Re: Type: NullReferenceException, Exception Message: Object reference not set to an instance of an object

Jimmy — Sat, 05 Mar 2011 04:23:04 GMT

Could you attach a screenshot of your main data source?

Re: Type: NullReferenceException, Exception Message: Object reference not set to an instance of an object

g21cincy — Fri, 04 Mar 2011 16:50:16 GMT

I'm pretty sure it's all the lines with the [" & iCounter ] in them but I'm not sure how to fix my problem.

Re: Type: NullReferenceException, Exception Message: Object reference not set to an instance of an object

Jimmy — Fri, 04 Mar 2011 16:31:30 GMT

Were you able to determine which line was causing the error?

Re: Type: NullReferenceException, Exception Message: Object reference not set to an instance of an object

g21cincy — Fri, 04 Mar 2011 16:23:44 GMT

I ran the code through the debugger and it gave me these troubleshooting tips:

Use the "new" keyword to creat an object instance.

Check to determine if the object is null before calling the method.

Re: Type: NullReferenceException, Exception Message: Object reference not set to an instance of an object

Jimmy — Fri, 04 Mar 2011 15:59:29 GMT

Most likely there's an issue with one of the XPaths you're using. Have you tried walking the code in the debugger to see where the error is happening?

Type: NullReferenceException, Exception Message: Object reference not set to an instance of an object

g21cincy — Fri, 04 Mar 2011 15:55:00 GMT

Hello,

I'm getting this error when trying to send an email out. Below is the code I'm using. I'm taking the data from a repeating table from each row where the "Add Trainee" checkbox is checked and sending separate email(s) out to the RequestorEmail field(s) to let them know their request has been filled. Any help would be greatly appreciated

Private Sub SendEmailToRequestor(ByVal GoToPacketSelection As Boolean)

Dim Nav As XPathNavigator = Me.DataSources("Training Classes").CreateNavigator()

Dim rows As XPathNodeIterator = Nav.Select("/dfs:myFields/dfs:dataFields/d:tblTrainingClasses", NamespaceManager)

Dim iCounter As Integer = 1While rows.MoveNext()

If GetValue("/dfs:myFields/dfs:dataFields/d:tblTrainingClasses[" & iCounter & "]/@AddTrainee", Nav) = "yes" Then

Dim RequestorName As String = MainDataSource.CreateNavigator().SelectSingleNode("/dfs:myFields/my:RequestorName", NamespaceManager).Value

Dim RequestorEmail As String = MainDataSource.CreateNavigator().SelectSingleNode("/dfs:myFields/dfs:dataFields/d:tblTrainingClasses[" & iCounter & "]/@RequestorEmail", NamespaceManager).Value

Dim TraineeName As String = MainDataSource.CreateNavigator().SelectSingleNode("/dfs:myFields/dfs:dataFields/d:tblTrainingClasses[" & iCounter & "]/@NameOfTrainee", NamespaceManager).Value

Dim Priority As String = MainDataSource.CreateNavigator().SelectSingleNode("/dfs:myFields/dfs:dataFields/d:tblTrainingClasses[" & iCounter & "]/@Priority", NamespaceManager).Value

Dim EduationalCategory As String = MainDataSource.CreateNavigator().SelectSingleNode("/dfs:myFields/dfs:dataFields/d:tblTrainingClasses[" & iCounter & "]/@EduationalCategory", NamespaceManager).Value

Dim Department As String = MainDataSource.CreateNavigator().SelectSingleNode("/dfs:myFields/dfs:dataFields/d:tblTrainingClasses[" & iCounter & "]/@Department", NamespaceManager).Value

Dim ClassName As String = MainDataSource.CreateNavigator().SelectSingleNode("/dfs:myFields/dfs:queryFields/q:tblTrainingClasses/@ClassQuery", NamespaceManager).Value

Dim DateEnrolled As Date = MainDataSource.CreateNavigator().SelectSingleNode("/dfs:myFields/dfs:queryFields/q:tblTrainingClasses/@TimeQuery", NamespaceManager).Value

Dim TimeEnrolled As String = MainDataSource.CreateNavigator().SelectSingleNode("/dfs:myFields/dfs:queryFields/q:tblTrainingClasses/@TimeQuery", NamespaceManager).Value

Dim fromAddress As MailAddress = New MailAddress("email@email.com")

Dim toAddress As MailAddress = New MailAddress(RequestorEmail)

Dim msgmail As MailMessage = New MailMessage(fromAddress, toAddress)

Select Case RequestorEmail

Case Is = "email@email.net"

RequestorName = "name"

Case Is = "email1@email.net"

RequestorName = "name1"

Case Is = "email2@email.net"

RequestorName = "name2"

End Select

msgmail.Subject = "MRSI Training form Enroll Request Fulfilled"

msgmail.Body = RequestorName + "," + System.Environment.NewLine + _

" " + System.Environment.NewLine + _

"An enroll request that you submitted has been fulfilled with the following information:" + System.Environment.NewLine + _

" " + System.Environment.NewLine + _

"Trainee Name: " + TraineeName + System.Environment.NewLine + _

"Priority: " + Priority + System.Environment.NewLine + _

"Educational Category: " + EduationalCategory + System.Environment.NewLine + _

"Department: " + Department + System.Environment.NewLine + _

"Class: " + ClassName + System.Environment.NewLine + _ "Date: " + DateEnrolled + System.Environment.NewLine + _

"Time: " + TimeEnrolled + " "

Dim client As SmtpClient = New SmtpClient("exchange_server_here")

client.Credentials = New System.Net.NetworkCredential("username", "password")

client.Send(msgmail)

End If

iCounter += 1

End While

End Sub

General

Re: Type: NullReferenceException, Exception Message: Object reference not set to an instance of an object

Re: Type: NullReferenceException, Exception Message: Object reference not set to an instance of an object

Re: Type: NullReferenceException, Exception Message: Object reference not set to an instance of an object

Re: Type: NullReferenceException, Exception Message: Object reference not set to an instance of an object

Re: Type: NullReferenceException, Exception Message: Object reference not set to an instance of an object

Type: NullReferenceException, Exception Message: Object reference not set to an instance of an object