C#.net 2010 delegate

scampercat

In a C# 2010 application, I need to make a change where some
logic is hard-coded and I want to obtain the values from a sql server 2008 r2 database.
Before I make any changes, I want to make certain I understand how the existing logic work.
In a microsoft training class for C#.net, I learned about delegates
and worked on 'labs' to teach you the concepts.

When you look at the code I listed below:

LabelCustomerName.Text += transaction.CustomerName;
LabelCustome_Status.Text += transaction.Customer_Status;

you can see the customer name and customer_status are placed into
textboxes.

I am guessing that the fields to the right of the += are delegates.
If this is true, can you tell me how to find the original location where the values are obtained from?

If these are not delegates, can you tell me and/or point me to a reference that will help me determine where the orginal values are obtained from?

Should I use system.reflections? If so, can you tell me what code to use so I would know how to use system.reflections?

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Buse Sorin14y ago
Accepted answer
"+=" applied to to strings means append. Ex:
string c="www.c-sharp";

// at this moment c="www.c-sharpcorner.com"

LE: one more thing : c+="corner.com"; is equivalent to c=c+"corner.com".
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Vulpes14y ago
Yes, Buse is right.

What you're thinking about is when the += operator is used with an event, rather than a string. For example:

LabelCustomerName.Click += LabelCustomerName_Click;

This means that a method called LabelCustomerName_Click is added to the invocation list of the Click event of the LabelCustomerName control.

So, when the Click event is fired, this method will be called automatically - as will any others that have been added to the invocation list already.

Similarly, the -= operator removes a method from an event's invocation list.

When using Visual Studio to develop applications, it's not usually necessary to write this sort of code yourself - the designer does it for you. However, if you're adding controls dynamically at runtime, then you do have to 'wire up' event handlers manually.
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