C# get windows user app data folder path

 Hi folks,

Today I will explain to get the folder path of the windows user specific app data for storing any program (app) based information in C# (.NET Framework, .NET CORE, .NET 5)

Source

using System;

using System.IO;

namespace NETFrameworkConsoleApp1

{

    class Program

    {

        static void Main(string[] args)

        {

            string dir = Path.Combine(

                Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),

                "FolderName"

            );

            Console.WriteLine("User Appdata Path: \n " + dir);

            Console.ReadLine();

        }

    }

}

Hope this helps you to customize your requirement.

References

https://docs.microsoft.com/en-us/dotnet/api/system.environment?view=net-5.0

Please share your comments and feedback to psrdotcom@gmail.com

Connect to remote Oracle database server from RedHat Linux 7 using Oracle InstaClient

Hi friends,

I have come across a situation, where I need to connect to remote Oracle database server from RedHat Enterprise Linux (RHEL) 7. I found a way of using the Oracle InstaClient instead of installing the full Oracle DB which internally consists of Client.

Pre-requesites

1. Linux mahcine (I tried with RHEL 7) with following softwares
• Java (JAVA_HOME should be available)
• Development Tools (RHEL 7 tools like gcc etc.)
2. Another machine where Oracle server is installed with the following config
• Database schema should be available
• Users should be available instead of system/sysdba users
3. Both machines shall be reachable to each other via ping.

Note: You should know the database server SID/service name.

Procedure

Download

1. Download the insta client from Oracle Official Page
2. In my case, I have downloaded the "Instant Client for Linux x86-64"
3. Accept the license agreement
4. Click "oracle-instantclient18.3-basic-18.3.0.0.0-1.x86_64.rpm" to download
5. Optionally, you can download the "oracle-instantclient18.3-sqlplus-18.3.0.0.0-1.x86_64.rpm" to have sqlplus command line utility for testing
6. Alternatively, you can download the zip files and download the same to install.
7. In my case, I am going with RPMs.

Install

• Install the downloaded RPMs
• #> yum install oracle-instantclient18.3-basic-18.3.0.0.0-1.x86_64.rpm
• #> yum install oracle-instantclient18.3-sqlplus-18.3.0.0.0-1.x86_64.rpm
• While installing, it asks for locations, accept the defaults by pressing the "Enter" button

Note: If any dependencies are there, please install those.

Environment Variables

• Create a oracle_env.sh file and setup your variables
• #> gedit /etc/profile.d/oracle_env.sh

export ORACLE_HOME=/usr/lib/oracle//client/
export TNS_ADMIN=/usr/lib/oracle//client/
export PATH=$ORACLE_HOME/bin:$PATH
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH

• Save your file
• Source your file with following command
• #> source /etc/profile.d/oracle_env.sh

tnsnames.ora

• Create tnsnames.ora file in your $ORACLE_HOME with following syntax

localsid = (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = )(PORT = ))
    (CONNECT_DATA =
      (SID = )
    )
  )

• Instead of SID, you can use SERVICE_NAME also.

Connect

• You can test the connection
• #> sqlplus @

You should be able to connect to your remote database.

Hope, it is useful for you.

Please send your comments and feedback to psrdotcom@gmail.com

PhoneGap Installation and running Sample Application on iOS

Pre-requisites

Softwares

•     iOS SDK

•     Xcode command line tools

•     Node.js

•     Cordova (Zip)

Setup Environment Variables

•     NODEJS_HOME

•     CORDOVA_IOS

PATH Environment Variable Update

1) Open a terminal prompt

2) Type sudo vi /etc/launchd.conf (note: this file might not yet exist)

3) Put contents like the following into the file

# Set environment variables here so they are available globally to all apps

# (and Terminal), including those launched via Spotlight.

#

# After editing this file run the following command from the terminal to update

# environment variables globally without needing to reboot.

# NOTE: You will still need to restart the relevant application (including

# Terminal) to pick up the changes!

# grep -E "^setenv" /etc/launchd.conf | xargs -t -L 1 launchctl

#

# See http://www.digitaledgesw.com/node/31

# and http://stackoverflow.com/questions/135688/setting-environment-variables-in-os-x/

#

# Note that you must hardcode the paths below, don't use enviroment variables.

# You also need to surround multiple values in quotes, see MAVEN_OPTS example below.

#

# Nodejs Installed path. By default the path is your home directory->.npm directory path

setenv NODEJS_HOME $HOME/.npm

# Choose the location where you have unzipped the cordova iOS folder

setenv CORDOVA_IOS /cordova-ios

PATH Environment Variable Update

create .bash_profile file in your home folder

Enter the following content

#!/bin/bash

export PATH=$PATH:$NODEJS_HOME:$CORDOVA_IOS/bin

Install phonegap

If you are behind a proxy please set the proxy to npm (Node.js) command

Syntax:-

(For HTTP) $ npm config set proxy http://proxy.company.com:port

(For HTTPS) $ npm config set https-proxy http://proxy.company.com:port

Run the install command

$ sudo npm install -g phonegap

$ sudo npm install -g cordova

Note: If you face any errors

• Remove the .npm directory from the home folder
• Upgrade npm (sudo npm install -g npm)
• Clear the global npm cache (sudo npm cache clear)
• Clear the user npm cache (npm cache clear)

Create Project

Syntax: phonegap create

$ phonegap create hello com.example.hello "HelloWorld"

By default the skeleton folder structure will be created.

Note: if you didn’t get the default skeleton (www, js, css folders and other files), please copy from the sample-hello-world project of phonegap to your www project folder

$ cd hello

$ cordova platform add ios

$ phonegap build ios

Adding Plugins to your project

Pre-requisites

            •           Install Git

Tip: If you are behind a proxy then please add it your configuration

Syntax: git config —global http.proxy http://proxyusername:proxypassword@server.company:port

Ex: git config —global http.proxy http://abc:123@xyz.com:8081

            •           Add git\bin to your PATH environment variable

            •           You need to download the git files from https://git-wip-us.apache.org. So make sure that the above specified URL is not blocked by your firewall

            •           Navigate to your project directory in command prompt by changing the directory

cd

Note:

If you have some issues download cordova zip (unzip cordova-ios zip) and copy it to your home directory-> ~/.cordova/lib/ios/cordova/3.2.0/

Install Plugin

Syntax: phonegap local plugin add

Ex:- phonegap local plugin add https://git-wip-us.apache.org/repos/asf/cordova-plugin-device.git

Tip: If this doesn’t run then try with cordova

Syntax: cordova plugin add

Ex:- cordova plugin add https://git-wip-us.apache.org/repos/asf/cordova-plugin-device.git

Add the Feature to config.xml (Ex: Accelerometer)

    name="Accelerometer">

        name="ios-package" value="CDVAccelerometer" />

   

Remove Plugin

Syntax: phonegap local plugin remove

Ex:- phonegap local plugin remove https://git-wip-us.apache.org/repos/asf/cordova-plugin-device.git

Tip: If this doesn’t run then try with cordova

Syntax: cordova plugin remove

Ex:- cordova plugin remove https://git-wip-us.apache.org/repos/asf/cordova-plugin-device.git

Alternative

You can install “plugman” to plug and play with plugins by following this link

Using Plugman to Manage Plugins

Note: plugman doesn’t take proxy

References

http://docs.phonegap.com/en/3.2.0/guide_platforms_ios_index.md.html#iOS%20Platform%20Guide

http://docs.phonegap.com/en/3.2.0/plugin_ref_plugman.md.html#Using%20Plugman%20to%20Manage%20Plugins

http://phonegap.com/install/

http://jjasonclark.com/how-to-setup-node-behind-web-proxy

http://teusink.blogspot.nl/2013/07/guide-phonegap-3-android-windows.html

http://docs.phonegap.com/en/3.2.0/cordova_accelerometer_accelerometer.md.html#Accelerometer

http://docs.phonegap.com/en/edge/guide_cli_index.md.html#The%20Command-Line%20Interface

PhoneGap Installation and running Sample Application on Windows

Pre-requisites

Softwares

1.       Node.js

2.       Ant (Zip)

3.       Java SDK 1.7

4.       Android SDK

5.       Eclipse (Zip)

6.       Cordova (Zip)

Setup Environment Variables

1.       NODEJS_HOME

2.       ANT_HOME

3.       JAVA_HOME

4.       ANDROID_SDK

5.       CORDOVA_ANDROID

PATH Environment Variable Update

Add NODEJS\bin;ANT_HOME\bin;JAVA_HOME\bin;ANDROID_SDK\tools;ANDROID_SDK\platform-tools

Install phonegap

If you are behind a proxy please set the proxy to npm (Node.js) command

Syntax:-

(HTTP) C:\> npm config set proxy http://proxy.company.com:port

(HTTPS) C:\> npm config set https-proxy http://proxy.company.com:port

Run the install command

C:\> npm install –g phonegap
C:\> npm install –g cordova

Note: If you get any ”shasum (Checksum)” error, then please

i)                    clear the npm and npm-cache directories from %User%/AppData/Roaming folder

ii)                  Install the latest npm version

Currently it is 1.3.21

npm install https://registry.npmjs.org/npm/-/npm-1.3.21.tgz
npm install -g phonegap

Create Project

Syntax: phonegap create

Ex: phonegap create FirstPhnGpPrj com.pg.firstphngpprj PhoneGapPrj1

·         Now it will create some folders and corresponding files (HTML, CSS, JS)

·         Change the directory to your project directory

o   Ex:- C:\> cd FirstPhnGpPrj

Add Platform

Syntax: cordova platform add

Ex:- C:\FirstPhnGpPrj> cordova platform add android

Tip:

If it’s not working then you need to install the cordova (npm install –g cordova)

Copy the cordova-android\bin from your downloaded&extracted zip file to %User%\.cordova\bin

Run Phonegap for Individual Platform

Syntax: phonegap run

Ex:- C:\FirstPhnGpPrj> phonegap run android

1.       By now, you will be getting your Android project hierarchy in your project_folder\platforms\android\

2.       Import the existing android code from your Eclipse

3.       Create\manage AVD

4.       Run the project

Adding Plugins to your project

Pre-requisites

·         Install Git

Tip: If you are behind a proxy then please add it your configuration

Syntax: git config –global http.proxy http://proxyusername:proxypassword@server.company:port

Ex: git config –global http.proxy http://abc:123@xyz.com:8081

·         Add git\bin to your PATH environment variable

·         You need to download the git files from https://git-wip-us.apache.org. So make sure that the above specified URL is not blocked by your firewall

·         Navigate to your project directory in command prompt by changing the directory

cd

Install Plugin

Syntax: phonegap local plugin add

Ex:- phonegap local plugin add https://git-wip-us.apache.org/repos/asf/cordova-plugin-device.git

Tip: If this doesn’t run then try with cordova

Syntax: cordova plugin add

Ex:- cordova plugin add https://git-wip-us.apache.org/repos/asf/cordova-plugin-device.git

Remove Plugin

Syntax: phonegap local plugin remove

Ex:- phonegap local plugin remove https://git-wip-us.apache.org/repos/asf/cordova-plugin-device.git

Tip: If this doesn’t run then try with cordova

Syntax: cordova plugin remove

Ex:- cordova plugin remove https://git-wip-us.apache.org/repos/asf/cordova-plugin-device.git

Alternative

You can install “plugman” to plug and play with plugins by following this link

Using Plugman to Manage Plugins

References

http://phonegap.com/install/

http://jjasonclark.com/how-to-setup-node-behind-web-proxy

http://teusink.blogspot.nl/2013/07/guide-phonegap-3-android-windows.html

http://docs.phonegap.com/en/3.2.0/plugin_ref_plugman.md.html#Using%20Plugman%20to%20Manage%20Plugins

http://docs.phonegap.com/en/3.2.0/cordova_accelerometer_accelerometer.md.html#Accelerometer