I don't understand how the menu works

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hi now i m working on window base program but i need a help.when i open a window from menu when i click on that menu again then i got that window that is already open in c#

Posted 17-Sep-11 0:06am

prakash00060

Updated 17-Sep-11 0:45am

#realJSOP

v3

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Tejas Vaishnav 17-Sep-11 6:47am

Hello friend Please Rate My Ans if you like it

2 solutions

Solution 1

You need to store the from instance as a class level variable. When you run the menu handler, check if the variable is null and only open the new window if it is. Then store the new form instance in the variable for later.
You will also want to handle the form FormClosed event to return the saved instance to null.

Posted 17-Sep-11 0:14am

OriginalGriff

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prakash00060 17-Sep-11 6:29am

can you give me any example sir

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Tejas Vaishnav · Accepted Answer · 2011-09-17T00:42:00

You have to create a class or file where all the global variables have been declared and that file or class has been assessed in whole application
your all child form will be declared there.

C#

public class GlobalVar
{
    private static MyChildForm _My;
    public MyChildForm MyChild
    {
        get
        {
             if(_my == null)
             {
                 _my = new MyChildForm();
                 return _my; 
              }
             else
             {
                 return _my;
             }
         }
    }
}

now in your menu item click event write this code

C#

GlobalVar glob = new GlobalVar();

private void toolStripMenuItem1_Click(object sender, EventArgs e)
{
      glob.MyChild.Show();
}