How to get current cpu usage in C# and VB.NET

January 29, 2015

To get current cpu usage in C# and VB.NET you can use the following snippet.

Sample C#

public static string GetCurrentCpuUsage()
{
	var cpuCounter = new PerformanceCounter
	{
		CategoryName = "Processor",
		CounterName = "% Processor Time",
		InstanceName = "_Total"
	};
	cpuCounter.NextValue();
	System.Threading.Thread.Sleep(1000);
	return (cpuCounter.NextValue() + "%");
}

Sample VB.NET

Public Shared Function GetCurrentCpuUsage() As String
	Dim cpuCounter = New PerformanceCounter() With { _
		Key .CategoryName = "Processor", _
		Key .CounterName = "% Processor Time", _
		Key .InstanceName = "_Total" _
	}
	cpuCounter.NextValue()
	System.Threading.Thread.Sleep(1000)
	Return (cpuCounter.NextValue() + "%")
End Function

How to use Doubleclick in Devexpress Gridview in C# and VB.NET

Administrator

January 29, 2015

1 Comment

Using doubleclick events in the Devexpress Gridview Control is a simple task.
There are 2 different ways of doing this. The variant you choose, depends on the Gridview’s gridView.OptionsBehavior.Editable property. If this property is set to false you have to use the DoubleClick event. If this property is set to true you have to use the ShownEditor and HiddenEditor event. I will also give an example on how to combine both methods, if you are using both (true and false) on the gridView.OptionsBehavior.Editable.

Samples

OptionsBehavior.Editable set to False

C# Sample

private void gridView1_DoubleClick(object sender, EventArgs e)
{
	GridView view = (GridView)sender;
	Point pt = view.GridControl.PointToClient(MousePosition);
	GridHitInfo info = view.CalcHitInfo(pt);
	if ((info.InRow || info.InRowCell) &amp;&amp; info.Column != null)
	{
		Object cellValue = view.GetRowCellValue(info.RowHandle, info.Column);
		MessageBox.Show(string.Format("Made a doubleclick at rowhandle: {0}, columnhandle: {1}, value: {2}.", info.RowHandle, info.Column.ColumnHandle, cellValue));
	}
}

private void gridView1_DoubleClick(object sender, EventArgs e)

{

GridView view = (GridView)sender;

Point pt = view.GridControl.PointToClient(MousePosition);

GridHitInfo info = view.CalcHitInfo(pt);

if ((info.InRow || info.InRowCell) && info.Column != null)

{

Object cellValue = view.GetRowCellValue(info.RowHandle, info.Column);

MessageBox.Show(string.Format("Made a doubleclick at rowhandle: {0}, columnhandle: {1}, value: {2}.", info.RowHandle, info.Column.ColumnHandle, cellValue));

}

VB.NET Sample

Private Sub GridView1_DoubleClick( sender As Object,  e As EventArgs) Handles GridView1.DoubleClick
        Dim view As GridView = DirectCast(sender, GridView)
        Dim pt As Point = view.GridControl.PointToClient(MousePosition)
        Dim info As GridHitInfo = view.CalcHitInfo(pt)
        If (info.InRow OrElse info.InRowCell) AndAlso info.Column IsNot Nothing Then
	        Dim cellValue As [Object] = view.GetRowCellValue(info.RowHandle, info.Column)
	        MessageBox.Show(String.Format("Made a doubleclick at rowhandle: {0}, columnhandle: {1}, value: {2}.", info.RowHandle, info.Column.ColumnHandle, cellValue))
        End If
End Sub

Private Sub GridView1_DoubleClick( sender As Object, e As EventArgs) Handles GridView1.DoubleClick

Dim view As GridView = DirectCast(sender, GridView)

Dim pt As Point = view.GridControl.PointToClient(MousePosition)

Dim info As GridHitInfo = view.CalcHitInfo(pt)

If (info.InRow OrElse info.InRowCell) AndAlso info.Column IsNot Nothing Then

Dim cellValue As [Object] = view.GetRowCellValue(info.RowHandle, info.Column)

MessageBox.Show(String.Format("Made a doubleclick at rowhandle: {0}, columnhandle: {1}, value: {2}.", info.RowHandle, info.Column.ColumnHandle, cellValue))

End If

End Sub

OptionsBehavior.Editable set to True

When inplace editing is enabled, a click on a grid cell activates the inplace editor (rowedit).
All mouse events will be sent to the editor and cannot be handled by the GridView directly. The DoubleClick event handler is no longer being executed.

C# Sample

private void gridView1_ShownEditor(object sender, EventArgs e)
{
	BaseEdit inplaceEditor = ((GridView)sender).ActiveEditor;
	inplaceEditor.DoubleClick += inplaceEditor_DoubleClick;
}

void inplaceEditor_DoubleClick(object sender, EventArgs e)
{
	BaseEdit editor = (BaseEdit)sender;
	GridControl grid = (GridControl)editor.Parent;
	Point pt = grid.PointToClient(Control.MousePosition);
	GridView view = (GridView)grid.FocusedView;
	GridHitInfo info = view.CalcHitInfo(pt);
	if ((info.InRow || info.InRowCell) &amp;&amp; info.Column != null)
	{
		Object cellValue = view.GetRowCellValue(info.RowHandle, info.Column);
		MessageBox.Show(string.Format("Made a doubleclick at rowhandle: {0}, columnhandle: {1}, value: {2}.", info.RowHandle, info.Column.ColumnHandle, cellValue));
	}
}

private void gridView1_HiddenEditor(object sender, EventArgs e)
{
	if (sender.GetType() == typeof (BaseEdit))
	{
		BaseEdit editor = (BaseEdit) sender;
		editor.DoubleClick -= inplaceEditor_DoubleClick;
	}
}

private void gridView1_ShownEditor(object sender, EventArgs e)

{

BaseEdit inplaceEditor = ((GridView)sender).ActiveEditor;

inplaceEditor.DoubleClick += inplaceEditor_DoubleClick;

}

void inplaceEditor_DoubleClick(object sender, EventArgs e)

{

BaseEdit editor = (BaseEdit)sender;

GridControl grid = (GridControl)editor.Parent;

Point pt = grid.PointToClient(Control.MousePosition);

GridView view = (GridView)grid.FocusedView;

GridHitInfo info = view.CalcHitInfo(pt);

if ((info.InRow || info.InRowCell) && info.Column != null)

{

Object cellValue = view.GetRowCellValue(info.RowHandle, info.Column);

MessageBox.Show(string.Format("Made a doubleclick at rowhandle: {0}, columnhandle: {1}, value: {2}.", info.RowHandle, info.Column.ColumnHandle, cellValue));

}

private void gridView1_HiddenEditor(object sender, EventArgs e)

{

if (sender.GetType() == typeof (BaseEdit))

{

BaseEdit editor = (BaseEdit) sender;

editor.DoubleClick -= inplaceEditor_DoubleClick;

}

VB.NET Sample

Private Sub gridView1_ShownEditor(sender As Object, e As EventArgs) Handles GridView1.ShownEditor
	Dim inplaceEditor As BaseEdit = DirectCast(sender, GridView).ActiveEditor
	AddHandler inplaceEditor.DoubleClick, AddressOf inplaceEditor_DoubleClick
End Sub

Private Sub inplaceEditor_DoubleClick(sender As Object, e As EventArgs)
	Dim editor As BaseEdit = DirectCast(sender, BaseEdit)
	Dim grid As GridControl = DirectCast(editor.Parent, GridControl)
	Dim pt As Point = grid.PointToClient(Control.MousePosition)
	Dim view As GridView = DirectCast(grid.FocusedView, GridView)
	Dim info As GridHitInfo = view.CalcHitInfo(pt)
	If (info.InRow OrElse info.InRowCell) AndAlso info.Column IsNot Nothing Then
		Dim cellValue As Object = view.GetRowCellValue(info.RowHandle, info.Column)
		MessageBox.Show(String.Format("Made a doubleclick at rowhandle: {0}, columnhandle: {1}, value: {2}.", info.RowHandle, info.Column.ColumnHandle, cellValue))
	End If
End Sub

Private Sub gridView1_HiddenEditor(sender As Object, e As EventArgs) Handles GridView1.HiddenEditor
	If sender.GetType() = GetType(BaseEdit) Then
		Dim editor As BaseEdit = DirectCast(sender, BaseEdit)
		RemoveHandler editor.DoubleClick, AddressOf inplaceEditor_DoubleClick
	End If
End Sub

Private Sub gridView1_ShownEditor(sender As Object, e As EventArgs) Handles GridView1.ShownEditor

Dim inplaceEditor As BaseEdit = DirectCast(sender, GridView).ActiveEditor

AddHandler inplaceEditor.DoubleClick, AddressOf inplaceEditor_DoubleClick

End Sub

Private Sub inplaceEditor_DoubleClick(sender As Object, e As EventArgs)

Dim editor As BaseEdit = DirectCast(sender, BaseEdit)

Dim grid As GridControl = DirectCast(editor.Parent, GridControl)

Dim pt As Point = grid.PointToClient(Control.MousePosition)

Dim view As GridView = DirectCast(grid.FocusedView, GridView)

Dim info As GridHitInfo = view.CalcHitInfo(pt)

If (info.InRow OrElse info.InRowCell) AndAlso info.Column IsNot Nothing Then

Dim cellValue As Object = view.GetRowCellValue(info.RowHandle, info.Column)

MessageBox.Show(String.Format("Made a doubleclick at rowhandle: {0}, columnhandle: {1}, value: {2}.", info.RowHandle, info.Column.ColumnHandle, cellValue))

End If

End Sub

Private Sub gridView1_HiddenEditor(sender As Object, e As EventArgs) Handles GridView1.HiddenEditor

If sender.GetType() = GetType(BaseEdit) Then

Dim editor As BaseEdit = DirectCast(sender, BaseEdit)

RemoveHandler editor.DoubleClick, AddressOf inplaceEditor_DoubleClick

End If

End Sub

OptionsBehavior.Editable set to True or False at Runtime

C# Sample

private void gridView1_DoubleClick(object sender, EventArgs e)
{
	GridView view = (GridView)sender;
	Point pt = view.GridControl.PointToClient(MousePosition);
	GridHitInfo info = view.CalcHitInfo(pt);
	if ((info.InRow || info.InRowCell) && info.Column != null)
	{
		DoSomething(view, info);
	}
}

private void DoSomething(GridView view, GridHitInfo info)
{
	Object cellValue = view.GetRowCellValue(info.RowHandle, info.Column);
	MessageBox.Show(string.Format("Made a doubleclick at rowhandle: {0}, columnhandle: {1}, value: {2}.", info.RowHandle, info.Column.ColumnHandle, cellValue));
}

private void gridView1_ShownEditor(object sender, EventArgs e)
{
	BaseEdit inplaceEditor = ((GridView)sender).ActiveEditor;
	inplaceEditor.DoubleClick += inplaceEditor_DoubleClick;
}

void inplaceEditor_DoubleClick(object sender, EventArgs e)
{
	BaseEdit editor = (BaseEdit)sender;
	GridControl grid = (GridControl)editor.Parent;
	Point pt = grid.PointToClient(Control.MousePosition);
	GridView view = (GridView)grid.FocusedView;
	GridHitInfo info = view.CalcHitInfo(pt);
	if ((info.InRow || info.InRowCell) && info.Column != null)
	{
		DoSomething(view, info);
	}
}

private void gridView1_HiddenEditor(object sender, EventArgs e)
{
	if (sender.GetType() == typeof (BaseEdit))
	{
		BaseEdit editor = (BaseEdit) sender;
		editor.DoubleClick -= inplaceEditor_DoubleClick;
	}
}

private void gridView1_DoubleClick(object sender, EventArgs e)

{

GridView view = (GridView)sender;

Point pt = view.GridControl.PointToClient(MousePosition);

GridHitInfo info = view.CalcHitInfo(pt);

if ((info.InRow || info.InRowCell) && info.Column != null)

{

DoSomething(view, info);

}

private void DoSomething(GridView view, GridHitInfo info)

{

Object cellValue = view.GetRowCellValue(info.RowHandle, info.Column);

MessageBox.Show(string.Format("Made a doubleclick at rowhandle: {0}, columnhandle: {1}, value: {2}.", info.RowHandle, info.Column.ColumnHandle, cellValue));

}

private void gridView1_ShownEditor(object sender, EventArgs e)

{

BaseEdit inplaceEditor = ((GridView)sender).ActiveEditor;

inplaceEditor.DoubleClick += inplaceEditor_DoubleClick;

}

void inplaceEditor_DoubleClick(object sender, EventArgs e)

{

BaseEdit editor = (BaseEdit)sender;

GridControl grid = (GridControl)editor.Parent;

Point pt = grid.PointToClient(Control.MousePosition);

GridView view = (GridView)grid.FocusedView;

GridHitInfo info = view.CalcHitInfo(pt);

if ((info.InRow || info.InRowCell) && info.Column != null)

{

DoSomething(view, info);

}

private void gridView1_HiddenEditor(object sender, EventArgs e)

{

if (sender.GetType() == typeof (BaseEdit))

{

BaseEdit editor = (BaseEdit) sender;

editor.DoubleClick -= inplaceEditor_DoubleClick;

}

VB.NET Sample

Private Sub gridView1_DoubleClick(sender As Object, e As EventArgs)
	Dim view As GridView = DirectCast(sender, GridView)
	Dim pt As Point = view.GridControl.PointToClient(MousePosition)
	Dim info As GridHitInfo = view.CalcHitInfo(pt)
	If (info.InRow OrElse info.InRowCell) AndAlso info.Column IsNot Nothing Then
		DoSomething(view, info)
	End If
End Sub

Private Sub DoSomething(view As GridView, info As GridHitInfo)
	Dim cellValue As Object = view.GetRowCellValue(info.RowHandle, info.Column)
	MessageBox.Show(String.Format("Made a doubleclick at rowhandle: {0}, columnhandle: {1}, value: {2}.", info.RowHandle, info.Column.ColumnHandle, cellValue))
End Sub

Private Sub gridView1_ShownEditor(sender As Object, e As EventArgs)
	Dim inplaceEditor As BaseEdit = DirectCast(sender, GridView).ActiveEditor
	AddHandler inplaceEditor.DoubleClick, AddressOf inplaceEditor_DoubleClick
End Sub

Private Sub inplaceEditor_DoubleClick(sender As Object, e As EventArgs)
	Dim editor As BaseEdit = DirectCast(sender, BaseEdit)
	Dim grid As GridControl = DirectCast(editor.Parent, GridControl)
	Dim pt As Point = grid.PointToClient(Control.MousePosition)
	Dim view As GridView = DirectCast(grid.FocusedView, GridView)
	Dim info As GridHitInfo = view.CalcHitInfo(pt)
	If (info.InRow OrElse info.InRowCell) AndAlso info.Column IsNot Nothing Then
		DoSomething(view, info)
	End If
End Sub

Private Sub gridView1_HiddenEditor(sender As Object, e As EventArgs)
	If sender.GetType() = GetType(BaseEdit) Then
		Dim editor As BaseEdit = DirectCast(sender, BaseEdit)
		RemoveHandler editor.DoubleClick, AddressOf inplaceEditor_DoubleClick
	End If
End Sub

Private Sub gridView1_DoubleClick(sender As Object, e As EventArgs)

Dim view As GridView = DirectCast(sender, GridView)

Dim pt As Point = view.GridControl.PointToClient(MousePosition)

Dim info As GridHitInfo = view.CalcHitInfo(pt)

If (info.InRow OrElse info.InRowCell) AndAlso info.Column IsNot Nothing Then

DoSomething(view, info)

End If

End Sub

Private Sub DoSomething(view As GridView, info As GridHitInfo)

Dim cellValue As Object = view.GetRowCellValue(info.RowHandle, info.Column)

MessageBox.Show(String.Format("Made a doubleclick at rowhandle: {0}, columnhandle: {1}, value: {2}.", info.RowHandle, info.Column.ColumnHandle, cellValue))

End Sub

Private Sub gridView1_ShownEditor(sender As Object, e As EventArgs)

Dim inplaceEditor As BaseEdit = DirectCast(sender, GridView).ActiveEditor

AddHandler inplaceEditor.DoubleClick, AddressOf inplaceEditor_DoubleClick

End Sub

Private Sub inplaceEditor_DoubleClick(sender As Object, e As EventArgs)

Dim editor As BaseEdit = DirectCast(sender, BaseEdit)

Dim grid As GridControl = DirectCast(editor.Parent, GridControl)

Dim pt As Point = grid.PointToClient(Control.MousePosition)

Dim view As GridView = DirectCast(grid.FocusedView, GridView)

Dim info As GridHitInfo = view.CalcHitInfo(pt)

If (info.InRow OrElse info.InRowCell) AndAlso info.Column IsNot Nothing Then

DoSomething(view, info)

End If

End Sub

Private Sub gridView1_HiddenEditor(sender As Object, e As EventArgs)

If sender.GetType() = GetType(BaseEdit) Then

Dim editor As BaseEdit = DirectCast(sender, BaseEdit)

RemoveHandler editor.DoubleClick, AddressOf inplaceEditor_DoubleClick

End If

End Sub

If you have any questions or suggestions feel free to rate this snippet, post a comment or Contact Us via Email.

Related links:

NuGet: Failed to initialize the PowerShell Host

Administrator

January 29, 2015

1 Comment

Today i recieved the following Nuget Error while trying to install Automapper.

Failed to initialize the PowerShell host. If your PowerShell execution policy setting is set to AllSigned, open the Package Manager Console to initialize the host first.

To fix that, close all Visual Studio instances and open the Powershell Console as Administrator. Enter Set-ExecutionPolicy RemoteSigned or Set-ExecutionPolicy Unrestricted. Be aware that you need to set the execution policy on both the x86 and the x64 Powershell Console.

A more simple solution would be to put the code below in a File with an .reg extension and execute that.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\PowerShell\1\ShellIds\Microsoft.PowerShell]
"ExecutionPolicy"="Unrestricted"


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PowerShell\1\ShellIds\Microsoft.PowerShell]
"ExecutionPolicy"="Unrestricted"

Now start Visual Studio and Try Again, if the error appears again, try running Visual Studio as Administrator.

How to use Node Doubleclick in Devexpress Treelist in C# and VB.NET

Administrator

January 29, 2015

1 Comment

How to use Node Doubleclick in Devexpress Treelist in C# and VB.NET you can use the following snippet.

Sample C#

private void treeList1_DoubleClick(object sender, EventArgs e) 
{
	var treeList = sender as TreeList;
	var hitInfo = treeList.CalcHitInfo(treeList.PointToClient(MousePosition));
	if(hitInfo.Node != null) 
	{
		//do something
	}
}

Sample VB.NET

Private Sub treeList1_DoubleClick(sender As Object, e As EventArgs)
	Dim treeList = TryCast(sender, TreeList)
	Dim hitInfo = treeList.CalcHitInfo(treeList.PointToClient(MousePosition))
			'do something
	If hitInfo.Node IsNot Nothing Then
	End If
End Sub

How to hide a Console Window in C# and VB.NET

Administrator

January 28, 2015

2 Comments

To hide a Console Window in C# and VB.NET you can use the following snippet.

Sample C#

public static class Consoles
{
	[DllImport("user32.dll")]
	public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

	[DllImport("user32.dll")]
	public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

	public static void SetConsoleWindowVisibility(bool visible, IntPtr hWnd)
	{
		ShowWindow(hWnd, !visible ? 0 : 1);
	}
}

usage:

var hWnd = Consoles.FindWindow(null, Console.Title);
Consoles.SetConsoleWindowVisibility(false, hWnd);

Sample VB.NET

Public NotInheritable Class Consoles
	Private Sub New()
	End Sub
	<DllImport("user32.dll")> _
	Public Shared Function FindWindow(lpClassName As String, lpWindowName As String) As IntPtr
	End Function

	<DllImport("user32.dll")> _
	Public Shared Function ShowWindow(hWnd As IntPtr, nCmdShow As Integer) As Boolean
	End Function

	Public Shared Sub SetConsoleWindowVisibility(visible As Boolean, hWnd As IntPtr)
		ShowWindow(hWnd, If(Not visible, 0, 1))
	End Sub
End Class

usage:

Dim hWnd = Consoles.FindWindow(Nothing, Console.Title)
Consoles.SetConsoleWindowVisibility(False, hWnd)

How to check if Date is Workday in C# and VB.NET

Administrator

January 28, 2015

1 Comment

To check if Date is Workday in C# and VB.NET you can use the following snippet.

Sample C#

public static bool IsWorkDay(DateTime date, bool isWorkDaySaturday)
{
	if (date == null) {  throw new ArgumentNullException("date");}
	switch (date.DayOfWeek)
	{
		case DayOfWeek.Saturday:
			return isWorkDaySaturday;
		case DayOfWeek.Sunday:
			return false;
		default:
			return true;
	}
}

Sample VB.NET

Public Shared Function IsWorkDay(date As DateTime, isWorkDaySaturday As Boolean) As Boolean
	If date Is Nothing Then
		Throw New ArgumentNullException("date")
	End If
	Select Case date.DayOfWeek
		Case DayOfWeek.Saturday
			Return isWorkDaySaturday
		Case DayOfWeek.Sunday
			Return False
		Case Else
			Return True
	End Select
End Function

How to scale a Size Object by percentage in C# and VB.NET

Administrator

January 27, 2015

1 Comment

To scale a Size Object by percentage in C# and VB.NET you can use the following snippet.

Sample C#

public static Size Scale(this Size size, float scalePercent)
{
	if (Math.Abs(scalePercent - 1) < float.Epsilon)
	{
		return size;
	}

	var height = (int) (size.Height*(scalePercent/100));
	var width = (int)(size.Width * (scalePercent / 100));

	return new Size(width, height);
}

Sample VB.NET

<System.Runtime.CompilerServices.Extension> _
Public Shared Function Scale(size As Size, scalePercent As Single) As Size
	If Math.Abs(scalePercent - 1) < Single.Epsilon Then
		Return size
	End If

	Dim height = CInt(size.Height * (scalePercent / 100))
	Dim width = CInt(size.Width * (scalePercent / 100))

	Return New Size(width, height)
End Function

How to get a random Color in C# and VB.NET

Administrator

January 27, 2015

1 Comment

To get a random Color in C# and VB.NET you can use the following snippet.

Sample C#

public static System.Drawing.Color RandomColor()
{
	var rand = new Random();
	var r = rand.Next(0, 256);
	Thread.Sleep(1);
	var g = rand.Next(0, 256);
	Thread.Sleep(1);
	var b = rand.Next(0, 256);
	return System.Drawing.Color.FromArgb(255, r, g, b);
}

Sample VB.NET

Public Shared Function RandomColor() As System.Drawing.Color
	Dim rand As var = New Random
	Dim r As var = rand.Next(0, 256)
	Thread.Sleep(1)
	Dim g As var = rand.Next(0, 256)
	Thread.Sleep(1)
	Dim b As var = rand.Next(0, 256)
	Return System.Drawing.Color.FromArgb(255, r, g, b)
End Function

How to get Devexpress Wizardpage by Name in C# and VB.NET

Administrator

January 27, 2015

1 Comment

To get Devexpress Wizardpage by Name in C# and VB.NET you can use the following snippet.

Sample C#

public static WizardPage GetWizardPageByName(WizardControl wizard, string name)
{
	var controls = wizard.Controls.Find(name, false);
	if (controls.Length > 0 && controls[0] is WizardPage)
	{
		return controls[0] as WizardPage;
	}
	return null;
}

Sample VB.NET

Public Shared Function GetWizardPageByName(wizard As WizardControl, name As String) As WizardPage
	Dim controls = wizard.Controls.Find(name, False)
	If controls.Length > 0 AndAlso TypeOf controls(0) Is WizardPage Then
		Return TryCast(controls(0), WizardPage)
	End If
	Return Nothing
End Function

How to get the Youtube VideoId from Url in C# and VB.NET

Administrator

January 26, 2015

4 Comments

To get the Youtube VideoId from an Url in C# and VB.NET you can use the following snippet.
It matches these 18 type of Youtube Links (Sample Data):

Sample Input

http://youtu.be/AAAAAAAAA01

http://www.youtube.com/embed/watch?feature=player_embedded&v=AAAAAAAAA02

http://www.youtube.com/embed/watch?v=AAAAAAAAA03

http://www.youtube.com/embed/v=AAAAAAAAA04

http://www.youtube.com/watch?v=AAAAAAAAA06

www.youtube.com/watch?v=AAAAAAAAA07

www.youtu.be/AAAAAAAAA08

youtu.be/AAAAAAAAA09

http://www.youtube.com/watch?feature=player_embedded&v=AAAAAAAAA05

http://www.youtube.com/watch?v=i-AAAAAAA14&feature=related

http://www.youtube.com/attribution_link?u=/watch?v=AAAAAAAAA15&feature=share&a=9QlmP1yvjcllp0h3l0NwuA

http://www.youtube.com/attribution_link?a=fF1CWYwxCQ4&u=/watch?v=AAAAAAAAA16&feature=em-uploademail

http://www.youtube.com/attribution_link?a=fF1CWYwxCQ4&feature=em-uploademail&u=/watch?v=AAAAAAAAA17

http://www.youtube.com/v/A-AAAAAAA18?fs=1&rel=0

youtube.com/watch?v=AAAAAAAAA10

http://www.youtube.com/watch/AAAAAAAAA11

http://www.youtube.com/v/AAAAAAAAA12

http://www.youtube.com/v/AAAAAAAAA13

Sample C#

using System.Linq;
using System.Text.RegularExpressions;

namespace de.fesslersoft.YoutubeRegexTest
{
    internal static class Youtube
    {
        private const string YoutubeLinkRegex = "(?:.+?)?(?:\\/v\\/|watch\\/|\\?v=|\\&v=|youtu\\.be\\/|\\/v=|^youtu\\.be\\/)([a-zA-Z0-9_-]{11})+";

        internal static string GetVideoId(string input)
        {
            var regex = new Regex(YoutubeLinkRegex, RegexOptions.Compiled);
            foreach (Match match in regex.Matches(input))
            {
                //Console.WriteLine(match);
                foreach (var groupdata in match.Groups.Cast<Group>().Where(groupdata => !groupdata.ToString().StartsWith("http://") && !groupdata.ToString().StartsWith("https://") && !groupdata.ToString().StartsWith("youtu") && !groupdata.ToString().StartsWith("www.")))
                {
                    return groupdata.ToString();
                }
            }
            return string.Empty;
        }
    }
}

Sample VB.NET

Imports System.Linq
Imports System.Text.RegularExpressions
 
Namespace de.fesslersoft.YoutubeRegexTest
    Friend NotInheritable Class Youtube
        Private Sub New()
        End Sub
        Private Const YoutubeLinkRegex As String = "(?:.+?)?(?:\/v\/|watch\/|\?v=|\&v=|youtu\.be\/|\/v=|^youtu\.be\/)([a-zA-Z0-9_-]{11})+"
 
        Friend Shared Function GetVideoId(input As String) As String
            Dim regex = New Regex(YoutubeLinkRegex, RegexOptions.Compiled)
            For Each match As Match In regex.Matches(input)
                For Each data As Group In match.Groups.Cast(Of Group)().Where(Function(groupdata) Not groupdata.ToString().StartsWith("http://") AndAlso Not groupdata.ToString().StartsWith("https://") AndAlso Not groupdata.ToString().StartsWith("youtu") AndAlso Not groupdata.ToString().StartsWith("www."))
                    Return data.ToString()
                Next
            Next
            Return String.Empty
        End Function
    End Class
End Namespace

Output / Sample

var urlList = new List<String>
{
	"http://youtu.be/AAAAAAAAA01",
	"http://www.youtube.com/embed/watch?feature=player_embedded&v=AAAAAAAAA02",
	"http://www.youtube.com/embed/watch?v=AAAAAAAAA03",
	"http://www.youtube.com/embed/v=AAAAAAAAA04",
	"http://www.youtube.com/watch?feature=player_embedded&v=AAAAAAAAA05",
	"http://www.youtube.com/watch?v=AAAAAAAAA06",
	"www.youtube.com/watch?v=AAAAAAAAA07",
	"www.youtu.be/AAAAAAAAA08",
	"youtu.be/AAAAAAAAA09",
	"youtube.com/watch?v=AAAAAAAAA10",
	"http://www.youtube.com/watch/AAAAAAAAA11",
	"http://www.youtube.com/v/AAAAAAAAA12",
	"http://www.youtube.com/v/AAAAAAAAA13",
	"http://www.youtube.com/watch?v=i-AAAAAAA14&feature=related",
	"http://www.youtube.com/attribution_link?u=/watch?v=AAAAAAAAA15&feature=share&a=9QlmP1yvjcllp0h3l0NwuA",
	"http://www.youtube.com/attribution_link?a=fF1CWYwxCQ4&u=/watch?v=AAAAAAAAA16&feature=em-uploademail",
	"http://www.youtube.com/attribution_link?a=fF1CWYwxCQ4&feature=em-uploademail&u=/watch?v=AAAAAAAAA17",
	"http://www.youtube.com/v/A-AAAAAAA18?fs=1&rel=0"
};

foreach (var entry in urlList)
{
	Console.WriteLine(Youtube.GetVideoId(entry));
}
Console.Read();

will result in the follwing output:

Youtube VideoId Regex Console Window Output

A simpler but less matching solution can be found here: How to get the VideoID of a youtube video using Regex

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Month: January 2015

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