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GridView - ObjectDataSourc e NOT retrieving records

Hi ALL,
I wonder if anyone has been using n-tier to bind to a GridView control by
using the ObjectDataSourc e. This is our first OOP web application, and we
have no tables. Right now we are simply working with objects in memory.

So, it appears as though Microsoft requires that our datamapper classes
reside inside a folder called "App_Code", and NO WHERE ELSE.

So, has anyone successfully been able to place their datamappers in a
location other than "App_Code", and actually retrieve records from a
datamapper class?

TIA, Randy
Jan 8 '07 #1
5 2636
Hi Phillip,
I rally appreciate your help. I like your sample "Dropdownli st within a
GridView", but I do have a few questions about your ObjectDataSourc e.

Here is the code I'm interested in:
<asp:ObjectData Source ID="odsProducts " runat="server"
SelectMethod="P roductByID"
TypeName="WEBSW APP_BLL.Demos"
DataObjectTypeN ame="WEBSWAPP_B LL.clsProduct">
<SelectParamete rs>
<asp:ControlPar ameter
ControlID="ddlP roducts" Name="productID " PropertyName="S electedValue"
Type="String" />
</SelectParameter s>
</asp:ObjectDataS ource>
1) I presume that "WEBSWAPP_B LL" is a DLL, right? Where is it located in
your folder structure?
2) I see that you are using "TypeName". I presume that "Demos" is the class
inside your "WEBSWAPP_B LL" DLL, right?
3) Did you have to add any specific entries into the web.config file to get
it to work?
4) I haven't seen your "default.aspx.c s" code, but do you have this
reference: "using WEBSWAPP_BLL;" (C#)?

Many thanks, Randy
"Phillip Williams" <WE******@newsg roups.nospamwro te in message
news:DA******** *************** ***********@mic rosoft.com...
Hello Randy,

You can compile your domain layer into a separate assembly and add a
reference to it in your project (all the demos on my website are build
using
this strategy) or you can also download the "Visual Studio 2005 Web
Application Projects" to build applications in the same way as you used to
VS2003 where you do not have to put your datamappers in the App_Code
folder
http://msdn2.microsoft.com/en-us/asp.net/aa336618.aspx

--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Randy Smith" wrote:
>Hi ALL,
I wonder if anyone has been using n-tier to bind to a GridView control by
using the ObjectDataSourc e. This is our first OOP web application, and
we
have no tables. Right now we are simply working with objects in memory.

So, it appears as though Microsoft requires that our datamapper classes
reside inside a folder called "App_Code", and NO WHERE ELSE.

So, has anyone successfully been able to place their datamappers in a
location other than "App_Code", and actually retrieve records from a
datamapper class?

TIA, Randy

Jan 9 '07 #2
Hi,
Well, I've changed my ObjectDataSourc e to match your examples, but I am
still not getting any data. I wonder if you can post the code for
"default.aspx.c s" (within "Dropdownli st within a GridView". I'm
particularly interested in seeing how you go about doing the "databind",
which may be my problem.
Many, many thanks!!! Randy
"Phillip Williams" <WE******@newsg roups.nospamwro te in message
news:34******** *************** ***********@mic rosoft.com...
Hello Randy,

For the purpose of my website where the demos do not have real business
logic (it is just a presentation logic built on top of a dataset),
WEBSWAPP_BLL is just a domain layer with a dataset.

The DAL in that demos website is a VS generated dataset named Samples.xsd
(which is not listed on the website). Its structure (a typed dataset of a
collection of datatables) is not necessary to understanding the demos that
I
placed to demonstrate the ASP.NET server controls features. I load it
into
the application cache to allow the users to write to the dataset in cache
but
then I do not persist their entries on the data store.

The class named WEBSWAPP_BLL.De mos is the compiled into a separate
assembly
from another project (class library), which is not within the folders
structure of the web application. I only add the compiled assembly (dll
file) to the bin folder on the web application (by adding a reference to
the
class library project into my web application project).

So to answer to your questions:
1- A separate class library project compiled into a dll that is copied to
the bin folder of the website
2- Yes
3- No.
4- No.
--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Randy Smith" wrote:
>Hi Phillip,
I rally appreciate your help. I like your sample "Dropdownli st within a
GridView", but I do have a few questions about your ObjectDataSourc e.

Here is the code I'm interested in:
<asp:ObjectData Source ID="odsProducts " runat="server"
SelectMethod=" ProductByID"
TypeName="WEBSW APP_BLL.Demos"
DataObjectType Name="WEBSWAPP_ BLL.clsProduct" >
<SelectParamete rs>
<asp:ControlPar ameter
ControlID="ddl Products" Name="productID " PropertyName="S electedValue"
Type="String" />
</SelectParameter s>
</asp:ObjectDataS ource>
1) I presume that "WEBSWAPP_B LL" is a DLL, right? Where is it located in
your folder structure?
2) I see that you are using "TypeName". I presume that "Demos" is the
class
inside your "WEBSWAPP_B LL" DLL, right?
3) Did you have to add any specific entries into the web.config file to
get
it to work?
4) I haven't seen your "default.aspx.c s" code, but do you have this
reference: "using WEBSWAPP_BLL;" (C#)?

Many thanks, Randy
"Phillip Williams" <WE******@newsg roups.nospamwro te in message
news:DA******* *************** ************@mi crosoft.com...
Hello Randy,

You can compile your domain layer into a separate assembly and add a
reference to it in your project (all the demos on my website are build
using
this strategy) or you can also download the "Visual Studio 2005 Web
Application Projects" to build applications in the same way as you used
to
VS2003 where you do not have to put your datamappers in the App_Code
folder
http://msdn2.microsoft.com/en-us/asp.net/aa336618.aspx

--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Randy Smith" wrote:

Hi ALL,
I wonder if anyone has been using n-tier to bind to a GridView control
by
using the ObjectDataSourc e. This is our first OOP web application,
and
we
have no tables. Right now we are simply working with objects in
memory.

So, it appears as though Microsoft requires that our datamapper
classes
reside inside a folder called "App_Code", and NO WHERE ELSE.

So, has anyone successfully been able to place their datamappers in a
location other than "App_Code", and actually retrieve records from a
datamapper class?

TIA, Randy



Jan 10 '07 #3
So,
Do I understand that you didn't need to do any sort of "databind"? I had
this code in my Page_Load event:
gvMaterialRates .DataSource = ObjectDataSourc e1;

gvMaterialRates .DataBind();

I've tried it several different ways:
1) As above
2) With the "DataSource " line commented out, and the other line active.
3) With the "DataBind" line commented out, and the other line active.
4) With both lines commented out.

I'll try the debug route and see what happens.

Randy
"Phillip Williams" <WE******@newsg roups.nospamwro te in message
news:17******** *************** ***********@mic rosoft.com...
Have you tried stepping in debug mode with break points within the BLL &
DAL
to see if the web interface is calling the methods of your object library?
It might be an issue of the structure of your namespaces. In my demos I
put
the fully qualified name of the class starting from the root namespace,
e.g.
WEBSWAPP_BLL.De mos is the fully qualified path.

In your case it might be something like MyCompany.Modul es.App1.classNa me.
Make sure you put the fully qualified path in the values for TypeName and
DataObjectTypeN ame properties of the ObjectDataSourc e. Then set break
points
within those methods to debug in VS.

--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Randy Smith" wrote:
>Hi,
Well, I've changed my ObjectDataSourc e to match your examples, but I am
still not getting any data. I wonder if you can post the code for
"default.aspx. cs" (within "Dropdownli st within a GridView". I'm
particularly interested in seeing how you go about doing the "databind",
which may be my problem.
Many, many thanks!!! Randy
"Phillip Williams" <WE******@newsg roups.nospamwro te in message
news:34******* *************** ************@mi crosoft.com...
Hello Randy,

For the purpose of my website where the demos do not have real business
logic (it is just a presentation logic built on top of a dataset),
WEBSWAPP_BLL is just a domain layer with a dataset.

The DAL in that demos website is a VS generated dataset named
Samples.xsd
(which is not listed on the website). Its structure (a typed dataset
of a
collection of datatables) is not necessary to understanding the demos
that
I
placed to demonstrate the ASP.NET server controls features. I load it
into
the application cache to allow the users to write to the dataset in
cache
but
then I do not persist their entries on the data store.

The class named WEBSWAPP_BLL.De mos is the compiled into a separate
assembly
from another project (class library), which is not within the folders
structure of the web application. I only add the compiled assembly
(dll
file) to the bin folder on the web application (by adding a reference
to
the
class library project into my web application project).

So to answer to your questions:
1- A separate class library project compiled into a dll that is copied
to
the bin folder of the website
2- Yes
3- No.
4- No.
--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Randy Smith" wrote:

Hi Phillip,
I rally appreciate your help. I like your sample "Dropdownli st within
a
GridView", but I do have a few questions about your ObjectDataSourc e.

Here is the code I'm interested in:
<asp:ObjectData Source ID="odsProducts " runat="server"
SelectMethod=" ProductByID"
TypeName="WEBSW APP_BLL.Demos"
DataObjectType Name="WEBSWAPP_ BLL.clsProduct" >
<SelectParamete rs>
<asp:ControlPar ameter
ControlID="ddl Products" Name="productID " PropertyName="S electedValue"
Type="String" />
</SelectParameter s>
</asp:ObjectDataS ource>
1) I presume that "WEBSWAPP_B LL" is a DLL, right? Where is it located
in
your folder structure?
2) I see that you are using "TypeName". I presume that "Demos" is the
class
inside your "WEBSWAPP_B LL" DLL, right?
3) Did you have to add any specific entries into the web.config file
to
get
it to work?
4) I haven't seen your "default.aspx.c s" code, but do you have this
reference: "using WEBSWAPP_BLL;" (C#)?

Many thanks, Randy
"Phillip Williams" <WE******@newsg roups.nospamwro te in message
news:DA******* *************** ************@mi crosoft.com...
Hello Randy,

You can compile your domain layer into a separate assembly and add a
reference to it in your project (all the demos on my website are
build
using
this strategy) or you can also download the "Visual Studio 2005 Web
Application Projects" to build applications in the same way as you
used
to
VS2003 where you do not have to put your datamappers in the App_Code
folder
http://msdn2.microsoft.com/en-us/asp.net/aa336618.aspx

--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Randy Smith" wrote:

Hi ALL,
I wonder if anyone has been using n-tier to bind to a GridView
control
by
using the ObjectDataSourc e. This is our first OOP web application,
and
we
have no tables. Right now we are simply working with objects in
memory.

So, it appears as though Microsoft requires that our datamapper
classes
reside inside a folder called "App_Code", and NO WHERE ELSE.

So, has anyone successfully been able to place their datamappers in
a
location other than "App_Code", and actually retrieve records from
a
datamapper class?

TIA, Randy




Jan 10 '07 #4
UPDATE:
I debugged the "FetchAllRa tes" and found that it was showing a count of ZERO
records, even though I have 3 rows in the object. It then dawned on me that
our consultant switched us over to ApplicationMana ger.cs. This piece of
code actually returns a count of 3, whereas my direct code retrieves ZERO.
lblRows.Text =
ApplicationMana ger.MaterialRat eDM.FetchAllRat es().Count.ToSt ring();
//returns 3 rows

Here's the code I was using for my ObjectDataSourc e:

<asp:ObjectData Source ID="ObjectDataS ource1" runat="server"

SelectMethod="F etchAllRates" TypeName="GWO.M aterialRateData Mapper"
EnablePaging="f alse">

</asp:ObjectDataS ource>

If I replace the "GWO.MaterialRa teDataMapper" with
"ApplicationMan ager.MaterialRa teDM", I get an error indicating that
"FetchAllRa tes" could not be found.
"Phillip Williams" <WE******@newsg roups.nospamwro te in message
news:CC******** *************** ***********@mic rosoft.com...
That's correct. The ObjectDataSourc e encapsulates the logic for
retrieving
the data and the GridView uses the value of the DataSourceID property to
locate the ObjectDataSourc e control within the page's controls hierarchy
and
automatically binds the data.

You can still use the programmatic approach if you wish, in which case you
would not need to place an ObjectDataSourc e on the page.

You can read further about the GridView:
http://msdn2.microsoft.com/en-gb/lib....gridview.aspx

--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Randy Smith" wrote:
>So,
Do I understand that you didn't need to do any sort of "databind"? I had
this code in my Page_Load event:
gvMaterialRates .DataSource = ObjectDataSourc e1;

gvMaterialRates .DataBind();

I've tried it several different ways:
1) As above
2) With the "DataSource " line commented out, and the other line active.
3) With the "DataBind" line commented out, and the other line active.
4) With both lines commented out.

I'll try the debug route and see what happens.

Randy
"Phillip Williams" <WE******@newsg roups.nospamwro te in message
news:17******* *************** ************@mi crosoft.com...
Have you tried stepping in debug mode with break points within the BLL
&
DAL
to see if the web interface is calling the methods of your object
library?
It might be an issue of the structure of your namespaces. In my demos I
put
the fully qualified name of the class starting from the root namespace,
e.g.
WEBSWAPP_BLL.De mos is the fully qualified path.

In your case it might be something like
MyCompany.Modul es.App1.classNa me.
Make sure you put the fully qualified path in the values for TypeName
and
DataObjectTypeN ame properties of the ObjectDataSourc e. Then set break
points
within those methods to debug in VS.

--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Randy Smith" wrote:

Hi,
Well, I've changed my ObjectDataSourc e to match your examples, but I
am
still not getting any data. I wonder if you can post the code for
"default.aspx. cs" (within "Dropdownli st within a GridView". I'm
particularly interested in seeing how you go about doing the
"databind",
which may be my problem.
Many, many thanks!!! Randy
"Phillip Williams" <WE******@newsg roups.nospamwro te in message
news:34******* *************** ************@mi crosoft.com...
Hello Randy,

For the purpose of my website where the demos do not have real
business
logic (it is just a presentation logic built on top of a dataset),
WEBSWAPP_BLL is just a domain layer with a dataset.

The DAL in that demos website is a VS generated dataset named
Samples.xsd
(which is not listed on the website). Its structure (a typed
dataset
of a
collection of datatables) is not necessary to understanding the
demos
that
I
placed to demonstrate the ASP.NET server controls features. I load
it
into
the application cache to allow the users to write to the dataset in
cache
but
then I do not persist their entries on the data store.

The class named WEBSWAPP_BLL.De mos is the compiled into a separate
assembly
from another project (class library), which is not within the
folders
structure of the web application. I only add the compiled assembly
(dll
file) to the bin folder on the web application (by adding a
reference
to
the
class library project into my web application project).

So to answer to your questions:
1- A separate class library project compiled into a dll that is
copied
to
the bin folder of the website
2- Yes
3- No.
4- No.
--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Randy Smith" wrote:

Hi Phillip,
I rally appreciate your help. I like your sample "Dropdownli st
within
a
GridView", but I do have a few questions about your
ObjectDataSour ce.

Here is the code I'm interested in:
<asp:ObjectData Source ID="odsProducts " runat="server"
SelectMethod=" ProductByID"
TypeName="WEBSW APP_BLL.Demos"
DataObjectType Name="WEBSWAPP_ BLL.clsProduct" >
<SelectParamete rs>
<asp:ControlPar ameter
ControlID="ddl Products" Name="productID "
PropertyName=" SelectedValue"
Type="String" />
</SelectParameter s>
</asp:ObjectDataS ource>
1) I presume that "WEBSWAPP_B LL" is a DLL, right? Where is it
located
in
your folder structure?
2) I see that you are using "TypeName". I presume that "Demos" is
the
class
inside your "WEBSWAPP_B LL" DLL, right?
3) Did you have to add any specific entries into the web.config
file
to
get
it to work?
4) I haven't seen your "default.aspx.c s" code, but do you have this
reference: "using WEBSWAPP_BLL;" (C#)?

Many thanks, Randy
"Phillip Williams" <WE******@newsg roups.nospamwro te in message
news:DA******* *************** ************@mi crosoft.com...
Hello Randy,

You can compile your domain layer into a separate assembly and
add a
reference to it in your project (all the demos on my website are
build
using
this strategy) or you can also download the "Visual Studio 2005
Web
Application Projects" to build applications in the same way as
you
used
to
VS2003 where you do not have to put your datamappers in the
App_Code
folder
http://msdn2.microsoft.com/en-us/asp.net/aa336618.aspx

--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Randy Smith" wrote:

Hi ALL,
I wonder if anyone has been using n-tier to bind to a GridView
control
by
using the ObjectDataSourc e. This is our first OOP web
application,
and
we
have no tables. Right now we are simply working with objects in
memory.

So, it appears as though Microsoft requires that our datamapper
classes
reside inside a folder called "App_Code", and NO WHERE ELSE.

So, has anyone successfully been able to place their datamappers
in
a
location other than "App_Code", and actually retrieve records
from
a
datamapper class?

TIA, Randy





Jan 10 '07 #5
Have you tried stepping in debug mode with break points within the BLL & DAL
to see if the web interface is calling the methods of your object library?
It might be an issue of the structure of your namespaces. In my demos I put
the fully qualified name of the class starting from the root namespace, e.g.
WEBSWAPP_BLL.De mos is the fully qualified path.

In your case it might be something like MyCompany.Modul es.App1.classNa me.
Make sure you put the fully qualified path in the values for TypeName and
DataObjectTypeN ame properties of the ObjectDataSourc e. Then set break points
within those methods to debug in VS.

--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Randy Smith" wrote:
Hi,
Well, I've changed my ObjectDataSourc e to match your examples, but I am
still not getting any data. I wonder if you can post the code for
"default.aspx.c s" (within "Dropdownli st within a GridView". I'm
particularly interested in seeing how you go about doing the "databind",
which may be my problem.
Many, many thanks!!! Randy
"Phillip Williams" <WE******@newsg roups.nospamwro te in message
news:34******** *************** ***********@mic rosoft.com...
Hello Randy,

For the purpose of my website where the demos do not have real business
logic (it is just a presentation logic built on top of a dataset),
WEBSWAPP_BLL is just a domain layer with a dataset.

The DAL in that demos website is a VS generated dataset named Samples.xsd
(which is not listed on the website). Its structure (a typed dataset of a
collection of datatables) is not necessary to understanding the demos that
I
placed to demonstrate the ASP.NET server controls features. I load it
into
the application cache to allow the users to write to the dataset in cache
but
then I do not persist their entries on the data store.

The class named WEBSWAPP_BLL.De mos is the compiled into a separate
assembly
from another project (class library), which is not within the folders
structure of the web application. I only add the compiled assembly (dll
file) to the bin folder on the web application (by adding a reference to
the
class library project into my web application project).

So to answer to your questions:
1- A separate class library project compiled into a dll that is copied to
the bin folder of the website
2- Yes
3- No.
4- No.
--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Randy Smith" wrote:
Hi Phillip,
I rally appreciate your help. I like your sample "Dropdownli st within a
GridView", but I do have a few questions about your ObjectDataSourc e.

Here is the code I'm interested in:
<asp:ObjectData Source ID="odsProducts " runat="server"
SelectMethod="P roductByID"
TypeName="WEBSW APP_BLL.Demos"
DataObjectTypeN ame="WEBSWAPP_B LL.clsProduct">
<SelectParamete rs>
<asp:ControlPar ameter
ControlID="ddlP roducts" Name="productID " PropertyName="S electedValue"
Type="String" />
</SelectParameter s>
</asp:ObjectDataS ource>
1) I presume that "WEBSWAPP_B LL" is a DLL, right? Where is it located in
your folder structure?
2) I see that you are using "TypeName". I presume that "Demos" is the
class
inside your "WEBSWAPP_B LL" DLL, right?
3) Did you have to add any specific entries into the web.config file to
get
it to work?
4) I haven't seen your "default.aspx.c s" code, but do you have this
reference: "using WEBSWAPP_BLL;" (C#)?

Many thanks, Randy
"Phillip Williams" <WE******@newsg roups.nospamwro te in message
news:DA******** *************** ***********@mic rosoft.com...
Hello Randy,

You can compile your domain layer into a separate assembly and add a
reference to it in your project (all the demos on my website are build
using
this strategy) or you can also download the "Visual Studio 2005 Web
Application Projects" to build applications in the same way as you used
to
VS2003 where you do not have to put your datamappers in the App_Code
folder
http://msdn2.microsoft.com/en-us/asp.net/aa336618.aspx

--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Randy Smith" wrote:

Hi ALL,
I wonder if anyone has been using n-tier to bind to a GridView control
by
using the ObjectDataSourc e. This is our first OOP web application,
and
we
have no tables. Right now we are simply working with objects in
memory.

So, it appears as though Microsoft requires that our datamapper
classes
reside inside a folder called "App_Code", and NO WHERE ELSE.

So, has anyone successfully been able to place their datamappers in a
location other than "App_Code", and actually retrieve records from a
datamapper class?

TIA, Randy



Jan 13 '07 #6

This thread has been closed and replies have been disabled. Please start a new discussion.

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by: =?Utf-8?B?RGVubmlzIE1jQ2FydGh5?= | last post by:
I am displaying data from a web service in a DataGrid, using an ObjectDataSource. Retrieving and displaying data is working fine, but there is a problem using Edit mode in the GridView. If my GridView contains columns that correspond exactly to the input parameters for the UpdateMethod of the ObjectDataSource, then everything works. ...
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7686
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main...
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7588
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language...
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6272
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then...
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isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes...
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5216
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert...
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3648
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in...
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3630
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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1205
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
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930
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating...

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