EnvelopeGenerator/EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Services/CustomJsonDataConnectionProviderFactory.cs

using DevExpress.DataAccess.Json;
using DevExpress.DataAccess.Web;
namespace EnvelopeGenerator.WebUI.Client.Services;

public class CustomJsonDataConnectionProviderFactory : IJsonDataConnectionProviderFactory {
    public IJsonDataConnectionProviderService Create() {
        return new WebDocumentViewerJsonDataConnectionProvider(CustomDataSourceWizardJsonDataConnectionStorage.GetConnections());
    }
}

public class WebDocumentViewerJsonDataConnectionProvider : IJsonDataConnectionProviderService
{
    readonly List<JsonDataConnection> jsonDataConnections;
    public WebDocumentViewerJsonDataConnectionProvider(List<JsonDataConnection> jsonDataConnections) {
        this.jsonDataConnections = jsonDataConnections;
    }
    public JsonDataConnection GetJsonDataConnection(string name) {
        var connection = jsonDataConnections.FirstOrDefault(x => x.Name == name);
        if(connection == null)
            throw new InvalidOperationException();
        return connection;
    }
}