Questions on UI for ASP.NET Core Forum

2 answers

498 views

Disable Parent Selection

Is there a way to disable parent selection? I only want the user to be able to select one child node.

DropDownTree

answered on 02 Apr 2019

1 answer

67 views

HtmlHelper Encouraged/Discouraged?

It seems from your examples and from the dojo tool that the use of the HtmlHelper isn't the preferred way to do things. Can someone who knows which way this ship is sailing comment on your direction? Is this the preferred way? If not, what is the preferred way?

General Discussions

answered on 02 Apr 2019

1 answer

164 views

ASP.NET Core 3.0 Upgrades

With the introduction of Visual Studio 2019 and the significant work put in to Core 3.0 what is the compelling reason to move except to just be on the latest? Are there new controls or new framework features I should be aware of for ASP.NET Core MVC development that'd prompt me to get there sooner than later?

General Discussions

answered on 02 Apr 2019

1 answer

270 views

Use a template from another file similar to the way that EditorTemplates are sourced

Hello,

When the edit mode is used for other controls, we are given the option to select a template that resides inside of the ~/Views/Shared/EditorTemplates/ folder.I would like to be able to select a template that would be used to display each of the records for this control as well instead of relying on .ClientTemplateId(). Is this currently possible?

For instance, I would like to be able to select the template located at ~/Views/Shared/Templates/ChannelCard.cshtml by doing the following:

@(Html.Kendo().ListView<NotificationSystem.Data.Models.ChannelCard>()

.Name("channels")

.TagName("ul")

.TemplateName("ChannelCard")

.DataSource(dataSource => dataSource

.Ajax()

.Read(read => read.Action("Read", "Channels").Data("bindSearch"))

.PageSize(20)

)

.Pageable()

.HtmlAttributes(new {@class = "channel-list"})

.Deferred()

)

ListView

answered on 01 Apr 2019

1 answer

166 views

Want field display different than filtered results

I am working with AutoComplete in a grid cell. I need the dropdown display for the filter to be different than the value that populates the field once a value is selected. The stored procedure that returns the values to be searched/filtered combines several fields so the users can filter several fields at once. However, I don't want the final selected value displayed to be that field but another shortened field. In my example, the filtering is done on a combination of "ProjectNumber" and "ProjectName" while the final selected value displayed should only be the ProjectNumber.

This isn't an issue once the user presses the Bulk Save button on the grid as the read returns only the ProjectNumber for the grid field but I need to display only the ProjectNumber once an autocomplete value is selected.

@(Html.Kendo().AutoComplete()

.Name("")

.Filter(FilterType.Contains)

.DataTextField("ProjectLookup")

.Value("ProjectKey")

.ValuePrimitive(true)

.Placeholder("Select...")

.Template("#= ProjectNumber # | #= ProjectName #")

.AutoWidth(true)

.MinLength(1)

.DataSource(dataSource =>

{

dataSource.Ajax();

dataSource.Read(read =>

{

read.Action("ProjectAutoComplete_Read", "Timecard").Data("projectAutoCompleteRead");

})

.ServerFiltering(false);

})

.Events(events => events

.Select("projectAutoComplete_OnSelect")

.Filtering("projectAutoComplete_OnFiltering")

.Change("projectAutoComplete_OnChange")

)

AutoComplete

answered on 01 Apr 2019

10 answers

1.4K+ views

Json Serialization Breaks Grid

I've just set up a grid using ASP.NET core, and the controller method to return data is called, but no data is displayed by the grid. Looking at the JSON returned in Fiddler, it seems the field name cases have been changed by the serializer to be camel case, with the first letter always being lower case.

As the field names of the table are uppercase, this means they aren't being picked up by the grid. The only other option is to serialize as snake case, which doesn't help.

How can this be handled?

Grid

answered on 01 Apr 2019

4 answers

955 views

View model reset/broken with IValidatableObject

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:

1.public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)

2.{

3. if (OutageStart < DateTime.Now)

4. {

5. yield return new ValidationResult("Outage Date / Time cannot appear in the past", new[] { "OutageStart" });

6. }

7.}

Date/Time Pickers

answered on 28 Mar 2019

2 answers

232 views

Popup window scrolls to top of window

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?

Grid

answered on 27 Mar 2019

2 answers

127 views

Results not being displayed in cascading MultiSelectComboBox in Grid

I have a grid:

@(Html.Kendo().Grid(Model.Lines)

.Name("lines")

.Columns(columns =>

{

columns.Bound(p => p.Item).ClientTemplate("#= (Item.Name) ? Item.Name : '' #");

columns.Command(command => command.Destroy());

})

.ToolBar(tools =>

{

tools.Excel();

tools.Pdf();

tools.Save().HtmlAttributes(new { style = "float:right" });

tools.Create().HtmlAttributes(new { style = "float:right" });

})

.AllowCopy(true)

.Excel(excel => excel.FileName("LinesExport.xlsx"))

.Editable(editable => editable.Mode(GridEditMode.InCell))

.Navigatable()

.Sortable()

.Filterable()

.DataSource(dataSource => dataSource

.Ajax()

.Model(model =>

{

model.Id(i => i.Id);

model.Field(i => i.Id).Editable(false);

model.Field(i => i.ItemId).Editable(false);

model.Field(i => i.Item).Editable(true).DefaultValue(new Item { ItemId = "", ItemGroup = "", Name = "", SearchName = "" });

})

.Batch(true)

.ServerOperation(false)

)

with a custom editor on a field:

@model Item

@(Html.Kendo().MultiColumnComboBoxFor(m => m)

.Placeholder("Select item")

.DataTextField("Name")

.DataValueField("ItemId")

.Columns(columns =>

{

columns.Add().Field("ItemId").Title("Item Number").Width("180px");

columns.Add().Field("Name").Title("Name").Width("180px");

columns.Add().Field("SearchName").Title("Search Name").Width("180px");

columns.Add().Field("ItemGroup").Title("Item Group").Width("180px");

})

.Filter(FilterType.Contains)

.FooterTemplate("Total #: instance.dataSource.total() # items found")

.Height(400)

//.Events(events => events.Change("onComboBoxChange"))

.DataSource(source => source

.Read(read =>

{

read.Action("GetItems", "Home").Data("getItemsData");

})

.ServerFiltering(false)

)

.CascadeFrom("CustomerId")

)

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?

General Discussions