Immediately Changing Value after item is modified in Select

Describe the bug

A clear and concise description of what the bug is.

RuleGroup ruleGroupToSelect = null;
ruleGroupToSelect = new()
{
    GroupName = this.NewGroupName
};
this.RuleGroups.Add(ruleGroupToSelect);
this.SelectedGroup = ruleGroupToSelect;

Where this.SelectedGroup has already bound to Value of Select. SelectOptions loop through the list this.RuleGroups. After the last assignment, Select shows nothing.

Steps to reproduce (please include code)

Do something as described in the code above.

Exceptions (if any)

no.

Further technical details

• AntDesign Nuget Package version - 0.8.0
• Include the output of dotnet --info - .NET 5.0
• The IDE (VS / VS Code/ VS4Mac) you’re running on, and it’s version - not relevant.

[anddrzejb]

I haven’t really started working on this (I am pretty swamped lately), but the behaviour is not really surprising. Select is async when it comes to populating its content (the select items). The selected value has to exist in the list of select item. Your original code was synchronous. I am afraid this issue might not be fixable, however I do plan to have a more thorough look.

[anddrzejb]

@Banyc Thanks for waiting! I haven’t really looked deep into this issue, but if you switch this:

    private void OnAddItem()
    {
        var newModel = new MyModel()
        {
            Name = this.NewName
        };
        this.Models.Add(newModel);
        // make the select display the new item
        this.SelectedModel = newModel;
    }

with this

    private async Task OnAddItem()
    {
        var newModel = new MyModel()
        {
            Name = this.NewName
        };
        this.Models.Add(newModel);
        await Task.Yield();
        // make the select display the new item
        this.SelectedModel = newModel;
    }

It should start working. Obvious first impression is that there is an async operation pending in-between your synchronous changes. Since async operation has no chance of completing, second operation (assignment of the new value), does not seem to work. I will have a closer look, but if you need it quickly, this is the immediate solution. Mind, this might be final as well, but I will get back to you on this subject.