Here Mudassar Ahmed Khan has explained with an example, how to check uncheck all (select unselect all) CheckBoxes in CheckedListBox in Windows Forms (WinForms) Application using C# and VB.Net.

The check uncheck all functionality will be done using an additional CheckBox that will act as Check All CheckBox for the CheckedListBox in Windows Forms (WinForms) Application using C# and VB.Net.

Here Mudassar Ahmed Khan has explained with an example, how to check uncheck all (select unselect all) CheckBoxes in ASP.Net CheckBoxList using C# and VB.Net.

The check uncheck all functionality will be done using an additional CheckBox that will act as Check All CheckBox for the ASP.Net CheckBoxList control.

Here Mudassar Ahmed Khan has explained with an example, how to check whether CheckBox in GridView is checked or not in ASP.Net using C# and VB.Net.

When the Button is clicked, a loop will be executed over GridView Rows and then it will be determined whether the CheckBox inside the GridView Row is checked or not in ASP.Net.

Here Mudassar Ahmed Khan has explained with an example, how to implement at-least one CheckBox required validation in AngularJS.

When the Submit Button is clicked, the Model for each CheckBox in the Group will be referenced and using FOR loop, it will be validated that at-least one CheckBox is required to be checked from the Group of CheckBoxes using AngularJS.