Explicit Razor expressions not working in @foreach output model property and concatenate with text-CodePudding

I would like to create the following markup

     <tr onclick="toggle(110)" data-order-id-110=110><td>foo</td></tr>

the important part is the data-attribute data-order-id-110=110. For every item in my model the id (here 110) should be written as a data-attribute that includes the id in this case 110.

According to my understanding of Explicit Razor expressions

Any content within the @() parenthesis is evaluated and rendered to the output.

it should be good enough to write

// this code
data-order-id-@(@order.Id)[email protected]

// actual returns 
data-order-id@(@order.id)="1"

// expected
data-order-id-1="1"

So besides @(@) i also tried @{=@} like this

 data-order-id-@(@order.Id)[email protected]
 data-order-id-@{[email protected]}[email protected]

Both did not work, see below.

My code

I tried

  <tr onclick="toggleOrderDetails(@order.Id)" 
      data-order-id-@(order.Id)[email protected]>

which returns

 <tr onclick="toggleOrderDetails(1)" data-order-id-@(order.id)="1">
       .....
        </tr>

and also tried

 @foreach (var order in Model.Orders)
 {
     <tr onclick="toggleOrderDetails(@order.Id)" data-order-id-@{[email protected]}[email protected]>
            <td>@order.Id</td>
            <td>@order.CustomerId</td>
            <td>@order.OrderDate</td>
     </tr> 
 }

The html output

 <tr onclick="toggleOrderDetails(1)" data-order-id-@{="1}=1">
            <td>1</td>
            <td>1</td>
            <td>26.08.2021 10:30:00</td>
  </tr>

As you can see insteald of data-order-id-1=1 the string data-order-id-@{="1}=1 is created.

expected: data-order-id-1=1
actual: data-order-id-@{="1}=1

Others have mentioned to us @: but this does not work

Installed version

dotnet --info

returns

 .NET Core SDK (reflecting any global.json):
      Version:   3.1.118     Commit:    42170158ee

 Host (useful for support):
      Version: 3.1.18        Commit:  5d3919d34e

 .NET Core SDKs installed:
      3.1.118 [C:\Program Files\dotnet\sdk]

 .NET Core runtimes installed:
      Microsoft.AspNetCore.App 3.1.18 
      Microsoft.NETCore.App 3.1.18 
      Microsoft.WindowsDesktop.App 3.1.18

The assemply for class MvcServiceCollectionExtensions is

#region Assembly Microsoft.AspNetCore.Mvc
         , Version=3.1.0.0, Culture=neutral
         , PublicKeyToken=adb9793829ddae60
         // Microsoft.AspNetCore.Mvc.dll
#endregion

Questions

What do i need to concatenate an html data-attribute with a property from a model

CodePudding user response：

I was able to solve it like this

@foreach (var order in Model.Orders)
{
    string attribute = "data-order-id-" @order.Id;
    <tr onclick="toggleOrderDetails(@order.Id)" @(attribute)[email protected]>
}

This returns this markup

 <tr onclick="toggleOrderDetails(1)" data-order-id-1="1">
       ....
 </tr>