Invalid Uri: the Format of the Uri Could Not Be Determined

C# | Invalid URI: The format of the URI could not be determined

try putting the protocol prefix in front the ip, i.e. in your case "http://"

The format of the URI could not be determined when combining absolute and relative URLs in C#

The "/AdvancedCalender/Calenders/Versions" is a relative URI, so you need to tag is like that:

Uri relativeUri = new Uri("/" + directory, UriKind.Relative);

How to fix Invalid URI: The format of the URI could not be determined in asp.net core problem

For loggingBuilder.AddSeq("Seq");, you need to pass url instead of Seq.

    //
// Summary:
//     Extends Microsoft.Extensions.Logging.ILoggerFactory with methods for configuring
//     Seq logging.
public static class SeqLoggerExtensions
{
    //
    // Summary:
    //     Adds a Seq logger configured from the supplied configuration section.
    //
    // Parameters:
    //   loggerFactory:
    //     The logger factory.
    //
    //   configuration:
    //     A configuration section with details of the Seq server connection.
    //
    // Returns:
    //     A logger factory to allow further configuration.
    public static ILoggerFactory AddSeq(this ILoggerFactory loggerFactory, IConfigurationSection configuration);
    //
    // Summary:
    //     Adds a Seq logger.
    //
    // Parameters:
    //   loggerFactory:
    //     The logger factory.
    //
    //   serverUrl:
    //     The Seq server URL; the default is http://localhost:5341.
    //
    //   apiKey:
    //     A Seq API key to authenticate or tag messages from the logger.
    //
    //   minimumLevel:
    //     The level below which events will be suppressed (the default is Microsoft.Extensions.Logging.LogLevel.Information).
    //
    //   levelOverrides:
    //     A dictionary mapping logger name prefixes to minimum logging levels.
    //
    // Returns:
    //     A logger factory to allow further configuration.
    public static ILoggerFactory AddSeq(this ILoggerFactory loggerFactory, string serverUrl = "http://localhost:5341", string apiKey = null, LogLevel minimumLevel = LogLevel.Information, IDictionary<string, LogLevel> levelOverrides = null);
    //
    // Summary:
    //     Adds a Seq logger.
    //
    // Parameters:
    //   loggingBuilder:
    //     The logging builder.
    //
    //   serverUrl:
    //     The Seq server URL; the default is http://localhost:5341.
    //
    //   apiKey:
    //     A Seq API key to authenticate or tag messages from the logger.
    //
    // Returns:
    //     A logging builder to allow further configuration.
    public static ILoggingBuilder AddSeq(this ILoggingBuilder loggingBuilder, string serverUrl = "http://localhost:5341", string apiKey = null);
    //
    // Summary:
    //     Adds a Seq logger configured from the supplied configuration section.
    //
    // Parameters:
    //   loggingBuilder:
    //     The logging builder.
    //
    //   configuration:
    //     A configuration section with details of the Seq server connection.
    //
    // Returns:
    //     A logging builder to allow further configuration.
    public static ILoggingBuilder AddSeq(this ILoggingBuilder loggingBuilder, IConfigurationSection configuration);
}

If you want to passing the configuration from appsettings.json, define the appsettings.json like

    "Seq": {
  "ServerUrl": "http://localhost:5341",
  "ApiKey": "1234567890",
  "MinimumLevel": "Trace",
  "LevelOverride": {
    "Microsoft": "Warning"
  }
}

And using like loggingBuilder.AddSeq(Configuration.GetSection("Seq"));.

If you need to combine serilog and Seq, refer Using Serilog.

Log.Logger = new LoggerConfiguration()
        .WriteTo.Console()
        .WriteTo.Seq("http://localhost:5341")
        .CreateLogger();

Invalid URI: The format of the URI could not be determined, Need a solution or alternative method to create a connection to the DB

UPDATE

This problem is very strange, I tried to reduce the package version, but they all work normally. So I think the problem is not the package version.

Maybe you can debug your program with breakpoints. Like ,

string URL = Configuration["CosmosDB:URL"];
string PrimaryKey = Configuration["CosmosDB:PrimaryKey"];
services.AddSingleton<IDocumentClient>(x => new DocumentClient(new Uri(Configuration["CosmosDB:URL"]), Configuration["CosmosDB:PrimaryKey"]));

If the problem is not solved, there really is no better way to configure the parameters

PRIVIOUS

Your code is right, but now you face this issue. I guess it may be caused by the version of the package.

I have created a core app which db is in local and try it success. My package version like bellow.

  <ItemGroup>
    <PackageReference Include="Microsoft.Azure.Cosmos" Version="3.8.0" />
    <PackageReference Include="Microsoft.Azure.DocumentDB.Core" Version="2.10.1" />
  </ItemGroup>

So I suggest you update the package version first. If this is not possible, I suggest that you recreate the demo for testing. Perhaps the other part of the code interfered.

Invalid URI: The format of the URI cannot be determined

ConfigurationManager.AppSettings["FTP"] is an invalid URI. You need to fix that.

You probably need to add ftp to the url in the app settings.
Like this "ftp://192.168.1.1:21"

In the end call GetResponse

using (var resp = (FtpWebResponse) ftpRequest.GetResponse()){
        Console.WriteLine(resp.StatusCode);
}

nombre + @"//Images//test" does not create a valid url. You are using double /

Also make sure directory Images exists.

Invalid URI: The format of the URI could not be determined - C#

You have to use UriKind.Relative

myResourceDictionary.Source = new Uri("../Resources/Styles/Shared.xaml",  UriKind.Relative);