IDataStore.RemoveAll<TModel>(Predicate<TModel> predicate) Method

.NET Standard 2.x

Removes rows that meet the specified conditions from the primary buffer of the DataStore.

Namespace: DWNet.Data

Assembly: DWNet.Data.dll

Syntax

  public int RemoveAll<TModel>(Predicate<TModel> predicate);

Type Parameters

TModel

Parameters

predicate System.Predicate<TModel>

A Predicate<TModel> object that you want to use as the search criteria.

Returns

System.Int32

Number of rows that are successfully removed.

Examples

The following code example demonstrates how to remove the data item according to the specified TModel.

using Appeon.ApiDoc.Models;
using DWNet.Data;
using System;

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

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

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

            datastore.Retrieve();

            Console.WriteLine("Before Remove, Rowcount: {0}", datastore.RowCount);

            // Removes the data item
            datastore.RemoveAll<D_Department>(a => a.Departmentid == 1);

            Console.WriteLine("After Remove, Rowcount: {0}", datastore.RowCount);

            /*This code produces the following output:
             
            Before Remove, Rowcount: 4
            After Remove, Rowcount: 3
            */
        }
    }
}

Example Refer To

Model Class: D_Department
DataWindow File: d_department

Applies to

.NET Standard

2.x