C# Frequently Asked Questions - All Comments

re: Why do I get the error "Object reference not set to an instance of an object"?

Shahid Ali — Thu, 23 May 2013 05:25:07 GMT

I am New to .Net Technology in my project

when I search something in my database using search button the same exception occur

Here is my Search button code

DataTable dt = new DataTable();

Setup s = new Setup();

Grid_Trans_Search.DataSource = s.Get_Tranc_Master_Search(txt_Trans_Type_Desc_Search.Text);

Grid_Trans_Search.DataBind();

panel_gdview.Visible = false;

panel_gdview_Search.Visible = true;

And

Calling Store data procedure

public DataTable Get_Tranc_Master_Search(string Transection_Type_Desc)

{

SqlParameter[] param = new SqlParameter[1];

param[0] = new SqlParameter("@Transection_Type_Desc", Transection_Type_Desc);

DataAccessLayer da = new DataAccessLayer();

DataSet ds = da.getDataByParam(param, "[Get_Tranc_Master_Search]");

return ds.Tables[0];

}

how can I find out the solution

re: Parallel Programming in .NET Framework 4: Getting Started

Purnima — Fri, 17 May 2013 07:58:32 GMT

The content was very helpful .This article really gave me the view of Tasks concept.Very graceful example and explanation.Keep posting.

re: Why doesn't C# support static method variables?

DaveSLC — Thu, 16 May 2013 20:28:47 GMT

I disagree with these "reasons" C# doesn't support static variables in methods. Particularly the statement that "statics are somewhat notorious for causing problems when code is called repeatedly or from multiple threads"...it is precisely because of multiple threads that static variables can be useful in methods. They can, for example, be used for throttling or to prevent re-entrancy.

re: What are the advantages of C# over VB.NET and vice versa?

Jalle — Thu, 16 May 2013 13:09:21 GMT

1. Why do I have to type semicolon ( ; ) after EVERY command EVEN 99% of them are on single line ?

2. Would you mind if someone tells you that "You" <> "you" ?!

3. Did you ever find yourself looking for the missing Braces ( }}}}}} ) in the code?

My suggestion, if you know English choose VB !

c# will vanish !!!

re: How do I cast a string to an int, float, double, etc?

praveen — Fri, 10 May 2013 12:51:43 GMT

good one..

But my question is when u create dynamic textbox, how to fetch the value from textbox and convert it into string

re: Microsoft "Roslyn" September 2012 CTP now available

Warren — Sat, 04 May 2013 03:13:17 GMT

Release date? Also what are the chances of being able to ship the binaries in a beta?

re: Why doesn't C# support static method variables?

Addam — Fri, 03 May 2013 19:27:48 GMT

How about this for a good use. I would really like this to not be a global variable since i have lots of registry values to read.

class a{

shared bool some_value;

public static bool hasEverBeenConfigured

{

get

{

static bool readRegistry = true;

if(readRegistry)

{

readRegistry = false;

some_value = readfromregistry;

}

return some_value;

}

re: Parallel Programming: Task Cancellation

RockyLOMO — Fri, 03 May 2013 10:15:48 GMT

thx

re: What character escape sequences are available?

George — Thu, 25 Apr 2013 18:06:18 GMT

Can the horizontal tab width be modified? EX: make it 1 space instead of 4...

re: How can I run another application or batch file from my Visual C# .NET code?

fatemeh — Thu, 18 Apr 2013 12:49:15 GMT

how can define "processResults"?????