Enum to Dictionary in C#

Question

I have searched this online, but I can\'t find the answer I am looking for.

Basically I have the following enum:

public enum typFoo : int
{
   itemA         


        

Answer 1

Use:

public static class EnumHelper
{
    public static IDictionary<int, string> ConvertToDictionary<T>() where T : struct
    {
        var dictionary = new Dictionary<int, string>();

        var values = Enum.GetValues(typeof(T));

        foreach (var value in values)
        {
            int key = (int) value;

            dictionary.Add(key, value.ToString());
        }

        return dictionary;
    }
}

Usage:

public enum typFoo : int
{
   itemA = 1,
   itemB = 2,
   itemC = 3
}

var mydic = EnumHelper.ConvertToDictionary<typFoo>();

Answer 2

If you need only the name you don't have to create that dictionary at all.

This will convert enum to int:

 int pos = (int)typFoo.itemA;

This will convert int to enum:

  typFoo foo = (typFoo) 1;

And this will retrun you the name of it:

 ((typFoo) i).toString();

Answer 3

+1 to Ani. Here's the VB.NET version

Here's the VB.NET version of Ani's answer:

Public Enum typFoo
    itemA = 1
    itemB = 2
    itemC = 3
End Enum

Sub example()

    Dim dict As Dictionary(Of Integer, String) = System.Enum.GetValues(GetType(typFoo)) _
                                                 .Cast(Of typFoo)() _
                                                 .ToDictionary(Function(t) Integer.Parse(t), Function(t) t.ToString())
    For Each i As KeyValuePair(Of Integer, String) In dict
        MsgBox(String.Format("Key: {0}, Value: {1}", i.Key, i.Value))
    Next

End Sub

---

Additional example

In my case, I wanted to save the path of important directories and store them in my web.config file's AppSettings section. Then I created an enum to represent the keys for these AppSettings...but my front-end engineer needed access to these locations in our external JavaScript files. So, I created the following code-block and placed it in our primary master page. Now, each new Enum item will auto-create a corresponding JavaScript variable. Here's my code block:

    <script type="text/javascript">
        var rootDirectory = '<%= ResolveUrl("~/")%>';
        // This next part will loop through the public enumeration of App_Directory and create a corresponding JavaScript variable that contains the directory URL from the web.config.
        <% Dim App_Directories As Dictionary(Of String, App_Directory) = System.Enum.GetValues(GetType(App_Directory)) _
                                                                   .Cast(Of App_Directory)() _
                                                                   .ToDictionary(Of String)(Function(dir) dir.ToString)%>
        <% For Each i As KeyValuePair(Of String, App_Directory) In App_Directories%>
            <% Response.Write(String.Format("var {0} = '{1}';", i.Key, ResolveUrl(ConfigurationManager.AppSettings(i.Value))))%>
        <% next i %>
    </script>

NOTE: In this example, I used the name of the enum as the key (not the int value).

Answer 4

Try:

var dict = Enum.GetValues(typeof(fooEnumType))
               .Cast<fooEnumType>()
               .ToDictionary(t => (int)t, t => t.ToString() );