CODEWITHSUNDEEP
c#config
John Ryann
John Ryann

Reputation: 2393

C# App.Config with array or list like data

How to have array or list like information in app.config? I want user to be able to put as many IPs as possible (or as needed). My program would just take whatever specified in app.config. How to do this?

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key="ip" value="x" />
    <add key="ip" value="y" />
    <add key="ip" value="z" />
    </appSettings>
</configuration>



public string ip = ConfigurationManager.AppSettings["ip"];

Upvotes: 33

Views: 78255

Answers (3)

Divya
Divya

Reputation: 369

In App.config,

<add key="YOURKEY" value="a,b,c"/>

In C#,

STRING ARRAY:

string[] InFormOfStringArray = ConfigurationManager.AppSettings["YOURKEY"].Split(',').Select(s => s.Trim()).ToArray();

LIST :

 List<string> list = new List<string>(InFormOfStringArray);

Upvotes: 12

Thorsten Dittmar
Thorsten Dittmar

Reputation: 56697

You can set the type of a setting in the settings designer to StringCollection, which allows you to create a list of strings.

Screenshot

You can later access individual values as Properties.Settings.Default.MyCollection[x].

In the app.config file this looks as follows:

<setting name="MyCollection" serializeAs="Xml">
<value>
    <ArrayOfString xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
        <string>Value1</string>
        <string>Value2</string>
    </ArrayOfString>
</value>
</setting>

Upvotes: 21

milagvoniduak
milagvoniduak

Reputation: 3254

The easiest way would be a comma separated list in your App.config file. Of course you can write your own configuration section, but what is the point of doing that if it is just an array of strings, keep it simple.

<configuration>
  <appSettings>
    <add key="ips" value="z,x,d,e" />
  </appSettings>
</configuration>

public string[] ipArray = ConfigurationManager.AppSettings["ips"].Split(',');

Upvotes: 58

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