Problem assigning event handler to object.event

[moondaddy]

C# 2.0

I have declared some event arguments like this:

public class ModeStateChange dEventArgs : EventArgs
{
Gen.DataState myState;

public ModeStateChange dEventArgs() { }

public ModeStateChange dEventArgs(Gen. DataState val)
{
myState = val;
}

public Gen.DataState MyState
{
get { return myState; }
}
}
In a business object I declare the event and use it like this:

Public class BizClass
{

public event EventHandler<Mo deStateChangedE ventArgs>
ModeStateChange dRaised;
protected virtual void
OnModeStateChan gedRaised(ModeS tateChangedEven tArgs e)
{
try
{
EventHandler<Mo deStateChangedE ventArgs> handler =
ModeStateChange dRaised;
if (handler != null)
{
handler(this, e);
}
}
catch (Exception ex)
{
ExceptionHandle r.ErrLog(ex);
}
}

//And I raise the event like this:

Void SomeMethod()
{
ModeStateChange dEventArgs arg = new
ModeStateChange dEventArgs(myMo deState);
OnModeStateChan gedRaised(arg);
}
}

Now is a list class I want to create instances of BizClass, assign and event
handler to them and then add them to the list.
Public class ListOfBizClass : BindingList< BizClass >, IBindingList
{
//This is where I need help...
public event EventHandler<Mo deStateChangedE ventArgs>
ModeStateChange dRaised;
protected virtual void
OnModeStateChan gedRaised(ModeS tateChangedEven tArgs e)
{
try
{
EventHandler<Mo deStateChangedE ventArgs> handler =
ModeStateChange dRaised;
if (handler != null)
{
handler(this, e);
}
}
catch (Exception ex)
{
ExceptionHandle r.ErrLog(ex);
}
}
public void GetListFromData base()
{
base.Clear();
dsContactMngr ds = oData.PersonGet RecShort();
foreach (dsContactMngr. tbPersonShortLi stRow dr in
ds.tbPersonShor tList)
{
BizClass obj = new BizClass (dr.ID, dr.FName, dr.LName);
//This is where I get a compile error: 'new
EventHandler(On ModeStateChange dRaised)'
//Compile error says: 'No overload for 'OnModeStateCha ngedRaised' matches
delegate'
obj.ModeStateCh angedRaised += new
EventHandler(On ModeStateChange dRaised);
base.Add(obj);
}
}
)

Can someone shed explain what I need to do here?

THANKS!
--
mo*******@nospa m.nospam

[Daniel O'Connell [C# MVP]]

public void GetListFromData base()
{
base.Clear();
dsContactMngr ds = oData.PersonGet RecShort();
foreach (dsContactMngr. tbPersonShortLi stRow dr in
ds.tbPersonShor tList)
{
BizClass obj = new BizClass (dr.ID, dr.FName, dr.LName);
//This is where I get a compile error: 'new
EventHandler(On ModeStateChange dRaised)'
//Compile error says: 'No overload for 'OnModeStateCha ngedRaised' matches
delegate'
obj.ModeStateCh angedRaised += new
EventHandler(On ModeStateChange dRaised);
base.Add(obj);
}
}
)

Can someone shed explain what I need to do here?

Thats because the proper signature for EventHandler<T> would be
protected virtual void OnModeStateChan gedRaised(objec t o,
ModeStateChange dEventArgs e);

There is always an object parameter at the front which will contain the
object itself.
THANKS!
--
mo*******@nospa m.nospam

[moondaddy]

I've tried just about every possible syntax I can think of including what I
think you are talking about. Using my code sample, could you please write
out exactly what it would look like?

Thanks.

--
mo*******@nospa m.nospam
"Daniel O'Connell [C# MVP]" <[e-mail]> wrote in
message news:eG******** ******@TK2MSFTN GP03.phx.gbl...

public void GetListFromData base()
{
base.Clear();
dsContactMngr ds = oData.PersonGet RecShort();
foreach (dsContactMngr. tbPersonShortLi stRow dr in
ds.tbPersonShor tList)
{
BizClass obj = new BizClass (dr.ID, dr.FName, dr.LName);
//This is where I get a compile error: 'new
EventHandler(On ModeStateChange dRaised)'
//Compile error says: 'No overload for 'OnModeStateCha ngedRaised' matches
delegate'
obj.ModeStateCh angedRaised += new
EventHandler(On ModeStateChange dRaised);
base.Add(obj);
}
}
)

Can someone shed explain what I need to do here?

Thats because the proper signature for EventHandler<T> would be
protected virtual void OnModeStateChan gedRaised(objec t o,
ModeStateChange dEventArgs e);

There is always an object parameter at the front which will contain the
object itself.

THANKS!
--
mo*******@nospa m.nospam

[moondaddy]

Ok I finaly figured it out. I downloaded the code for Rocky Lhotka's c#2.0
clsa and was able to understand it better by studing his code. For anyone
interested, here's what worked:
public class ModeStateChange dEventArgs : EventArgs
{
Gen.DataState myState;

public ModeStateChange dEventArgs() { }

public ModeStateChange dEventArgs(Gen. DataState val)
{
myState = val;
}

public virtual Gen.DataState MyState
{
get { return myState; }
}
}
In a business object I declare the event and use it like this:

Public class BizClass
{
public event ModeStateChange dEventHandler ModeStateChange dRaised;

protected void OnModeStateChan gedRaised(objec t sender,
ModeStateChange dEventArgs e)
{
try
{
if e!= null)
{
ModeStateChange dRaised(this, e);
}
}
catch (Exception ex)
{
ExceptionHandle r.ErrLog(ex);
}
}
//And I raise the event like this:

Void SomeMethod()
{
ModeStateChange dEventArgs arg = new
ModeStateChange dEventArgs(myMo deState);
OnModeStateChan gedRaised(this, arg);
}
}
=============== =============== =============== ============

Now in a list class I want to create instances of BizClass, assign and event
handler to them and then add them to the list.
Public class ListOfBizClass : BindingList< BizClass >, IBindingList
{
public event EventHandler<Mo deStateChangedE ventArgs>
ModeStateChange dRaised;

protected void OnModeStateChan gedRaised(objec t sender,
ModeStateChange dEventArgs e)
{
try
{
if (e != null)
{
//do something
Console.WriteLi ne("It works (protected void
OnModeStateChan gedRaised(objec t sender, ModeStateChange dEventArgs e)): " +
e.MyState.ToStr ing());
}
}
catch (Exception ex)
{
ExceptionHandle r.ErrLog(ex);
}
}
//Load this list class with a bunch of biz objects and assign the event to
each object (suto code...)
public void GetListFromData base()
{
base.Clear();
dsContactMngr ds = oData.PersonGet RecShort();

foreach (dsContactMngr. tbPersonShortLi stRow dr in
ds.tbPersonShor tList)
{
BizClass obj = new BizClass(dr.ID, dr.FName, dr.LName);
obj.ModeStateCh angedRaised += new
ModeStateChange dEventHandler(O nModeStateChang edRaised);
base.Add(obj);
}
}

//TA DA ! ! !






--
mo*******@nospa m.nospam
"moondaddy" <mo*******@nosp am.nospam> wrote in message
news:OG******** ******@TK2MSFTN GP05.phx.gbl...

I've tried just about every possible syntax I can think of including what
I think you are talking about. Using my code sample, could you please
write out exactly what it would look like?

Thanks.

--
mo*******@nospa m.nospam
"Daniel O'Connell [C# MVP]" <[e-mail]> wrote in
message news:eG******** ******@TK2MSFTN GP03.phx.gbl...

public void GetListFromData base()
{
base.Clear();
dsContactMngr ds = oData.PersonGet RecShort();
foreach (dsContactMngr. tbPersonShortLi stRow dr in
ds.tbPersonShor tList)
{
BizClass obj = new BizClass (dr.ID, dr.FName, dr.LName);
//This is where I get a compile error: 'new
EventHandler(On ModeStateChange dRaised)'
//Compile error says: 'No overload for 'OnModeStateCha ngedRaised'
matches delegate'
obj.ModeStateCh angedRaised += new
EventHandler(On ModeStateChange dRaised);
base.Add(obj);
}
}
)

Can someone shed explain what I need to do here?

Thats because the proper signature for EventHandler<T> would be
protected virtual void OnModeStateChan gedRaised(objec t o,
ModeStateChange dEventArgs e);

There is always an object parameter at the front which will contain the
object itself.

THANKS!
--
mo*******@nospa m.nospam