Passing a variable class object through to a class

Question

I'm trying to work out if the following is possible, I've done lots of googling and I'm a bit confused. I'm pretty sure I can work out the class reflection on the object class and updating the database isn't a problem once I have the loop, but I can't work out if this is possible at all.

If I was doing this with a fixed class object it'd be easy I'd just do:

public void updateDB(obj_Users myObject)

But as I have a lot of class objects that will take a long time, so trying to make it more dynamic.

Here is a sample of a class I want to pass through (but could be anything following the same format):

public class obj_Users
{
    public Int32 UserID { get; set; }
    public String UserName { get; set; }
    public String FirstName { get; set; }
    public String Surname { get; set; }
    public String Email { get; set; }
    public Int32 UserRole { get; set; }
    public Int32 UserCompanyID { get; set; }
    public String UserPassword { get; set; }
    public Boolean IsAdmin { get; set; }
    public String SessionKey { get; set; }
}

Here is some pseudocode of what I'm trying to achieve to explain:

public void updateDB(AnyClassObject obj_Users)
{
    // Loop through obj_Users and grab the properties

    // DB update call
}

You can get the properties using obj_Users.GetType().GetProperties(), is there anything in particular you are stuck with? — Coding Flow
– Coding Flow, Commented Dec 2, 2014 at 11:08
Sorry getiting the properties isnt the issue, its the being able to pass the object through to updateDB i can't work out — MissCoder87
– MissCoder87, Commented Dec 2, 2014 at 11:10
Just make the parameter of type object, then you can pass in an instance of any class or struct. — Coding Flow
– Coding Flow, Commented Dec 2, 2014 at 11:11
Sorry, my bad explaining. AnyClassObject doesnt exist, its psudocode for what i'm trying to achieve. I can't work out what that should be — MissCoder87
– MissCoder87, Commented Dec 2, 2014 at 11:11

Marko Juvančič · Accepted Answer · 2014-12-02 11:13:40Z

0

This:

public void updateDB(object paramobj)
{
    foreach(var prop in paramobj.GetType().GetProperties())
    {
           //grab
    }
    // update
 }

answered Dec 2, 2014 at 11:13

Marko Juvančič

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3 Comments

MissCoder87 Over a year ago

What i'm trying to achieve though is to not have to list each object in the if - i have like 100 objects so that's the bit i'm trying to make dynamic

MissCoder87 Over a year ago

That makes sense. How do I call that though? When i do DBCommon dbc = new DBCommon(); dbc.updateDB(obj_Users); it tells me that obj_Users is a type but used like a variable

Marko Juvančič Over a year ago

Of course it tells you that. obj_Users is a class, you need to create an instance of it and pass it to your method.

Sybren · Accepted Answer · 2014-12-02 11:11:33Z

0

Try this to loop to get the properties

foreach(var prop in obj_Users.GetType().GetProperties()) {
    //use your props
}

answered Dec 2, 2014 at 11:11

Sybren

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Comments

Coding Flow · Accepted Answer · 2014-12-02 11:17:43Z

0

You just need your parameter to be of type object to pass an instance of any class or struct.

public void updateDB(object whatever)
{
    foreach(var prop in whatever.GetType().GetProperties())
    {
       ... //do stuff
    }
}

answered Dec 2, 2014 at 11:17

Coding Flow

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Comments

mainvoid · Accepted Answer · 2014-12-02 11:18:17Z

0

If you're stuck with the problem of having to deal with different classes, a generic method should fit your needs:

public void UpdateDB<T>(T obj)
{
    var properties = typeof(T).GetProperties();

    foreach (var prop in properties)
    {
        // Here you loop through the properties.
    }
}

answered Dec 2, 2014 at 11:18

mainvoid

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