correct me??

I've created C#.net program (behind code style).

when I run it in Internet explorer, the following error occurs in IE window.

pls instruct me how to handle and correct this error.

And how to initialize the connectionstring... Great thank!

Server Error in '/' Application.

------------------------

The ConnectionString property has not been initialized.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: The ConnectionString property has not been initialized.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[InvalidOperationException: The ConnectionString property has not been initialized.]
System.Data.SqlClient.SqlConnection.Open() +809
CodeBox.BehindCode.getSubject() +80
CodeBox.BehindCode.Page_Load(Object sender, EventArgs e) +31
System.Web.UI.Control.OnLoad(EventArgs e) +67
System.Web.UI.Control.LoadRecursive() +29
System.Web.UI.Page.ProcessRequestMain() +724

------------------------

Version Information: Microsoft .NET Framework Version:1.0.3705.0; ASP.NET Version:1.0.3705.0

Hi,
You haven't posted the code that you are trying to execute.
From the error, it seems that you havent set the connection string property for your connection object.
You can initialize the connection string as follows:-
SqlConnection objCon = new SqlConnection("put your connection string here");
Thanks.|||if you still have the problem show us the code !!|||

hi! thanks...
but I still have problem...
I want to show you my code and error message...
here is my code...
SqlDataReader getSubject(){
//create instance of connection and command object

//SqlConnection myconnection=new SqlConnection(ConfigurationSettings.AppSettings["connectionString"]);
constring ="DSN=fisca;User ID=sa;Password=admin;";
SqlConnection myconnection = new SqlConnection(constring);

SqlCommand mycommand=new SqlCommand("select * from Subject",myconnection);
//open the database connection and execute the command
myconnection.Open();
SqlDataReader result=mycommand.ExecuteReader(CommandBehavior.CloseConnection);
return result;
}

here is error message. I sure that dsn is really existing and userid, password of sql server is true....
and I also sure that variable constring is declared.

Server Error in '/' Application.

---

Unknown connection option in connection string: dsn.

Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details:System.ArgumentException: Unknown connection option in connection string: dsn.
Source Error:

Line 77: //SqlConnection myconnection=new SqlConnection(ConfigurationSettings.AppSettings["connectionString"]);Line 78: constring ="DSN=fisca;User ID=sa;Password=admin;";Line 79: SqlConnection myconnection = new SqlConnection(constring);Line 80: Line 81: SqlCommand mycommand=new SqlCommand("select * from Subject",myconnection);

Source File:c:\inetpub\wwwroot\CourseRequisition.cs Line:79
Stack Trace:

[ArgumentException: Unknown connection option in connection string: dsn.] System.Data.SqlClient.ConStringUtil.ParseStringIntoHashtable(String conString, Hashtable values) +673 System.Data.SqlClient.ConStringUtil.ParseConnectionString(String connectionString) +55 System.Data.SqlClient.SqlConnection.set_ConnectionString(String value) +375 System.Data.SqlClient.SqlConnection..ctor(String connectionString) +164 CodeBox.BehindCode.getSubject() in c:\inetpub\wwwroot\CourseRequisition.cs:79 CodeBox.BehindCode.Page_Load(Object sender, EventArgs e) in c:\inetpub\wwwroot\CourseRequisition.cs:36 System.Web.UI.Control.OnLoad(EventArgs e) +67 System.Web.UI.Control.LoadRecursive() +29 System.Web.UI.Page.ProcessRequestMain() +724

---

Version Information: Microsoft .NET Framework Version:1.0.3705.0; ASP.NET Version:1.0.3705.0|||

here is my code...

SqlDataReader getSubject(){
//create instance of connection and command object
SqlConnection myconnection=new SqlConnection(ConfigurationSettings.AppSettings["connectionString"]);
SqlCommand mycommand=new SqlCommand("select * from Subject",myconnection);
//open the database connection and execute the command
myconnection.Open();
SqlDataReader result=mycommand.ExecuteReader(CommandBehavior.CloseConnection);
return result;
}
but now I can find it out and I've corrected it myself.
cause I initialize connectionstring in web.config file. It can put away error.
so now I want to know that is there many ways to connect to sql server?...
how many way?
I just know two way,
1. Sqlconnection constring=new Sqlconnection("connection string");
2. SqlConnection myconnection=new SqlConnection(ConfigurationSettings.AppSettings["connectionString"]);
so pls let me know. cause I willingly want to know C#.net thoroughly.
I also learning it from book and creating C#.net application..
Have a bright and wonderful day!

|||the connection string that you provided is not correct !!!
look atwww.connstingSttings.com and see the proper contents of the connection string try to look the connetion string and if you still have problem get back to me