How to get base class Name ?

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Hi code project...
i want to get the type of class
example: i have class name A
ClassA : System.Windows.Forms.Form

and then i have classB which ClassB : ClassA -- Inherits
and then i have class C which ClassC : ClassB
and class D which ClassD : ClassB too.

i use this class C for show data
frmViewData : ClassC

when i show this frmViewData on mdiForm.. i want to check if frmViewData is ClassC.

example.

C#

void toolStripView_click (object sender, EventArgs e)
{
  frmViewData f = new frmViewData;
  f.MdiParent = this;

  //i try this but not work
  if ( f.GetType() == typeof(classC)
  {
    f.SomeCustomProperties = //Some custom value;
  }
  f.Show();
}

this code is not work. when i check using messagebox

C#

void toolStripView_click (object sender, EventArgs e)
{
  frmViewData f = new frmViewData;
  f.MdiParent = this;
  MessageBox.Show(f.GetType().ToString());

}

the result is " WinnSystem.frmViewData " at messagebox.
is that any other way to check the class ??

thx a lot.

Posted 3-Apr-15 6:45am

SunLucDong

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4 solutions

Solution 4

all solution is good..thx by the way

Posted 5-Apr-15 0:48am

SunLucDong

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Sascha Lefèvre · Accepted Answer · 2015-04-03T06:55:00

something.GetType() == typeof(someOther) checks whether the type of something is equal to the type of someOther. If you want to check whether something inherits from someOther then use the keyword is:

C#

if (f is classC)
{
  // ...
}

Edit: In case the types are equal, is will also return true (so not only for actually derived types).

Edit 2: As PIEBALDConsult has pointed out in his solution, there are alternatives: Type.IsAssignableFrom(..) and Type.IsInstanceOfType(..) that do (mostly) the same thing as the keyword is. Which one is most convenient to use depends on what you have to compare to what (an instance of an object / a type object / a static type). See here:
http://stackoverflow.com/questions/15853159/isassignablefrom-isinstanceoftype-and-the-is-keyword-what-is-the-difference[^]

PIEBALDconsult · Accepted Answer · 2015-04-03T07:34:00

Solution 3

I use Type.IsAssignableFrom : https://msdn.microsoft.com/en-us/library/system.type.isassignablefrom(v=vs.110).aspx[^]

typeof(classC).IsAssignableFrom(f.GetType())

Posted 3-Apr-15 7:34am

PIEBALDconsult

Comments

Sascha Lefèvre 3-Apr-15 13:54pm

My 5

Abhinav S · Accepted Answer · 2015-04-03T06:56:00

Solution 2

Use reflection - Type superClass = frmViewData.GetType().BaseType;

Posted 3-Apr-15 6:56am

Abhinav S