Dynamically adding a OnValueSelect results in the list text not being rendered properly

[Richard Kiernan]

Not sure if this is a bug or I'm missing something in when builder the rendertree but when trying to add a dynamically created combobox the combobox renders and binds to the data but the text values all appear to be empty. Here's a sample code fragment i'm using:

I should add that the event is being called fine - but nothing is show for each item in the bound list, it also appears that if I switch the render order so the field setting are rendered after the event call back then the combo displays correctly but the event never fires.

I've  also discovered that if I swap the childcontent section in debug with a hot reload it works as expected

Thanks

var propInfoValue = o.GetType().GetProperty(propertyInfo.Name);

var constant = System.Linq.Expressions.Expression.Constant(o, o.GetType());

var exp = System.Linq.Expressions.MemberExpression.Property(constant, propertyInfo.Name);

builder.OpenComponent(0, typeof(Syncfusion.Blazor.DropDowns.SfComboBox));

builder.AddAttribute(1, "DataSource", sharedLookup.GetItems());

var defaultValue = propInfoValue.GetValue(o);

builder.AddAttribute(2, "Value", defaultValue);

builder.AddAttribute(3, "PlaceHolder", DisplayName);

builder.AddAttribute(4, "FloatLabelType", FloatLabelType.Always);

builder.AddAttribute(5, "ChildContent", (Microsoft.AspNetCore.Components.RenderFragment)((fieldSettingBuilder) =>

{

fieldSettingBuilder.OpenComponent(1);

fieldSettingBuilder.AddAttribute(2, "Value", "ID");

fieldSettingBuilder.AddAttribute(3, "Text", "Name");

fieldSettingBuilder.CloseComponent();

}));

builder.AddAttribute(6, "ChildContent", (Microsoft.AspNetCore.Components.RenderFragment)((builderComboBoxEvents) =>

{

builderComboBoxEvents.OpenComponent>(1);

builderComboBoxEvents.AddAttribute(2, "OnValueSelect", EventCallback.Factory.CreateLookupEntry >>(this, ((e) => OnValueSelect(e))));

builderComboBoxEvents.CloseComponent();

}));

builder.CloseComponent();

[Sureshkumar P]

Hi Richard,

You can achieve your requirement by using the below code example on your application.

Find the code example here:

 

                                              b.AddAttribute(10, "ChildContent", (RenderFragment)(b2 =>

                                              {

                                                    b2.OpenComponent<ComboBoxEvents<string, ComboData>>(11);

                                                    b2.AddAttribute(12, "OnValueSelect", Microsoft.AspNetCore.Components.CompilerServices.RuntimeHelpers.TypeCheck(EventCallback.Factory.Create<SelectEventArgs<string>>(this, DropDownChange)));

                                                    b2.CloseComponent();

 

                                                    b2.OpenComponent<ComboBoxFieldSettings>(13);

                                                    b2.AddAttribute(14, "Value", "DisplayValue");

                                                    b2.CloseComponent();

 

                                              }));

 

                                          b.CloseComponent();

                                          b.CloseElement();

                                       };

Regards,

Sureshkumar P

[Richard Kiernan]

Perfect thanks

R