DwDataAttribute Class

.NET Standard 2.x

Specifies the provider for the initialized data, corresponding to the initialized data defined by DataWindow.

Namespace: DWNet.Data

Assembly: DWNet.Data.dll

Inheritance Constructor

System.Attribute

Syntax

   [AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
    public class DwDataAttribute : Attribute

Constructors

Name	Description
DwDataAttribute(Type dataProviderType)	Initializes a new instance of the DwDataAttribute class.

Properties

Name	Return Type	Description
DataProviderType	type	The type of the initial data provider

Remarks

The provider is inherited from the DwDataInitializer class. It contains the data for initializing DataStore. When exporting model from DataWindow, if DataWindow has initialized data, the class of the initial data provider will be automatically created.

Examples

The following code example demonstrates how to use the Model DwData attribute. The data in DataStore is not from the database, but from the external data source. It is defined in the class specified by the DwData attribute.

Example Method:

using System;
using DWNet.Data;

namespace Appeon.ApiDoc.DwDataAttributeExamples
{
    public class DwDataAttributeExample
    {
        public DwDataAttributeExample()
        {
        }

        public void Example()
        {

            var datastore = new DataStore("d_external_data");

            // Shows the total number of initial data rows
            Console.WriteLine($"datastore RowCount={datastore.RowCount}.");

            /* This code example produces the following output:
            
            datastore RowCount=3.
            */
        }
    }
}

Example Refer To

DataWindow File: d_external