ENums and Properties in Custom Controls
I am a former vb/vb.net programmer, new to the entire C (C,C++,C#) thing. I have created a series of custom controls for our software, ther are graphical representations of machines that our software manages. My problem is that I have Custom properties on the controls that are of the custom enumerated type.
ex.
Here is the Variable
public csMeterStyle.grfxAlarms mtrAlarm = csMeterStyle.grfxAlarms.None;
Here is the property
public csMeterStyle.grfxAlarms MeterAlarm
{
get
{
return mtrAlarm;
}
set
{
mtrAlarm = value;
DrawObject();
}
}
Here is the class that contains the property type. THis is just bel;ow the namespace decleration on the control.
public class csMeterStyle
{
public enum Orientation
{
UpDown = 0,
LeftRight = 2
}
public enum grfx3DStyle
{
Flat = 0,
Shaded = 1,
Line = 2
}
public enum grfxQuality
{
HighQuality = 0,
AntiAlias = 1,
HighSpeed = 2,
DefaultQuality = 3,
None = 4
}
public enum grfxState
{
None = 0,
NotAuthorized = 1,
NotPreset = 2,
PresetInProgress = 3,
LowFLowStart = 4,
HighFlow = 5,
LowFlowStop = 6,
BatchStopped = 7,
BatchEnded = 8,
Failed = 9
}
public enum grfxGround
{
None = 0,
NotGrounded = 1,
Grounded = 2,
Emergency = 3
}
public enum grfxAlarms
{
None = 0,
FlowAlarm = 1,
AdtvAlarm = 2,
BlendAlarm = 3,
OverfillAlarm = 4,
Printer = 5
}
public enum grfxType
{
FlowMeter=0,
Propeller=1
}
public enum grfxDirection
{
Left = 0,
Right = 1,
Up = 2,
Down = 3
}
}
The problem that I am getting is when I drop the Custom Control on a Form and then
view the all Tasks, in the initialize Component code, where the code is setting the value of the custom property, it gives me this error
:The variable 'grfxAlarms' is either undeclared or was never assigned.
What am I doing wrong here, this stuff works great in VB.net.
Answers (2)
0
I know in c# you can do something like this
// If there is selected items do this
if (lisbox.items.selected != null)
{
// Code for your program here if the listbox is selected
}
// If there are no items selected then display this
else
{
// Error display code here
}
You could maybe set up an error checker that way?
0 thank you for replaying my letter but:
1-customer.id is an interger value declare in my customer class
2-rd[0]
only have single value from the stored procedure (select min(id) from customer )
the problem is when there is no data in the table it return Null i try to put all my code in
TRY{}
and
CATCH{}
but i doesnt work ,if you have ny idea to this setuation i need it very much in my project
thanks again
0 I might be of some help....i'm still learning this feel free to correct me :D.
customer.id <= is this customer id an int?
=convert.toint32(rd[0].tostring) <= your trying to convert an array of customer ids to an int?
I'm not sure elaborate on this subject. If your seeing this message it's because you have a string value somewhere, you might need more converts or something.