Develop a PageEventBase Plugin

PageEventBase plugin is a part of Uniconta Windows API. It can be found under Uniconta.WindowsAPI.PageEventBase.cs. For performing some work on inserting, updating, deleting, validating, on property change of a record on gridbase page, create a new plugin by extending PageEventBase.cs class and overriding virtual methods described in below code snippet.

//Summary
// The abstract class PageEventsBase to be inherited for creating PageEventBase Plugin dll
//Summary
public abstract class PageEventsBase
{
    public CrudAPI api;
    public UnicontaBaseEntity master;
    public object page;

    //summary
    // PageEventsBase constructor
    //summary
    public PageEventsBase()
    {
    }

    //summary
    // Variable _LastError
    //summary
    protected string _LastError;

    //summary
    // The GetLastError method to get last error
    //summary
    public string GetLastError { get { var s = _LastError; _LastError = null; return s; } }


    //summary
    // The Initialize method to set local variables
    //summary
    //Params object page :- to pass the page object
    //Params CrudAPI api :- to pass the api
    //Params UnicontaBaseEntity master :- to pass the master
    public void Initialize(object page, CrudAPI api, UnicontaBaseEntity master)
    {
        this.page = page;
        this.api = api;
        this.master = master;
    }

    //summary
    // Virtual method Init to initialize values
    //summary
    //Params object page :- to pass the page object
    //Params CrudAPI api :- to pass the api
    //Params UnicontaBaseEntity master :- to pass the master
    public virtual void Init(object page, CrudAPI api, UnicontaBaseEntity master)
    {
        this.page = page;
        this.api = api;
        this.master = master;
    }

    //summary
    // Virtual method Validate, when record is validated
    //summary
    //Params UnicontaBaseEntity record :- to pass the record
    public virtual ErrorCodes Validate(UnicontaBaseEntity record) { return 0; }

    //summary
    // Virtual method OnInsert, when record is inserted
    //summary
    //Params UnicontaBaseEntity record :- to pass the insterted record
    public virtual ErrorCodes OnInsert(UnicontaBaseEntity record) { return 0; }

    //summary
    // Virtual method OnUpdate, when record is updated
    //summary
    //Params UnicontaBaseEntity record :- to pass the updated record
    //Params UnicontaBaseEntity original :- to pass the original record
    public virtual ErrorCodes OnUpdate(UnicontaBaseEntity record, UnicontaBaseEntity original) { return 0; }

    //summary
    // Virtual method OnDelete, when record is deleted
    //summary
    //Params UnicontaBaseEntity record :- to pass the deleted record
    public virtual ErrorCodes OnDelete(UnicontaBaseEntity record) { return 0; }

    //summary
    // Virtual SelectedRowChanged, when selected row of grid is changed
    //summary
    public virtual void SelectedRowChanged(SelectedItemChangedArgs e)
    {
    }

    //summary
    // Virtual event Record_PropertyChanged, when property value is changed
    //summary
    public virtual void Record_PropertyChanged(object sender, PropertyChangedEventArgs e)
    {
    }

    //summary
    // Virtual method OnMenuClickedClicked, when local menu is clicked
    //summary
    //Params string ActionType :- to pass the local ribbon menu action type string
    [Obsolete("Use OnMenuItemClicked function instead. It will be removed in future versions")]
    public virtual bool OnMenuClickedClicked(string ActionType)
    {
        return true;
    }

    //summary
    // Virtual method OnMenuItemClicked, when local menu is clicked
    //summary
    //Params string ActionType :- to pass the local ribbon menu action type string
    //Params object sender :- to pass the local menu ribbon item
    public virtual bool OnMenuItemClicked(string ActionType, object sender)
    {
        return true;
    }

    //summary
    // Virtual method OnMenuItemClicked, when local menu is clicked
    //summary
    //Params string ActionType :- to pass the local ribbon menu action type string
    //Params object sender :- to pass the local menu ribbon item
    public virtual bool OnMenuItemClicked(string ActionType, object sender, object args)
    {
        return true;
    }

    //summary
    // Virtual method PageClosing, when page is closed
    //summary
    public virtual void PageClosing()
    {
    }

    //summary
    // Virtual method CheckMandatoryFields, when madatory fields are validated
    //summary
    //Params UnicontaBaseEntity record :- to pass the record
    public virtual string CheckMandatoryFields(UnicontaBaseEntity record)
    {
        return null;
    }

    //summary
    // Trace method, for opening trace window
    //summary
    //Params string msg :- to pass message for tracing
    public void Trace(string msg)
    {
        var traceFunction = this.page?.GetType().GetMethod("Trace");
        traceFunction?.Invoke(this.page, new object[] { msg });
    }

    //summary
    // ShowMessageBox method, for showing messagebox
    //summary
    //Params string msg :- to pass message
    //Params string caption :- to pass caption
    //Returns MessageBoxResult;
    public MessageBoxResult ShowMessageBox(string msg, string caption)
    {
        return MessageBox.Show(msg, caption, MessageBoxButton.OK);
    }
}

Handling menu events

Menu events can be handled on the basis of ActionType

For example: To restrict adding or deleting row on certain conditions, user can handle onMenuItemClicked  event like this:

public override bool OnMenuItemClicked(string ActionType, object sender, object arguments)
{
	if (ActionType == "PreAddRow" || ActionType == "PreDeleteRow")
	return false;
	return true;
}

Installing a PageEventsBase plugin

1. Similarly to other plugins, put the .dll file into the C:\Uniconta\PluginPath folder.
2. Go to Tools-> Menus-> User Plugin, then add UserPlugin, specify the name of the plugin, select control name on which plugin will work, select PageEventBasePlugin by clicking on ‘+’ button if it is a partner plugin, otherwise just type in the name of the .dll file. Specify the class name inheriting PageEventBase class. Lastly, choose type of plugin to Event