Store String Array In appSettings?

Question

I\'d like to store a one dimensional string array as an entry in my appSettings. I can\'t simply separate elements with , or | because

Answer 1

You may also consider using custom configuration section/Collection for this purpose. Here is a sample:

<configSections>
    <section name="configSection" type="YourApp.ConfigSection, YourApp"/>
</configSections>

<configSection xmlns="urn:YourApp">
  <stringItems>
    <item value="String Value"/>
  </stringItems>
</configSection>

You can also check on this excellent Visual Studio add-in that allows you to graphically design .NET Configuration Sections and automatically generates all the required code and a schema definition (XSD) for them.

Answer 2

ASP.Net Core supports it binding a list of strings or objects.

For strings as mentioned, it is possible to retrieve it through AsEnumerable().

Or a list of objects via Get<List>(). The sample is below.

appsettings.json

{
...
  "my_section": {
    "objs": [
      {
        "id": "2",
        "name": "Object 1"
      },
        "id": "2",
        "name": "Object 2"
      }
    ]
  }
...
}

Class to represent the object

public class MyObject
{
    public string Id { get; set; }
    public string Name { get; set; }
}

Code to retrieve from appsettings.json

Configuration.GetSection("my_section:objs").Get<List<MyObject>>();

Answer 3

For integers I found the following way quicker.

First of all create a appSettings key with integer values separated by commas in your app.config.

<add key="myIntArray" value="1,2,3,4" />

Then split and convert the values into int array by using LINQ

int[] myIntArray =  ConfigurationManager.AppSettings["myIntArray"].Split(',').Select(n => Convert.ToInt32(n)).ToArray();

Answer 4

For strings it is easy, simply add the following to your web.config file:

<add key="myStringArray" value="fred,Jim,Alan" />

and then you can retrieve the value into an array as follows:

var myArray = ConfigurationManager.AppSettings["myStringArray"].Split(',');

Answer 5

You could use the AppSettings with a System.Collections.Specialized.StringCollection.

var myStringCollection = Properties.Settings.Default.MyCollection;
foreach (String value in myCollection)
{ 
    // do something
}

Each value is separated by a new line.

Here's a screenshot (german IDE but it might be helpful anyway)