ThreadStart parameters

[Mike P]

How do you pass your parameters to the method you have specified for the
threadstart?

System.Threadin g.ThreadStart thdStart = new
System.Threadin g.ThreadStart(M oveMail(new object[] { progress, oItems,
destfolder, objConn });

Where MoveMail has the following parameters :

private void MoveMail(object status)
{
object[] parms = (object[])status;
IProgressCallba ck callback = (IProgressCallb ack)parms[0];
Outlook.Items col = (Outlook.Items) parms[1];
Outlook.MAPIFol der destfolder =
(Outlook.MAPIFo lder)parms[2];
SqlConnection objConn = (SqlConnection) parms[3];



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[Alberto Poblacion]

Re: ThreadStart parameters

"Mike P" <mike.parr@gmai l.comwrote in message
news:Ozt0pn5aHH A.4520@TK2MSFTN GP06.phx.gbl...

How do you pass your parameters to the method you have specified for the
threadstart?

If you have version 2.0 of the framework you can use
ParameterizedTh readStart instead of ThreadStart. Otherwise, the trick is to
create a class with member variables for the parameters and a start method
without parameters inside the class. Create an object from that class, set
the parameters into the member variables, and start the thread from the
parameter-less start method inside the class. This dumy method can then call
your real start method passing to it the parameters from the member
variables.

[Mike P]

Re: ThreadStart parameters

I can't find any online examples that actually show the syntax required
for passing parameters to ParameterizedTh readStart. Here is my code
that I have tried that doesn't work :

System.Threadin g.ThreadStart thdStart = new
System.Threadin g.Parameterized ThreadStart((Mo veMail), new object[] {
progress, oItems, destfolder, objConn });
System.Threadin g.Thread thd1 = new
System.Threadin g.Thread(thdSta rt);
thd1.Start();


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[Jon Skeet [C# MVP]]

Re: ThreadStart parameters

On Mar 21, 9:18 am, Mike P <mike.p...@gmai l.comwrote:

How do you pass your parameters to the method you have specified for the
threadstart?

See http://pobox.com/~skeet/csharp/threads/parameters.shtml

Jon

[Alberto Poblacion]

Re: ThreadStart parameters

"Mike P" <mike.parr@gmai l.comwrote in message
news:%23C166Q6a HHA.4832@TK2MSF TNGP02.phx.gbl. ..

>I can't find any online examples that actually show the syntax required
for passing parameters to ParameterizedTh readStart. Here is my code
that I have tried that doesn't work :
>
System.Threadin g.ThreadStart thdStart = new
System.Threadin g.Parameterized ThreadStart((Mo veMail), new object[] {
progress, oItems, destfolder, objConn });
System.Threadin g.Thread thd1 = new
System.Threadin g.Thread(thdSta rt);
thd1.Start();

The ParameterizedTh readStart constructor only takes the delegate to the
start procedure. The parameter itself is passed on the Start method:

System.Threadin g.Parameterized ThreadStart thdStart = new
System.Threadin g.Parameterized ThreadStart(thi s.MoveMail);
System.Threadin g.Thread thd1 = new System.Threadin g.Thread(thdSta rt);
thd1.Start(new object[] {progress, oItems, destfolder, objConn });

Notice that you can only pass a SINGLE parameter of type object. You can
put anyting inside an object, in this case an array of objects that contains
four elements. Be sure to adjust your MailMove method accordingly (it should
take only one object, not four, and then extract those four objects from
inside the one that you passed).