Get all rows of specific class type into List

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I have class

public class testClass
    public int testClassID { get; set; }
    public int param1ID { get; set; }
    public int param2ID{ get; set; }

Then in controller I want to find all rows and put them into list but use specific param during find

List<testClass> Rows = _context.testClasses.Find(u => u.param2ID== param2ID).ToList();

After writing this I get error

cannot convert lambda expression of type 'object' because it's not a delegate type

You probalby mean Where:

List<testClass> Rows = _context.testClasses.Where(u => u.param2ID == param2ID).ToList();

row-selector, Get data for all rows in the table: Select rows by two class name selectors: Very similar to the above node type (since a jQuery object is an array-like list of� Convert DataTable to List using a Generic Method This is a generic method that will convert any type of DataTable to a List (the DataTable structure and List class structure should be the same). The following are the two functions in which if we pass a DataTable and a user defined class.

Find method returns an object and cannot be converted to List. This is what you need:

List<testClass> Rows = _context.testClasses.Where(u => u.param2ID == param2ID).ToList();

Java ArrayList - ArrayList methods, sorting, traversing, Java ArrayList tutorial shows how to work with ArrayList collection in Java. List; public class ListAddItem { public static void main(String[] args) { List<String> langs The example uses the get() and size() methods of the ArrayList When we add multiple data types to a list, we omit the angle brackets. Here is a few ways to do it (Just assume I'm using Dependency Injection for the DbConext) public class Example { private readonly DbContext Context; public Example(DbContext context) { Context = context; } public DbSetSampleOne[] DbSamples { get; set; } public void ExampleMethod DoSomething() { // Example 1: This will select everything from the entity you want to select DbSamples = Context

Try this solution

List<testClass> _resp = _context.testClasses.Where(u => u.param2ID == u.param2ID).ToList();

C# List - How to C# List - CSharp, The C# List < T > class represents a strongly typed list of objects that can be and it supports storing values of a specific type without casting to or from object. You can retrieve items from List collection by using for loops. cursor.fetchall () fetches all the rows of a query result. It returns all the rows as a list of tuples. An empty list is returned if there is no record to fetch. cursor.fetchmany (size) returns the number of rows specified by size argument.

List (Java Platform SE 8 ), The List interface provides two methods to search for a specified object. presence of an ineligible element may throw an exception, or it may simply return false; Inserts all of the elements in the specified collection into this list at the first to last element); the runtime type of the returned array is that of the specified array. Returns a row object for the specified row of the rowset. Example. In the following example, all of the lines of code do the same thing: they return the 5 th row from the rowset (&ROWSET is a rowset object.) &ROW = GetRowset ().GetRow (5); &ROW = GetRowset () (5); &ROW = &ROWSET.GetRow (5); &ROW = &ROWSET (5);

List<T>.Find(Predicate<T>) Method, Searches for an element that matches the conditions defined by the specified predicate, defined by the specified predicate, if found; otherwise, the default value for type T . The following example demonstrates the Find method on a List<T> that public class Example { public static void Main() { // Create a list of parts. Read CSV via csv.DictReader method and Print specific columns. For the below examples, I am using the country.csv file, having the following data: COUNTRY_ID,COUNTRY_NAME,REGION_ID AR,Argentina,2 AU,Australia,3 BE,Belgium,1 BR,Brazil,2 CA,Canada,2 CH,Switzerland,1 CN,China,3 1. Read CSV Columns into List and Print on The Screen

Convert DataTable to List In C#, This article shows 3 ways to convert a DataTable to a List in C#. Rows.Add(1, " Manish", "Hyderabad","0000000000");; dt.Rows.Add(2, "Venkat" Now I will convert the receding DataTable into a List< Student > using all the any type of DataTable to a List (the DataTable structure and List class structure� There are two types of HTML tables published on the web- Static tables: Data is static i.e. Number of rows and columns are fixed.; Dynamic tables: Data is dynamic i.e. Number of rows and columns are NOT fixed.

  • If that's this Find method then it expects a params object[] but you're passing a lambda to it, thus the error.
  • How are testClasses defined?
  • .Find() only returns one element, use .FindAll() or .Where()
  • Welcome to strong typed programming language ;)