property with defalut value will not be called in auto-generated code, and how to make a property only visible at design time?

[Ryan Liu]

Hi,

What is the best practise to sove this problem:

property with defalut value will not be called in auto-generated code

?

for example

there is a property in a user control

private bool normalMode = false;
public bool NormalMode
{
get
{
return this.normalMode ;
}
set
{
SetAsNormal(val ue);
this.normalMode = value;
}

If I put this user control in a form, in forms InitializeCompo nent(), there
is no code like
userControl1.No rmalMode = false;

so line like SetAsNormal(val ue); will not be called.

What is the best way to solve this? And how to make a property only visible
at design time?

Thanks a lot!
Ryan Liu

[Marc Gravell]

Re the default value, I would simply ensure that this code gets called
in the ctor.

Re the design time... pass.

Marc

[Nicholas Paldino [.NET/C# MVP]]

Ryan,

The only way that this will get called is if you have a value that is
different from the default value. You need to do this:

private bool normalMode = false;

[DefaultValue(fa lse)];
public bool NormalMode
{
get
{
return this.normalMode ;
}
set
{
SetAsNormal(val ue);
this.normalMode = value;
}
}

Then, the designer will set the value for your component in
InitializeCompo nent method when you set a value to something OTHER than the
default value. If it is NOT the default value, then it ^will^ not and
^should^ not be set.

If you have a need for SetAsNormal(val ue) to be called, then in your
constructor, you should call SetAsNormal(nor malMode).

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Ryan Liu" <ad********@onl ine.sh.cnwrote in message
news:ec******** ******@TK2MSFTN GP03.phx.gbl...

Hi,

What is the best practise to sove this problem:

property with defalut value will not be called in auto-generated code

?

for example

there is a property in a user control

private bool normalMode = false;
public bool NormalMode
{
get
{
return this.normalMode ;
}
set
{
SetAsNormal(val ue);
this.normalMode = value;
}

If I put this user control in a form, in forms InitializeCompo nent(),
there
is no code like
userControl1.No rmalMode = false;

so line like SetAsNormal(val ue); will not be called.

What is the best way to solve this? And how to make a property only
visible
at design time?

Thanks a lot!
Ryan Liu