4) Now add the newly created mode for your display device, the structure of the command is “xrandr –addmode DisplayId Resolution”, you should replace the DisplayId for the id you got in step 1 and the resolution from what you got in
xrandr –addmode HDMI-2 “2560x1080_60.00”
Add New Resolution To Display
5) Set the new resolution
Set The New Resolution
6) So far we added the new resolution and associated it to the monitor that we want, this is not permanent it will just work until you reboot, so to make these changes permanent you need to edit your profile using the following command
gedit ~/.profile
Paste the commands from step 3 and 4 and save the file
Sometimes you want to send a zip with your visual studio solution or project, but after you archive your files you realize that the file size is huge, well worry no more you can use the following script (a .bat file) to clear all the temporary files in your visual studio solution
just save the following code in a ms-dos bat file, name the file ClearTeam.bat
rem start of the script
@echo off
for /d /r . %%d in (bin,obj,packages) do @if exist "%%d" rd /s/q "%%d"
FOR /R %%H IN (*.log) DO del "%%H"
FOR /r %%G IN (*.bak) DO del "%%G"
FOR /R %%J IN (*.suo) DO del "%%J"
IF EXIST .vs rd .vs /s/q
rem end of the script
to run it, just double click in the bat file or execute it but call the file name in console, in this case, ClearTeam.bat
I have been using XPO from DevExpress since day one. For me is the best O.R.M in the dot net world, so when I got the news that XPO was going to be free of charge I was really happy because that means I can use it in every project without adding cost for my customers.
Nowadays all my customer needs some type of mobile development, so I have decided to master the combination of XPO and Xamarin
Now there is a problem when using XPO and Xamarin and that is the network topology, database connections are no designed for WAN networks.
Let’s take MS SQL server as an example, here are the supported communication protocols
TCP/IP.
Named Pipes
To quote what Microsoft web site said about using the protocols above in a WAN network
In a fast-local area network (LAN) environment, Transmission Control Protocol/Internet Protocol (TCP/IP) Sockets and Named Pipes clients are comparable with regard to performance. However, the performance difference between the TCP/IP Sockets and Named Pipes clients becomes apparent with slower networks, such as across wide area networks (WANs) or dial-up networks. This is because of the different ways the interprocess communication (IPC) mechanisms communicate between peers.”
So, what other options do we have? Well if you are using the full DotNet framework you can use WCF.
So, it looks like WCF is the solution here since is mature and robust communication framework but there is a problem, the implementation of WCF for mono touch (Xamarin iOS) and mono droid (Xamarin Android)
You can read about Xamarin limitations in the following links
I don’t want to go into details about how the limitation of each platform affects XPO and WCF but basically the main limitation is the ability to use reflection and emit new code which is needed to generate the WCF client, also in WCF there are problems in the serialization behaviors.
So basically, what we need to do is to replace the WCF layer with some other technology to communicate to the database server
The technology I’ve selected for this AspNetCore which I would say is a really nice technology that is modern, multi-platform and easy to use. Here below you can see what is the architecture of the solution
AspNetCore
Rest API
So, what we need basically is to be able to communicate the data layer with the data store through a network architecture.
The network architecture that I have chosen is a rest API which is one of the strong fronts of AspNetCore. The rest API will work as the server that forward the communication from XPO to the Database and vice versa, you can find a project template of the server implementation here https://www.jocheojeda.com/download/560/ this implementation references one nuget where I have written the communication code, you can fine the nuget here https://nuget.bitframeworks.com/feeds/main/BIT.Xpo.AgnosticDataStore.Server/19.1.5.1
