opening a window form from another form programmatically

Question

I am making a Windows Forms application  I have a form  I want to open a new form at run time from the original form on a button click  And then close this new form  after 2 3 sec  programatically but from a thread other than gui main thread     Can anybody guide me how to do it   Will the new form affect or hinder the things going on in the original main form    if yes than how to stop it

User · Answer

You just need to use Dispatcher to perform graphical operation from a thread other then UI thread  I don t think that this will affect behavior of the main form  This may help you   Accessing UI Control from BackgroundWorker Thread

User · Answer

I would do it like this    var form2   new Form2    form2 Show      and to close current form I would use   this Hide    instead of   this close      check out this Youtube channel  link for easy start-up tutorials you might find it helpful if u are a beginner

User · Answer

This is an old question  but answering for gathering knowledge  We have an original form with a button to show the new form     The code for the button click is below  private void button1 Click object sender  EventArgs e        New Form new Form   new New Form        new Form Show        Now when click is made  New Form is shown  Since  you want to hide after 2  seconds we are adding a onload event to the new form designer   this Load    new System EventHandler this OnPageLoad     This OnPageLoad function runs when that form is loaded  In NewForm cs    public partial class New Form   Form       private Timer formClosingTimer       private void OnPageLoad object sender  EventArgs e                formClosingTimer   new Timer        Creating a new timer          formClosingTimer Tick    new EventHandler CloseForm      Defining tick event to invoke after a time period         formClosingTimer Interval   2000     Time Interval in miliseconds         formClosingTimer Start       Starting a timer           private void CloseForm object sender  EventArgs e                formClosingTimer Stop       Stoping timer  If we dont stop  function will be triggered in regular intervals         this Close       Closing the current form           In this new form   a timer is used to invoke a method which closes that form   Here is the new form which automatically closes after 2 seconds  we will be able operate on both the forms where no interference between those two forms     For your knowledge   form close   will free the memory and we can never interact with that form again form hide   will just hide the form  where the code part can still run   For more details about timer refer this link  https   docs microsoft com en-us dotnet api system timers timer view netframework-4 7 2

User · Answer

This might also help   void ButtQuitClick object sender  EventArgs e        QuitWin form   new QuitWin        form Show        Change ButtQuit to your button name and also change QuitWin to the name of the form that you made   When the button is clicked it will open another window  you will need to make another form and a button on your main form for it to work

User · Answer

private void btnchangerate Click object sender  EventArgs e                this Hide       current form will hide         Form1 fm   new Form1      another form will open         fm Show              on click btn current form will hide and new form will open

User · Answer

To open from with button click please add the following code in the button event handler  var m   new Form1    m Show      Here Form1 is the name of the form which you want to open   Also to close the current form  you may use  this close

[c#] opening a window form from another form programmatically

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