Seems like DropDownDataGrid still does not select item on initial value set using @bind-Value #417

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claunia · 2026-01-29T17:36:58Z

claunia commented

2026-01-29 17:36:58 +00:00

Originally created by @OndrejUzovic on GitHub (May 19, 2022).

In version 3.18.10, if @bind-Value is used in DropDownDataGrid the value is not displayed.

@page "/"

@using Radzen;
@using Radzen.Blazor;
@using System.Linq.Dynamic.Core
@using System.Collections

<div style="width:700px; height:500px; background-color:beige;">

    <RadzenDropDownDataGrid TValue="string" @bind-Value=myCurrentValue LoadData="@OnLoadData" AllowClear="true"
                            Data=@myCustomCustomersData Count="@myCount"
                            TextProperty="CompanyName" ValueProperty="CustomerID" />

</div>

@code {
    public class Customer
    {
        public string CustomerID { get; set; }
        public string CompanyName { get; set; }
    }

    IEnumerable myCustomersDb;
    
    int myCount;
    IEnumerable myCustomCustomersData;
    string myCurrentValue;


    protected override void OnInitialized()
    {
        var tmpCustomers = new List<Customer>();
        for (int i = 0; i < 100; ++i)
        {
            tmpCustomers.Add(new Customer() { CustomerID = i.ToString(), CompanyName = $"Name {i}" });
        }

        myCurrentValue = "80";
        myCustomersDb = tmpCustomers;
    }


    void OnLoadData(LoadDataArgs args)
    {
        var query = myCustomersDb.AsQueryable();

        myCount = query.Count();

        if (args.Skip != null)
        {
            query = query.Skip(args.Skip.Value);
        }

        if (args.Top != null)
        {
            query = query.Take(args.Top.Value);
        }

        myCustomCustomersData = query;

        InvokeAsync(StateHasChanged);
    }
}

Or is this intended behavior?

Originally created by @OndrejUzovic on GitHub (May 19, 2022). In version 3.18.10, if @bind-Value is used in DropDownDataGrid the value is not displayed. ![image](https://user-images.githubusercontent.com/55758368/169276469-81261822-93d1-44a2-ab3f-7601b5bdb303.png) ``` @page "/" @using Radzen; @using Radzen.Blazor; @using System.Linq.Dynamic.Core @using System.Collections <div style="width:700px; height:500px; background-color:beige;"> <RadzenDropDownDataGrid TValue="string" @bind-Value=myCurrentValue LoadData="@OnLoadData" AllowClear="true" Data=@myCustomCustomersData Count="@myCount" TextProperty="CompanyName" ValueProperty="CustomerID" /> </div> @code { public class Customer { public string CustomerID { get; set; } public string CompanyName { get; set; } } IEnumerable myCustomersDb; int myCount; IEnumerable myCustomCustomersData; string myCurrentValue; protected override void OnInitialized() { var tmpCustomers = new List<Customer>(); for (int i = 0; i < 100; ++i) { tmpCustomers.Add(new Customer() { CustomerID = i.ToString(), CompanyName = $"Name {i}" }); } myCurrentValue = "80"; myCustomersDb = tmpCustomers; } void OnLoadData(LoadDataArgs args) { var query = myCustomersDb.AsQueryable(); myCount = query.Count(); if (args.Skip != null) { query = query.Skip(args.Skip.Value); } if (args.Top != null) { query = query.Take(args.Top.Value); } myCustomCustomersData = query; InvokeAsync(StateHasChanged); } } ``` Or is this intended behavior?

claunia closed this issue

2026-01-29 17:36:58 +00:00

claunia commented

2026-01-29 17:36:58 +00:00

@enchev commented on GitHub (May 20, 2022):

Hi @OndrejUzovic,

Since the item is not part of the current page (the main purpose of this component is to page lookup data unlike DropDown where all data are available at once) you can help by setting SelectedItem property like this:

@enchev commented on GitHub (May 20, 2022): Hi @OndrejUzovic, Since the item is not part of the current page (the main purpose of this component is to page lookup data unlike DropDown where all data are available at once) you can help by setting SelectedItem property like this: ![image](https://user-images.githubusercontent.com/5804953/169478329-ab647db4-16b4-4b57-b682-16ce135c355a.png) ![image](https://user-images.githubusercontent.com/5804953/169478345-70f9f80f-f851-45f4-8e1c-80d14cad2442.png)

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Reference: starred/radzen-blazor#417