error:Object reference not set to an instance of an object.

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Server Error in '/MobileTimeTicket1' Application.
________________________________________
Object reference not set to an instance of an object.
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.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 68: mycon1.Close()
Line 69: da.Dispose()
Line 70: jobno.DataSource = ds
Line 71: jobno.DataTextField = "job_no"
Line 72: jobno.DataValueField = "job_no"

Source File: C:\Inetpub\wwwroot\MobileTimeTicket1\TimeTicket.aspx.vb Line: 70

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
MobileTimeTicket1.TimeTicket1.Page_Load(Object sender, EventArgs e) in C:\Inetpub\wwwroot\MobileTimeTicket1\TimeTicket.aspx.vb:70
System.Web.UI.Control.OnLoad(EventArgs e)
System.Web.UI.MobileControls.MobilePage.OnLoad(EventArgs e)
System.Web.UI.Control.LoadRecursive()
System.Web.UI.Page.ProcessRequestMain()

Posted 16-Nov-12 22:30pm

nityasri

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OriginalGriff · Answer 1 · 2012-11-16T23:23:00

Solution 1

jobno is null - so when you try to retrieve jobno.DataSource it throws an exception.

You need to assign jobno to an instance (of whatever class it is declared as being), either with the New keyword, or by assigning an existing instance to it.
Since you code fragment doesn't show the declaration or any other uses, I can't be more specific.

Posted 16-Nov-12 23:23pm

OriginalGriff

Comments

nityasri 18-Nov-12 10:43am

@griff..thank u

OriginalGriff 18-Nov-12 11:14am

You're welcome!