Switch case statement error: A constant value is expected

[mnarewec]

Hi all
I have a TreeView in a MDI Apps. When the Nodes is selected it displays a MDI child form.

I want to use a switch statement to determine which node is selected and to load or show the correct MDI child form.

Here is part of the code:

private void treeViewMDI_AfterSelected (object sender, TreeViewEvenArgs e)
{
frmAB frmAB1 = new frmAB ();
frmUDC frmUDC1 = new frmUDC();

switch(e.Node.Text)
{
case frmAB1.Text: // This did not compile
frmAB1.MDIParent=this;
frmAB1.show();
break;

case frmUDC1.Text: //This did not compile
frmUDC1.MDIParent=this;
frmUDC1.show();
break;
}
}


The line of code that did not compile is stated above.

Please assist or point me to right direction to solve this problem.

Marsh

[r035198x]

Hi all
I have a TreeView in a MDI Apps. When the Nodes is selected it displays a MDI child form.

I want to use a switch statement to determine which node is selected and to load or show the correct MDI child form.

Here is part of the code:

private void treeViewMDI_AfterSelected (object sender, TreeViewEvenArgs e)
{
frmAB frmAB1 = new frmAB ();
frmUDC frmUDC1 = new frmUDC();

switch(e.Node.Text)
{
case frmAB1.Text: // This did not compile
frmAB1.MDIParent=this;
frmAB1.show();
break;

case frmUDC1.Text: //This did not compile
frmUDC1.MDIParent=this;
frmUDC1.show();
break;
}
}


The line of code that did not compile is stated above.

Please assist or point me to right direction to solve this problem.

Marsh

Like the error message says, you have to use a constant value for your cases. This is to ensure that the compiler can enforce the rule which says that "no two case constants within the same switch". If you use variables then the there is a possibility of breaking the rule.

[balabaster]

Like the error message says, you have to use a constant value for your cases. This is to ensure that the compiler can enforce the rule which says that "no two case constants within the same switch". If you use variables then the there is a possibility of breaking the rule.

Hmm...doesn't look like you have this ability in C#. However, in VB we can do:

Select Case SomeObjectParameter 
  Case Is = SomeSecondObject.Parameter
    'Do Stuff
  Case Is = SomeThirdObject.Parameter
    'Do Stuff
  Case Else
    'Do something else
End Select

[r035198x]

Hmm...doesn't look like you have this ability in C#. However, in VB we can do:

Select Case SomeObjectParameter 
  Case Is = SomeSecondObject.Parameter
    'Do Stuff
  Case Is = SomeThirdObject.Parameter
    'Do Stuff
  Case Else
    'Do something else
End Select

VB's case is closer to C#'s if else than to the switch.

[Plater]

Oh VB nad your butchering of standard coding concepts.
That is not a switch/case statement