IDataStore.LastOrDefault<TModel>() Method

.NET Standard 2.x | Current Version (1.0.1)

0.5.0-alpha

1.0.1 (current)

Generic method. Returns the last data row of the DataStore. If no data row is found, returns null.

Namespace: PowerBuilder.Data

Assembly: PowerBuilder.Data.dll

Syntax

  public TModel LastOrDefault<TModel>();

Type Parameters

TModel

The type of a model class that matches with the current DataObject.

Returns

TModel

Return the TModel object which contains the data of the last row.

It returns null if no row is found.

Examples

The following code example demonstrates how to use the LastOrDefault method to get the last record object in DataStore.

using PowerBuilder.Data;
using System;

namespace Appeon.ApiDoc.IDataStoreExamples
{
    public class LastOrDefaultExample
    {
        private SchoolContext _context;

        public LastOrDefaultExample(SchoolContext dataContext)
        {
            // Sets the data context
            _context = dataContext;
        }

        public void Example1()
        {
            // Instantiates a DataStore object with datawindow: d_department.
            var datastore = new DataStore("d_department", _context);

            datastore.Retrieve();

            // The last record in the Department table is: 
            // departmentid = 7, name = Mathematics
            var department = datastore.LastOrDefault<D_Department>();

            Console.WriteLine("Department ID: {0}; Department Name: {1}",
                               department.Departmentid, department.Name);

            /*This code produces the following output:
             
            Department ID: 7; Department Name: Mathematics
            */
        }
    }
}

Example Refer To

Model Class: D_Department

Applies to

.NET Standard

2.x