namespace name in asp.net c#

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I working on project on asp.net C# . i have login page 'Login.aspx'. this page does'nt have master page. i already create dboperation class. and this class using login page by creating object of dboperation class. It is working on localhost. then i upload this to my server. but it shows an error in 'Login.aspx' page.

The error is

Compiler Error Message: CS0246: The type or namespace name 'Dboperation' could not be found (are you missing a using directive or an assembly reference?)

Source Error:

Line 15: public partial class Login : System.Web.UI.Page
Line 16: {
Line 17:     Dboperation Db = new Dboperation();
Line 18:     string a = "Admin/Principal";
Line 19:     string s = "Students";

Please help me.

Posted 11-Sep-11 23:18pm

ijaziju

Updated 11-Sep-11 23:23pm

Prerak Patel

v2

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Prerak Patel 12-Sep-11 5:24am

Added pre tag for error.

AmitChoudhary10 12-Sep-11 5:25am

Is Dboperation Class is in the same Namespace as Class Login?

ijaziju 12-Sep-11 5:34am

i am using this class by creating an object of dboperation class.
eg:
Dboperation Db = new Dboperation();

4 solutions

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OriginalGriff · Answer 1 · 2011-09-11T23:23:00

Solution 1

Place the cursor over the word "Dboperation" in your code. Do you get a small red line? If so, hover the mouse over it, and open the dropdown that will appear. You will gets options from VS that will fix it.
If you don't, then Dboperation can't be found - you may have got the capitalization wrong, you may need to locate the DLL, or move the appropriate .cs file into the App_Code folder.

Posted 11-Sep-11 23:23pm

OriginalGriff

Comments

ijaziju 12-Sep-11 5:31am

i not get any small red line on it.
it is working on localhost. but it can't work in server.

OriginalGriff 12-Sep-11 5:40am

How are you transferring to the server?

OriginalGriff 12-Sep-11 6:03am

I use it too, but you have to be careful - don't copy your development Web.Config! :laugh:
Is your Dboperation in a .cs file in the App_code folder? If so (and it probably should be) did you copy that as well?

ijaziju 12-Sep-11 8:01am

dboperation class is in App_code folder.

OriginalGriff 12-Sep-11 8:37am

If the class is in the App_code folder on the server, then:
1) Check the case very carefully - I know you know this, but VS is case sensitive and it is easy to make a mistake.
2) Check the Dboperation.cs file: Is there a namespace instruction?
3) In your login class code, try typing "Dbo" on a new line - what does Intellisense suggest?

ijaziju 13-Sep-11 1:51am

it is wroking on local server.. there is no erros in local server..

but the problem is in server

OriginalGriff 13-Sep-11 3:53am

No, the problem is that there is a difference between the development setup and the production. This could be as simple as an outdated file that you did not copy to the server.

ijaziju 14-Sep-11 6:06am

how solve this issue?

Abhinav S · Answer 2 · 2011-09-11T23:24:00

Solution 2

Is the reference to namespace that contains class DBoperation missing in your code?
Also the class itself could be missing so make sure its none of the two.

Posted 11-Sep-11 23:24pm

Abhinav S

AmitChoudhary10 · Answer 3 · 2011-09-11T23:38:00

Solution 3

I guess this Dboperation class lies within a different Namespace than Login. So, write it as :-

Namespace.Dboperation Db = new Namespace.Dboperation();

and reference the dll in which the Dboperation lies in within your Project.

Posted 11-Sep-11 23:38pm

AmitChoudhary10

Updated 11-Sep-11 23:41pm

v2

Comments

ijaziju 12-Sep-11 5:42am

i use this solution but it repeat same error again

Timberbird · Answer 4 · 2011-09-11T23:49:00

Solution 4

If your Dboperation class is in another assembly, make sure you deploy this assembly on your server when publishing

Posted 11-Sep-11 23:49pm

Timberbird

Comments

ijaziju 12-Sep-11 5:58am

how to perform this?

Timberbird 12-Sep-11 6:02am

I don't know how you deploy it, that's hard to tell :). Try putting this assembly in your site bin directory, or register it in GAC