An unhandled exception of type 'System.NullReferenceException' occurred

[urukundappa]

Hi this is chandu,

can some help me out in this regard?

I had created an Active X dll.

I had registered it into the folder from where I want it to make it as .Net dll.

I had used the command as

tlbimp PhysServer.dll /out:NETPhysServ er.dll
from the .net cmd prompt.

Now I had written the code in vb.net as below to access this dll

Private WithEvents moTemp As NETPhysServer.T emperature

Private Sub cmdConvertToC_C lick(ByVal sender As System.Object, ByVal e As System.EventArg s) Handles cmdConvertToC.C lick
lblBelowFreezin g.Visible = False
lblAboveBoiling .Visible = False
With moTemp
.Fahrenheit = txtFahrenheit.T ext
txtCelsius.Text = .GetCelsius
End With
End Sub

Private Sub cmdConvertToF_C lick(ByVal sender As System.Object, ByVal e As System.EventArg s) Handles cmdConvertToF.C lick
lblBelowFreezin g.Visible = False
lblAboveBoiling .Visible = False
With moTemp
.Celsius = txtCelsius.Text
txtFahrenheit.T ext = .GetFahrenheit
End With
End Sub

Private Sub Form1_Load(ByVa l sender As System.Object, ByVal e As System.EventArg s) Handles MyBase.Load
' moTemp = New NETPhysServer.T emperature
End Sub

Private Sub moTemp_AboveBoi ling() Handles moTemp.AboveBoi ling
lblAboveBoiling .Visible = True
End Sub

Private Sub moTemp_BelowFre ezing() Handles moTemp.BelowFre ezing
lblBelowFreezin g.Visible = True
End Sub


When I try to debug this code I am getting an erro saying
"An unhandled exception of type 'System.NullRef erenceException ' occurred "

Please help me out to figure out this

[Niheel]

Discussion moved to .net forum.

[bplacker]

do you know which line the error occured on?