Treeview + Checkboxes (edit)

CheckedListBox

Winforms - Search in for items in CheckedListBox C# - Stack Overflow

Checkbox - WinForms TreeView with both radios and checkboxes - Stack Overflow

RadioListBox: A ListBox with Radio Buttons (Winforms version) - CodeProject

The Best C# Programmer In The World - Benjamin Perkins

Windows Forms Application

Select Text in TextBox Control - Windows Forms .NET Framework | Microsoft Docs

private void MainForm_Load(object sender, EventArgs e)
{
 //Hide or Remove or Disable both Maximize, Minimize button
 this.ControlBox = false;
 this.MaximizeBox = false;
 this.MinimizeBox = false;

 //Disable Resizing WinForms
 this.FormBorderStyle = FormBorderStyle.FixedSingle;

 //Set KeyPreview = true => Using FormClosingEventArgs (MainForm_FormClosing)
 this.KeyPreview = true;
}

protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
 if (keyData == Keys.Escape)
 {
 this.Close();
 return true;
 }
 return base.ProcessCmdKey(ref msg, keyData);
}

private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
{
 if (MessageBox.Show("Are you sure you want to close this program?", "Application", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.No)
 {
 e.Cancel = true;
 }
}

How To Create Login Form In Windows Application Using C# (c-sharpcorner.com)

Going to Next Control by Clicking Enter or Down Key in C# Windows Forms Application (c-sharpcorner.com)

Source Code

benperk/TheBestCSharpProgrammerInTheWorld: The Best C# Programmer In The World - Benjamin Perkins (github.com)

Source Code | The Best C# Programmer In The World - Benjamin Perkins (thebestcsharpprogrammerintheworld.com)

Treeview with checkbox in WPF | The Best C# Programmer In The World - Benjamin Perkins (thebestcsharpprogrammerintheworld.com)

.NET FOLLOWER » Hide a TreeNode’s checkbox in a TreeView (dotnetfollower.com)

.NET FOLLOWER » WinForms: How to hide checkbox of the certain TreeNode in TreeView control (dotnetfollower.com)

http://www.c-sharpcorner.com/UploadFile/c5c6e2/populate-a-treeview-dynamically/

https://stackoverflow.com/questions/361661/populate-treeview-from-database

https://stackoverflow.com/questions/14208944/c-sharp-right-click-on-treeview-nodes

https://stackoverflow.com/questions/2527/find-node-clicked-under-context-menu

http://techbrij.com/display-hierarchical-data-with-treeview-in-asp-net

http://csharphelper.com/blog/2017/04/display-context-menus-for-treeview-items-in-c/

http://csharphelper.com/blog/2017/04/display-tooltips-for-treeview-nodes-in-c/

https://www.codeproject.com/Articles/1077556/Populating-TreeView-up-to-N-Levels-in-Csharp-from

https://support.microsoft.com/en-us/help/810001/how-to-display-a-context-menu-that-is-specific-to-a-selected-treeview

Samples

https://www.codeproject.com/Articles/1077556/Populating-TreeView-up-to-N-Levels-in-Csharp-from

http://www.c-sharpcorner.com/UploadFile/c5c6e2/populate-a-treeview-dynamically/

https://blogs.msmvps.com/deborahk/populating-a-treeview-control-from-a-list/

Other source code for TreeView

https://www.dotnetperls.com/treeview

https://www.codeproject.com/Articles/23115/Working-with-TreeView-Controls

https://www.codeproject.com/Articles/14741/Advanced-TreeView-for-NET

https://www.codeproject.com/Articles/23114/Working-with-TreeView-Controls

http://deepak-sharma.net/2012/02/08/how-to-bind-multiple-sql-server-tables-with-a-treeview-in-a-hierarchical-order/

DateTime

https://www.codeproject.com/Tips/580267/Advanced-DateTimePicker

https://www.codeproject.com/Articles/13613/A-date-control-better-than-DateTimePicker

Recursion

Sample 01

https://stackoverflow.com/questions/9380620/parent-child-hierarchy-tree-view

;
WITH relation ( Id, ParentId, Name, [level], [orderSequence] )
AS ( SELECT Id ,
ParentId ,
Name ,
0 ,
CAST(Id AS VARCHAR(20))
FROM SysMenus
WHERE ParentId IS NULL
UNION ALL
SELECT p.Id ,
p.ParentId ,
p.Name ,
r.[level] + 1 ,
CAST(r.orderSequence + '_' + CAST(p.Id AS VARCHAR) AS VARCHAR(20))
FROM SysMenus p
INNER JOIN relation r ON p.ParentId = r.Id
)
SELECT *
FROM relation
ORDER BY orderSequence;

Sample 02

DECLARE @pc TABLE
(
Id INT ,
ParentId INT ,
Name VARCHAR(80)
);

INSERT INTO @pc
SELECT 1 ,
NULL ,
'Bill'
UNION ALL
SELECT 2 ,
1 ,
'Jane'
UNION ALL
SELECT 3 ,
1 ,
'Steve'
UNION ALL
SELECT 4 ,
2 ,
'Ben'
UNION ALL
SELECT 5 ,
3 ,
'Andrew'
UNION ALL
SELECT 6 ,
NULL ,
'Tom'
UNION ALL
SELECT 7 ,
8 ,
'Dick'
UNION ALL
SELECT 8 ,
6 ,
'Harry'
UNION ALL
SELECT 9 ,
3 ,
'Stu'
UNION ALL
SELECT 10 ,
7 ,
'Joe';


;
WITH r AS ( SELECT Id ,
ParentId ,
Name ,
depth = 0 ,
sort = CAST(Id AS VARCHAR(MAX))
FROM @pc
WHERE ParentId IS NULL
UNION ALL
SELECT pc.Id ,
pc.ParentId ,
pc.Name ,
depth = r.depth + 1 ,
sort = r.sort + CAST(pc.Id AS VARCHAR(30))
FROM r
INNER JOIN @pc pc ON r.Id = pc.ParentId
WHERE r.depth < 32767
)
SELECT tree = REPLICATE('-', r.depth * 3) + r.Name
FROM r
ORDER BY sort
OPTION ( MAXRECURSION 32767 );