Here Mudassar Ahmed Khan has explained with an example, how to close (hide) Bootstrap Modal Popup Window using jQuery.

The Close Button is assigned a jQuery Click event handler and when the Close Button is clicked, the Bootstrap Modal Popup Window will be hidden (closed) using modal function and passing the parameter value hide.

Here Mudassar Ahmed Khan has explained with an example, how to close (hide) Bootstrap Modal Popup Window from Server Side (Code Behind) in ASP.Net using C# and VB.Net.

The Bootstrap Modal Popup is closed (hidden) by calling the modal function with parameter value hide using RegisterStartupScript method of ClientScript class on Sever Side (Code Behind) in ASP.Net.

Here Mudassar Ahmed Khan has explained with an example, how to solve the problem of Bootstrap Modal Popup Auto Closes on PostBack in ASP.Net using C# and VB.Net.

Bootstrap Modal Popup is opened from Client Side and hence when PostBack happens and Page refreshes, the Bootstrap Modal Popup disappears.

Hence in order to keep the Bootstrap Modal Popup across PostBacks, it has to be re-opened after PostBack from Server Side (Code Behind) using RegisterStartupScript method of ClientScript class.

Here Mudassar Ahmed Khan has explained with an example, how to Show and Hide (Open and Close) Bootstrap Modal Popup Window using jQuery.

There will be two Buttons i.e. first to show (open) the Bootstrap Modal Popup Window on Client Side using jQuery while second Button will be placed inside the Bootstrap Modal Popup Window and will be used to hide (close) the Bootstrap Modal Popup Window using jQuery.