I have the following and am crashing at the specified line. I've declared Function Globals which should extend the scope of a variable to the end of the funtion. But it seems that my varaiables are ending at the end of the case statement. They shouldn't be. I'm really starting to wondering if I found a bug being that the variables have been declared Globally.
Public Function Scrape(ByVal URL As String, ByVal ReadandWrite As Boolean, ByVal FileType As String) As Object
Dim objWebRequest As System.Net.HttpWebRequest
Dim objWebResponse As System.Net.HttpWebResponse
Dim file As System.IO.StreamReader
Dim strFile As String
Select Case URL
Case "Text File"
file = New System.IO.StreamReader(URL)
Case "URL File"
objWebRequest = CType(System.Net.WebRequest.Create(URL), System.Net.HttpWebRequest)
objWebRequest.Method = "GET"
objWebResponse = CType(objWebRequest.GetResponse(), System.Net.HttpWebResponse)
file = New System.IO.StreamReader(objWebResponse.GetResponseS tream)
End Select
'Program crashes right here.
strFile = file.ReadToEnd
If ReadandWrite Then
Scrape = strFile
'Program crashes here too if the above line was set in the Global as 'Dim strFile as String = file.ReadToEnd
file.Close()
Return Scrape
End If
6  1521 
How about giving us some information about the exception that was thrown?
Since you know where it crashes, put that code in a Try...Catch statement.
Catch the exception and get it's type if need be.
"Bryan" <an*******@discussions.microsoft.com> wrote in message
news:D4**********************************@microsof t.com... I have the following and am crashing at the specified line. I've declared
Function Globals which should extend the scope of a variable to the end of
the funtion. But it seems that my varaiables are ending at the end of the
case statement. They shouldn't be. I'm really starting to wondering if I
found a bug being that the variables have been declared Globally.
Public Function Scrape(ByVal URL As String, ByVal ReadandWrite As
Boolean, ByVal FileType As String) As Object
Dim objWebRequest As System.Net.HttpWebRequest
Dim objWebResponse As System.Net.HttpWebResponse
Dim file As System.IO.StreamReader
Dim strFile As String
Select Case URL
Case "Text File"
file = New System.IO.StreamReader(URL)
Case "URL File"
objWebRequest = CType(System.Net.WebRequest.Create(URL),
System.Net.HttpWebRequest) objWebRequest.Method = "GET"
objWebResponse = CType(objWebRequest.GetResponse(),
System.Net.HttpWebResponse) file = New
System.IO.StreamReader(objWebResponse.GetResponseS tream) End Select
'Program crashes right here.
strFile = file.ReadToEnd
If ReadandWrite Then
Scrape = strFile
'Program crashes here too if the above line was set in the Global as 'Dim
strFile as String = file.ReadToEnd file.Close()
Return Scrape
End If
How about giving us some information about the exception that was thrown?
Since you know where it crashes, put that code in a Try...Catch statement.
Catch the exception and get it's type if need be.
"Bryan" <an*******@discussions.microsoft.com> wrote in message
news:D4**********************************@microsof t.com... I have the following and am crashing at the specified line. I've declared
Function Globals which should extend the scope of a variable to the end of
the funtion. But it seems that my varaiables are ending at the end of the
case statement. They shouldn't be. I'm really starting to wondering if I
found a bug being that the variables have been declared Globally.
Public Function Scrape(ByVal URL As String, ByVal ReadandWrite As
Boolean, ByVal FileType As String) As Object
Dim objWebRequest As System.Net.HttpWebRequest
Dim objWebResponse As System.Net.HttpWebResponse
Dim file As System.IO.StreamReader
Dim strFile As String
Select Case URL
Case "Text File"
file = New System.IO.StreamReader(URL)
Case "URL File"
objWebRequest = CType(System.Net.WebRequest.Create(URL),
System.Net.HttpWebRequest) objWebRequest.Method = "GET"
objWebResponse = CType(objWebRequest.GetResponse(),
System.Net.HttpWebResponse) file = New
System.IO.StreamReader(objWebResponse.GetResponseS tream) End Select
'Program crashes right here.
strFile = file.ReadToEnd
If ReadandWrite Then
Scrape = strFile
'Program crashes here too if the above line was set in the Global as 'Dim
strFile as String = file.ReadToEnd file.Close()
Return Scrape
End If
Here is the error
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 23: If ReadandWrite The
Line 24: Scrape = strFil
Line 25: file.Close() 'Error occurs her
Line 26: Return Scrap
Line 27: End I
Source File: c:\inetpub\wwwroot\CompetitorKiller\ScreenScraper. vb Line: 25
Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.
CompetitorKiller.ScreenScraper.Scrape(String URL, Boolean ReadandWrite, String FileType) in c:\inetpub\wwwroot\CompetitorKiller\ScreenScraper. vb:2
CompetitorKiller.WebForm1.Button1_Click(Object sender, EventArgs e) in c:\inetpub\wwwroot\CompetitorKiller\WebForm1.aspx. vb:3
System.Web.UI.WebControls.Button.OnClick(EventArgs e
System.Web.UI.WebControls.Button.System.Web.UI.IPo stBackEventHandler.RaisePostBackEvent(String eventArgument
System.Web.UI.Page.RaisePostBackEvent(IPostBackEve ntHandler sourceControl, String eventArgument
System.Web.UI.Page.RaisePostBackEvent(NameValueCol lection postData
System.Web.UI.Page.ProcessRequestMain(
Here is the error
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 23: If ReadandWrite The
Line 24: Scrape = strFil
Line 25: file.Close() 'Error occurs her
Line 26: Return Scrap
Line 27: End I
Source File: c:\inetpub\wwwroot\CompetitorKiller\ScreenScraper. vb Line: 25
Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.
CompetitorKiller.ScreenScraper.Scrape(String URL, Boolean ReadandWrite, String FileType) in c:\inetpub\wwwroot\CompetitorKiller\ScreenScraper. vb:2
CompetitorKiller.WebForm1.Button1_Click(Object sender, EventArgs e) in c:\inetpub\wwwroot\CompetitorKiller\WebForm1.aspx. vb:3
System.Web.UI.WebControls.Button.OnClick(EventArgs e
System.Web.UI.WebControls.Button.System.Web.UI.IPo stBackEventHandler.RaisePostBackEvent(String eventArgument
System.Web.UI.Page.RaisePostBackEvent(IPostBackEve ntHandler sourceControl, String eventArgument
System.Web.UI.Page.RaisePostBackEvent(NameValueCol lection postData
System.Web.UI.Page.ProcessRequestMain(
Your code doesn't make sense.
Change this line
Select Case URL
to read this:
Select Case FileType
I tried your code this way and it worked perfectly. Your select case
never selected any statement. That's why you got an error. Your
filestream was never craeted.
Bryan wrote: Here is the error:
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 23: If ReadandWrite Then
Line 24: Scrape = strFile
Line 25: file.Close() 'Error occurs here
Line 26: Return Scrape
Line 27: End If
Source File: c:\inetpub\wwwroot\CompetitorKiller\ScreenScraper. vb Line: 25
Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.]
CompetitorKiller.ScreenScraper.Scrape(String URL, Boolean ReadandWrite, String FileType) in c:\inetpub\wwwroot\CompetitorKiller\ScreenScraper. vb:25
CompetitorKiller.WebForm1.Button1_Click(Object sender, EventArgs e) in c:\inetpub\wwwroot\CompetitorKiller\WebForm1.aspx. vb:39
System.Web.UI.WebControls.Button.OnClick(EventArgs e)
System.Web.UI.WebControls.Button.System.Web.UI.IPo stBackEventHandler.RaisePostBackEvent(String eventArgument)
System.Web.UI.Page.RaisePostBackEvent(IPostBackEve ntHandler sourceControl, String eventArgument)
System.Web.UI.Page.RaisePostBackEvent(NameValueCol lection postData)
System.Web.UI.Page.ProcessRequestMain()
Your code doesn't make sense.
Change this line
Select Case URL
to read this:
Select Case FileType
I tried your code this way and it worked perfectly. Your select case
never selected any statement. That's why you got an error. Your
filestream was never craeted.
Bryan wrote: Here is the error:
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 23: If ReadandWrite Then
Line 24: Scrape = strFile
Line 25: file.Close() 'Error occurs here
Line 26: Return Scrape
Line 27: End If
Source File: c:\inetpub\wwwroot\CompetitorKiller\ScreenScraper. vb Line: 25
Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.]
CompetitorKiller.ScreenScraper.Scrape(String URL, Boolean ReadandWrite, String FileType) in c:\inetpub\wwwroot\CompetitorKiller\ScreenScraper. vb:25
CompetitorKiller.WebForm1.Button1_Click(Object sender, EventArgs e) in c:\inetpub\wwwroot\CompetitorKiller\WebForm1.aspx. vb:39
System.Web.UI.WebControls.Button.OnClick(EventArgs e)
System.Web.UI.WebControls.Button.System.Web.UI.IPo stBackEventHandler.RaisePostBackEvent(String eventArgument)
System.Web.UI.Page.RaisePostBackEvent(IPostBackEve ntHandler sourceControl, String eventArgument)
System.Web.UI.Page.RaisePostBackEvent(NameValueCol lection postData)
System.Web.UI.Page.ProcessRequestMain()
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