How can Stop if Form Already Open..

Question

Dear,

How can stop if form already open.

For Example i showed my form in panel but when i click its opening again and again so how can i stop this.. when i click one time should be open if i click second time should be not open again..

below my code..

private void Store_information_button_Click(object sender, EventArgs e)
{
try
{
StoresInformation storeinformation = new StoresInformation();

storeinformation.TopLevel = false;
Showing_Data_panel1.Controls.Add(storeinformation);
storeinformation.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
storeinformation.Dock = DockStyle.Fill;
storeinformation.Show();

}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}

Raja T · Answer

Hello Khan, Try like Form fc = Application . OpenForms [ "UpdateWindow" ]; if ( fc != null ) fc . Close (); fm . Show (); more details chekck out below links https://msdn.microsoft.com/en-US/library/system.windows.forms.application.openforms.aspx http://stackoverflow.com/questions/3861602/how-to-check-if-a-windows-form-is-already-open-and-close-it-if-it-is

John Lester Almenanza · Answer

try this code. Form[] formToClose = null; int i = 1; foreach (Form form in Application.OpenForms) { if (form != this) { Array.Resize(ref formToClose, i); formToClose[i - 1] = form; i++; } } if (formToClose != null) for (int j = 0; j formToClose[j].Dispose();

Ranjit Powar · Answer

Sorry there is spelling mistake. bool isFound=false; foreach (Form frm in Application.OpenForms) { if(frm.Name=="YourFormName") isFound=true; } if(!isFound) { //open form here } If your problem solved then accept it as Correct Answer.

Feroz Khan · Answer

No Its not working..

Ranjit Powar · Answer

Just loop through Application. OpenForm collection and check if form present in that collection. If not then opent it. Use below code bool isFound=false; foreach (Form frm in Application.OpenForms) { if(from.Name=="YourFormName") isFound=true; } if(!isFound) { //open form here }