Development of the catering system for winform loading and flash processing and moving of borderless forms

This article will mainly share with you the problems encountered during the development of the 'catering system' and will summarize the experiences of this project in the future, hoping to help you!

1. Flash processing of form loading-this problem may be applied to winform.ProgramProblems frequently encountered during development, but some forms flash problems are obvious and serious-at this time we can adopt optimization methods, such: compress the image size in the form (if an image is used in the form )..., however, we may try to optimize and find that the problem has not been greatly improved. The following describes how to solve the problem in this project:

-- Figure 1

-- Figure 2

The above two figures correspond to the following respectively: Log On (frmlogin) and the main form (using MDI, the main form is actually: frmmain (MDI container) + frmindex). frmlogin switches to the main form, if direct switching is performed, the main form will flash obviously during loading-because it is equivalent to loading and displaying both frmmain (MDI container) and frmindex forms at the same time, A large background image is used in the frmindex form. [Solution: When you want to switch to the main form in frmlogin, use timer to control-first set the main form to completely transparent, 1 S (timer time interval (the loading of the main form can be completed within the time interval), and then set the main form to opacity.CodeAs follows:

Code

  Private  Frmmain FRM  =     Null  ;

  Private     Void  Picloginbox_click (  Object  Sender, eventargs E)
{
Isshowloading (  True );
  This  . Picloginbox. Enabled  =     False  ;
  This  . Lblloading. Text  =     "  Loading System. Please wait...  "  ;
Timer_load.start ();
}

  Private    Void  Timer_load_tick (  Object  Sender, eventargs E)
{
  Try  
{
  If  (FRM  ! =  Null  )
{
Timer_load.stop ();
  This  . Hide ();
FRM. Opacity  =    1  ;  //  Set the normal display of the form  
  Isshowloading (  False  );
}
  Else  
{
FRM  =     New  Frmmain ();
FRM. Opacity =     0  ;  //  Set the form to completely transparent  
  FRM. Show ();
  This  . Topmost  =     True  ;
}
}
  Catch (Exception ex)
{
Handleerror (Ex );
}
} 

2. move without border form -- paste code directly, demo can be downloaded from csdn: http://hutao123654.download.csdn.net/

Code

  Using  System;
  Using  System. Collections. Generic;
  Using  System. text;

  Namespace Zhiyiform. codefile
{
  Using  System. Windows. forms;
  Internal     Class  Formmove
{
  Private     Bool  Ismousedown  =     False  ;
  Private System. Drawing. Point formlocation;  //  Form Location  
    Private  System. Drawing. Point mouseoffset;  //  Mouse position  
    Private  Form movedform  =     Null ;
  Private  Control conobj  =     Null  ;

  Private  Formmove ()
{}

  ///     <Summary>  
  ///   
  ///    </Summary>  
  ///     <Param name = "movedform">  Form to be moved  </Param>  
  ///     <Param name = "conobj">  Controls for controlling the movement of a form. If it is null, the form itself is used.  </Param>  
    Public Formmove (Form movedform, control conobj)
{
  This  . Movedform  =  Movedform;
  This  . Conobj  =  (Conobj  =  Null  )  ?  Movedform: conobj;
  This  . Conobj. mousedown + =     New  Mouseeventhandler (conobj_mousedown );
  This  . Conobj. mousemove  + =     New  Mouseeventhandler (conobj_mousemove );
  This  . Conobj. mouseup  + =     New Mouseeventhandler (conobj_mouseup );
}


  Private     Void  Conobj_mousedown (  Object  Sender, mouseeventargs E)
{
  If  (E. Button  =  Mousebuttons. Left)
{
Ismousedown  =     True ;
Formlocation  =  Movedform. location;
Mouseoffset  =  Control. mouseposition;
  This  . Conobj. cursor  =  System. Windows. Forms. cursors. sizeall;
}
}

  Private     Void  Conobj_mouseup (  Object Sender, mouseeventargs E)
{
  This  . Conobj. cursor  =  System. Windows. Forms. cursors. default;
Ismousedown  =     False  ;
}

  Private     Void  Conobj_mousemove (  Object Sender, mouseeventargs E)
{
  If  (Ismousedown)
{
  Int  _ X  =     0  ;
  Int  _ Y  =     0  ;
System. Drawing. Point PT  = Control. mouseposition;
_ X  =  Mouseoffset. x  -  PT. X;
_ Y  =  Mouseoffset. Y  -  PT. Y;

Movedform. Location  =     New  System. Drawing. Point (formlocation. x  -  _ X, formlocation. Y -  _ Y );
}
}
}
}