I have server-side Blazon, all with many pages; some of them are mapped to the Context and some to API, and they are all fine. And then I have one very simple page that loads painfully slow with no visible explanation. The class of the page does not conflict with anything. The page has a simple, three-column grid bound to Context. The collection from Context is a dose items, and they come instantaneously. There is no multiple load or anything like that. So, what makes the grid paint itself so slowly? It does literally one grid’s row per 1-2 seconds. I did not see any distinction between this page and any others that are flying perfectly fast.
<RadzenDataGrid @ref="grid0" ColumnWidth="200px" AllowFiltering="true" FilterMode="FilterMode.Advanced" AllowPaging="false"
AllowSorting="true" ShowPagingSummary="true"
Data="@contactsTypesCount" TItem="VwContactsTypesCount"
Style="width: 900px; vertical-align: top; border: 1px solid #8e8b8b" AllowVirtualization="true" Density="Radzen.Density.Compact"
GridLines="Radzen.DataGridGridLines.Both">
<RadzenDataGridColumn TItem="VwContactsTypesCount" Property="Name" Title="Contact Type">
<Template Context="data">
<RadzenLabel Text="@data.Name" Style="color:lightgrey;font-family:Verdana; font-size: 16px; font-weight:bold" />
</Template>
</RadzenDataGridColumn>
<RadzenDataGridColumn TItem="VwContactsTypesCount" Property="Contacts" Title="Contacts">
<Template Context="data">
<RadzenLabel Text="@data.Contacts.ToString()" Style="color:lightgrey;font-family:Verdana; font-size: 16px; font-weight:bold" />
</Template>
</RadzenDataGridColumn>
<RadzenDataGridColumn TItem="VwContactsTypesCount" Property="Scoreable" Title="Scoreable" Width="100px" TextAlign="TextAlign.Center">
<Template Context="data">
<RadzenSwitch @bind-Value=@data.Scoreable Change=@(args => ServiceStatusOnChange(args, data)) Style="margin-top:7px;" />
</Template>
</RadzenDataGridColumn>
</Columns>