Questions on UI for Blazor Forum

1 answer

360 views

[Solved] Telerik in Blazor Server vs WASM

Hello,

This v2.26.0 drop down:

        <div class="flex-child">
            <label for="warehouse" class="k-label k-form-label">Warehouse</label>
            <TelerikDropDownList Data="@Warehouses" DefaultText="Select a Warehouse"
                                 Id="warehouse"
                                 TextField="WarehouseName"
                                 ValueField="WarehouseId"
                                 ValueChanged="@((int w) => WarehouseSelected(w))" />
        </div>

...is working in a Blazor WASM app (well, I'm having issues overriding css classes used by Telerik controls, but that's another topic).

Here it is, working OK in Blazor WASM:

However, using the same code in a Razor component in a Blazor-Server project, I am not getting the control rendered properly:

I have your script declared in the head part of _Host.cshtml (see below). I'm really not sure about this, and I have moved it around , removed "defer", deleted bin and obj folders and cleared the cache, but to no avail.

<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>CalendarDemo.UI</title>
    <base href="~/" />
    <link rel="stylesheet" href="css/bootstrap/bootstrap.min.css" />
    <link href="css/site.css" rel="stylesheet" />
    <link href="CalendarDemo.UI.styles.css" rel="stylesheet" />
    <link href="css/CustomStyles.css" rel="stylesheet" />
    <script src="_content/Telerik.UI.for.Blazor/js/telerik-blazor.js" defer></script>

</head>

Looking at the dev tools, I do see the above script is making it to the page:

This is a mystery to me so far. I am not seeing any exceptions being raised.

Any suggestions for further troubleshooting? Thanks again!

DropDownList

General Discussions

answered on 17 Aug 2021

5 answers

893 views

Limiting the calendar to only select from today forward (no past-date selection)

Is there a way to prevent the user from selecting dates in the past?

When the current month is shown, I assume I need to create a List<DateTime> containing all the dates in the current month that are in the past and assign that List to the calendar's DisabledDates. If there is another way, please advise.

The other part of this question is: How we prevent the user from even viewing past months?

Thanks a lot!

Calendar

answered on 17 Aug 2021

1 answer

2.4K+ views

Add Link in Grid to Navigate to Product Details Page

Hi:

I'm new to Telerik for Blazor and was hoping to create a column of links in a Products Grid that would bring the user to the Product Details page for the particular link. In particular, I want to go the the @page "/productdetails/{ProductId}"

I'm assuming the best method is with a template? Here's what I have so far:

<GridColumns>
    <GridColumn Field="ProductId" Title="Id" />
    <GridColumn Field="Product" Title="User" />
    <GridColumn>
        <Template>
            @{
                <div><a href="#" @onclick="">Product Details</a></div>
                //onclick go to product details page and pass parameter
            }
        </Template>
    </GridColumn>
</GridColumns>

@page "/productdetails/{ProductId}"

Any help greatly appreciated.

Grid

answered on 17 Aug 2021

1 answer

570 views

Add DateRangePicker to a DropDownList in ToolBarTemplateItem

Hi,

I need to have a DateRangePicker to allow a user to select a date range in the Toolbar. Ideally, I want to implement this in a DropDownList with the Placeholder text of "All Dates". When the drop down list is clicked, the DateRangePicker is shown and a user can select a range of dates which will then show after focus is lost. The user should be able to select "All Dates" again so no "date range" is selected to send to my API. See attached screen show. Any help is much appreciated!

Jimmy

<ToolBarTemplateItem>
<TelerikDropDownList Data="@dateLookupModel" TextField="LookupTextField" ValueField="LookupValueField" @bind-Value="@dateLookupType" width="125px"></TelerikDropDownList>
</ToolBarTemplateItem>
<ToolBarSeparator />
<ToolBarTemplateItem>
Dates: <TelerikDateRangePicker Class="daterangepicker-no-labels" @bind-StartValue="@StartValue"
@bind-EndValue="@EndValue"></TelerikDateRangePicker>
</ToolBarTemplateItem>
<ToolBarSeparator />

Code:

public DateTime? StartValue { get; set; } = new DateTime(DateTime.Today.Year, DateTime.Today.Month, DateTime.Today.Day);

public DateTime? EndValue { get; set; } = new DateTime(DateTime.Today.Year, DateTime.Today.Month, DateTime.Today.Day);

private FilterDate dateLookupType { get; set; } = FilterDate.AllDates;

private List<LookupItemModel<FilterDate>> dateLookupModel { get; set; } =
new();

foreach (var value in Enum.GetValues(typeof(FilterDate)))
{
dateLookupModel.Add(new LookupItemModel<FilterDate>()
{
LookupTextField = ((FilterDate)value).GetAttribute<DisplayText>().Text,
LookupValueField = (int)value,
LookupSortValue = ((FilterDate)value).GetAttribute<OrderAttribute>().Order
});
dateLookupModel.Sort((x, y) => x.LookupSortValue.CompareTo(y.LookupSortValue));
}

DateRangePicker

DropDownList

answered on 14 Aug 2021

3 answers

804 views

[Solved] Fill Splitter to remaining height of screen

Hi.

I'm trying to make a TelerikSplitter control fill the remaining height of the screen, but I'm struggling with making it work as expected.

Index.razor

@page "/"

<TelerikSplitter Orientation="SplitterOrientation.Horizontal">
    <SplitterPanes>
        <SplitterPane Resizable="true" Collapsible="false">
            Left
        </SplitterPane>
        <SplitterPane Resizable="true" Collapsible="false">
            Right
        </SplitterPane>
    </SplitterPanes>
</TelerikSplitter>

Any ideas?

Thank you.

Splitter

answered on 14 Aug 2021

1 answer

451 views

Why is css order different in published app?

Hello,

This might be a Blazor issue and not Telerik, but I don't know yet. I have a TelerikCalendar in a Blazor component (.razor page). I added a style tag to the page after the @using directives.

One of the styles I added was:

.k-calendar .k-state-selected .k-link {
background-color: #009966;
}

This works when the app is hosted by IIS Express in VS 2019 (see image "1" below). However, if it is hosted by Kestrel or published to my machine's IIS, the order of the css gets changed, and my local style gets overruled (see image "2" below).

Any ideas? Thanks!

1. IIS Express (my local css "green" gets applied):

2. IIS-hosted (my local css "green" gets overruled by what I guess is the control's default "orange" styling?):

Calendar

answered on 13 Aug 2021

1 answer

1.1K+ views

Is there a ReadOnly toggle for Grid?

I know each column has an "Editable" property, but I was hoping there was something that could put the whole grid in read-only mode.

Am I missing something, or is that simply not feasible?

Thanks,

Grid

answered on 13 Aug 2021

1 answer

589 views

[Solved] Changing the Scale/Vertical Axis labels on a column chart to only show whole numbers?

Is there a way to change the Vertical Axis labels in a Chart column graph to only show whole numbers instead of fractional numbers?

Charts

answered on 13 Aug 2021

1 answer

215 views

Move chart axis labels to bottom without changing the axis display

I would like to display the x date category axis at the bottom. However if I set the AxisCrossingValue then it changes the bar display to appear as if it comes from the bottom. I would like to display the exact same chart however just the date labels at the bottom and leave the 0 axis line where it currently is.

Charts

answered on 13 Aug 2021

1 answer

779 views

[Solved] Example of Grid populated by real remote source and HttpClient

I have struggled for years with foo bar examples and Telerik Documentation that does not contain any examples acquiring the data for a Grid that does not assume that you are using jsonp or odata. I am trying to populate a Blazor Grid with data from a simple REST API over which I have no control.

Do you have any examples that show this? I haven't been able to find any.

I would like to to be able to capture the data from the remote API (e.g. metaweather) and use that data to populate the grid. Here's an example of a demo Blazor app where I populate an html table using that API:

page "/weather"
@using System.Net.Http.Json

@inject IHttpClientFactory _clientFactory

<h3>WeatherData</h3>

@if (string.IsNullOrWhiteSpace(errorString) == false)
{
    <h2 style="color: red;">@errorString</h2>

}
else if (forecast is null)
{
    <div class="h4">Loading...</div>
}
else
{
    <table class="table table-stripped">
        <thead class="thead-dark">
            <tr>
                <th>Date</th>
                <th>Weather State</th>
                <th>Low</th>
                <th>High</th>
            </tr>
        </thead>
        <tbody>
            @foreach (var w in forecast.consolidated_weather)
            {
                <tr>
                    <td>@w.applicable_date </td>
                    <td>@w.weather_state_name </td>
                    <td>@w.min_temp </td>
                    <td>@w.max_temp </td>
                </tr>
            }
        </tbody>>
    </table>


}

@code {

    VancouverForecast forecast;
    string errorString;

    protected override async Task OnInitializedAsync()
    {
        var request = new HttpRequestMessage(HttpMethod.Get, "https://www.metaweather.com/api/location/9807");
        var client = _clientFactory.CreateClient();

        HttpResponseMessage response = await client.SendAsync(request);

        if (response.IsSuccessStatusCode)
        {
            forecast = await response.Content.ReadFromJsonAsync<VancouverForecast>();
            errorString = null;
        }
        else
        {
            errorString = $"There was an error getting our forecast: {response.ReasonPhrase}()";
        }
    }
}

My eventual goal is to create a properly structured app with separation of concerns doing this sort of thing. Anything you could point me to to assist me in that goal would be greatly appreciated.

General Discussions

Grid

updated answer on 12 Aug 2021