Hi guys,

I've got a view model that implements IValidatableObject for some DateTime fields that are used with the DateTimePicker. If the validation fails in the Validate method for the DateTime fields they return the error but after fixing the issue (for example DateTime cannot be in the past) the view model and control continues to use a empty/default DateTime value (1-1-1901 12:00 AM) and there's no way to get the model back to a valid state. 

The attached image is the form at start. The two DateTime fields are set to the current time. One you submit the form the Validate method kicks in and recognizes the date in the past and throws back the error message. The second image shows the error message in the form. The third image shows the corrected value to be a time in the future (using the time picker). The fourth image shows the form after the POST where the time gets reset back to 1/1/1901 12:00 AM and throws the error it can't be in the past. No matter how many times you change this field it keeps throwing this error.

Here's the Validate method:

I have a grid with a popup editor that has lots of content. There is a problem is when you scroll down and the window title is no longer visible. When I make changes to some of the kendo elements in the popup (grid, editor), the browser then scrolls up to the top of the window. 

How can I prevent this scroll up?

I have a grid:

with a custom editor on a field:

The custom editor displays correctly for the Item field.  When Customer changes (happens elsewhere) it is cascading properly and the read action is getting called.  The read action is returning results (can see this by inspecting the result in the RequestEnd event) but no results are actually displayed in the MultiColumnComboBox.  I have another MultiColumnComboBox elsewhere on the page that is not in the grid that cascades from the same value and does an almost identical lookup and it works fine.

What am I missing here?  or is this a bug and if so how do I work around it?

Hi, I have a problem displaying multiple needles with the radial gauge. 

I have a radialGauge defined as such:

Then some js to set the values:

When I only set the pointer index 0,1,2, and 3, the gauge does not work.  The needles remain at zero and do not go to the specified value. 

However, if another value is added to an index that doesn't even exist... everything works.  

-Steve

Hi,

I'm doing some testing with TreeView and want just the top level(level = 0) nodes to be loaded initially. I only want
to load second level nodes(level = 1) when I click on the arrow next to one of the top level nodes.

I set LoadOnDemand to true in the View file, and HasChildren to true for all of the top level nodes in the Controller,
but I still don't get arrows next to my top level nodes.

Here's the code from my View file that creates the TreeView:

              @(
                 Html.Kendo().TreeView()
                 .Name("treeview")
                 .HtmlAttributes(new { style = "font-size: 11px; vertical-align: middle;" })
                 .Events(events => events
                       .Select("onSelect")
                       .Expand("onExpand")
                 )
                 .LoadOnDemand(true)
                 .BindTo((IEnumerable<TreeViewItemModel>)ViewBag.Regions)
              )

And here's the code from my Controller class that creates the collection of Regions that I bind to the tree in the View file:

                List<TreeViewItemModel> regions = new List<TreeViewItemModel>();
                foreach (DataRow r in dt.Rows)
                {
                    TreeViewItemModel theModel = new TreeViewItemModel();
                    theModel.Text = (string)r["regionName"];
                    theModel.ImageUrl = "~/Shared/Images/db78.png";
                    theModel.HasChildren = true;
                    theModel.Id = r["RegionId"].ToString();
                    regions.Add(theModel);
                }
                ViewBag.Regions = regions;

If anyone can point me in the right direction, it would be greatly appreciated.

Thanks,

John

1. It contains typos - for example _Layout.cshtml is called Layout.cshtml

2. It creates a webapp with a lot of extra stuff that I don't want. I like to start with a minimal app and then add features.

3. The relationship between Bootstrap and Kendo style sheets / js isn't clear. I expect to be able to apply a custom theme to my website that works with all the Kendo widgets, but my attempts to change theme result in badly presented components.

4. There isn't clear differentiation of documentation that is Kendo UI for .NET Core specific.

5. Kendo documentation is badly organised. I'm not even told what version of what product it was last tested on.

In order to resolve these problems I am proposing this thread as an alternative starting point for people who are new to Kendo UI for .NET Core. Perhaps someone would kindly write a better set of instructions than http://docs.telerik.com/aspnet-core/getting-started and then keep them up-to-date.

I've seen a couple of Telerik examples written for creating a Wizard using the TabStrip but using different technologies.  However, I have not had any luck with getting it to work in ASP.NET Core 2.2.  Each Tab should be a step in the process that loads a Partial View sharing 1 model.  The requirements are:

• Tab 1 I have a Hierarchy using your TreeItem control
• Tab 2 I have a Grid listing People
• Tab 3 I capture some data entry
• Tab 4 I submit the data that has been accumulated.

I'd appreciate your help with this,

Joel

Hello,

On my grid's toolbar I have a drop-down list box.  Within my grid I have a template column that displays the aggregate of three other columns.  When the user selects a value from the drop-down list box I want to filter the grid based on the value that's in the template column.  How do I achieve this?

Here's the code for "GridToolbarTemplate"

The following is my JavaScript for the toolbar and the template column:

Your help is appreciated.  Thanks.

Shawn A.

Can you help me understand this #: EmployeeId # syntax?  It seems that is a dynamic value fed in using binding in the TreeList.  But, it doesn't seem to work for me:

Your example from demos:

My instance that doesn't work:

My treelist is bound to a list of Groups.  On my Group object I have an Object named CurrentType that has a property on it called Name.  I want to base the Icon on the Group.CurrentType.Name.  So, for each group type I have a different Icon.

Thanks, Joel

Explain to me how I can work with the Selectable option.  I have 2 controls on a page.  On the left, I have a TreeList and on the right I have a Grid.  The TreeList contains a hierarchical list of groups for which the user is authorized.  I'm going to use this group selection to "filter" the data that will be displayed in the Grid control.  So, I need the selection of a group in the TreeList to prompt the refresh of the Grid which then must use the groupId of the selected TreeList's node.

1. On load, how can selection of a TreeList Node be set to a default group from a MVC Action? 
2. On selection, how can this value fire an event that will reload the Grid?

An example would be appreciated.  Thanks for your help,

Joel