Using a <Select> element in a Datagrid<FilterTemplate>

[GilShalit]

Hi, can't find an example for this.

Tried:

<FilterTemplate>
    <Select TValue="int" SelectedValue="@((((FilterContext)context)?.SearchValue))" SelectedValueChanged="@OnSelectedValueChanged">
		@foreach (var v in valueDictionary)
			{
			 <SelectItem TValue="int" Value="@((int)v.Key)">@v.Value</SelectItem>
			}
    </Select>
</FilterTemplate>

where public Dictionary<int, string> valueDictionary { get; set; }

This does not compile with the message being there is a null object in the SelectItem definition row.

[stsrki]

Your Select type is TValue="int". While FilterContext SearchValue is object type. They must match.

<FilterTemplate>
    <Select TValue="int" SelectedValue="@(Convert.ToInt32(context.SearchValue))" SelectedValueChanged="@(e => context.TriggerFilterChange(e))">
        @foreach ( var v in valueDictionary )
        {
            <SelectItem TValue="int" Value="@((int)v.Key)">@v.Value</SelectItem>
        }
    </Select>
</FilterTemplate>

[GilShalit]

Thanks! You identified the problem obviously but actually is a string, so this works fine:

<Select TValue="string" SelectedValue="@(context.SearchValue)" SelectedValueChanged="@(e => context.TriggerFilterChange(e))">