How do I find out the type of a derived class's base class
now I do this but I dislike it
try{
myBase control = (myBase)derivedControl;
doStuff(control);
}
catch{}
I would like to do something like this
if(derivedControl.baseType() == typeof(myBase)
{
doStuff(derivedControl);
}
void doStuff(myBase control)
{
}
Find the Type of a base class
Hammo
What you are looking for is the "is" and "as" syntax:
you can do either:
myBase control = derivedControl as myBase;
if (myBase != null)
{
// derivedControl could be casted to myBase, do something with it
}
or you can use:
if (derivedControl is myBase)
{
doStuff(derivedControl as myBase);
// or cast it before the call, you choice...
}
-----
if you really need to know the class type and what it is derived from, not only for casting purposes, you can use something like this to get the inhertance path:
Type type = derivedControl.GetType();
Console.WriteLine(type.FullName);
while ((type = type.BaseType) != null) Console.WriteLine(type.FullName);
milocat
Figo
Thank you this is exaclty what I was looking for. I just never thought about is and as.
Brian
DaveSLC
Hi, Brian
We can use is keywords.
Say Fox Class is derived from Mammal Class, then the instance of Fox is compatible to Mammal.
For example:
Class Fox: Mammal
{...}
Fox fox = new Fox();
Mammal mammal = new Mammal();
if(fox is Mammal)
else
Otherwise, to judge whether the class is directly derived from another you can:
if (fox.GetType().BaseType == mammal.GetType())
MessageBox.Show("fox is mammal's direct descendant ");
else
MessageBox.Show("fox is not mammal's direct descendant");
see: http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=1255632&SiteID=1
If you have further problem pls feel free to let me know.
Thanks
Henning_ohm
John,
Thank you I never thought about the is and as syntax. This is exactly what I needed to do.
Brian