What method is most effective for transferring arrays from C# to Javascript in a simple and straightforward manner?

Question

What method is most effective for transferring arrays from C# to Javascript in a simple and straightforward manner?

Although there may be similar questions here, none of them are asking the exact same thing as mine.

For my ASP.NET MVC4 project, I have decided to use aspx as my view engine. Within my views, I have integrated a JavaScript code that takes a table of values as input and generates a graph based on those values.

The values I need for the graph are fetched from my database using the following query:

var query = from b in db.SchoolTestsPerModulePerStudent
            where b.StudentID.Equals(2)
            select b;

So, my current challenge is to take the results of this query and split them into two arrays - one containing the test id and the other containing the student's grade. While I haven't figured out how to do this yet, I am hoping to find a solution soon. Once I have these arrays, I'm wondering what the most efficient and clear method would be to pass them from C# to JavaScript.

c#javascript asp.net arrays asp.net-mvc-4

Answer 1

Answer №1

Transform the object into JSON format. If your Model happens to be IEnumerable<string>:

Controller

public ActionResult Index()
{
    IList<string> strings = new List<string>();
    strings.Add("Java");
    strings.Add("C++");
    strings.Add("HTML");
    strings.Add("CSS");
    return View(strings);
}

View

@Json.Encode(Model)

Output:

["Java","C++","HTML","CSS"]

Splitting arrays

how to divide its results into two arrays

Utilize Linq.

var student = db.SchoolTestsPerModulePerStudent.Where(x => x.StudentId == 2);
var dates = student.Select(x => x.TestDate);
var grades = student.Select(x => x.TestGrade);

Answer 2

Transform the object into JSON format. If your Model happens to be IEnumerable<string>:

Controller

public ActionResult Index()
{
    IList<string> strings = new List<string>();
    strings.Add("Java");
    strings.Add("C++");
    strings.Add("HTML");
    strings.Add("CSS");
    return View(strings);
}

View

@Json.Encode(Model)

Output:

["Java","C++","HTML","CSS"]

Splitting arrays

how to divide its results into two arrays

Utilize Linq.

var student = db.SchoolTestsPerModulePerStudent.Where(x => x.StudentId == 2);
var dates = student.Select(x => x.TestDate);
var grades = student.Select(x => x.TestGrade);

Answer 3

Answer №2

When providing data to your view, make sure to include a strongly typed list in the model that includes an id and grade. Utilize HTML helpers in your view, such as those available in Razor, to easily generate dropdown lists by passing in Model.MyList as an argument.

I wish I could provide an example right now, but unfortunately I am not currently at work.

Answer 4

When providing data to your view, make sure to include a strongly typed list in the model that includes an id and grade. Utilize HTML helpers in your view, such as those available in Razor, to easily generate dropdown lists by passing in Model.MyList as an argument.

I wish I could provide an example right now, but unfortunately I am not currently at work.

What method is most effective for transferring arrays from C# to Javascript in a simple and straightforward manner?

Answer №1

Controller

View

Output:

Splitting arrays

Answer №2

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