Have some problem with enum and string

[tony]

Hello!

I have below a for loop and a switch in the for loop.
I have also a enum called colBlowStep with some values.
I have also an array[] called m_columnBlowStep with some strings.
All items in the array[] m_columnBlowStep is string because I have used
ToString on each enum item as you can see.

I want to use enum in the case statment in the switch.
I know I can use string but I rather want to use enum.

The problem is that I can't match string that exist in m_columnBlowStep
[column]
with enum that I have in the case statements.
I can't write in this way
switch( (colBlowStep)Convert.ToInt32( m_columnBlowStep [column] ) )
because I can't convert a string to an int.

So what I want is to loop through the for loop check the switch and then go
to the corresponing
case where I have enum values.

So is it possible to use string as I have with enum in the case.

private enum colBlowStep : byte
{
No, BlowSteps, EndCond, Value, Ref, N_switch
}

private string[] m_columnBlowStep = { colBlowStep.No.ToString(),
colBlowStep.BlowSteps.ToString(), colBlowStep.EndCond.ToString(),

colBlowStep.Value.ToString(), colBlowStep.Ref.ToString(),
colBlowStep.N_switch.ToString() };



for (int column = 0; column < m_flgBlowStep.Columns.Items.Count; column++)
{
switch( (colBlowStep)Convert.ToInt32( m_columnBlowStep [column] ) )
{
case colBlowStep.No :
...
break;
case colBlowStep.BlowSteps :
...
break;
case colBlowStep.EndCond :
...
break;
case colBlowStep.Value :
...
break;
case colBlowStep.Ref :
...
break;
case colBlowStep.N_switch :
...
break;
}
}


//Tony

 

[Sean Chambers]

Instead of trying to Convert.ToInt32, you have to parse the string and
tell C# that you know the string is an int value like so:

(colBlowStep)Int32.Parse(m_columnBlowStep [column])

That should work.
hope that helps!

Sean

 

[tony]

Hello!

This doesn't work because
m_columnBlowStep [column])
in not an int it's a string.

Any better idea?

//Tony

Instead of trying to Convert.ToInt32, you have to parse the string and
tell C# that you know the string is an int value like so:

(colBlowStep)Int32.Parse(m_columnBlowStep [column])

That should work.
hope that helps!

Sean

Hello!

I have below a for loop and a switch in the for loop.
I have also a enum called colBlowStep with some values.
I have also an array[] called m_columnBlowStep with some strings.
All items in the array[] m_columnBlowStep is string because I have used
ToString on each enum item as you can see.

I want to use enum in the case statment in the switch.
I know I can use string but I rather want to use enum.

The problem is that I can't match string that exist in m_columnBlowStep
[column]
with enum that I have in the case statements.
I can't write in this way
switch( (colBlowStep)Convert.ToInt32( m_columnBlowStep [column] ) )
because I can't convert a string to an int.

So what I want is to loop through the for loop check the switch and then go
to the corresponing
case where I have enum values.

So is it possible to use string as I have with enum in the case.

private enum colBlowStep : byte
{
No, BlowSteps, EndCond, Value, Ref, N_switch
}

private string[] m_columnBlowStep = { colBlowStep.No.ToString(),
colBlowStep.BlowSteps.ToString(), colBlowStep.EndCond.ToString(),

colBlowStep.Value.ToString(), colBlowStep.Ref.ToString(),
colBlowStep.N_switch.ToString() };



for (int column = 0; column < m_flgBlowStep.Columns.Items.Count; column++)
{
switch( (colBlowStep)Convert.ToInt32( m_columnBlowStep [column] ) )
{
case colBlowStep.No :
...
break;
case colBlowStep.BlowSteps :
...
break;
case colBlowStep.EndCond :
...
break;
case colBlowStep.Value :
...
break;
case colBlowStep.Ref :
...
break;
case colBlowStep.N_switch :
...
break;
}
}


//Tony

 

[Guest]

Perhaps using Enum.GetValues and Enum.GetNames can be used to convert between
the the string representation of the enum verses the byte values? Not sure
this is what you need but thought I'd give this as an avenue to persue. Hope
this helps.
--
Thom

Hello!

This doesn't work because
m_columnBlowStep [column])
in not an int it's a string.

Any better idea?

//Tony

Instead of trying to Convert.ToInt32, you have to parse the string and
tell C# that you know the string is an int value like so:

(colBlowStep)Int32.Parse(m_columnBlowStep [column])

That should work.
hope that helps!

Sean

Hello!

I have below a for loop and a switch in the for loop.
I have also a enum called colBlowStep with some values.
I have also an array[] called m_columnBlowStep with some strings.
All items in the array[] m_columnBlowStep is string because I have used
ToString on each enum item as you can see.

I want to use enum in the case statment in the switch.
I know I can use string but I rather want to use enum.

The problem is that I can't match string that exist in m_columnBlowStep
[column]
with enum that I have in the case statements.
I can't write in this way
switch( (colBlowStep)Convert.ToInt32( m_columnBlowStep [column] ) )
because I can't convert a string to an int.

So what I want is to loop through the for loop check the switch and then go
to the corresponing
case where I have enum values.

So is it possible to use string as I have with enum in the case.

private enum colBlowStep : byte
{
No, BlowSteps, EndCond, Value, Ref, N_switch
}

private string[] m_columnBlowStep = { colBlowStep.No.ToString(),
colBlowStep.BlowSteps.ToString(), colBlowStep.EndCond.ToString(),

colBlowStep.Value.ToString(), colBlowStep.Ref.ToString(),
colBlowStep.N_switch.ToString() };



for (int column = 0; column < m_flgBlowStep.Columns.Items.Count; column++)
{
switch( (colBlowStep)Convert.ToInt32( m_columnBlowStep [column] ) )
{
case colBlowStep.No :
...
break;
case colBlowStep.BlowSteps :
...
break;
case colBlowStep.EndCond :
...
break;
case colBlowStep.Value :
...
break;
case colBlowStep.Ref :
...
break;
case colBlowStep.N_switch :
...
break;
}
}


//Tony

 

[Jon Skeet [C# MVP]]

This doesn't work because
m_columnBlowStep [column])
in not an int it's a string.

That's the whole point of Int32.Parse - it converts a string into an
int.

Jon

 

[Guest]

try this:

string[] m_columnBlowStep = Enum.GetNames(typeof(colBlowStep));

for (int column = 0; column < m_flgBlowStep.Columns.Items.Count; column++)
{
switch (Enum.Parse(typeof(colBlowStep), m_columnBlowStep[column]))
{
case colBlowStep.No:
break;
case colBlowStep.BlowSteps:
break;
case colBlowStep.EndCond:
break;
case colBlowStep.Value:
break;
case colBlowStep.Ref:
break;
case colBlowStep.N_switch:
break;
}
}


HTH

Ciaran O'Donnell

 

[tony]

Hello!

I have letters in this field *m_columnBlowStep [column])*
such as "No" that is not convertable to int .
So is it possible to convert from string to enum?

//Tony

This doesn't work because
m_columnBlowStep [column])
in not an int it's a string.

That's the whole point of Int32.Parse - it converts a string into an
int.

Jon

 

[Christof Nordiek]

Hi tony,

why you are using stringrepresentation?
you could directly put enums in the array.

isntead of

private string[] m_columnBlowStep = { colBlowStep.No.ToString(),
colBlowStep.BlowSteps.ToString(), colBlowStep.EndCond.ToString(),
colBlowStep.Value.ToString(), colBlowStep.Ref.ToString(),
colBlowStep.N_switch.ToString() };

use

private colBlowStep[] m_columnBloyStep = {colBlowStep.No,
colBlowStep.BlowSteps., colBlowStep.EndCond.,
colBlowStep.Value, colBlowStep.Ref,
colBlowStep.N_switch };

and them simply use:

switch (m_columnBlowStep[column])
{
...
}

HTH

 

[Jon Skeet [C# MVP]]

I have letters in this field *m_columnBlowStep [column])*
such as "No" that is not convertable to int .

Ah - right, that makes more sense.

So is it possible to convert from string to enum?

Absolutely: use Enum.Parse.