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Hi Dave, i am glad for your interesting.
The application was builded in VB .NET (smart client arquitecture) and i have some problems with performance when the client is running in remote locations (net bandwitdh 512kbs).
I already ready patterns and praticles and i thing that is very generics and i can not solve the problem.
However, if can help with some tick out trip i will very thankfully.
The problem consist in the net traffic (lazy response in fact). Exemple: one simple (a single form with a button, a textbox and one label) form take 30 seconds every time it is called.
Sorry about my bad english, i can explain again if necessary.
thanks a lot.
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You haven't supplied any information as to what your form is doing. All I know is that your form takes 30 seconds to show up. Is this because your running your application from a remote location and downloading from the network somewhere? Is it because your code is doing somethin with the network? What is this app supposed to do?
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Dave, this is my actually scennary:
I have a database and a components server in my local server. Internal clients can access this component server at 10 mb local network. In this case, the performance of my clients is excellent.
This is the problem scennary:
I have remote clients running this application and accessing this component server through a WAN at 512kb (ADSL) and the performance is very slow.
To try fix this problem a have builded a simple test application (File-New) and set a button, textbox and a label into this (nothing was codified) and try to execute this app in my remote clients, and the performance keep very slow.
The test app in most simple that is possible, running in a remote client.
I hope that you have understanding the problem.
tanxs
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It's not much clearer, but I'll take a stab at it. Your client is instantiating a remote COM server object across a 512Kb link and getting very slow performance. Your more than likely not getting 512Kb permance on that link anyway, more like half that...
Unfortunately, I don't think there is anything you can do about it, short of redesigning your server component and not use remoting. A WebService would probably give your better performance, but the feasibility of that depends on your application.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Dave, let's start from begining.
Can you have some problem with client developed in VB. Net (smart client) arquitecture running in remote locations ?
Exist some trick configuration in the framework or IIS to make this client more smart ?
Can i make a faster remote client app (VB .NET) acessing a local web service ?
My app is based in .Net 3-tiers arquitecture and i not use COM+ components.
tanks
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I'm affraid without much greater detail in what your app is doing, like HOW your client app is communicating with the server, what it's doing, ... there's nothing we can do to help you.
Marcus Travaglia wrote:
Can you have some problem with client developed in VB. Net (smart client) arquitecture running in remote locations ?
Silly question. Of course you can have problems. What those problems are is a another issue.
Marcus Travaglia wrote:
Exist some trick configuration in the framework or IIS to make this client more smart ?
More smart? What does that mean?
Marcus Travaglia wrote:
Can i make a faster remote client app (VB .NET) acessing a local web service ?
Sure. But that would involve running a web server on the local machine also. What would this WebService DO? What is its purpose? It doesn't make any sense what-so-ever to run a WebService locally on the client machine...
Look. Your not telling us anything about what your app is doing. What are you doing acrossed this connection? I'm just guessing because your not giving anywhere near the detail we need to troubleshoot your problem. There are many different ways of passing data nad objects acrossed a 3-teir platform. Samples of your code would help greatly!
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Ok, I have tried everything there is and I cannot get data to Merge into a DataSet. I have done this before, but now I am having problems with this particular piece of code. Here is the Error:
Constraint Exception:
System.Data.ConstraintException: Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.
at System.Data.DataSet.FailedEnableConstraints()
at System.Data.DataSet.EnableConstraints()
at System.Data.DataSet.set_EnforceConstraints(Boolean value)
at System.Data.Merger.MergeDataSet(DataSet source)
at System.Data.DataSet.Merge(DataSet dataSet, Boolean preserveChanges, MissingSchemaAction missingSchemaAction)
at...
The DataSet is retrieved from the DB the first time fine. The DataSet contains 4 DataTables as well as some DataRelations. The 2nd time around, when I am trying to refresh the Data from the DB (but Preserve my changes) I get the above Error.
It is absolutely impossible, beyond any doubt, that there are "NULL" values in any Primary Keys or F-Keys used within the DataRelations. What can be causing this? 
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It's probably not a NULL value error, but your resulting dataset is violating the key constraints somehow. Possibly two records having the same key? That leads to another question...When you refresh the data, are you sure you're not appending a new copy of the data to the old version of the dataset?
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Well, I figured this one out. Since I was retrieving data from Views, it wasn't able to determine the P-Keys on its own. I modified the Tables after data retrieval to have the Proper Key Columns on them. Afterwards, it worked great! So I guess in a sense, it was trying to append the same Records twice, and since I had Relationships setup, it was violating the Constraints. 
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I am trying to convert a VB6 project to a VB.net. My problem is that I am using an ActiveX control for charting and need to pass it an array of double. The following is an example that works well with C++ and VB6. But I need to find the dot net version of this.
C++ ActiveX function:
Short myfunction(double * data)
{
do something with data
}
VB6 function:
Dim data() as double
Dim retval as short
retval =Controlname.myfunction(data(0))
This code worked fine for VB6 to pass an array of doubles. But in VB.net only the first value in the array is passed and all the other values seem to be ignored.
If you have any suggestions I would appreciate it.
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change
retval =Controlname.myfunction(data(0))
to
retval =Controlname.myfunction(data)
You are passing only first element
Sanjay Sansanwal
www.sansanwal.com
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URL: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/csref/html/vclrfusingforeachwithcollections.asp
Hi! I have created a class library in C# using IEnumerable
interface as specified in above URL, Example 2.
Now, I am iterating the items from Visual basic but it is giving
error like Object does not support this property or method while
it works fine with .net. As mentioned in URL, it should work with
the VB also.
What can be the problem?
C# code is same as in URL, Example 2.
Here is the VB code:
Dim col As New MyCollection
Dim i As Object
For Each i In col
MsgBox (i)
Next
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Dim i As Object ?
what's the reason you dim i As Object?
Dim col As MyCollection = New MyCollection ()
For Each i As Integer In col
MsgBox(i)
Next
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Hi, I am going to take MCP exam 70-306.
Is there any e-books can be downloaded ?
What sources would be useful ?
Thanks,
NUrmat
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I used the Osborne Certification Press MCAD/MCSD Book for 70-306. It helped a lot for the test and I passed with flying colors. 
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I also take MCP course too, but about windows 2000 networking. I think the best resource is Microsoft document. Try to read Microsoft press book, it contain a lot of document for people to prepare for an exam. Give you e-mail address, I will send an e-book to you. There 5 file which contain 8Mb. But each file is 2Mb max.
APO-CEDC
Save Children Norway-Cambodia Office
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Go to
www.examcram2.com
Download books for 30 days trial.
Sanjay Sansanwal
www.sansanwal.com
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Can anyone help me to add an icon on a menu item???
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Try to read the information from here[^] and here.[^] 
APO-CEDC
Save Children Norway-Cambodia Office
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Hi,
How do I link a database file .mdb to a flexgrid so that all the records in the database show up in the grid.
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You can't. Learn how to use ADO. MSFlexGridis not a "data aware" control, so you have to program everything manually.
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Thanks for your reply.
All that I want to do is to populate a grid with items from a database. I do not need to retrive items for reports.
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Try to read the information from here.[^]
APO-CEDC
Save Children Norway-Cambodia Office
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tnx a lot! one more pls..can i have sample source code on how to select the data in the database to excel using sql(or another software)?coz the codes that im doing aren't working.in excel,im using macro and pivot table to sum up all the datas automatically.but then,when it generates only the pivoted datas are there.the problem is,to get the equivalent relaycode of the relay monitoring data from database wherein the equivalent data will be put in the sheet where the pivoted datas are.Please..it was badly needed..thanks a lot!!!tc
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Hi,
I am a vb.net beginner from another country. So my english speaking is too bad.
My company is doing a project about RSA encryption in VB.net. I know a basic using about RSACryptoServiceProvider class. But i can only to use the random Public key and Private Key by RSA Object in VB.
For example,I already have a pair of keys(private key and public key).That keys are related(The keys were generate by another program).
Now I want to use my public key to encrypt my String and use my private key to decrypt my String. But I don't know how to import my key to RSA Object(Use FromXmlString/ToXmlString).
Please Help Me.(My english is too bad. Please use a simple english)
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