Implementing Jquery Datatables in C# Codebase

Question

Implementing Jquery Datatables in C# Codebase

I'm struggling to populate my jQuery Datatable with a List. Currently, I am writing the list to a file and accessing it in my view-model. Is this the correct approach?

This is the snippet of my code:

 
List<string> list = new List<string>();
foreach (var item in db.Pos)
{
   var total = 0;
   decimal costo = 0;

   for (int i = 1; i <= 31; i++)
   {
      var value = 0;
      if (item.Fecha.Day == i) { value = item.Cantidad; costo = costo + item.Total; }
      total += value;
   }

   // Add items to the list

}

// Serialize list to JSON and write to file
var json = JsonConvert.SerializeObject(new List<object>() { list });
System.IO.File.WriteAllText(@"\path.txt", json);

And my AJAX call to populate the Datatable:

$(document).ready(function () {
   var table = $('#pftable_hdr').DataTable({
    ajax: {
      url: "/path.txt",
      dataSrc: ""
    },
    scrollY: "500px",
    scrollX: true,
    scrollCollapse: true,
    fixedColumns: {
      leftColumns: 3
    }
  });
});

Sample output from my text file:

[["ENS FRUTAS","REST","CENAS","$26.50","0","1" ... "$25.50"]]

How can I properly load my list into the Jquery datatable? The text file should have brackets [] at the beginning and end but I'm having trouble achieving that.

javascript c#ajax list datatables

Answer 1

Answer №1

Here is an example of what your backend code could look like. This code will generate a JSON string structured like this:

[["","",""...],["","",""...],["","",""...]]

List<List<string>> list = new List<List<string>();
foreach (var item in db.Pos)
{
    List<string> listItem = new List<string>();
    var total = 0;
    decimal costo = 0;

    for (int i = 1; i <= 31; i++)
    {
        var value = 0;
        if (item.Fecha.Day == i) { value = item.Cantidad; costo = costo + item.Total; }
        total += value;
    }

    listItem.Add(item.Descripcion);
    listItem.Add(item.Pdv);
    listItem.Add(item.Rid);
    listItem.Add(((costo / (total + 1)).ToString("C")));

    for (int i = 1; i <= 31; i++)
    {
        var value = 0;
        listItem.Add(value.ToString());
        int month = item.Fecha.Month;
        if (item.Fecha.Day == i) { value = item.Cantidad;    listItem.Add(value.ToString()); }                                                
    }

    listItem.Add(total.ToString());
    listItem.Add((((costo / (total + 1)) * total).ToString("C")));
    list.Add(listItem);
}

var json = JsonConvert.SerializeObject(list);
System.IO.File.WriteAllText(@"\path.txt", json);

Answer 2

Here is an example of what your backend code could look like. This code will generate a JSON string structured like this:

[["","",""...],["","",""...],["","",""...]]

List<List<string>> list = new List<List<string>();
foreach (var item in db.Pos)
{
    List<string> listItem = new List<string>();
    var total = 0;
    decimal costo = 0;

    for (int i = 1; i <= 31; i++)
    {
        var value = 0;
        if (item.Fecha.Day == i) { value = item.Cantidad; costo = costo + item.Total; }
        total += value;
    }

    listItem.Add(item.Descripcion);
    listItem.Add(item.Pdv);
    listItem.Add(item.Rid);
    listItem.Add(((costo / (total + 1)).ToString("C")));

    for (int i = 1; i <= 31; i++)
    {
        var value = 0;
        listItem.Add(value.ToString());
        int month = item.Fecha.Month;
        if (item.Fecha.Day == i) { value = item.Cantidad;    listItem.Add(value.ToString()); }                                                
    }

    listItem.Add(total.ToString());
    listItem.Add((((costo / (total + 1)) * total).ToString("C")));
    list.Add(listItem);
}

var json = JsonConvert.SerializeObject(list);
System.IO.File.WriteAllText(@"\path.txt", json);

Answer 3

Answer №2

Give this a try:

 list.Add("[");
 list.Add(item.Description);
// more code....

list.Add((((cost / (total + 1)) * total).ToString("C")));
list.Add("]");

Do you think this solution will suit your needs? Please share your feedback.

Answer 4

Give this a try:

 list.Add("[");
 list.Add(item.Description);
// more code....

list.Add((((cost / (total + 1)) * total).ToString("C")));
list.Add("]");

Do you think this solution will suit your needs? Please share your feedback.

Answer 5

Answer №3

By using JsonConvert.SerializeObject, you can directly convert the list into a JSON string without creating a new object.

The initial code snippet unnecessarily creates a new object and assigns "list" to it even though "list" is already an object.

You can simplify the code by simply passing "list" as a parameter to JsonConvert.SerializeObject like so:

var json = JsonConvert.SerializeObject(list);

Following this approach will give you the desired output efficiently.

Answer 6

By using JsonConvert.SerializeObject, you can directly convert the list into a JSON string without creating a new object.

The initial code snippet unnecessarily creates a new object and assigns "list" to it even though "list" is already an object.

You can simplify the code by simply passing "list" as a parameter to JsonConvert.SerializeObject like so:

var json = JsonConvert.SerializeObject(list);

Following this approach will give you the desired output efficiently.

Implementing Jquery Datatables in C# Codebase

Answer №1

Answer №2

Answer №3

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