How do I concatenate strings in C# embedded in Razor page javascript?

Question

I have a string I'd like to format in a javascript function on a Razor page. I am currently doing it by concatenating the sub strings.

function Foo(actionName, entityName) {
    var message = "Are you sure you want to ".concat(actionName).concat(" ").concat(entityName);
}

I would like to be able to call C# directly to concatenate the substrings more cleanly with something like this:

@var message = $"Are you sure you want to {actionName} {entityName}";

How do I do this with embedded C# in the Razor page javascript?

Julian Goldsmith · Accepted Answer · 2021-05-13 13:53:32Z

3

In JavaScript, it's possible to format strings using template literals.

An example from Mozilla's documentation would be:

console.log(`Fifteen is ${a + b} and not ${2 * a + b}.`);

answered May 13, 2021 at 13:53

Julian Goldsmith

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Comments

Oluwadamilola Adegunwa · Accepted Answer · 2021-05-13 14:21:07Z

0

function Foo(actionName, entityName) {
    var message = "Are you sure you want to "+ actionName + " " + entityName;
    console.log(message);
}

//or this
function Foo(actionName, entityName) {
    var message = 'Are you sure you want to '+ actionName + ' ' + entityName;
    console.log(message);
}
//or this
function Foo(actionName, entityName) {
    var message = `Are you sure you want to `+ actionName + ` ` + entityName;
    console.log(message);
}
//or this
function Foo(actionName, entityName) {
    var message = [`Are you sure you want to `,actionName,entityName].join(` `);//feel free to use `` or '' or ""
    console.log(message);
}

edited May 13, 2021 at 14:21

answered May 13, 2021 at 14:09

Oluwadamilola Adegunwa

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4 Comments

Robert Harvey Over a year ago

I don't think this is what the OP had in mind.

Oluwadamilola Adegunwa Over a year ago

@RobertHarvey you have a point. Julian Goldsmith has already given the answer I would I have given. I thought I should add this for completeness. This I think is still cleaner than the one in the question.

JohnB Over a year ago

I'm new to Razor and was looking at using the embedded C# features.

JohnB Over a year ago

Specifically, I'd like to user something like to be able to define on a Razor page, a string like this $"{personName} has a {petTypeName}"

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