Related
The scenario is I created a class library for database connection. I also installed the System.Configuration.ConfigurationManager in this library.
Here is the code where the web.config access takes place:
public static class SqlDataAccess
{
public static string GetConnectionString(string name)
{
string strCon = ConfigurationManager.ConnectionStrings[name].ConnectionString;
return strCon;
}
}
And this is the code where I output the connection string.
[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{
[HttpGet]
public string Get()
{
string connString = SqlDataAccess.GetConnectionString("db");
return connString;
}
}
When I access the WeatherForecast API, it should print out the connection string. But instead printing it out, it prints out an error:
System.NullReferenceException: Object reference not set to an instance of an object.
The web.config file is in the ASP.NET Core Web API project and I added the class library as project reference.
This is the content of the web.config file:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<connectionStrings>
<add name="db" connectionString="{my connection string is in here}"/>
</connectionStrings>
</configuration>
I have seen answers regarding this problem, but they still did not work in my case.
I used your given code and wrote a test controller, the only difference here was adding the configure file and naming it as app.config. Here is the result of my testing here, which is able to get the value form the file:
If you insist using web.config, which is created while you publishing your project, I may recommend you adding the value in appsettings.json instead of adding it in web.config.
I'm working on a C# class library that needs to be able to read settings from the web.config or app.config file (depending on whether the DLL is referenced from an ASP.NET web application or a Windows Forms application).
I've found that
ConfigurationSettings.AppSettings.Get("MySetting")
works, but that code has been marked as deprecated by Microsoft.
I've read that I should be using:
ConfigurationManager.AppSettings["MySetting"]
However, the System.Configuration.ConfigurationManager class doesn't seem to be available from a C# Class Library project.
What is the best way to do this?
For a sample app.config file like below:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
<add key="countoffiles" value="7" />
<add key="logfilelocation" value="abc.txt" />
</appSettings>
</configuration>
You read the above application settings using the code shown below:
using System.Configuration;
You may also need to also add a reference to System.Configuration in your project if there isn't one already. You can then access the values like so:
string configvalue1 = ConfigurationManager.AppSettings["countoffiles"];
string configvalue2 = ConfigurationManager.AppSettings["logfilelocation"];
You'll need to add a reference to System.Configuration in your project's references folder.
You should definitely be using the ConfigurationManager over the obsolete ConfigurationSettings.
Update for .NET Framework 4.5 and 4.6; the following will no longer work:
string keyvalue = System.Configuration.ConfigurationManager.AppSettings["keyname"];
Now access the Setting class via Properties:
string keyvalue = Properties.Settings.Default.keyname;
See Managing Application Settings for more information.
Right click on your class library, and choose the "Add References" option from the Menu.
And from the .NET tab, select System.Configuration. This would include the System.Configuration DLL file into your project.
I'm using this, and it works well for me:
textBox1.Text = ConfigurationManager.AppSettings["Name"];
Read From Config:
You'll need to add a reference to the configuration:
Open "Properties" on your project
Go to "Settings" Tab
Add "Name" and "Value"
Get Value with using following code:
string value = Properties.Settings.Default.keyname;
Save to the configuration:
Properties.Settings.Default.keyName = value;
Properties.Settings.Default.Save();
You must add a reference to the System.Configuration assembly to the project.
You might be adding the App.config file to a DLL file. App.Config works only for executable projects, since all the DLL files take the configuration from the configuration file for the EXE file being executed.
Let's say you have two projects in your solution:
SomeDll
SomeExe
Your problem might be related to the fact that you're including the app.config file to SomeDLL and not SomeExe. SomeDll is able to read the configuration from the SomeExe project.
Try this:
string keyvalue = System.Configuration.ConfigurationManager.AppSettings["keyname"];
In the web.config file this should be the next structure:
<configuration>
<appSettings>
<add key="keyname" value="keyvalue" />
</appSettings>
</configuration>
Step 1: Right-click on references tab to add reference.
Step 2: Click on Assemblies tab
Step 3: Search for 'System.Configuration'
Step 4: Click OK.
Then it will work.
string value = System.Configuration.ConfigurationManager.AppSettings["keyname"];
I had the same problem. Just read them this way:
System.Configuration.ConfigurationSettings.AppSettings["MySetting"]
web.config is used with web applications. web.config by default has several configurations required for the web application. You can have a web.config for each folder under your web application.
app.config is used for Windows applications. When you build the application in Visual Studio, it will be automatically renamed to <appname>.exe.config and this file has to be delivered along with your application.
You can use the same method to call the app settings values from both configuration files:
System.Configuration.ConfigurationSettings.AppSettings["Key"]
As I found the best approach to access application settings variables in a systematic way by making a wrapper class over System.Configuration as below
public class BaseConfiguration
{
protected static object GetAppSetting(Type expectedType, string key)
{
string value = ConfigurationManager.AppSettings.Get(key);
try
{
if (expectedType == typeof(int))
return int.Parse(value);
if (expectedType == typeof(string))
return value;
throw new Exception("Type not supported.");
}
catch (Exception ex)
{
throw new Exception(string.Format("Config key:{0} was expected to be of type {1} but was not.",
key, expectedType), ex);
}
}
}
Now we can access needed settings variables by hard coded names using another class as below:
public class ConfigurationSettings:BaseConfiguration
{
#region App setting
public static string ApplicationName
{
get { return (string)GetAppSetting(typeof(string), "ApplicationName"); }
}
public static string MailBccAddress
{
get { return (string)GetAppSetting(typeof(string), "MailBccAddress"); }
}
public static string DefaultConnection
{
get { return (string)GetAppSetting(typeof(string), "DefaultConnection"); }
}
#endregion App setting
#region global setting
#endregion global setting
}
Also, you can use Formo:
Configuration:
<appSettings>
<add key="RetryAttempts" value="5" />
<add key="ApplicationBuildDate" value="11/4/1999 6:23 AM" />
</appSettings>
Code:
dynamic config = new Configuration();
var retryAttempts1 = config.RetryAttempts; // Returns 5 as a string
var retryAttempts2 = config.RetryAttempts(10); // Returns 5 if found in config, else 10
var retryAttempts3 = config.RetryAttempts(userInput, 10); // Returns 5 if it exists in config, else userInput if not null, else 10
var appBuildDate = config.ApplicationBuildDate<DateTime>();
If your needing/wanting to use the ConfigurationManager class...
You may need to load System.Configuration.ConfigurationManager by Microsoft via NuGet Package Manager
Tools->NuGet Package Manager->Manage NuGet Packages for Solution...
Microsoft Docs
One thing worth noting from the docs...
If your application needs read-only access to its own configuration,
we recommend that you use the GetSection(String) method. This method
provides access to the cached configuration values for the current
application, which has better performance than the Configuration
class.
I strongly recommend you to create a wrapper for this call. Something like a ConfigurationReaderService and use dependency injection to get this class. This way you will be able to isolate this configuration files for test purposes.
So use the ConfigurationManager.AppSettings["something"]; suggested and return this value. With this method you can create some kind of default return if there isn't any key available in the .config file.
Just for completeness, there's another option available for web projects only:
System.Web.Configuration.WebConfigurationManager.AppSettings["MySetting"]
The benefit of this is that it doesn't require an extra reference to be added, so it may be preferable for some people.
I always create an IConfig interface with typesafe properties declared for all configuration values. A Config implementation class then wraps the calls to System.Configuration. All your System.Configuration calls are now in one place, and it is so much easier and cleaner to maintain and track which fields are being used and declare their default values. I write a set of private helper methods to read and parse common data types.
Using an IoC framework you can access the IConfig fields anywhere your in application by simply passing the interface to a class constructor. You're also then able to create mock implementations of the IConfig interface in your unit tests so you can now test various configuration values and value combinations without needing to touch your App.config or Web.config file.
Please check the .NET version you are working on. It should be higher than 4. And you have to add the System.Configuration system library to your application.
You can use the below line. In my case it was working:
System.Configuration.ConfigurationSettings.AppSettings["yourKeyName"]
You must take care that the above line of code is also the old version and it's deprecated in new libraries.
The ConfigurationManager is not what you need to access your own settings.
To do this you should use
{YourAppName}.Properties.Settings.{settingName}
I was able to get the below approach working for .NET Core projects:
Steps:
Create an appsettings.json (format given below) in your project.
Next create a configuration class. The format is provided below.
I have created a Login() method to show the usage of the Configuration Class.
Create appsettings.json in your project with content:
{
"Environments": {
"QA": {
"Url": "somevalue",
"Username": "someuser",
"Password": "somepwd"
},
"BrowserConfig": {
"Browser": "Chrome",
"Headless": "true"
},
"EnvironmentSelected": {
"Environment": "QA"
}
}
public static class Configuration
{
private static IConfiguration _configuration;
static Configuration()
{
var builder = new ConfigurationBuilder()
.AddJsonFile($"appsettings.json");
_configuration = builder.Build();
}
public static Browser GetBrowser()
{
if (_configuration.GetSection("BrowserConfig:Browser").Value == "Firefox")
{
return Browser.Firefox;
}
if (_configuration.GetSection("BrowserConfig:Browser").Value == "Edge")
{
return Browser.Edge;
}
if (_configuration.GetSection("BrowserConfig:Browser").Value == "IE")
{
return Browser.InternetExplorer;
}
return Browser.Chrome;
}
public static bool IsHeadless()
{
return _configuration.GetSection("BrowserConfig:Headless").Value == "true";
}
public static string GetEnvironment()
{
return _configuration.GetSection("EnvironmentSelected")["Environment"];
}
public static IConfigurationSection EnvironmentInfo()
{
var env = GetEnvironment();
return _configuration.GetSection($#"Environments:{env}");
}
}
public void Login()
{
var environment = Configuration.EnvironmentInfo();
Email.SendKeys(environment["username"]);
Password.SendKeys(environment["password"]);
WaitForElementToBeClickableAndClick(_driver, SignIn);
}
Another possible solution:
var MyReader = new System.Configuration.AppSettingsReader();
string keyvalue = MyReader.GetValue("keyalue",typeof(string)).ToString();
I have been trying to find a fix for this same issue for a couple of days now. I was able to resolve this by adding a key within the appsettings tag in the web.config file. This should override the .dll file when using the helper.
<configuration>
<appSettings>
<add key="loginUrl" value="~/RedirectValue.cshtml" />
<add key="autoFormsAuthentication" value="false"/>
</appSettings>
</configuration>
extra : if you are working on a Class Library project you have to embed the settings.json file.
A class library shouldn't really be directly referencing anything in
app.config - the class doesn't have an app.config, because it's not an
application, it's a class.
Go to the JSON file's properties.
Change Build Action -> Embedded resource.
Use the following code to read it.
var assembly = Assembly.GetExecutingAssembly();
var resourceStream = assembly.GetManifestResourceStream("Assembly.file.json");
string myString = reader.ReadToEnd();
now we have a JSON string we can Deserialize it using JsonConvert
if you didn't embed the file inside the assembly you can't use only the DLL file without the file
I'm using Visual Studio for Mac version 17.0.6.
As you can see on this screenshot it is not possible to add a reference to System.Configuration.
Solution:
install NuGet Package - System.Configuration.ConfigurationManager.
Create app.config file and set "Build action" to "EmbeddedResource"
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<appSettings>
<add key="name" value="Joe"/>
</appSettings>
</configuration>
using System.Configuration;
enjoy)
string name = ConfigurationManager.AppSettings["name"];
BTW: Do not add an app.config for a library
I found the answer in this link https://stackoverflow.com/a/1836938/1492229
It's not only necessary to use the namespace System.Configuration. You have also to add the reference to the assembly System.Configuration.dll , by
Right-click on the References / Dependencies
Choose Add Reference
Find and add System.Configuration.
This will work for sure.
Also for the NameValueCollection you have to write:
using System.Collections.Specialized;
Here's an example: App.config
<applicationSettings>
<MyApp.My.MySettings>
<setting name="Printer" serializeAs="String">
<value>1234 </value>
</setting>
</MyApp.My.MySettings>
</applicationSettings>
Dim strPrinterName as string = My.settings.Printer
I have a solution with multiple projects. One of them is a Services project and within that most of my backend code resides and thus, the settings for most of those services reside in its app.config file.
I created a class to access all those settings, so they would be available outside the Services project.
public static class ServicesAppSettings
{
/// <summary>
/// Simple App Settings classes for strong typing
/// When creating a new class please ENSURE THAT THE PROPERTY NAME EXACTLY MATCHES THE APPSETTINGS KEY!
/// </summary>
public static class SmsSettings
{
public static string SmsProvider => ConfigurationManager.AppSettings["SmsProvider"];
public static string SmsAccountId => ConfigurationManager.AppSettings["SmsAccountId"];
public static string SmsPassword => ConfigurationManager.AppSettings["SmsAccountPassword"];
public static string SmsFromPhone => ConfigurationManager.AppSettings["SmsFromPhone"];
}
public static class EmailSettings
{
public static string EmailProvider => ConfigurationManager.AppSettings["EmailProvider"];
public static string EmailProviderHost => ConfigurationManager.AppSettings["EmailProviderHost"];
public static string EmailAccount => ConfigurationManager.AppSettings["EmailAccount"];
public static string EmailAccountPassword => ConfigurationManager.AppSettings["EmailAccountPassword"];
public static string GetEmailAddressFromApplication()
{
return string.Format(EmailAccount + "#" + EmailProvider);
}
}
public static class UserIcons
{
public static string MaleUserIconSource => ConfigurationManager.AppSettings["MaleUserIcon"];
public static string FemaleUserIconSource => ConfigurationManager.AppSettings["FemaleUserIcon"];
}
}
and it works perfectly fine EXCEPT when the settings aren't in the WEB.CONFIG file. Why on earth is this drawing from the mvc's web.config file and NOT its own libraries app.config file. Trust me, this is the case. If I remove one setting from web.config and then try to access it in a test it's null, if i put it back in web.config it works.
Anyone know why this is? Can you specify to the ConfigurationManager the name of the file you want to retrieve from?
It happens because only one configuration file is actually accessible - config of your executable project. That's why in mvc application you can read settings from web.config of your executable mvc application. If you would have service application (ms service) it will be app.config of you startup service.
As I know, you can not read settings from another config file.
One the possible solutions is to store your custom settings in .xml file and read it. This is also useful if you want to change your custom settings at a runtime.
Another one (in case you don't want to mess up your settings in appSettings section) is to create your custom config section and use it for your settings
Hope that helps
Web.config is the place to put your settings. Dlls that are part of a .net web solution will use it.
On my main project("Demo") I'm added a project reference to some project ("Common").
In "Common" project I'm have app.config file which contain:
<configuration>
<appSettings>
<add key="test" value="123"/>
</appSettings>
</configuration>
and a class:
public class Class1
{
public string Get()
{
return ConfigurationManager.AppSettings["test"];
}
}
On my main program ("demo") I'm add this code:
class Program
{
static void Main(string[] args)
{
Class1 c = new Class1();
Console.WriteLine(c.Get());
Console.ReadLine();
}
}
Since the app.config running on model of top layer configuration, it's not working.
I'm remember that in the past I'm added to demo project a app.config file with configsection node. But I'm have a problems to do this now - forgot how to do.
Can someone tell me how demo's app.config should looks like?
Thank you!!!
App.Config and Web.Config are always being read from the man executable projects. i.e. you need to add/merge the Common\app.config to your main\app.config
I'm working on a C# class library that needs to be able to read settings from the web.config or app.config file (depending on whether the DLL is referenced from an ASP.NET web application or a Windows Forms application).
I've found that
ConfigurationSettings.AppSettings.Get("MySetting")
works, but that code has been marked as deprecated by Microsoft.
I've read that I should be using:
ConfigurationManager.AppSettings["MySetting"]
However, the System.Configuration.ConfigurationManager class doesn't seem to be available from a C# Class Library project.
What is the best way to do this?
For a sample app.config file like below:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
<add key="countoffiles" value="7" />
<add key="logfilelocation" value="abc.txt" />
</appSettings>
</configuration>
You read the above application settings using the code shown below:
using System.Configuration;
You may also need to also add a reference to System.Configuration in your project if there isn't one already. You can then access the values like so:
string configvalue1 = ConfigurationManager.AppSettings["countoffiles"];
string configvalue2 = ConfigurationManager.AppSettings["logfilelocation"];
You'll need to add a reference to System.Configuration in your project's references folder.
You should definitely be using the ConfigurationManager over the obsolete ConfigurationSettings.
Update for .NET Framework 4.5 and 4.6; the following will no longer work:
string keyvalue = System.Configuration.ConfigurationManager.AppSettings["keyname"];
Now access the Setting class via Properties:
string keyvalue = Properties.Settings.Default.keyname;
See Managing Application Settings for more information.
Right click on your class library, and choose the "Add References" option from the Menu.
And from the .NET tab, select System.Configuration. This would include the System.Configuration DLL file into your project.
I'm using this, and it works well for me:
textBox1.Text = ConfigurationManager.AppSettings["Name"];
Read From Config:
You'll need to add a reference to the configuration:
Open "Properties" on your project
Go to "Settings" Tab
Add "Name" and "Value"
Get Value with using following code:
string value = Properties.Settings.Default.keyname;
Save to the configuration:
Properties.Settings.Default.keyName = value;
Properties.Settings.Default.Save();
You must add a reference to the System.Configuration assembly to the project.
You might be adding the App.config file to a DLL file. App.Config works only for executable projects, since all the DLL files take the configuration from the configuration file for the EXE file being executed.
Let's say you have two projects in your solution:
SomeDll
SomeExe
Your problem might be related to the fact that you're including the app.config file to SomeDLL and not SomeExe. SomeDll is able to read the configuration from the SomeExe project.
Try this:
string keyvalue = System.Configuration.ConfigurationManager.AppSettings["keyname"];
In the web.config file this should be the next structure:
<configuration>
<appSettings>
<add key="keyname" value="keyvalue" />
</appSettings>
</configuration>
Step 1: Right-click on references tab to add reference.
Step 2: Click on Assemblies tab
Step 3: Search for 'System.Configuration'
Step 4: Click OK.
Then it will work.
string value = System.Configuration.ConfigurationManager.AppSettings["keyname"];
I had the same problem. Just read them this way:
System.Configuration.ConfigurationSettings.AppSettings["MySetting"]
web.config is used with web applications. web.config by default has several configurations required for the web application. You can have a web.config for each folder under your web application.
app.config is used for Windows applications. When you build the application in Visual Studio, it will be automatically renamed to <appname>.exe.config and this file has to be delivered along with your application.
You can use the same method to call the app settings values from both configuration files:
System.Configuration.ConfigurationSettings.AppSettings["Key"]
As I found the best approach to access application settings variables in a systematic way by making a wrapper class over System.Configuration as below
public class BaseConfiguration
{
protected static object GetAppSetting(Type expectedType, string key)
{
string value = ConfigurationManager.AppSettings.Get(key);
try
{
if (expectedType == typeof(int))
return int.Parse(value);
if (expectedType == typeof(string))
return value;
throw new Exception("Type not supported.");
}
catch (Exception ex)
{
throw new Exception(string.Format("Config key:{0} was expected to be of type {1} but was not.",
key, expectedType), ex);
}
}
}
Now we can access needed settings variables by hard coded names using another class as below:
public class ConfigurationSettings:BaseConfiguration
{
#region App setting
public static string ApplicationName
{
get { return (string)GetAppSetting(typeof(string), "ApplicationName"); }
}
public static string MailBccAddress
{
get { return (string)GetAppSetting(typeof(string), "MailBccAddress"); }
}
public static string DefaultConnection
{
get { return (string)GetAppSetting(typeof(string), "DefaultConnection"); }
}
#endregion App setting
#region global setting
#endregion global setting
}
Also, you can use Formo:
Configuration:
<appSettings>
<add key="RetryAttempts" value="5" />
<add key="ApplicationBuildDate" value="11/4/1999 6:23 AM" />
</appSettings>
Code:
dynamic config = new Configuration();
var retryAttempts1 = config.RetryAttempts; // Returns 5 as a string
var retryAttempts2 = config.RetryAttempts(10); // Returns 5 if found in config, else 10
var retryAttempts3 = config.RetryAttempts(userInput, 10); // Returns 5 if it exists in config, else userInput if not null, else 10
var appBuildDate = config.ApplicationBuildDate<DateTime>();
If your needing/wanting to use the ConfigurationManager class...
You may need to load System.Configuration.ConfigurationManager by Microsoft via NuGet Package Manager
Tools->NuGet Package Manager->Manage NuGet Packages for Solution...
Microsoft Docs
One thing worth noting from the docs...
If your application needs read-only access to its own configuration,
we recommend that you use the GetSection(String) method. This method
provides access to the cached configuration values for the current
application, which has better performance than the Configuration
class.
I strongly recommend you to create a wrapper for this call. Something like a ConfigurationReaderService and use dependency injection to get this class. This way you will be able to isolate this configuration files for test purposes.
So use the ConfigurationManager.AppSettings["something"]; suggested and return this value. With this method you can create some kind of default return if there isn't any key available in the .config file.
Just for completeness, there's another option available for web projects only:
System.Web.Configuration.WebConfigurationManager.AppSettings["MySetting"]
The benefit of this is that it doesn't require an extra reference to be added, so it may be preferable for some people.
I always create an IConfig interface with typesafe properties declared for all configuration values. A Config implementation class then wraps the calls to System.Configuration. All your System.Configuration calls are now in one place, and it is so much easier and cleaner to maintain and track which fields are being used and declare their default values. I write a set of private helper methods to read and parse common data types.
Using an IoC framework you can access the IConfig fields anywhere your in application by simply passing the interface to a class constructor. You're also then able to create mock implementations of the IConfig interface in your unit tests so you can now test various configuration values and value combinations without needing to touch your App.config or Web.config file.
Please check the .NET version you are working on. It should be higher than 4. And you have to add the System.Configuration system library to your application.
You can use the below line. In my case it was working:
System.Configuration.ConfigurationSettings.AppSettings["yourKeyName"]
You must take care that the above line of code is also the old version and it's deprecated in new libraries.
The ConfigurationManager is not what you need to access your own settings.
To do this you should use
{YourAppName}.Properties.Settings.{settingName}
I was able to get the below approach working for .NET Core projects:
Steps:
Create an appsettings.json (format given below) in your project.
Next create a configuration class. The format is provided below.
I have created a Login() method to show the usage of the Configuration Class.
Create appsettings.json in your project with content:
{
"Environments": {
"QA": {
"Url": "somevalue",
"Username": "someuser",
"Password": "somepwd"
},
"BrowserConfig": {
"Browser": "Chrome",
"Headless": "true"
},
"EnvironmentSelected": {
"Environment": "QA"
}
}
public static class Configuration
{
private static IConfiguration _configuration;
static Configuration()
{
var builder = new ConfigurationBuilder()
.AddJsonFile($"appsettings.json");
_configuration = builder.Build();
}
public static Browser GetBrowser()
{
if (_configuration.GetSection("BrowserConfig:Browser").Value == "Firefox")
{
return Browser.Firefox;
}
if (_configuration.GetSection("BrowserConfig:Browser").Value == "Edge")
{
return Browser.Edge;
}
if (_configuration.GetSection("BrowserConfig:Browser").Value == "IE")
{
return Browser.InternetExplorer;
}
return Browser.Chrome;
}
public static bool IsHeadless()
{
return _configuration.GetSection("BrowserConfig:Headless").Value == "true";
}
public static string GetEnvironment()
{
return _configuration.GetSection("EnvironmentSelected")["Environment"];
}
public static IConfigurationSection EnvironmentInfo()
{
var env = GetEnvironment();
return _configuration.GetSection($#"Environments:{env}");
}
}
public void Login()
{
var environment = Configuration.EnvironmentInfo();
Email.SendKeys(environment["username"]);
Password.SendKeys(environment["password"]);
WaitForElementToBeClickableAndClick(_driver, SignIn);
}
Another possible solution:
var MyReader = new System.Configuration.AppSettingsReader();
string keyvalue = MyReader.GetValue("keyalue",typeof(string)).ToString();
I have been trying to find a fix for this same issue for a couple of days now. I was able to resolve this by adding a key within the appsettings tag in the web.config file. This should override the .dll file when using the helper.
<configuration>
<appSettings>
<add key="loginUrl" value="~/RedirectValue.cshtml" />
<add key="autoFormsAuthentication" value="false"/>
</appSettings>
</configuration>
extra : if you are working on a Class Library project you have to embed the settings.json file.
A class library shouldn't really be directly referencing anything in
app.config - the class doesn't have an app.config, because it's not an
application, it's a class.
Go to the JSON file's properties.
Change Build Action -> Embedded resource.
Use the following code to read it.
var assembly = Assembly.GetExecutingAssembly();
var resourceStream = assembly.GetManifestResourceStream("Assembly.file.json");
string myString = reader.ReadToEnd();
now we have a JSON string we can Deserialize it using JsonConvert
if you didn't embed the file inside the assembly you can't use only the DLL file without the file
I'm using Visual Studio for Mac version 17.0.6.
As you can see on this screenshot it is not possible to add a reference to System.Configuration.
Solution:
install NuGet Package - System.Configuration.ConfigurationManager.
Create app.config file and set "Build action" to "EmbeddedResource"
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<appSettings>
<add key="name" value="Joe"/>
</appSettings>
</configuration>
using System.Configuration;
enjoy)
string name = ConfigurationManager.AppSettings["name"];
BTW: Do not add an app.config for a library
I found the answer in this link https://stackoverflow.com/a/1836938/1492229
It's not only necessary to use the namespace System.Configuration. You have also to add the reference to the assembly System.Configuration.dll , by
Right-click on the References / Dependencies
Choose Add Reference
Find and add System.Configuration.
This will work for sure.
Also for the NameValueCollection you have to write:
using System.Collections.Specialized;
Here's an example: App.config
<applicationSettings>
<MyApp.My.MySettings>
<setting name="Printer" serializeAs="String">
<value>1234 </value>
</setting>
</MyApp.My.MySettings>
</applicationSettings>
Dim strPrinterName as string = My.settings.Printer