When can we expect a fix, all the workarounds proposed carry a large amount of technical debt, this issues was logged almost a year ago.

Hi,

Will this be fixed soon please as it is starting to become a blocking issue for us?

Thanks,

Mark

- Attached video

Doing same thing repetitively in video:

1 - load new page(pencil-edit)
2 - comboboxes are loaded and value bound at OnParametersSetAsync
3 * sometimes it shows OK
3 * sometimes it looks empty, but value is still the same (@CurrentEdit.CisloOrg etc)
4 - click inside combobox, TAB out - and value is here as it shoud be at pageload(1)
5 - GO BACK from page
6 -  goto 1
hope it helped

components version: 2.30.0

Hello,

 iam found similar, but not the same problem:

- combobox doesnt showing binded value(Visualy it seems empty), UNTIL you jump to the combobox input area and out(by the mouse cursor or run over by tab tab tab tab key).
- it is not happening all the time, but "randomly" according, how fast the page decide to render the components. Mostly when using NavigateTo and have lot(6 and more) combobxes on page.
- My fix was to put "waitfor delay '00:00:00.5'" (like await Task.Delay(...))to one of the many SQL calls.
- Because we dont know the "exact order" how blazor decid to call/load data in the ui, so workaround where to place "reasign value" is not 100% fix(but helped a little)
- doesnt matter if OnRead or Direct assign of datasource is used
- adding statehaschanged() to the OnParametersSetAsync didnt helped OR where is the only 1 correct place to be called ONCE)?

- two differently configuret comboboxes with same behavior(which is good for testing :) )
<TelerikComboBox Width="" @bind-Value="@CurrentEdit.CisloOrg"
ScrollMode="@DropDownScrollMode.Virtual"
Data="@CisOrg"
OnRead="@(args=>ReadComboData(args,6))"
ValueMapper="@GetSelValueComboboxOrg"
ItemHeight="30"
TotalCount="@CNT6"
PageSize="14"
PopupHeight="400px"
TextField="Nazev1"
ValueField="KeyValint"
Filterable="true"
FilterOperator="StringFilterOperator.Contains">
</TelerikComboBox>

<TelerikComboBox Width="" @bind-Value="@CurrentEdit.CisloStred"
Data="@CisStred"
ValueField="KeyVal"
TextField="Nazev1"
Filterable="true"
FilterOperator="StringFilterOperator.Contains">
</TelerikComboBox>


Code:
public IEnumerable<BaseKeyModel> CisStred { get; set; } = Enumerable.Empty<BaseKeyModel>();
public IEnumerable<BaseKeyModel> CisOrg { get; set; } = Enumerable.Empty<BaseKeyModel>();
....and much more sources....
protected override async Task OnParametersSetAsync()
{
//await base.OnParametersSetAsync();

if (lastp != did)
{
lastp = did;
IsBusy = true;

CisStred = await glob.SQL.QueryAsync<BaseKeyModel>(sql: "dbo.sqlprocedureXYZ");
..... and so on X TIMES once per every combobox on page....
...
.the last one to load - bind selected values:
CurrentEdit = await glob.SQL.QueryFirstOrDefaultAsync<EditRowModel>(sql: "dbo.sqlprocedureXYZ");

IsBusy = false;
}
}



async Task ReadComboData(ComboBoxReadEventArgs e, int xtyp)
{
try
{
var p = new DynamicParameters();
var f = SqlClass.GetSQLFiterString(e.Request);
p.AddDynamicParams(new

xWhere = f.xWhere,
xOrd = f.xOrd,
PageSize = e.Request.PageSize,
PageIndex = e.Request.Skip,
});

var r = await glob.SQL.QueryAsync<BaseKeyModel>(sql: "dbo.sqlprocedureXYZ", param: p, commandType: System.Data.CommandType.StoredProcedure);
if (xtyp == 3) {CisZak = r;  CNT3 = p.Get<int>("CNT"); }
if (xtyp == 6) { CisOrg = r; CNT6 = p.Get<int>("CNT");}
.....

}
}
catch (Exception ex)
{
Notification.ShowSQLErr(ex.Message);
}
}