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formating numbers in groupfootertemplate

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Maurice
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Maurice asked on 02 Mar 2021, 10:55 AM

Hi,

How can I format the resulting data. I want to only show a rounded value.

So 10.123456 hours will be 10 hours.

 

Thanks in advance

<GridColumn Field="Hours">
  <GroupFooterTemplate Context="gridContext">
    @{
      <div>@gridContext.Sum.ToString()</div>
     }
  </GroupFooterTemplate>
</GridColumn>

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Marin Bratanov
Telerik team
answered on 02 Mar 2021, 11:22 AM

Hello Maurice,

You can use standard .NET format strings and rounding, for example:

@* Group by the Team column to see the results and aggregate data in the footer *@

<TelerikGrid Data=@GridData Groupable="true" Pageable="true" Height="650px">
    <GridAggregates>
        <GridAggregate Field=@nameof(Employee.Team) Aggregate="@GridAggregateType.Count" />
        <GridAggregate Field=@nameof(Employee.Salary) Aggregate="@GridAggregateType.Max" />
        <GridAggregate Field=@nameof(Employee.Salary) Aggregate="@GridAggregateType.Sum" />
    </GridAggregates>
    <GridColumns>
        <GridColumn Field=@nameof(Employee.Name) Groupable="false" />
        <GridColumn Field=@nameof(Employee.Team) Title="Team">
            <GroupFooterTemplate>
                Team Members: <strong>@context.Count</strong>
            </GroupFooterTemplate>
        </GridColumn>
        <GridColumn Field=@nameof(Employee.Salary) Title="Salary" Groupable="false">
            <GroupFooterTemplate>
                Total montly salary (no decimals): @context.Sum?.ToString("N0")
                <br />
                <span style="color: red;">Salary sum (default): @context.Sum</span>
            </GroupFooterTemplate>
        </GridColumn>
        <GridColumn Field=@nameof(Employee.ActiveProjects) Title="Active Projects">
        </GridColumn>
    </GridColumns>
</TelerikGrid>

@code {
    public List<Employee> GridData { get; set; }

    protected override void OnInitialized()
    {
        GridData = new List<Employee>();
        var rand = new Random();
        for (int i = 0; i < 15; i++)
        {
            Random rnd = new Random();
            GridData.Add(new Employee()
            {
                EmployeeId = i,
                Name = "Employee " + i.ToString(),
                Team = "Team " + i % 3,
                Salary = NextDecimal(rand),
                ActiveProjects = i % 4 == 0 ? 2 : 5
            });
        }
    }

    //taken from and simplified for this examle https://stackoverflow.com/questions/609501/generating-a-random-decimal-in-c-sharp
    decimal NextDecimal(Random rng)
    {
        byte scale = (byte)rng.Next(29);
        bool sign = rng.Next(2) == 1;
        return new decimal(NextInt32(rng),
                           NextInt32(rng),
                           NextInt32(rng),
                           sign,
                           scale);
    }

    int NextInt32(Random rng)
    {
        int firstBits = rng.Next(0, 1 << 4) << 28;
        int lastBits = rng.Next(0, 1 << 28);
        return firstBits | lastBits;
    }

    public class Employee
    {
        public int EmployeeId { get; set; }
        public string Name { get; set; }
        public string Team { get; set; }
        public decimal Salary { get; set; }
        public int ActiveProjects { get; set; }
    }
}

Regards,
Marin Bratanov
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Maurice
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answered on 02 Mar 2021, 12:23 PM

I had tried this before but sometimes the differences between working and not working are small

@context.Sum.ToString("N0")

versus

@context.Sum?.ToString("N0")

Only the ? is the difference

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Marin Bratanov
Telerik team
answered on 02 Mar 2021, 12:47 PM

Hi Maurice,

The question mark is there because the .Sum field we provide is nullable (like the other fields). It might be null if there isn't a defined aggregate of that type for that field.

You can obtain such information from the intellisense:

Regards,
Marin Bratanov
Progress Telerik

Virtual Classroom, the free self-paced technical training that gets you up to speed with Telerik and Kendo UI products quickly just got a fresh new look + new and improved content including a brand new Blazor course! Check it out at https://learn.telerik.com/.

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