Conditionals embedded in client templates

[Robert]

I have model class like so:

public class ServerModel
{
    public Guid Id { get; set; }
    public CustomerModel Customer { get; set; }
    public string Name { get; set; }
}

Inside a Kendo Grid, I'd like to display a link to the Customer, but as the Customer can be null, I'm having trouble getting this link to only show when the customer is not null. Below is the client template I'm trying to use:

@(Html.Kendo().Grid(Model)
      .Name("Grid")
      .Columns(columns =>
      {
          columns.Bound(s => s.Name)
                 .ClientTemplate("<a href='" + Url.Action("Details", "Server") + "/#= ID #'>#= Name #</a>");
          columns.Bound(s => s.Hostname);
          columns.Bound(s => s.Customer.Name).Title("Customer")
                 .ClientTemplate("#= Customer ? '<a href=\'" + Url.Action("Details", "Customer") + "/#= ID #\'>#= Customer.Name #</a>' : 'Unknown'#");
          columns.Bound(s => s.Reported).Title("Last Reported (UTC)").Format("{0:yyyy-MM-dd hh:mm:ss tt}");
      })

This just gives me a template error, though.

[Dimiter Madjarov]

Hello Robert,


To include the check for the null value in your ClientTemplate, you could modify it like this
E.g.

columns.Bound(p => p.ProductName).ClientTemplate("#if(Name != null){#" +
           "<a href='" + Url.Action("Details", "Server") + "/#=ID#'>#=Name#</a>" +
           "#} else {#" +
           "another template" +
           "# } #");

 

Greetings,
Dimiter Madjarov
the Telerik team

[Nathan]

How would I attempt to do this if I'm building the grid on the server (using Razor) and doing a footer template?  Sometimes the values may be null.  So if it's null, I want to add a 0 or string.empty

columns.Bound(c => c.Flowtime).Title("Time").Format(numericalformat).FooterTemplate(@<text>@item.Sum.Format(numericalformat)</text>);
.....
agg.Add(p => p.Flowtime).Sum();

[Dimiter Madjarov]

Hi Nathan,

I see that my colleague Alexander covered the issue in the support ticket on the same topic. Do not hesitate to contact us again if further problems arise.


Regards,
Dimiter Madjarov
Telerik