This works if you uncoment the AsIQueryable():
@page "/"
@inherits IndexComponent
@layout MainLayout
<RadzenDropDownDataGrid TValue="int" FilterCaseSensitivity="FilterCaseSensitivity.CaseInsensitive"
AllowFiltering="true" AllowClear="true" Data="@countries" Change="@Change"
TextProperty="Name" ValueProperty="Id" @bind-Value="@selectedCountry" />
@code {
public class Country2
{
public int Id { get; set; }
public string Name { get; set; }
}
int selectedCountry = 1;
IEnumerable<Country2> countries;
protected override async Task OnInitializedAsync()
{
countries = new Country2[] {
new Country2 { Id = 1, Name = "Country1" },
new Country2 { Id = 2, Name = "Country2" },
};//.AsQueryable();
}
void Change(object value)
{
}
}
but if not it fails with:
Error: System.InvalidOperationException: The binary operator Equal is not defined for the types 'System.Object' and 'System.Int32'.
at System.Linq.Expressions.Expression.GetEqualityComparisonOperator(ExpressionType binaryType, String opName, Expression left, Expression right, Boolean liftToNull)
at System.Linq.Expressions.Expression.Equal(Expression left, Expression right, Boolean liftToNull, MethodInfo method)
at System.Linq.Expressions.Expression.Equal(Expression left, Expression right)
at System.Linq.Dynamic.Core.Parser.ExpressionHelper.GenerateEqual(Expression left, Expression right)
at System.Linq.Dynamic.Core.Parser.ExpressionParser.ParseComparisonOperator()
at System.Linq.Dynamic.Core.Parser.ExpressionParser.ParseLogicalAndOrOperator()
at System.Linq.Dynamic.Core.Parser.ExpressionParser.ParseIn()
at System.Linq.Dynamic.Core.Parser.ExpressionParser.ParseAndOperator()
at System.Linq.Dynamic.Core.Parser.ExpressionParser.ParseOrOperator()
at System.Linq.Dynamic.Core.Parser.ExpressionParser.ParseLambdaOperator()
at System.Linq.Dynamic.Core.Parser.ExpressionParser.ParseNullCoalescingOperator()
at System.Linq.Dynamic.Core.Parser.ExpressionParser.ParseConditionalOperator()
at System.Linq.Dynamic.Core.Parser.ExpressionParser.Parse(Type resultType, Boolean createParameterCtor)
at System.Linq.Dynamic.Core.DynamicExpressionParser.ParseLambda(ParsingConfig parsingConfig, Boolean createParameterCtor, ParameterExpression[] parameters, Type resultType, String expression, Object[] values)
at System.Linq.Dynamic.Core.DynamicExpressionParser.ParseLambda(ParsingConfig parsingConfig, Boolean createParameterCtor, Type itType, Type resultType, String expression, Object[] values)
at System.Linq.Dynamic.Core.DynamicQueryableExtensions.Where(IQueryable source, ParsingConfig config, String predicate, Object[] args)
at Radzen.Blazor.RadzenDropDownDataGrid`1.SelectItemFromValue(Object value)
at Radzen.DropDownBase`1.OnParametersSetAsync()
at Microsoft.AspNetCore.Components.ComponentBase.CallOnParametersSetAsync()
at Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync()
