Asp Mvc read multiple appSettings

Question

I have to configure a list of values in the web.config of MVC 5 application. Is there a way to read multiple appSettings values? For example get all that have some prefix.

<appSettings>
    <add key="mylist_1" value="val1" />
    <add key="mylist_2" value="val2" />
    <add key="mylist_3" value="val3" />
    <add key="mylist_4" value="val4" />

    <add key="otherlist_1" value="val1" />
    <add key="otherlist_2" value="val2" />
    <add key="otherlist_3" value="val3" />
    <add key="otherlist_4" value="val4" />
</appSettings>

I have to get mylist_1 or otherlist_1. The simple option is to put all the values under one key, delimited by some char and split the string in the code.

DavidG · Accepted Answer · 2014-11-28 16:19:08Z

3

Using System.Configuration.ConfigurationManager.AppSettings will give you all of the settings, you can then filter out the ones you need quite easily from the collection.

var keys = ConfigurationManager
    .AppSettings
    .AllKeys
    .Where(k => k.StartsWith("xxx"));

var values = keys
    .Select(k => new KeyValuePair<string, string>
                         (k, ConfigurationManager.AppSettings[k]));

Now you can see all the keys/values like this:

foreach (var kvp in values)
{
    var key = kvp.Key;
    var val = kvp.Value;
}

Make sure you have a project reference to System.Configuration and a respective using System.Configuration; statement.

answered Nov 28, 2014 at 16:19

DavidG

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Morbia · Accepted Answer · 2014-11-28 16:18:58Z

1

 var mylistValues =  ConfigurationManager.AppSettings.AllKeys.Where(p => p.StartsWith("mylist_")).Select(p => ConfigurationManager.AppSettings[p]).ToList();

answered Nov 28, 2014 at 16:18

Morbia

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