stopping the same form from loading 2 times ?

Question

i have a form that opens when i press a button.. i want to prevent the form from being opened 2 or more times each time the button is clicked how do i check if the form is currently open before opening another one so if the form is open it will pop up a message box saying form already in use etc.. Thanks MrXs

mrxs1999 · Answer

Thankyou guys i will give it a try :) MrXs

Mykonine · Answer

The easiest way I can think of is to have a single class field. If it's null create a new instance and display it. If it isn't null do nothing. Then attach a delegate to the event so that the field is disposed and null again once you close the form. For example class Form1 { yourForm formVariable; public void button1_Click (object sender System.EventArgs e) { if (formVariable != null) { formVariable = new yourForm(...); formVariable.Closed += new System.EventArgs(formVariable_Closed); formVariable.Show(); } } public void formVariable_Closed(...) { formVariable.Dispose(); formVariable = null; } }

david 0 · Answer

Put a check in your button event....