<style>
    input.k-textbox.form-control,
    k-datetimepicker.form-control,
    .k-widget.k-combobox.k-header.form-control {
        height: calc(2.25rem) !important;
    }
</style>

<div class="container-fluid border pt-md-3">
    <div class="row">
        <h5 class="pl-3 pb-3">nach Geschäftsfall suchen</h5>
    </div>
    <EditForm Model="SuchParameter" OnValidSubmit="HandleValidSubmit">
        <DataAnnotationsValidator />
        <div class="row  mb-1">
            <div class="col-md-4">
                <label for="fallJahr">Fall-Jahr</label>
            </div>
            <div class="col-md-8">
                <TelerikNumericTextBox Id="fallJahrTelerik" @bind-Value="SuchParameter.Jahr" Class="form-control" Arrows="false" />
            </div>
        </div>
        <div class="row  mb-1">
            <div class="col-md-4">
                <label for="fallNummer">Fall-Nr.</label>
            </div>
            <div class="col-md-8">
                <TelerikTextBox Id="fallNummer" @bind-Value="SuchParameter.Nummer" Class="form-control" />
            </div>
        </div>

        <div class="row  mb-1">
            <div class="col-md-4">
                <label for="geschaeftsArt">Geschäftsart</label>
            </div>
            <div class="col-md-8">
                <TelerikComboBox Id="geschaeftsArt" ValueChanged="@( (string c) => OnGeschaeftsArtChanged (c))" Value="selectedGeschaeftsArt" ValueField="Art" TextField="Art" ValueExpression="@( () => selectedGeschaeftsArt )"
                                 Data="@GeschaeftsArten" Placeholder="Geschäftsart auswählen" ClearButton="true" Width="100%" 
                                 Class="form-control"/>
            </div>
        </div>
        <div class="row  mb-1">
            <div class="col-md-4">
                <label for="posteingang">Posteingang </label>
            </div>
            <div class="col-md-8">
                <TelerikDateTimePicker Id=posteingang @bind-Value="@selectedTime" Format="dd.MM.yyyy" Width="100%"
                                       Class="form-control"></TelerikDateTimePicker>
            </div>
        </div>

        <button type="submit" class="btn btn-block btn-primary">Suchen</button>
        <ValidationSummary />
    </EditForm>
</div>

@code{
    public class TheFormModel
    {
        public int Jahr { get; set; }
        public string Nummer { get; set; }
    }

    public class ComboModel
    {
        public string Art { get; set; }
    }

    TheFormModel SuchParameter { get; set; } = new TheFormModel();
    string selectedGeschaeftsArt { get; set; }
    List<ComboModel> GeschaeftsArten { get; set; } = Enumerable.Range(1, 5).Select(x => new ComboModel { Art = $"Art {x}" }).ToList();
    DateTime selectedTime { get; set; }

    void HandleValidSubmit()
    {

    }

    void OnGeschaeftsArtChanged(string v)
    {
        selectedGeschaeftsArt = v;
    }
}