|
web
newsgroups
|
|||||||||||||||||||||||
|
|||||||||||||||||||||||
variable declaration ?hi,
what does the following statement mean and what does it do? Dim obTest As Record.Class1 = CType(Class2.GetSessionInfo(class3.TestConstant), Record.Class1) GetSessionInfo() simply does this Return Me.Session(name) TestConstant is a contstant containing "test.tester" What does me.session(name) do? Also, since class1 has many methods, about 10 properties, and 2 collections does this assign structure of properties to obTest? Thanks a lot. Hi,
Thank you for posting. It's hard for me to explain the statement at this point. Would you please show me the whole related code including the definition of Class1, Class2 and Class3? I look forward to your reply. Sincerely, Linda Liu Microsoft Online Community Support ==================================================== When responding to posts,please "Reply to Group" via your newsreader so that others may learn and benefit from your issue. ==================================================== Hello RJ,
Simple... Let's break it down. Dim obTest As Record.Class1 ' This creates a variable named obTest with a data type of Record.Class1 the = sign in a Dim statement means that the right side of the expression will be used to initialize the variable CType converts parameter1 into a variable of datatype parameter2... So: Class2.GetSessionInfo(class3.TestConstant) gets converted into a Record.Class1.. which then gets assigned to obTest. Simple eh. -Boo Show quoteHide quote > hi, > > what does the following statement mean and what does it do? > > Dim obTest As Record.Class1 = > CType(Class2.GetSessionInfo(class3.TestConstant), Record.Class1) > > GetSessionInfo() simply does this Return Me.Session(name) > > TestConstant is a contstant containing "test.tester" > > What does me.session(name) do? > > Also, since class1 has many methods, about 10 properties, and 2 > collections does this assign structure of properties to obTest? > > Thanks a lot. > RJ,
See inline > This means that you create an Object obTest, that holds the reference to the > Dim obTest As Record.Class1 = > CType(Class2.GetSessionInfo(class3.TestConstant), Record.Class1) object Class2.GetSessionInfo(class3.TestConstant). You can use that obTest object now direct without everytime to use that long description. (The word DirectCast instead of CType (convert type) would here probably be better) > I don't see this on MSDN, which means that it is a method in your program > GetSessionInfo() simply does this Return Me.Session(name) > (class) > TestConstant is a contstant containing "test.tester" A session is a temporaly storage used to holds data between send and > > What does me.session(name) do? > postback from webpages. > Also, since class1 has many methods, about 10 properties, and 2 The difference between a Class and a structure is the place where it is in > collections does this assign structure of properties to obTest? > memory. A structure is always direct in your mainprogram on the main heap an therefore inefficient. A class is on the managed heap, and can be destroyed (is automaticly done by the managed code) when not needed anymore/ Therefore if something is in a class, than it is in the class and not in a structure. (Although a class can reference to a structure). I hope this helps, Cor typing error,
Main heap has to be Main stack, my thought was already something further in the message. Cor Show quoteHide quote "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> schreef in bericht news:%23lcr2WolGHA.4164@TK2MSFTNGP03.phx.gbl... > RJ, > > See inline >> >> Dim obTest As Record.Class1 = >> CType(Class2.GetSessionInfo(class3.TestConstant), Record.Class1) > > This means that you create an Object obTest, that holds the reference to > the object Class2.GetSessionInfo(class3.TestConstant). > > You can use that obTest object now direct without everytime to use that > long description. > (The word DirectCast instead of CType (convert type) would here probably > be better) > >> >> GetSessionInfo() simply does this Return Me.Session(name) >> > I don't see this on MSDN, which means that it is a method in your program > (class) > >> TestConstant is a contstant containing "test.tester" >> >> What does me.session(name) do? >> > > A session is a temporaly storage used to holds data between send and > postback from webpages. > >> Also, since class1 has many methods, about 10 properties, and 2 >> collections does this assign structure of properties to obTest? >> > The difference between a Class and a structure is the place where it is in > memory. A structure is always direct in your mainprogram on the main heap > an therefore inefficient. A class is on the managed heap, and can be > destroyed (is automaticly done by the managed code) when not needed > anymore/ > > Therefore if something is in a class, than it is in the class and not in a > structure. (Although a class can reference to a structure). > > I hope this helps, > > Cor > > First of all...thank you all for your responses. It is greatly appreciated.
>> GetSessionInfo() simply does this Return Me.Session(name) It is a method in my code that contains only>> >>I don't see this on MSDN, which means that it is a method in your program >>(class) Return Me.Session(name) The value of class3.TestConstant is "test.tester" at run time according to debug. I see where the constant is assigned in class3. So at run time Class2.GetSessionInfo(class3.TestConstant) is equal to "test.tester" so statement would then be CType("test.tester", Record.Class1). How is "test.test" being returned as Record.Class1? I just don't get what CType(Class2.GetSessionInfo(class3.TestConstant), Record.Class1) is doing and why you would want to do this? :( Why not just stop at Dim obTest As Record.Class1 Why is the initial value being set to CType(Class2.GetSessionInfo(class3.TestConstant), Record.Class1) Finally, why don't we have to have New keyword behind as in variable declaration? I have searched entire project and don't find a Dim obTest as New Record.Class1. Thanks again for your patience and assistance. Show quoteHide quote "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message news:%23lcr2WolGHA.4164@TK2MSFTNGP03.phx.gbl... > RJ, > > See inline >> >> Dim obTest As Record.Class1 = >> CType(Class2.GetSessionInfo(class3.TestConstant), Record.Class1) > > This means that you create an Object obTest, that holds the reference to > the object Class2.GetSessionInfo(class3.TestConstant). > > You can use that obTest object now direct without everytime to use that > long description. > (The word DirectCast instead of CType (convert type) would here probably > be better) > >> >> GetSessionInfo() simply does this Return Me.Session(name) >> > I don't see this on MSDN, which means that it is a method in your program > (class) > >> TestConstant is a contstant containing "test.tester" >> >> What does me.session(name) do? >> > > A session is a temporaly storage used to holds data between send and > postback from webpages. > >> Also, since class1 has many methods, about 10 properties, and 2 >> collections does this assign structure of properties to obTest? >> > The difference between a Class and a structure is the place where it is in > memory. A structure is always direct in your mainprogram on the main heap > an therefore inefficient. A class is on the managed heap, and can be > destroyed (is automaticly done by the managed code) when not needed > anymore/ > > Therefore if something is in a class, than it is in the class and not in a > structure. (Although a class can reference to a structure). > > I hope this helps, > > Cor > > Hi Rj,
Thank you for your update. It seems that the expression "Class2.GetSessionInfo(class3.TestContant)" returns a object of type Record.Class1. You can assign this returned object to the variable obTest and needn't use New keyword. Although the value of class3.TestConstant is "test.tester" at run time, Class2.GetSessionInfo(class3.TestConstant) should not be equal to "test.tester". It should be equal to the value of the expression of "Me.Session(name)". I think the core of the problem is the expression "Me.Session(name)", which is not clear to us until now. In order to explain this expression, would you please show us the entire related code? I look forward to your reply. Sincerely, Linda Liu Microsoft Online Community Support ==================================================== When responding to posts,please "Reply to Group" via your newsreader so that others may learn and benefit from your issue. ==================================================== 
Other interesting topics
Unicode API
How to assign a state to checkbox in Visual Basic.net ? Programatically create a Stored Procedure simple graphics question Paramters passing and RunWorkerCompleted event Accessing Login info Line 1: Incorrect syntax near '1'. Reference to a control, by its name in a String App.config and changing connection strings disassembly tab? |
|||||||||||||||||||||||
