.ocx with ASP.NET

D

dikeyus

I must use a component in my ASP.NET project but couldn't do it. There is a mistake anywhere .
I use Microsoft Visual Studio.NET 2003
I'm making a new project and add MSFlexGrid to my WebForm1.aspx
I'm adding MSFlexGrid from Project->Add References too

When Run this project it's give an error at WebForm1.aspx.vb at MSFlex.Col = 1

System.Runtime.InteropServices.COMException: The server threw an exception.


My WebForm1.aspx like this

<%@ Page Language="vb" AutoEventWireup="false" Codebehind="WebForm1.aspx.vb" Inherits="geoview.WebForm1"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>WebForm1</title>
<meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" content="Visual Basic .NET 7.1">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">

<OBJECT id=MSFlex classid=clsid:6262D3A0-531B-11CF-91F6-C2863C385E30>
<PARAM NAME="_ExtentX" VALUE="2646">
<PARAM NAME="_ExtentY" VALUE="1323">
<PARAM NAME="_Version" VALUE="393216">
<PARAM NAME="Rows" VALUE="2">
<PARAM NAME="Cols" VALUE="2">
<PARAM NAME="FixedRows" VALUE="1">
<PARAM NAME="FixedCols" VALUE="1">
<PARAM NAME="RowHeightMin" VALUE="0">
<PARAM NAME="BackColor" VALUE="-2147483643">
<PARAM NAME="ForeColor" VALUE="-2147483640">
<PARAM NAME="BackColorFixed" VALUE="-2147483633">
<PARAM NAME="ForeColorFixed" VALUE="-2147483630">
<PARAM NAME="BackColorSel" VALUE="-2147483635">
<PARAM NAME="ForeColorSel" VALUE="-2147483634">
<PARAM NAME="BackColorBkg" VALUE="8421504">
<PARAM NAME="GridColor" VALUE="12632256">
<PARAM NAME="GridColorFixed" VALUE="0">
<PARAM NAME="WordWrap" VALUE="0">
<PARAM NAME="Redraw" VALUE="-1">
<PARAM NAME="AllowBigSelection" VALUE="-1">
<PARAM NAME="ScrollTrack" VALUE="0">
<PARAM NAME="Enabled" VALUE="-1">
<PARAM NAME="RightToLeft" VALUE="0">
<PARAM NAME="TextStyle" VALUE="0">
<PARAM NAME="TextStyleFixed" VALUE="0">
<PARAM NAME="FocusRect" VALUE="1">
<PARAM NAME="HighLight" VALUE="1">
<PARAM NAME="FillStyle" VALUE="0">
<PARAM NAME="GridLines" VALUE="1">
<PARAM NAME="GridLinesFixed" VALUE="2">
<PARAM NAME="ScrollBars" VALUE="3">
<PARAM NAME="SelectionMode" VALUE="0">
<PARAM NAME="MergeCells" VALUE="0">
<PARAM NAME="AllowUserResizing" VALUE="0">
<PARAM NAME="PictureType" VALUE="0">
<PARAM NAME="BorderStyle" VALUE="1">
<PARAM NAME="Appearance" VALUE="1">
<PARAM NAME="MousePointer" VALUE="0">
<PARAM NAME="GridLineWidth" VALUE="1">
<PARAM NAME="FormatString" VALUE="">
<PARAM NAME="OLEDropMode" VALUE="0">
</OBJECT>

</form>
</body>
</HTML>


And My WebForm1.aspx.vb like this


Public Class WebForm1
Inherits System.Web.UI.Page
'Protected WithEvents MSFlex As MSFlexGridLib.MSFlexGrid
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
End Sub

'NOTE: The following placeholder declaration is required by the Web Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object

Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub

#End Region

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
Dim MSFlex As MSFlexGridLib.MSFlexGrid
MSFlex = New MSFlexGridLib.MSFlexGrid
MSFlex.Col = 1
MSFlex.Row = 1
MSFlex.Text = "abc"
End Sub

End Class


**********************************************************************
Sent via Fuzzy Software @ http://www.fuzzysoftware.com/
Comprehensive, categorised, searchable collection of links to ASP & ASP.NET resources...
 
M

Mike Newton

OCX's don't run on the server side, they're only rendered on the client
side. If you want to set properties of the control, you have to use a
client-side script.

Trying to access properties of the control from the server will not
work, because the control doesn't exist on the server.
 
K

Kevin Spencer

Hi Dilek,

You're confusing client-side and server-side. An ActiveX control (.ocx) is a
client-side application. It is hosted in the browser. Your HTML is right,
but your CodeBehind is wrong. The ONLY thing you can use CodeBehind for with
an ActiveX Control is to (possibly, if necessary) modify the OBJECT tag that
is sent to the client. The ActiveX Control is fetched by the browser and run
on the client, according to the OBJECT tag in the HTML on the client.

--
HTH,
Kevin Spencer
..Net Developer
Microsoft MVP
I get paid good money to
solve puzzles for a living

Dilek KARAKAYA said:
I must use a component in my ASP.NET project but couldn't do it. There is a mistake anywhere .
I use Microsoft Visual Studio.NET 2003
I'm making a new project and add MSFlexGrid to my WebForm1.aspx
I'm adding MSFlexGrid from Project->Add References too

When Run this project it's give an error at WebForm1.aspx.vb at MSFlex.Col = 1

System.Runtime.InteropServices.COMException: The server threw an exception.


My WebForm1.aspx like this

<%@ Page Language="vb" AutoEventWireup="false"
Click to expand...
Codebehind="WebForm1.aspx.vb" Inherits="geoview.WebForm1"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>WebForm1</title>
<meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" content="Visual Basic .NET 7.1">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">

<OBJECT id=MSFlex classid=clsid:6262D3A0-531B-11CF-91F6-C2863C385E30>
<PARAM NAME="_ExtentX" VALUE="2646">
<PARAM NAME="_ExtentY" VALUE="1323">
<PARAM NAME="_Version" VALUE="393216">
<PARAM NAME="Rows" VALUE="2">
<PARAM NAME="Cols" VALUE="2">
<PARAM NAME="FixedRows" VALUE="1">
<PARAM NAME="FixedCols" VALUE="1">
<PARAM NAME="RowHeightMin" VALUE="0">
<PARAM NAME="BackColor" VALUE="-2147483643">
<PARAM NAME="ForeColor" VALUE="-2147483640">
<PARAM NAME="BackColorFixed" VALUE="-2147483633">
<PARAM NAME="ForeColorFixed" VALUE="-2147483630">
<PARAM NAME="BackColorSel" VALUE="-2147483635">
<PARAM NAME="ForeColorSel" VALUE="-2147483634">
<PARAM NAME="BackColorBkg" VALUE="8421504">
<PARAM NAME="GridColor" VALUE="12632256">
<PARAM NAME="GridColorFixed" VALUE="0">
<PARAM NAME="WordWrap" VALUE="0">
<PARAM NAME="Redraw" VALUE="-1">
<PARAM NAME="AllowBigSelection" VALUE="-1">
<PARAM NAME="ScrollTrack" VALUE="0">
<PARAM NAME="Enabled" VALUE="-1">
<PARAM NAME="RightToLeft" VALUE="0">
<PARAM NAME="TextStyle" VALUE="0">
<PARAM NAME="TextStyleFixed" VALUE="0">
<PARAM NAME="FocusRect" VALUE="1">
<PARAM NAME="HighLight" VALUE="1">
<PARAM NAME="FillStyle" VALUE="0">
<PARAM NAME="GridLines" VALUE="1">
<PARAM NAME="GridLinesFixed" VALUE="2">
<PARAM NAME="ScrollBars" VALUE="3">
<PARAM NAME="SelectionMode" VALUE="0">
<PARAM NAME="MergeCells" VALUE="0">
<PARAM NAME="AllowUserResizing" VALUE="0">
<PARAM NAME="PictureType" VALUE="0">
<PARAM NAME="BorderStyle" VALUE="1">
<PARAM NAME="Appearance" VALUE="1">
<PARAM NAME="MousePointer" VALUE="0">
<PARAM NAME="GridLineWidth" VALUE="1">
<PARAM NAME="FormatString" VALUE="">
<PARAM NAME="OLEDropMode" VALUE="0">
</OBJECT>

</form>
</body>
</HTML>


And My WebForm1.aspx.vb like this


Public Class WebForm1
Inherits System.Web.UI.Page
'Protected WithEvents MSFlex As MSFlexGridLib.MSFlexGrid
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
End Sub

'NOTE: The following placeholder declaration is required by the Web Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object

Private Sub Page_Init(ByVal sender As System.Object, ByVal e As
Click to expand...
System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub

#End Region

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
Click to expand...
System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
Dim MSFlex As MSFlexGridLib.MSFlexGrid
MSFlex = New MSFlexGridLib.MSFlexGrid
MSFlex.Col = 1
MSFlex.Row = 1
MSFlex.Text = "abc"
End Sub

End Class


**********************************************************************
Sent via Fuzzy Software @ http://www.fuzzysoftware.com/
Comprehensive, categorised, searchable collection of links to ASP &
Click to expand...
ASP.NET resources...
 
G

Guest

I just noticed this conversation. I'm trying to review ASP.Net in a hurry
for the usual reason (sudden job :) and I have a vague question.

In the most general sense, here is the problem. I've added an Ocx to my
toolbox and put a copy on the aspx page. This ocx somehow supposdly provides
access to a currently running application session through a COM dll.

The problem is that I'm now trying by trial and error to make use of it and
I'm not sure of the best possible approach. In general I would expect that I
would need to make a number of calls to the application and put the data on
the screen.

Given that, what is the general direction I should proceed in? Sorry I
can't be more specific.
 
K

Kevin Spencer

In the most general sense, here is the problem. I've added an Ocx to my
toolbox and put a copy on the aspx page. This ocx somehow supposdly provides
access to a currently running application session through a COM dll.
Click to expand...

An ActiveX Control is not a server-side object. It is downloaded and
executed in the client browser. The only thing you should be adding is an
The problem is that I'm now trying by trial and error to make use of it and
I'm not sure of the best possible approach. In general I would expect that I
would need to make a number of calls to the application and put the data on
the screen.
Click to expand...

An ActiveX Control is an application. How it works is, like any other app,
entirely up to the developer who created it in the first place..
Given that, what is the general direction I should proceed in? Sorry I
can't be more specific.
Click to expand...

Learn how ActiveX Controls work, how an <OBJECT> tag is used to embed the
ActiveX Control in the web page on the client, and how to use th <OBJECT>
tag to pass parameters to the Control. Other than that, how the Control
works, I can't tell you. Only the developer of the Control could tell you
that.

The following MSDN article should be useful:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnaxctrl/html/msdn_actxcont.asp

--
HTH,
Kevin Spencer
..Net Developer
Microsoft MVP
I get paid good money to
solve puzzles for a living
 
G

Guest

(Ironically enough, the purpose of the ocx to pass stuff out, not in,
specifically a hook to another currently running process.)

Can you point me to a good discussion on interaction betwee OCXs and ASP.Net
code? That other reference you gave seems to be solely focused on ActiveX.

Thanks!
 
K

Kevin Spencer

You don't understand. ActiveX has NOTHING to do with .Net. It runs entirely
on its own on the client browser.

An ASPX page delivers an HTML document to the client. An ActiveX Control is
just a bunch of text tags in an HTML document. Think of it as "staic HTML"
if you like. Now, there are some tricks you can do on the server side to
create the tags dynamically if needed, but all you're doing is modifying
text.

--
HTH,
Kevin Spencer
..Net Developer
Microsoft MVP
I get paid good money to
solve puzzles for a living
 
G

Guest

Perhaps I shouldn't have used the word interaction. Let me rephrase this
again.

What is the most common way (Is there any common way?) to move data between
ActiveX and ASP.Net? As I look at this problem, I'm thinking along the lines
of a webform button is clicked, triggering a script function which interacts
with an outside process and generates a value. How do I get that value into
an webform control like a textbox?
 
K

Kevin Spencer

An ActiveX Control is an application running on the client. ASP.Net is an
application running on the server. As they are both applications, there are
any number of ways they can communicate over a TCP/IP network. There is no
"most common way" for such communication to occur. It's all a matter of how
each app is built.

--
HTH,
Kevin Spencer
..Net Developer
Microsoft MVP
I get paid good money to
solve puzzles for a living
 

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