vb.net - How to limit the scope of a variable to the function when declared in an If statement -


i need limit scope of variable function resides need declare within if statement it's type change depending. i'm working within vb.net

public function coursedatatable()     if radiocourses.checked         dim searchby new classsearchcourses     elseif radioattendees.checked         dim searchby new classsearchattendees     end if

the obvious problem variable doesn't persist outside of if statement. want limit scope of variable because a, it's used else , b, memory leakage, class end holding whole sql tables , don't want persisting when it's not needed. can't use inheritance or polymorph here because i'm working legacy system.

this rework (i'm struggling think of different way of approaching evidently) can't find in msdn allows procedure scope ignores other blocks @ declaration.

it still possible use polymorphism in legacy system. can find common functionality must exist between 2 in order want reuse same variable. can create wrapper classes each of these legacy classes. wrapper class implement common interface , call underlying legacy implementation. declare variable common interface , create appropriate wrapper class instance inside of if statements.

edit: if have ability modify legacy classes @ all, simpler solution create common interface both of legacy classes can implement. give polymorphic functionality desire without need of wrapper classes. vb.net provides ability implement interface in way interface methods exposed interface reference. this, mark interface implementation methods private.


Comments

Post a Comment

Popular posts from this blog

c++ - Difference between pre and post decrement in recursive function argument -

i have following sample code used pre-decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(--c); cout << c << endl; return; } } this function give output input 4 : dp3 dp2 dp1 dp0 0 1 2 3 but when use post decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(c--); cout << c << endl; return; } } output goes in infinite loop dp4 can explain me in detail why happens ? this happens because function(c--) called same value of c , when finishes c decremented. recursively called, hence called same value no chance of return , hit stack overflow error. assume this, int x = 1, y = 0; y = x++ result y == 1 , x == 2. if y = ++x , bot x , y 2.
Read more

c# - Retrieve google contact -

i'm using .net retrieve contact info google contact. however, retrieves including sent email not stored in contact. there anyway can retrieve contact contact? here code requestsettings rs = new requestsettings("", email, password); rs.autopaging = true; contactsrequest cr = new contactsrequest(rs); feed<contact> contacts = cr.getcontacts(); foreach (contact contact in contacts.entries) { name name = contact.name; response.write(name.givenname + " " + name.familyname + "<br/>"); foreach (email emailid in contact.emails) { response.write(emailid.address + "<br/>"); } response.write("<br/>"); } im using google.gdata.contacts package nuget v 2.2.0 string redirecturi = "urn:ietf:wg:oauth:2.0:oob"; // build base oauth2 parameters var oauth2
Read more

javascript - How to insert selected radio button value into table cell -

i have 5 radio buttons <input type="radio" id="rating">1 <input type="radio" id="rating2">2 <input type="radio" id="rating3">3 <input type="radio" id="rating4">4 <input type="radio" id="rating5">5 i have 1 table <table id="mytabledata" border="1" style="width:100%"> <tr id="templaterow"> <th>ratings</th> </tr> </table> one add button <input type="button" id="add" value="add" onclick="addradiovalue()"> i've written code dynamically add rows table, when select radio button , click on add button, value of selected radio button should inserted new cell within table ratings. i able thing text box, i'm not able radio button. can me? your problems didn't have name set on radios , tryi
Read more