Re: dynamic function call - C# Discussion Boards

17-Mar-06 5:50

i want to call a function dynamically which will differ according to my need. thing i need something like this:

<br />
private void FUNCTION_NAME(string ANY_STRING)<br />
{<br />
   string ANOTHER_STRING="func"+ANY_STRING;<br />
   ANOTHER_STRING.ANY_STRING();<br />
}<br />

i'll get ANY_STRING from some other source and that's the name which will refer the class name and part of function name too.
any help will be great Smile | :)

-- modified at 11:50 Friday 17th March, 2006

Guffa17-Mar-06 6:09

17-Mar-06 6:09

It's possible to do that using reflection, but I doubt that you really need that.

Why don't you explain what you are trying to accomplish, instead of asking how to do it the way that you think it's done?

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vatzcar17-Mar-06 16:46

17-Mar-06 16:46

Guffa wrote:
It's possible to do that using reflection, but I doubt that you really need that.

Why don't you explain what you are trying to accomplish, instead of asking how to do it the way that you think it's done?

well.. i'm trying to do is, i have one xml file which maintains which modules user has choosen to use. then my app. will load those module detail in menu(this far i've completed). when user clicks one menu that particular module's entry function will be called. now menu click event passing me the 'SENDER', from which i can extract the menu name which i've to use as identifier(nothing else i've got better than this after having many suggestion from people). after clicking the menu i'll run the entry function of that particular module. the important thing is, one user may have choosen completely different modules than other.

Guffa19-Mar-06 9:49

19-Mar-06 9:49

Make a base class or an interface for the modules, so that you can call the method without caring which of the modules it is. To get the right module you can do a lookup-table, like putting references to the modules in a hash-table.

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vatzcar20-Mar-06 5:07

20-Mar-06 5:07

thanks for your reply Smile | :)

i've fixed the problem with the help of reflection Smile | :)

engsrini17-Mar-06 7:20

17-Mar-06 7:20

Yes it is possible but i thing U need to create atleast atleast one Object for the class name that ur specifying in the string and u can use
Type t=typeof(ClassName)
t.InvokeMember("FunctionName", BindingFlags, null, obj, new FunctionArgsobj[]);

Hope it will help
Regards,
Thanks and Regards,
Srini

vatzcar17-Mar-06 19:47

Cut/Copy/Paste for TreeView

17-Mar-06 19:47

i did, and finally nothing happens, not even any exception.

zaboboa17-Mar-06 5:08

zaboboa

17-Mar-06 5:08

Hello,

How can I wire the default clipboard events (Cut/Copy/Paste) to my menu items. The thing is, when you enter the edit mode for a treenode, and right click that node, the default context menu pops up, with the cut, copy, and paste events. However, I have same events in the main menu, so I want them to perform the same tasks on the treenode objects.

Thank you.

Re: Cut/Copy/Paste for TreeView

Ed.Poore17-Mar-06 12:52

Ed.Poore

17-Mar-06 12:52

zaboboa wrote:
How can I wire the default clipboard events (Cut/Copy/Paste) to my menu items.

You need to add code in your menu handler which uses the Clipboard object, e.g.

private void mnuEditCopy_Click(object sender, EventArgs e)
{
    Clipboard.SetText(this.treeView.SelectedNode.Text);
}

What you get and put from the clipboard is up to you. What the right-click options are doing at the moment for the TreeView is cutting, copying and pasting the text for the TreeNode, not the actual TreeNode itself.

If you actually want to copy a TreeNode then you may be able to use the

Clipboard.SetDataObject

method (or something namely similarly to it).

Ed

How to get the Enum item names using Reflection

engsrini17-Mar-06 3:07

Re: How to get the Enum item names using Reflection

17-Mar-06 3:07

Hi

I am struggling over getting the enum items name using reflection
say this the enum

/ Enum for Art Mode		<br />
public   enum  tenumArtMode<br />
{<br />
    artModeAuto=0,<br />
    artModeManual,<br />
    artModeInvalid<br />
} ;

Note:: this enum is in dll which is developed in VC++ .NET, I have added reference to access this enum in C#

I want to display this enum items using C#

I have tried the function Enum.GetName

tenumArtMode tenumMode;<br />
Type t=tenumMode.GetType();<br />
<br />
Enum.GetName(t.FieldType,t.GetValue(tenumMode));

But this throws me an ArgumentException

TIA
Srini

mcljava17-Mar-06 4:22

mcljava

17-Mar-06 4:22

You can also simply do a ToString(). For example:

string s = tenumArtMode.arModeManual.ToString();

Would yield the string "artModeManual"

Good Luck

Mike Luster
CTI/IVR/Telephony SME

Re: How to get the Enum item names using Reflection

engsrini17-Mar-06 5:53

Re: How to get the Enum item names using Reflection

17-Mar-06 5:53

Thanks For your reply Mike,

No, This can't be applicable, b'cas i getting this enum at runtime so i would not know the enum item names.

Do understand my question. I want to iterate the enum using reflections

Regards,
Srini

Guffa17-Mar-06 6:16

Re: How to get the Enum item names using Reflection

17-Mar-06 6:16

You don't need reflection. The Enum class provides you with methods to get all information you nead about the enum.

Use the GetNames method to get an array of all the names. If you need their values, use the GetValues method to get an array with all the values.

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engsrini17-Mar-06 7:08

Re: How to get the Enum item names using Reflection

17-Mar-06 7:08

If it is One Enum then your suggestions is OK. I can use Enum.GetNames(enum), But My situation is likes a structure which will contain lot of enums(say 100) as it member) so i can't write 100's lines of code to display every member

ie.

enum1<br />
{<br />
a=0,<br />
b,<br />
c<br />
}<br />
..<br />
enum100<br />
{<br />
x=0,<br />
y,<br />
z<br />
}<br />
<br />
Struct st<br />
{<br />
enum1 e1;<br />
enum2 e2;<br />
..<br />
enum100 e100;<br />
};<br />
<br />
Enum.GetNames(st.e1);<br />
..<br />
Enum.GetNames(st.e100);

Instead Puting like the above

I am thinking of reflection to reduce the line of code
Like this

Type ty = st.GetType();<br />
 FieldInfo[] fin= ty.GetFields();<br />
 foreach (FieldInfo fino in fin)<br />
  {<br />
   fino.GetValue(st).ToString();<br />
  }

But This print the enum1..enum100 values like 0 0 0 0 ..
but I want to print the enum member names like a b c ...

Hope I Explained my question Clearyly
Regards,
Srini

Guffa17-Mar-06 7:32

Re: How to get the Enum item names using Reflection

17-Mar-06 7:32

I see. Try this, then:

Enum.GetName(fino.FieldType, fino.GetValue(st))

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engsrini17-Mar-06 8:32

Re: How to get the Enum item names using Reflection

17-Mar-06 8:32

Exactly thats what i want, i have used the same code but it throws me me ArgumentException, i think since the enum is developed in VC++ .net fino.FieldType doesn't match with System.Enum Type in C#(since we are using Enum.GetName).. I think so.
Try it out and if anything works please share with me.
Regards,
Srini

Guffa17-Mar-06 8:34

Re: How to get the Enum item names using Reflection

17-Mar-06 8:34

Have you tried it out? It's not the same code as you showed in your first post.

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engsrini17-Mar-06 8:41

Re: How to get the Enum item names using Reflection

17-Mar-06 8:41

Yes I tried out. it throws me the ArgumentException.
ArgumentException - Description given in the MSDN help
enumType is not an Enum.
-or-

value is neither of type enumType nor does it have the same underlying type as enumType.

Enum in VC++ .net and VC# .net are they different?

engsrini17-Mar-06 8:44

Re: How to get the Enum item names using Reflection

17-Mar-06 8:44

Even That is code i have mentioned in my initial Conversation.

Guffa17-Mar-06 8:54

Re: How to get the Enum item names using Reflection

17-Mar-06 8:54

No, it's not. There you used a Type object instead of a FieldInfo object.

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chriswa17-Mar-06 13:26

chriswa

17-Mar-06 13:26

Have you tried using the Enum struct? Once you have the type of enum you can use the static methods of the Enum struct to obtain information about the enum type. Suspicious | :suss:

chriswa

Re: How to get the Enum item names using Reflection

engsrini20-Mar-06 1:42