Beta builds of GTP.NET targeting .net core 3.1 WindowsForms available here:

https://plexityhide.com/pub/DOTNETCORE31_PlexityHide.GTP.dll.zip

Gantt_ASP uses generated images to build up the view.

The images used to come from an aspx page called GTPImg.aspx

This is no longer the case. Instead images are served up by a handler called GetImage.ashx.

Handlers are defined in the config file. The old developer server (before IIS Express) had a different way to define the handler.

Check the config file below if you have any problems to get images to show.

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <system.webServer>
    <!-- this section needed for iis7-->
    <handlers>
      <add name="GetImage" verb="*" path="GetImage.ashx" 
       type="PlexityHide.GTP.WEB.GetImage, PlexityHide.GTP.WEB" />
    </handlers>
  </system.webServer>
  <appSettings />
  <connectionStrings />
  <system.web>
    <!-- this section needed for developer server
    <httpHandlers>
      <add  verb="*" path="GetImage.ashx"
      type="PlexityHide.GTP.WEB.GetImage, PlexityHide.GTP.WEB" />
    </httpHandlers>
    -->

Summary of recent news in GTP.NET

When TimeScrollUse is true a scrollbar is added to allow scroll in time from TimeScrollMinDate to TimeScrollMaxDate

TimeItemStyle.RowHeightScale – To better facilitate use of screen space and time precision a new time item drawing style has been added.
In this style the drawing is divided into multiple rectangles – one per lower scale band – and the end parts are drawn as a schedule – both for start and end.
This allows users to have greater precision on move and resize:

Gantt_ASP

Gantt_ASP now use handler to serve up images and deals with error that IE10 & 11 use doubles as coordinates where as Chrome and FF use integers

RightToLeft support for the whole Gantt including Grid and Printing:

When you run newer versions of GTP.NET you get a button in the date scaler:

To remove this button from your production system you need a runtime key.

Runtime keys are free for registered users of GTP.NET.

This is how you create a runtime key

Visit this site: https://licenseandticket.azurewebsites.net/

Find the runtime key menu:

Enter you key – choose product (GTP.NET) – Generate key – copy the resulting key

In your application code do something like this – do this BEFORE component creation. You only need to do it once per application:

        public WinForm()
        {
            RuntimeKey.Check.Register("YOUR-GTPNET-KEY==", "THE LONG GENERATED KEY FROM ABOVE =");
        }

FAQ: But why? It is not fair that some use the GTP.NET without sharing the cost of maintenance.
The runtime key makes it easier for all users to remember to acquire a license and help share the cost of maintenance.

        private void gantt1_OnTimeItem_Hoover(PlexityHide.GTP.Gantt aGantt, PlexityHide.GTP.TimeItemEventArgs e)
        {
            if (aGantt.MouseMoveKind == MouseMoveKind.move)
            {
                textBoxEvents.Text = "Moving a time item";
                DateTime suggestedStart=gantt1.DateScaler.PixelToTime(e.x);
                // but we do not accept the suggested start - we want it to differ in complete days...
                double totaldays=Math.Round((e.TimeItem.Start - gantt1.DateScaler.PixelToTime(e.x)).TotalDays);
                e.x = gantt1.DateScaler.TimeToPixel(e.TimeItem.Start - new TimeSpan((int)totaldays,0,0,0));
            }

In IE10 and IE11 the coordinate system is all of a sudden in float numbers and not in integer as in all other browsers.

The AjaxControlToolkit has a GetElementPosition call deep down in it Common namespace that does some error checking.

The error checking it does is partly to verify that the coordinates it gets is of type integer – in IE10 and IE11 the will not be integers. Hence exceptions.

The error checking is only in effect when you have the scriptmanager in debug mode.

So to fix the errors you must do this:

          <asp:ToolkitScriptManager ID="ToolkitScriptManager2" runat="server" 
                 CombineScripts="False" ScriptMode="Release">
            <Scripts>        
              <asp:ScriptReference Name="Common.Common.js" Assembly="AjaxControlToolkit"  />
              <asp:ScriptReference Name="Compat.DragDrop.DragDropScripts.js" Assembly="AjaxControlToolkit"  />
              <asp:ScriptReference Name="PlexityHideAjax.Gantt_AjaxBehavior.js" Assembly="PlexityHideAjax"  />
            </Scripts>
          </asp:ToolkitScriptManager>

Once you have done this – the moving of time items from client side works just fine once again.