IDataStoreBase.Validate() Method

.NET Standard 2.x

Verifies the data using the data validation rules set in the DataStore.

Namespace: DWNet.Data

Assembly: DWNet.Data.dll

Syntax

  public bool Validate();

Returns

System.Boolean

Returns true if all data meet the validation rule; false if any data does not meet the validation rule.

Examples

The following code example specifies the validation rule (budget > 0), and then modifies one of the budget values to a negative value. The Validate method will return false if any data does not meet the rule.

using DWNet.Data;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;

namespace Appeon.ApiDoc.IDataStoreBaseExamples
{
    public class ValidateExample
    {
        private readonly SchoolContext _context;

        public ValidateExample(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);

            // Retrieves rows from the database for datastore
            datastore.Retrieve();

            // Sets the validation rule with the third column: 
            // value for budget must be greater than 0.
            datastore.SetValidate(2, "budget > 0");

            // Sets the vaue for budget in row 1 to -350000.
            datastore.SetItem(0, "budget", -350000m);

            // If all data passes validation, commit data to database, 
            // otherwise, display an error.
            if (datastore.Validate())
            {
                datastore.Update();
            }
            else
            {
                Console.WriteLine("Invalid data! Please check!");
            }

            /*This code produces the following output:
            
            Invalid data! Please check!
            */
        }
    }
}

Example Refer To

Model Class: D_Department
DataWindow File: d_department

Applies to

.NET Standard

2.x