Strange Environment After Add New Row

[Dario Concilio]

Hi to all,

I have a simple grid, that I'm using with MVVM pattern.

<Style x:Key="ListEditableFlatStyle" TargetType="telerik:RadGridView" BasedOn="{StaticResource RadGridViewStyle}">
    <Setter Property="CanUserDeleteRows" Value="True"/>
    <Setter Property="CanUserFreezeColumns" Value="True"/>
    <Setter Property="CanUserInsertRows" Value="True"/>
    <Setter Property="CanUserReorderColumns" Value="False"/>
    <Setter Property="CanUserResizeColumns" Value="True"/>
    <Setter Property="CanUserResizeRows" Value="False"/>
    <Setter Property="CanUserSelect" Value="True"/>
    <Setter Property="CanUserSortColumns" Value="False"/>
    <Setter Property="CanUserSortGroups" Value="False"/>
    <Setter Property="ShowGroupPanel" Value="False"/>
    <Setter Property="ShowSearchPanel" Value="False"/>
    <Setter Property="AutoGenerateColumns" Value="False"/>
    <Setter Property="IsReadOnly" Value="False"/>
    <Setter Property="SelectionMode" Value="Extended"/>
    <Setter Property="SelectionUnit" Value="FullRow"/>
    <Setter Property="IsLocalizationLanguageRespected" Value="False"/>
    <Setter Property="Margin" Value="2"/>
    <Setter Property="NewRowPosition" Value="Bottom"/>
    <Setter Property="GroupRenderMode" Value="Flat"/>
</Style>

<telerik:RadGridView ItemsSource="{Binding MisureModelli}" Style="{StaticResource ListEditableFlatStyle}"
                     GroupRenderMode="Flat"
                     Grid.Row="6" Grid.ColumnSpan="4">
    <telerik:RadGridView.Columns>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding PesoLordo, StringFormat=\{0:N2\}}" Header="Peso Lordo (Kg)" HeaderTextAlignment="Right"
                        TextAlignment="Right"/>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding PesoNetto, StringFormat=\{0:N2\}}" Header="Peso Netto (Kg)" HeaderTextAlignment="Right"
                        TextAlignment="Right"/>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding Volume, StringFormat=\{0:N3\}}" Header="Volume (m³)" HeaderTextAlignment="Right"
                        TextAlignment="Right" IsReadOnly="True"/>
    </telerik:RadGridView.Columns>
</telerik:RadGridView>

 

When I click "new row", it disappears exists row, I don't undestrand why.

[Dilyan Traykov]

Hello,

I've tried to reproduce the issue you've described based on the provided information, but was, unfortunately, unable to do so. I'm attaching a sample project to demonstrate my approach.

Could you please have a look at it and let me know whether I'm missing something of importance and what modifications I should make in order to replicate it at my end as well?

Thank you in advance for your cooperation on the matter.

Regards,
Dilyan Traykov
Telerik by Progress

[Dario Concilio]

I found the problem, I've wrong overring of Equals and GetHashCode of model, the primary key of model consists of two fields, and not one.

01.//WRONG OVERRIDES
02.public override bool Equals(object obj)
03.{
04.    var other = obj as MisuraModelloModel;
05.    return other != null && other.CodiceModelloCommerciale == this.CodiceModelloCommerciale;
06.}
07.
08.public override int GetHashCode()
09.{
10.    if (CodiceModelloCommerciale != null)
11.        return CodiceModelloCommerciale.GetHashCode();
12.    else
13.        return -1;
14.}
15.
16.//CORRECT OVERRIDES
17.public override bool Equals(object obj)
18.{
19.    var other = obj as MisuraModelloModel;
20.    return other != null &&
21.           ((other.CodiceModelloCommerciale == this.CodiceModelloCommerciale) &&
22.            (other.NumeroCollo == this.NumeroCollo));
23.}
24.
25.public override int GetHashCode()
26.{
27.    if (CodiceModelloCommerciale != null)
28.        return $"{CodiceModelloCommerciale}.{NumeroCollo}".GetHashCode();
29.    else
30.        return -1;
31.}