Radzen DataGrid: Multiple Access to RenderFragment Columns collection

Radzen.Blazor Components
1

Hi, all. I'm working on an example that uses a DataGrid component to show some tabular data.
Columns are dynamically generated as in the Components Demo example, via a method like:

void prepareColumnRenderFragment()
{
_columnRenderFragment = ......... // dynamically generated
}

Later in the markup i've some code like:

<RadzenDataGrid @ref="grid" Data="@GetData()" TItem="IDataRow" @bind-Value="selectedRows" RowSelect="RowClicked" SelectionMode="DataGridSelectionMode.Single" FilterMode="FilterMode.Simple" AllowFiltering="true" AllowPaging="true" AllowSorting="true" ColumnWidth="200px">

@GetColumns()

the GetColumns method returns the previously generated render fragment stored in private field "_columnRenderFragment"

I've noticed that the GetColumns method is called multiple time when doing the rendering without anything external component triggering a render cycle.

Is this by design ?

2

Hi @Bruno_Giavotto,

The DataGrid will automatically reload itself on the first render. You can attach the source code of Radzen.Blazor to your project to check what and when will be executed.

3

Hi, Thanks for you reply. I've downloaded the nuget package of RadzenControls however i do not know how to attach the source code to see what's happening. Can you point me in the right direction?

4

The source code is in our repo, not in the NuGet package: