Please explain me this code.

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Hi Fniendss.

Please explain me this code.

what do you mean by String.Empty;
and also this complete line

C#

private static readonly string _connString = String.Empty;


private static readonly string _connString = String.Empty;
   SqlConnection con = new SqlConnection(_connString);

Thanks, By the way am using this code for registration page. Please explain me.

Posted 17-Dec-12 22:57pm

Software Engineer 892

Updated 17-Dec-12 23:11pm

Thomas Daniels

v2

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Comments

MDubey1987 18-Dec-12 5:01am

String.Empty represents empty string. Its value is equal to "".

Jibesh 18-Dec-12 5:12am

Please add a more relevant question. we can explain lot about one single line. variable is private
static, read only and variable type string each item can be explained again in deep so be precise in your question for a better answer.

5 solutions

Solution 2

it just represents empty value u r not assigning any value for that. thats it.

Posted 17-Dec-12 23:12pm

Dhritirao's

Solution 3

http://www.dotnetperls.com/isnullorempty[^]

Posted 17-Dec-12 23:18pm

AshishChaudha

Solution 4

The first line is DECLARING/DEFINING a string called _ConnString and the following portion initiualises it to nothing or empty.

The second line then continues where the first line left off and.......

Now that we are sure the _ConnString variable is empty...

A connection object is defined and created and the connectionstring property of the connection object is set to EQUAL the _ConnString value

so the second line defines a connection object and sets its connectionstring to nothing or empty.

Posted 17-Dec-12 23:39pm

Zaf Khan

Solution 5

refer this
http://msdn.microsoft.com/en-us/library/system.string.empty.aspx[^]

Posted 20-Dec-12 1:03am

swapymore_01

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Aarti Meswania · Accepted Answer · 2012-12-17T23:10:00

Solution 1

String.Empty is same as "" [nothing in double quotes]

txtbox1.text = String.Empty
and
txtbox1.text = ""

both are same

private static readonly string _connString = String.Empty;

means 
a read-only 
static (Shared = no instance specific class specific) 
variable 
_ConnString 
has been set to empty string

Happy Coding!
:)

Posted 17-Dec-12 23:10pm

Aarti Meswania

Comments

Software Engineer 892 18-Dec-12 6:16am

Thanks a lot.....

Aarti Meswania 18-Dec-12 6:19am

welcome! :)
Glad to help you! :)

adriancs 18-Dec-12 8:13am

whats the different between
<pre>public static readonly string SomeStr = "abcd";</pre>
and
<pre>public const string SomeStr = "abcd";</pre>?

Aarti Meswania 18-Dec-12 8:18am

constant => can be modified runtime...

static readonly => can be modified runtime...
the containing class is allowed to modify it only