I have an enum in my C# code and I want to get the same enum in javascript.
Is there any way to do this without hardcoding?
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I have an answer to that here: stackoverflow.com/questions/8345355/… but using MVC/Razor though.valdetero– valdetero2012-11-08 20:52:59 +00:00Commented Nov 8, 2012 at 20:52
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7 Answers
You can serialize all enum values to JSON:
private void ExportEnum<T>()
{
var type = typeof(T);
var values = Enum.GetValues(type).Cast<T>();
var dict = values.ToDictionary(e => e.ToString(), e => Convert.ToInt32(e));
var json = new JavaScriptSerializer().Serialize(dict);
var script = string.Format("{0}={1};", type.Name, json);
System.Web.UI.ScriptManager.RegisterStartupScript(this, GetType(), "CloseLightbox", script, true);
}
ExportEnum<MyEnum>();
This registers a script like:
MyEnum={"Red":1,"Green":2,"Blue":3};
1 Comment
David W
I realize this is a nearly three-year-old answer, but nonetheless, major props for what I think is a really elegant solution to this problem.
If you want it as viewmodel -> view -> JS
Requires:
using Newtonsoft.Json;
using System;
Viewmodel:
// viewmodel property:
public string MyEumJson
{
get
{
return JsonConvert.SerializeObject(Enum.GetValues(typeof(MyEum)), new Newtonsoft.Json.Converters.StringEnumConverter());
}
}
Then in your .cshtml:
@* View *@
<script>
var myEnumInJS = '@Html.Raw(Model.MyEumJson)';
</script>
this will be evaluated as
2 Comments
Basheer AL-MOMANI
and how to user it
Reafidy
@BasheerAL-MOMANI I had the same question, try like this:
var text = myEnumInJS[1]'Yes you can do it like this, i did it like this:
var OrderStateId = parseInt(stateVal);
if (OrderStateId === @((int)OrderStates.Approved)) {
// 5 is the Approved state
if (OrderOption === "Quote") {
$('#quoteDiv').css('display', 'block');
}
Comments
You can convert it to a list and then serialise it to JSON, for example:
// In the code-behind
private void _Default_Load(object sender, EventArgs e)
{
var objects = GetObjects();
var serialiser = new JavaScriptSerializer();
this.MyHiddenField.Value = serialiser.Serialize(objects);
}
// Example enumerable
static IEnumerable<MyClass> GetObjects()
{
for (int i = 0; i < 10; i++)
{
yield return new MyClass();
}
}
The above requires .Net 3.5 and a reference to the System.Web.Extensions assembly (for the use of JavaScriptSerializer, however alternative JSON serialisation libraries exist for .Net.
In your javascript code you should use a JSON serialisation library (such as json2) to deserialise your list:
var mylist = JSON.parse($("#MyHiddenField").val());
for (var i in mylist)
{
var item = mylist[i];
}
Update: Agg, I promise to actually read the question next time - enumeration, not enumerable!
Comments
For Razor
Works perfectly for Razor like this
var Enumerators = {
System: {
@{
<text>DayOfWeek: JSON.parse('@Html.Raw(Newtonsoft.Json.JsonConvert.SerializeObject(Enum.GetValues(typeof(DayOfWeek)), new Newtonsoft.Json.Converters.StringEnumConverter()))')</text>
}
}
}
This would give result like this in javaScript
Enumerators.System.DayOfWeek = ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"]
Please let me know if there is a mistake or not accordingly fitting to the required need, Thank You
For C# Server Side
Please see the following answer that might be useful
Comments
Here is the post that answered your question:
Comments
I found a good solution here
http://fairwaytech.com/2014/03/making-c-enums-available-within-javascript/
The only problem I have is that it doesn't carry the Description attributes. If you don't use/need descriptions then it is perfect.
This provides you with access on the client side, like so:
var Enums = {
phoneType: {phone:1,fax:2,voiceMail:3,cell:4,},
addressType: {mailing:1,physical:2,}
};
