it a more true representation of what is under the hood). Don’t get too carried away verifying strings within the query though as it may change.WebAug 9, 2012 · 1 solution Solution 1 Extension Method: C# var list = tempTable.Select (s=>new { s.ID, s.Name }).ToList (); Linq: C# var lists = from l in db.TempTables select …Webusing ( FluentModel dbContext = new FluentModel() ) { IQueryable products = from p in dbContext.Products orderby p.ProductName descending select p; Product[] productsArray = products.ToArray(); foreach ( Product product in productsArray ) { Console.WriteLine( product.ProductName ); } } See AlsoWebMar 25, 2024 · internal static void SelectAndFirstLinqExpressions (AdventureWorks adventureWorks) { IQueryable sourceQueryable = adventureWorks.Products; IQueryable selectQueryable = sourceQueryable.Select (product => product.Name); MethodCallExpression selectCallExpression = … .+)\s+AS"); Match match = regex.Match (sql); string table = match.Groups ["table"].Value; return (table); } Example #13 0 Show fileWebThe Conversion operators in LINQ are useful in converting the type of the elements in a sequence (collection). There are three types of conversion operators: As operators (AsEnumerable and AsQueryable), To operators (ToArray, ToDictionary, ToList and ToLookup), and Casting operators (Cast and OfType). WebNov 9, 2024 · public static string ToSql (this IQueryable query) where TEntity : class { if (! (query is EntityQueryable) && ! (query is InternalDbSet)) { throw new ArgumentException ("Invalid query"); } var queryCompiler = (IQueryCompiler)QueryCompilerField.GetValue (query.Provider); tncc workforce developmentWebC# 从属性名称的字符串创建表达式？,c#,reflection,expression-trees,iqueryable,dynamic-queries,C#,Reflection,Expression Trees,Iqueryable,Dynamic Queries,我试图基于一些JSON创建一个查询，我目前将JSON解析为一组规则，每个规则包含字段名称、比较类型=、>等以及要比较的值我遇到的问题是，从那个规则中得到它，到一个 ... tn ccw permit

"Web2 days ago · CS1503: Argument 1: cannot convert from 'T' to 'Microsoft.EntityFrameworkCore.ChangeTracking.EntityEntry' It seems like the behavior in mocking in EF Core is drastically different from EF. I saw someone put "EF Core allows you to use an in-memory provider for testing." " - Convert iqueryable to string

EF Core 5.0: Using ToQueryString() method to translate LINQ …

Entity Framework/Core and LINQ to Entities (5) Query Translation ...

Convert iqueryable to string

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