newbee confused with [] and ()

[Raymond Du]

Hi,

I am confused about when to use bracket and parenthesis, say the following
code snippet:

for (int i=0; i< Request.Form.Count; i++)
Label1.Text = Label1.Text + Request.Form.GetKey(i) + " ";

will give me all names of elements in a form, however to get element's
values I have to do:

for (int i=0; i< Request.Form.Count; i++)
Label1.Text = Label1.Text + Request.Form[i] + " ";

Both Request.Form.GetKey and Request.Form returns a String from a
collection, why the difference in syntax?

TIA

[Jon Skeet [C# MVP]]

Raymond Du <rd**@yahoo.com> wrote:

I am confused about when to use bracket and parenthesis, say the following
code snippet:

for (int i=0; i< Request.Form.Count; i++)
Label1.Text = Label1.Text + Request.Form.GetKey(i) + " ";

will give me all names of elements in a form, however to get element's
values I have to do:

for (int i=0; i< Request.Form.Count; i++)
Label1.Text = Label1.Text + Request.Form[i] + " ";

Both Request.Form.GetKey and Request.Form returns a String from a
collection, why the difference in syntax?

[] is for indexing - either array indexing or an indexer such as
ArrayList provides.

() is for method calls.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
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