accessing method of mdi runtime

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C#

how to access methods of mdi forms while convert string to form object in c# window application

Posted 29-May-13 21:09pm

Romal from Surat Gujarat, India

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renish patel 30-May-13 7:24am

Hi romal,

May be you are trying to call method from another form,am i right?

Sunasara Imdadhusen 30-May-13 7:32am

Please provide more details about your question so other can give correct answers!

Romal from Surat Gujarat, India 30-May-13 7:35am

yes..

renish patel 30-May-13 7:41am

ok i explain some basic details regarding to your question..follow it carefully,may be you get your solution,if problem occurs then share it.

Thanks

Happy coding...

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renish patel · Answer 1 · 2013-05-30T01:38:00

Here, i give you explanation with taking timer as example.

An MDI child for has a reference to its parent in its MdiParent property. This property is of type Form, so you must cast it to its mpst specific type to get access to members of that type. If your parent form is of type Form1 and it has a Timer named Timer1, you would start that Timer from an MDI child form like this:
C# Code:

((Form1)this.MdiParent).Timer1.Start()

If you have Option Strict turned Off, you can do it without the cast, but that will be using late-binding so Intellisense will not show you the Timer1 property. With Option Strict turned On, as it should always be without good reason not to, the code will not compile without the cast.

If your child form is not an MDI child then you need to give it a reference to the parent form yourself.

Also, I always recommend that all controls be declared Private (the default is Friend) and that you provide access if necessary via public properties and methods of the form. For instance, in this case you would make the Timer private and then provide public methods to start and stop it. That way. your MDI children have enough access to do what they need to but nothing more.

Misha india · Answer 2 · 2013-06-10T19:15:00

Solution 2

Type t = Type.GetType("namespace" + "MdiFormName");

MethodInfo method = t.GetMethod("CalluserRights");

Form c = Activator.CreateInstance(t) as Form;

//will call CalluserRights method of MDI and return datatable
object datatable = method.Invoke(c, null);

Posted 10-Jun-13 19:15pm

Misha india