// Variable columnQuery is an IEnumerable<int>. // The following query performs two steps: // 1) use Split to break each row (a string) into an array // of strings, // 2) convert the element at position examNum to an int // and select it. var columnQuery = from li...
// The following query performs two steps: // 1) use Split to break each row (a string) into an array // of strings, // 2) convert the element at position examNum to an int // and select it. var columnQuery = from line in strs let elements = line.Split(',') select Co...
convert datatable column values double[] convert date string from yyyy/MM/dd format to datetime yyyy/MM/dd format Convert Datetime column from UTC to local time in select statement Convert DateTime to Base64 string Convert DateTime to smalldate on C# Convert Datetime to String in C# convert de...
// The following query performs two steps: // 1) use Split to break each row (a string) into an array // of strings, // 2) convert the element at position examNum to an int // and select it. var columnQuery = from line in strs let elements = line.Split(',') select Convert...
In a join clause, if only one of the comparison keys is a nullable value type, you can cast the other to a nullable value type in the query expression. In the following example, assume thatEmployeeIDis a column that contains values of typeint?: ...
int[] numbers = [5,10,8,3,6,12];//Query syntax:IEnumerable<int> numQuery1 =fromnuminnumberswherenum %2==0orderbynumselectnum;//Method syntax:IEnumerable<int> numQuery2 = numbers .Where(num => num %2==0) .OrderBy(n => n);foreach(intiinnumQuery1) { Console.Write(i +" ")...
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Mapping; [Table("Products")] public class Product { [PrimaryKey, Identity] public int ProductID { get; set; } // Property `Name` will be ignored as it lacks `Column` attibute. public string Name { get; set; } } Fluent Configuration This method lets you configure your mapping ...
The properties in the entity class match up to the columns in the database via the Column attribute, where the Name value is the database column name and the Storage value is the internal storage for the class of the data. Events for the property changes are wired into the setter for th...
SELECT * FROM People WHERE Firstname IN ('Alex', 'Colin', 'Danny', 'Diego')A SQL IN is equivalent to a LINQ ContainsIn the LINQ (to objects) world there is no 'IN' so you need to reverse the order like and use the Contains method:...