Hello, I am looking for a way to pass List<ClassName> and count(int) values from my C# code-behind to JavaScript. Can anyone please guide me on how to achieve this?
Hello, I am looking for a way to pass List<ClassName> and count(int) values from my C# code-behind to JavaScript. Can anyone please guide me on how to achieve this?
If you're looking to serialize data in C#, you can utilize JavaScriptSerializer:
var myObject = new ObjectName();
...
var serializer = new JavaScriptSerializer();
var jsonData = serializer.Serialize(myObject);
Response.Write(jsonData);
To make use of this, don't forget to include the namespace: System.Web.Script.Serialization
UPDATE:
jQuery can also facilitate sending requests:
<script type="text/javascript">
$(document).ready(function() {
$.ajax({
type: 'POST',
url: 'WebForm2.aspx',
data: {},
dataType: 'json',
complete: function(XMLHttpRequest, textStatus) {
var Response = $.parseJSON(XMLHttpRequest.responseText);
alert(Response.Classes[0].Name);
}
});
});
</script>
For the back-end logic, here's what you need in the code-behind:
public partial class WebForm2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
var wrapper = new WrapperClass();
wrapper.Classes.Add(new ClassName() { Name = "Example 1" });
wrapper.Classes.Add(new ClassName() { Name = "Example 2" });
wrapper.Classes.Add(new ClassName() { Name = "Example 3" });
wrapper.Count = wrapper.Classes.Count;
var serializer = new JavaScriptSerializer();
var output = serializer.Serialize(wrapper);
Response.Write(output);
}
}
public class WrapperClass
{
public WrapperClass()
{
Classes = new List<ClassName>();
}
public List<ClassName> Classes { get; set; }
public int Count { get; set; }
}
public class ClassName
{
public string Name { get; set; }
}
A few tips for ASP.NET (though MVC may be more straightforward).
In WebForm2.aspx, strip away unnecessary HTML and keep only the page directive:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="AutocompleteASPNET.WebForm2" %>
One effective method to achieve the necessary functionality is by utilizing Ajax technology.
To implement this, you can create a page method in the code behind and then invoke that method on the client side using JavaScript.
If you want more information on how to call a server-side method from jQuery, you can refer to the following link:
Using jQuery to directly call ASP.NET AJAX page methods
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