CODEWITHSUNDEEP
drop-down-menublazorblazor-webassemblyradzen
Scooby
Scooby

Reputation: 13

Radzen Blazor DropDown on dynamic data from external API

I'm getting data from an external API and the code looks like this (this part is fine):

@code {
    IEnumerable<IDictionary<string, object>> data;
    int count;
    bool isLoading;

    async Task LoadData(LoadDataArgs args)
    {
        isLoading = true;
        var uri = new Uri("https://services.radzen.com/odata/Northwind/Employees")
            .GetODataUri(filter: args.Filter, top: args.Top, skip: args.Skip, orderby: args.OrderBy, count: true);

        var response = await new HttpClient().SendAsync(new HttpRequestMessage(HttpMethod.Get, uri));

        var result = await response.ReadAsync<ODataServiceResult<IDictionary<string, object>>>();

        data = result.Value.AsODataEnumerable();
        count = result.Count;
        isLoading = false;
    }
}

On the dropdown menu I want to display the EmployeeID, but cannot access it (the Data="@data.Employee.ID" is incorrect and not sure what to put in there to make it work).

<RadzenDropDown Data="@data.EmployeeID" TextProperty="EmployeeID" ValueProperty="EmployeeID" Name="Dropdown1" TValue="string">
            </RadzenDropDown>

Thanks!

Upvotes: 0

Views: 3132

Answers (2)

Eldar Zeynalov
Eldar Zeynalov

Reputation: 409

  1. Take this tutrial, you'll find the whole class in the end of the article https://www.c-sharpcorner.com/UploadFile/87b416/dynamically-create-a-class-at-runtime/#fromHistory

  2. AppDomain.CurrentDomain.DefineDynamicAssembly must be changed to AssemblyBuilder.DefineDynamicAssembly (in order to work with .net core and .net 5+)

  3. Example Code of the page. You'll loop on your Dictionary to t.GetProperty("UserID").SetValue(...

    @code { string value { get; set; } List data = new(); protected override async Task OnInitializedAsync() { MyClassBuilder MCB = new MyClassBuilder ("ClsUser"); var myclass = MCB.CreateObject(new string[4] { "UserID", "Username", "Birthday", "Location" }, new Type[4] { typeof(string), typeof(string), typeof(DateTime), typeof(string) }); Type t = myclass.GetType(); var obj = Activator.CreateInstance(t); t.GetProperty("UserID").SetValue(obj, "34", null); t.GetProperty("Username").SetValue(obj, "Albert", null); t.GetProperty("Birthday").SetValue(obj, new DateTime(1976, 3, 14), null); t.GetProperty("Location").SetValue(obj, "KRK", null); data.Add(obj); } }

Upvotes: 0

hesolar
hesolar

Reputation: 709

The problem is that the Data Property is:

 IEnumerable<IDictionary<string, object>> data;

It should be:

IEnumerable<Employee>data;

So then you can acess to Employee class properties.

<RadzenDropDown Data="@data.EmployeeID" TextProperty="EmployeeID" ValueProperty="EmployeeID" Name="Dropdown1" TValue="Employee">
            </RadzenDropDown>

Upvotes: 1

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