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[parentComponent.razor]
<SfDropDownList
@ref="DdlObj" Value="@Value" ValueChanged="ValueChanged" ValueExpression="@ValueExpression" TValue="TVal" TItem="TItemss" ShowClearButton="true" Placeholder="e.g.
Australia" DataSource="@Country">
<DropDownListFieldSettings Value="@FieldValue" Text="@FieldText"></DropDownListFieldSettings>
</SfDropDownList>
@code
{
SfDropDownList<TVal, TItemss> DdlObj;
[Parameter]
public List<TItemss> Country { get; set; }
private TVal _value { get; set; }
[Parameter]
public string ID { get; set; }
[Parameter]
public string FieldText { get; set; }
[Parameter]
public string FieldValue { get; set; }
[Parameter]
public string Text
{
get;set;
}
[Parameter]
public Expression<Func<TVal>> ValueExpression
{ get; set; }
[Parameter]
public TVal Value
{
get => _value;
set
{
if (!EqualityComparer<TVal>.Default.Equals(value, _value))
{
_value = value;
var propertyType = typeof(TVal);
TItemss getObject =
Country.Where(item => Equals(item.GetType().GetProperty(FieldValue).GetValue(item),
value)).FirstOrDefault();
this.Text = (string)getObject.GetType().GetProperty(FieldText).GetValue(getObject);
ValueChanged.InvokeAsync(value);
}
}
}
[Parameter]
public EventCallback<TVal> ValueChanged { get; set; }
public MyClass MyObject = null!;
}
[chaildComponent.razor]
<CustomTextbox TVal="string"
FieldText="Descrizione"
FieldValue="Codice"
TItemss="ListClass" Text="@MyObject.MySelectedDescrizione" Country="@MyObject.MyDataSource" @bind-Value="@MyObject.MySelectedCodice"></CustomTextbox>
@code {
public MyClass MyObject = null!;
protected override Task OnInitializedAsync()
{
MyObject = new MyClass
{
MyDataSource = new List<ListClass>
{
new ListClass { Codice = "C001",
Descrizione = "Text 01"},
new ListClass { Codice = "C002",
Descrizione = "Text 02"},
new ListClass { Codice = "C003",
Descrizione = "Text 03"},
}
};
MyObject.MySelectedCodice = "C002";
return base.OnInitializedAsync();
}
}
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