Radzen multiselect dropdown default value

Radzen.Blazor Components
1

How to by default auto select all values if the multiselect dropdown data source is from database/dynamic?

2

You need to set the Value property accordingly - create a collection of all values you need to be selected. This is the only way to (pre)select values in the DropDown.

For example if you use the ValueProperty setting you need a collection of all values e.g.

<RadzenDropDown Data=@data @bind-Value=@value Multiple="true" TextProperty="Text" ValueProperty="Value" />

value = data.Select(i => i.Value); //Createa a collection of all values (the Value property represents the "value" of an item)

If you don't set ValueProperty just create a copy of the data:

<RadzenDropDown Data=@data @bind-Value=@value Multiple="true" TextProperty="Text"  />

value = data.ToList();
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