Develop Reference

How to use findElement(By.cssSelector("")) in Visual Studio in Selenium C#

I'm trying to use
driver.findElement(By.cssSelector("....."));
But it doesn't work(cannot use the FindElement with By). Do you know what can replace it? I'm using visual studio 2019 and write in C#
using OpenQA.Selenium.Chrome;
using OpenQA.Selenium.Interactions;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WebDriverTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
var driver = new ChromeDriver();
driver.Navigate().GoToUrl("http://www.marketinginternetdirectory.com/submit.php");
//Find form element to auto fill on form page - Right click on input->inspect
var title_field = driver.FindElement(By.)
}
}
}

You can use xpath https://www.w3schools.com/xml/xpath_intro.asp
For your specific example you can locate title by doing this:
var titleElement = driver.FindElement(By.XPath("//input[#name = 'TITLE']"));
// And if you want to go a step further you might after want to do something like this:
element.SendKeys("YOUR-TITLE");

As per the documentation in By Class the notations is as follows:
CssSelector: Gets a mechanism to find elements by their cascading style sheet (CSS) selector.
Your effective line of code will be:
using OpenQA.Selenium;
var title_field = driver.FindElement(By.CssSelector("svg g rect:nth-child(20)"));
Reference
Selenium C# Webdriver Tutorial

Enable Microphone using NAudio c#

I have this code that uses NAudio to look for all microphones connected on laptop, andwhen I choose one it shows a meter of the sound in a progressbar.
when I gather all device, I collect them in a dropdwon list, my issue is that when I choose the one microphone from the list it will not be activated and display the sound on a meter unless I start WINDOWS SOUND RECORDER which seems to activate the mic.
how to enable or activate the microphone from the code without starting WINDOWS SOUND RECORDER?
here is the code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using NAudio;
using NAudio.CoreAudioApi;
using System.Threading;
using NAudio.Wave;
using NAudio.Mixer;
namespace NaudioVisualizer
{
public partial class Form1 : Form
{
public int a = 1;
public Form1()
{
InitializeComponent();
MMDeviceEnumerator de = new MMDeviceEnumerator();
var device = de.EnumerateAudioEndPoints(DataFlow.All, DeviceState.Active);
comboBox1.Items.AddRange(device.ToArray());
}
private void timer1_Tick(object sender, EventArgs e)
{
if (comboBox1.SelectedItem != null)
{
var device = (MMDevice)comboBox1.SelectedItem;
progressBar1.Value = (int)Math.Round(device.AudioMeterInformation.MasterPeakValue * 100);
}
}
}
}

I had the same problem try to use the following code :
var waveIn = new WaveIn();
waveIn.StartRecording();

Why is the program form not loading when accessing file?

With the below code, I've tested it out and the loading of the form works fine standalone, but when the program goes to check if a file exists, the form doesn't load properly and I'm at a loss as to what to do. Is there another method of checking to see if a file exists that I could use in this instance?
EDIT I've made a new 'startup' form to run the file exists check, but it still doesn't work. Again the form loads, but the contents of the form don't and the form itself freezes.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Timers;
using System.IO;
using System.Collections;
using System.Runtime.InteropServices;
using Microsoft.Win32;
using System.Diagnostics;
using System.Windows.Input;
namespace program1
{
public partial class Startup : Form
{
public Startup()
{
InitializeComponent();
}
private void Startup_Load(object sender, EventArgs e)
{
notifyIcons norm = new notifyIcons();
Settings set = new Settings();
set.Show();
string curFile = Environment.CurrentDirectory + "\\age.txt";
if (File.Exists(curFile))
{
norm.Show();
this.Close();
}
else
{
set.Show();
for (;;)
{
if (File.Exists(curFile)) norm.Show(); this.Close();
Application.DoEvents();
}
}
}
}
}

I have no idea what this code is supposed to do.. but I can tell you why its not working.
while (ageFileExists)
That is never false. Therefore, your loop will continually loop... forever. You need to set it false somehow in the loop. I have no idea what sort of rules govern that though.
The reason the form doesn't load is because the loop never exits.. and so the message loop that makes the window do anything can never continue processing window messages.
If you can give more context around what you're trying to do I could help you with a proper solution. As it stands though, I can only see the problem.

while(ageFileExists)
{
if (File.Exists(curFile)) ageFileExists = true;
set.WindowState = FormWindowState.Normal;
}
If that file exists you have an infinite loop. You never set ageFileExists to false and that loop does nothing at all. And where does that label go? I seriously doubt you need to be using goto. Your code doesn't make much sense as it stands.

By using the following code in the main form, it seemed to work a treat! I think the critical part was Application.DoEvents();
Thanks for all of your assistance
InitializeComponent();
set.Show();
set.WindowState = FormWindowState.Minimized;
string curFile = Environment.CurrentDirectory + "\\age.txt";
if (File.Exists(curFile)) goto Labelx;
set.WindowState = FormWindowState.Normal;
for (; ; ) { Application.DoEvents(); if (File.Exists(curFile)) break; }
set.WindowState = FormWindowState.Minimized;
Labelx:TextReader reader = File.OpenText(Environment.CurrentDirectory + "\\age.txt");

removing image reference from picturebox (C#)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
namespace MyProject
{
public partial class MyForm : Form
{
Process MyProcess;
public MyForm()
{
InitializeComponent();
}
private void MyForm_KeyPress(object sender, KeyPressEventArgs e)
{
switch (e.KeyChar)
{
case 'a':
this.MyPictureBox.Image = null;
this.MyProcess = new Process();
this.MyProcess.StartInfo =
new ProcessStartInfo("\"C:\\Program Files (x86)\\LilyPond\\usr\\bin\\lilypond.exe\"", "--png tmp.ly");
this.MyProcess.Start();
this.MyProcess.WaitForExit();
this.MyPictureBox.Image = new Bitmap("tmp.png");
break;
default:
break;
}
}
}
}
"C:\Program Files (x86)\LilyPond\usr\bin\lilypond.exe" --png tmp.ly command creates tmp.png. When I press a key first time, MyProcess returns 0, but next - returns 1 always. I think the problem is in overwritting file tmp.png, which is using by MyPictureBox, but I have no idea how to repair it. Could you help me?

As far as I know lilypond does not give an option for overwriting using a command line argument. If I'm right then you can include code to delete then png file (if exsists) before MyProcess starts.
if (System.IO.File.Exists(path))
{
System.IO.File.Delete(path);
}

DirectX InvalidCallException unhandled

I am getting an unhandled exception when trying to create a D3d device.
This is literally the whole code in C#. I am just testing and trying to learn directx.
I am getting the Unhandled exception on this line
: device = new Device(0, DeviceType.Hardware, this,CreateFlags.SoftwareVertexProcessing, presentParams);
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
Device device = null; // Create rendering device
PresentParameters presentParams = new PresentParameters();
device = new Device(0, DeviceType.Hardware, this,CreateFlags.SoftwareVertexProcessing, presentParams);
RenderToSurface render = new RenderToSurface(device, 300, 300, Format.D32, true, DepthFormat.D32);
}
private void Form1_Load(object sender, EventArgs e)
{
}
}
}
Kind of blowing my mind because it looks like all the params are right..

needed presentParams.Windowed = true in order for this to work.