Is there a TypeConverter that converts Doubles to percent values in a PropertyGrid? The Windows.Forms.F orm.Opacity property seems to use the TypeConverter that I want.
Thank you,
Lance
Thank you,
Lance
-
-
Re: Percent TypeConverter
View this thread from Jay Harlow and Charles Law. It might help.
-------------
Hi Jay
Thanks for confirming what I was beginning to suspect.
Using the example that I just used to Armin, I would then have
<code>
Public Structure MyValueClass
Public Function ToPercent() As Double
End Function
Public Function ToAbsolute() As Integer
End Function
End Structure
Dim d As Double
Dim i As Integer
d = mc.Value.ToPerc ent()
i = mc.Value.ToAbso lute()
</code>
showing that I must explicitly call ToAbsolute rather than just write
i = mc.Value
Charles
"Jay B. Harlow [MVP - Outlook]" <Jay_Harlow_MVP @msn.com> wrote in
message
news:eZoCs0dMEH A.2468@TK2MSFTN GP11.phx.gbl...
[color=blue]
> Charles,
> Neither VB.NET 2002 nor VB.NET 2003 support what you are attempting, per[/color]
se.
[color=blue]
>
> You could always:
>
> Public Structure MyValueClass
>
> Public Function ToPercent() As String
> End Function
>
> Public Function ToInteger() As Integer
> End Function
>
> End Structure
>[/color]
[color=blue][color=green]
> > i = mc.Value.ToInte ger()
> > Textbox1.Text = mc.Value.ToPerc ent()[/color]
>
>[/color]
[color=blue]
> With VB.NET 2005 (Whidbey) we will be able to override CType, the[/color]
conversion
[color=blue]
> operator, so you will be able to do something like (based on the CTP[/color]
release
[color=blue]
> of Whidbey):
>
> Public Structure MyValueClass
>
> Public Function ToPercent() As String
> End Function
>
> Public Function ToInteger() As Integer
> End Function
>
> Public Shared Widening Operator CType(value As MyValueClass) As
> Integer
> Return value.ToInteger ()
> End Operator
>
> Public Shared Narrowing Operator CType(value As Integer) As
> MyValueClass
> Return New MyValueClass(va lue)
> End Operator
>
> End Structure
>
> i = mc.Value
> mc.Value = CType(i, MyValueClass)
>
> A Widening CType operator does not require CType, while a Narrowing CType
> operator does.
>
> Hope this helps
> Jay
>
> "Charles Law" <blank@nowhere. com> wrote in message
> news:eycXnhcMEH A.1192@TK2MSFTN GP11.phx.gbl...[/color]
[color=blue][color=green]
> > In a VB.NET app, I can write
> >
> > Dim s As String = 3.ToString
> >
> > This is because 3 is of type Int32, which is a structure, which has a[/color][/color]
[color=blue]
> method[/color]
[color=blue][color=green]
> > ToString.
> >
> > I would also like to be able to write
> >
> > Dim s As String = 3.ToPercent
> >
> > by supplying my own implementation of ToPercent. If I could do this,[/color][/color]
then
[color=blue]
> I[/color]
[color=blue][color=green]
> > would be able to do what I ultimately wish to do, and that is write
> > something like the following:
> >
> > Dim mc As New MyClass
> > Dim i As Integer
> >
> > i = mc.Value
> > Textbox1.Text = mc.Value.ToPerc ent
> >
> > I have tried to make Value of type MyValueClass, for example, which[/color][/color]
[color=blue]
> inherits[/color]
[color=blue][color=green]
> > from Int32, but Int32 is not inheritable, so that is a non-starter. In[/color][/color]
any
[color=blue][color=green]
> > case, the first assignment gives a compile time error because there is[/color][/color]
no
[color=blue][color=green]
> > default property of MyValueClass, and I can't set one unless it takes
> > parameters (which it doesn't).
> >
> > Can anyone suggest how this might be done?
> >
> > TIA
> >
> > Charles
> >
> >[/color]
>[/color]
[color=blue]
>[/color]
"ljlevend" <ljlevend@discu ssions.microsof t.com> wrote in message
news:545C88E3-41D2-418A-B9D4-F79C720E82AC@mi crosoft.com:[color=blue]
> Is there a TypeConverter that converts Doubles to percent values in a
> PropertyGrid? The Windows.Forms.F orm.Opacity property seems to use the
> TypeConverter that I want.
>
> Thank you,
> Lance[/color]
-
Re: Percent TypeConverter
Thanks for the help, but that isn't quite what I'm looking for. I need a TypeConverter class rather than a technique that converts a value. I could create my own TypeConverter class, but I want to make sure that there isn't a standard percent TypeConverter before doing so.
Lance
"scorpion53 061" wrote:
[color=blue]
> View this thread from Jay Harlow and Charles Law. It might help.
>
> -------------
>
> Hi Jay
>
> Thanks for confirming what I was beginning to suspect.
>
> Using the example that I just used to Armin, I would then have
>
> <code>
> Public Structure MyValueClass
>
> Public Function ToPercent() As Double
> End Function
>
> Public Function ToAbsolute() As Integer
> End Function
>
> End Structure
>
> Dim d As Double
> Dim i As Integer
>
> d = mc.Value.ToPerc ent()
> i = mc.Value.ToAbso lute()
> </code>
>
> showing that I must explicitly call ToAbsolute rather than just write
>
> i = mc.Value
>
> Charles
>
>
> "Jay B. Harlow [MVP - Outlook]" <Jay_Harlow_MVP @msn.com> wrote in
> message
> news:eZoCs0dMEH A.2468@TK2MSFTN GP11.phx.gbl...
>[color=green]
> > Charles,
> > Neither VB.NET 2002 nor VB.NET 2003 support what you are attempting, per[/color]
>
> se.
>[color=green]
> >
> > You could always:
> >
> > Public Structure MyValueClass
> >
> > Public Function ToPercent() As String
> > End Function
> >
> > Public Function ToInteger() As Integer
> > End Function
> >
> > End Structure
> >[/color]
>[color=green][color=darkred]
> > > i = mc.Value.ToInte ger()
> > > Textbox1.Text = mc.Value.ToPerc ent()[/color]
> >
> >[/color]
>[color=green]
> > With VB.NET 2005 (Whidbey) we will be able to override CType, the[/color]
>
> conversion
>[color=green]
> > operator, so you will be able to do something like (based on the CTP[/color]
>
> release
>[color=green]
> > of Whidbey):
> >
> > Public Structure MyValueClass
> >
> > Public Function ToPercent() As String
> > End Function
> >
> > Public Function ToInteger() As Integer
> > End Function
> >
> > Public Shared Widening Operator CType(value As MyValueClass) As
> > Integer
> > Return value.ToInteger ()
> > End Operator
> >
> > Public Shared Narrowing Operator CType(value As Integer) As
> > MyValueClass
> > Return New MyValueClass(va lue)
> > End Operator
> >
> > End Structure
> >
> > i = mc.Value
> > mc.Value = CType(i, MyValueClass)
> >
> > A Widening CType operator does not require CType, while a Narrowing CType
> > operator does.
> >
> > Hope this helps
> > Jay
> >
> > "Charles Law" <blank@nowhere. com> wrote in message
> > news:eycXnhcMEH A.1192@TK2MSFTN GP11.phx.gbl...[/color]
>[color=green][color=darkred]
> > > In a VB.NET app, I can write
> > >
> > > Dim s As String = 3.ToString
> > >
> > > This is because 3 is of type Int32, which is a structure, which has a[/color][/color]
>[color=green]
> > method[/color]
>[color=green][color=darkred]
> > > ToString.
> > >
> > > I would also like to be able to write
> > >
> > > Dim s As String = 3.ToPercent
> > >
> > > by supplying my own implementation of ToPercent. If I could do this,[/color][/color]
>
> then
>[color=green]
> > I[/color]
>[color=green][color=darkred]
> > > would be able to do what I ultimately wish to do, and that is write
> > > something like the following:
> > >
> > > Dim mc As New MyClass
> > > Dim i As Integer
> > >
> > > i = mc.Value
> > > Textbox1.Text = mc.Value.ToPerc ent
> > >
> > > I have tried to make Value of type MyValueClass, for example, which[/color][/color]
>[color=green]
> > inherits[/color]
>[color=green][color=darkred]
> > > from Int32, but Int32 is not inheritable, so that is a non-starter. In[/color][/color]
>
> any
>[color=green][color=darkred]
> > > case, the first assignment gives a compile time error because there is[/color][/color]
>
> no
>[color=green][color=darkred]
> > > default property of MyValueClass, and I can't set one unless it takes
> > > parameters (which it doesn't).
> > >
> > > Can anyone suggest how this might be done?
> > >
> > > TIA
> > >
> > > Charles
> > >
> > >[/color]
> >[/color]
>[color=green]
> >[/color]
>
> "ljlevend" <ljlevend@discu ssions.microsof t.com> wrote in message
> news:545C88E3-41D2-418A-B9D4-F79C720E82AC@mi crosoft.com:[color=green]
> > Is there a TypeConverter that converts Doubles to percent values in a
> > PropertyGrid? The Windows.Forms.F orm.Opacity property seems to use the
> > TypeConverter that I want.
> >
> > Thank you,
> > Lance[/color]
>
>[/color]
Comment
-
Re: Percent TypeConverter
Thanks for the help, but that isn't quite what I'm looking for. I need a TypeConverter class rather than a technique for converting the value. I could create my own TypeConverter, but I want to make sure that there isn't a standard TypeConverter for converting percents before doing so.
Lance
"scorpion53 061" wrote:
[color=blue]
> View this thread from Jay Harlow and Charles Law. It might help.
>
> -------------
>
> Hi Jay
>
> Thanks for confirming what I was beginning to suspect.
>
> Using the example that I just used to Armin, I would then have
>
> <code>
> Public Structure MyValueClass
>
> Public Function ToPercent() As Double
> End Function
>
> Public Function ToAbsolute() As Integer
> End Function
>
> End Structure
>
> Dim d As Double
> Dim i As Integer
>
> d = mc.Value.ToPerc ent()
> i = mc.Value.ToAbso lute()
> </code>
>
> showing that I must explicitly call ToAbsolute rather than just write
>
> i = mc.Value
>
> Charles
>
>
> "Jay B. Harlow [MVP - Outlook]" <Jay_Harlow_MVP @msn.com> wrote in
> message
> news:eZoCs0dMEH A.2468@TK2MSFTN GP11.phx.gbl...
>[color=green]
> > Charles,
> > Neither VB.NET 2002 nor VB.NET 2003 support what you are attempting, per[/color]
>
> se.
>[color=green]
> >
> > You could always:
> >
> > Public Structure MyValueClass
> >
> > Public Function ToPercent() As String
> > End Function
> >
> > Public Function ToInteger() As Integer
> > End Function
> >
> > End Structure
> >[/color]
>[color=green][color=darkred]
> > > i = mc.Value.ToInte ger()
> > > Textbox1.Text = mc.Value.ToPerc ent()[/color]
> >
> >[/color]
>[color=green]
> > With VB.NET 2005 (Whidbey) we will be able to override CType, the[/color]
>
> conversion
>[color=green]
> > operator, so you will be able to do something like (based on the CTP[/color]
>
> release
>[color=green]
> > of Whidbey):
> >
> > Public Structure MyValueClass
> >
> > Public Function ToPercent() As String
> > End Function
> >
> > Public Function ToInteger() As Integer
> > End Function
> >
> > Public Shared Widening Operator CType(value As MyValueClass) As
> > Integer
> > Return value.ToInteger ()
> > End Operator
> >
> > Public Shared Narrowing Operator CType(value As Integer) As
> > MyValueClass
> > Return New MyValueClass(va lue)
> > End Operator
> >
> > End Structure
> >
> > i = mc.Value
> > mc.Value = CType(i, MyValueClass)
> >
> > A Widening CType operator does not require CType, while a Narrowing CType
> > operator does.
> >
> > Hope this helps
> > Jay
> >
> > "Charles Law" <blank@nowhere. com> wrote in message
> > news:eycXnhcMEH A.1192@TK2MSFTN GP11.phx.gbl...[/color]
>[color=green][color=darkred]
> > > In a VB.NET app, I can write
> > >
> > > Dim s As String = 3.ToString
> > >
> > > This is because 3 is of type Int32, which is a structure, which has a[/color][/color]
>[color=green]
> > method[/color]
>[color=green][color=darkred]
> > > ToString.
> > >
> > > I would also like to be able to write
> > >
> > > Dim s As String = 3.ToPercent
> > >
> > > by supplying my own implementation of ToPercent. If I could do this,[/color][/color]
>
> then
>[color=green]
> > I[/color]
>[color=green][color=darkred]
> > > would be able to do what I ultimately wish to do, and that is write
> > > something like the following:
> > >
> > > Dim mc As New MyClass
> > > Dim i As Integer
> > >
> > > i = mc.Value
> > > Textbox1.Text = mc.Value.ToPerc ent
> > >
> > > I have tried to make Value of type MyValueClass, for example, which[/color][/color]
>[color=green]
> > inherits[/color]
>[color=green][color=darkred]
> > > from Int32, but Int32 is not inheritable, so that is a non-starter. In[/color][/color]
>
> any
>[color=green][color=darkred]
> > > case, the first assignment gives a compile time error because there is[/color][/color]
>
> no
>[color=green][color=darkred]
> > > default property of MyValueClass, and I can't set one unless it takes
> > > parameters (which it doesn't).
> > >
> > > Can anyone suggest how this might be done?
> > >
> > > TIA
> > >
> > > Charles
> > >
> > >[/color]
> >[/color]
>[color=green]
> >[/color]
>
> "ljlevend" <ljlevend@discu ssions.microsof t.com> wrote in message
> news:545C88E3-41D2-418A-B9D4-F79C720E82AC@mi crosoft.com:[color=green]
> > Is there a TypeConverter that converts Doubles to percent values in a
> > PropertyGrid? The Windows.Forms.F orm.Opacity property seems to use the
> > TypeConverter that I want.
> >
> > Thank you,
> > Lance[/color]
>
>[/color]
Comment
-
Re: Percent TypeConverter
Check out the OpacityConverte r class
That's what the opacity property uses
/claes
"ljlevend" <ljlevend@discu ssions.microsof t.com> wrote in message
news:545C88E3-41D2-418A-B9D4-F79C720E82AC@mi crosoft.com...[color=blue]
> Is there a TypeConverter that converts Doubles to percent values in a[/color]
PropertyGrid? The Windows.Forms.F orm.Opacity property seems to use the
TypeConverter that I want.[color=blue]
>
> Thank you,
> Lance[/color]
Comment
-
Re: Percent TypeConverter
That's exactly what I was looking for. Thanks!
"Claes Bergefall" wrote:
[color=blue]
> Check out the OpacityConverte r class
> That's what the opacity property uses
>
> /claes
>
> "ljlevend" <ljlevend@discu ssions.microsof t.com> wrote in message
> news:545C88E3-41D2-418A-B9D4-F79C720E82AC@mi crosoft.com...[color=green]
> > Is there a TypeConverter that converts Doubles to percent values in a[/color]
> PropertyGrid? The Windows.Forms.F orm.Opacity property seems to use the
> TypeConverter that I want.[color=green]
> >
> > Thank you,
> > Lance[/color]
>
>
>[/color]
Comment
Comment