CODEWITHSUNDEEP
c#app-config
betsou
betsou

Reputation: 143

C# Parameters class with app.config

I have a configuration class with all the parameters of my application, to acquire images from a scanner.
I have parameters like color/BW, resolution...
The parameters are changed often, so I'm searching a solution to write automatically when I save the parameters the changed parameters in the app.config file. And to do the reverted thing, write my class from the app.config at the init of the software. Here are my two classes : 

private void GetParameters() {
        try
        {
            var appSettings = ConfigurationManager.AppSettings;
            Console.WriteLine( ConfigurationManager.AppSettings["MyKey"]);

            if (appSettings.Count == 0)
            {
                Console.WriteLine("AppSettings is empty.");
            }
            else
            {
                foreach (var key in appSettings.AllKeys)
                {
                    Console.WriteLine("Key: {0} Value: {1}", key, appSettings[key]);
                }
            }
        }
        catch (ConfigurationErrorsException)
        {
            MessageBox.Show("Error reading app settings");
        }
    }
    private void SetParameters(string key, string value)
    {
        try
        {
            Configuration configManager = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
            KeyValueConfigurationCollection confCollection = configManager.AppSettings.Settings;
            if (confCollection[key] == null)
            {
                confCollection.Add(key, value);
            }
            else
            {
                confCollection[key].Value = value;
            }
            configManager.Save(ConfigurationSaveMode.Modified);
            ConfigurationManager.RefreshSection(configManager.AppSettings.SectionInformation.Name);
        }
        catch (ConfigurationErrorsException)
        {

            MessageBox.Show("Error writing app settings");
        }

    }

I don't want to call the method for every parameter...
And there is my parameters class :

class ScannerParameters
{
    public bool Color { get; set; }

    public int Resolution{ get; set; }

    public string FilePath { get; set; }

    public TypeScan TypeScan { get; set; }

    public string TextTest{ get; set; }

}

Upvotes: 0

Views: 999

Answers (1)

pijemcolu
pijemcolu

Reputation: 2605

The question can be translated into how do I save an object into some kind of persistence?

Either use a database (seems like an overkill) or serialize it using a serializer or simply write it all down into a text file yourself. Using json serialization, serializing your ScannerParameters and then writing that into a file would seem most appropriate.

Using newtonsoft json, which is defacto standard for .net there's nice examples @ http://www.newtonsoft.com/json/help/html/SerializingJSON.htm

In your case you would do:

// our dummy scannerParameters objects
var parameters = new ScannerParameters();

// let's serialize it all into one string
string output = JsonConvert.SerializeObject(paramaters);

// let's write all that into a settings text file
System.IO.File.WriteAllText("parameters.txt", output);

// let's read the file next time we need it
string parametersJson = System.IO.File.ReadAllText("parameters.txt);

// let's deserialize the parametersJson
ScannerParameters scannerParameters = JsonConvert.DeserializeObject<ScannerParameters>(parametersJson);

Upvotes: 1

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