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We had a similar problem, It may be of some help to u,
u can create add the common project to ur existing soln and
put it vss. so that when u get the soln to ur local copy
u get both the projects along.
(In our case the no of projects were less so we got away with this)
cool man
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Hi all,
Is this possible to display a windows form from a remotable object?
I need to create a singlecall server application that gives access to an instance of MapPoint ActiveX control to its clients. And I also would like to display a form from the remotable object containing the ActiveX, so I can see the actual maps being retrieved by the remote clients (for debugging purposes).
In a sense I need to create an Automation-enabled app, so that I can interact with it programmatically or via user interface at the same time. Is this possible with .NET remoting?
Thank you for your input.
Alex
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hi there!please help me with this..we get the data from the TSD(test system directory) and these relaymon data have relaycounts. what im doing is i summed up the relaycounts using the pivot table(in excel).after it summed up,the pivoted data shows.the data(relay monitoring data) have their equivalent relaycode, and these were save in another worksheet.what im trying to do is to get that equivalent relaycode in the worksheet where the pivoted datas are.how will i do that?i couldn't used of select case statement because there are thousands of datas in TSD.each day it has thousands of datas saved.so how am i supposed to do that?pls help me..need asap...tnx a lot!
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i want to record clips using a web cam in vb.net code
can any body help me please on this
if possible send me code on this which will be handy
thanx in advance
i am a sr: Software Engg
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 Hi there,
I have been trying to get to read from one DB into a dataset. Then read from the dataset into an XML file and then read from the XML file into a second dataset. Now all of this I got right but the part where I update the DB (a different one to the original) is not working. I am not getting any errors but the table stays empty.
I prosume that the problem is the same as mentioned by Ami but I would appreciate any comments or help regarding this. Below I have included the part of my code that does this.
Kind regards!
Etienne
Dim myAdapter As New SqlClient.SqlDataAdapter
Dim myAdapterLocal As New SqlClient.SqlDataAdapter
Dim objData As New ExtITPOSData.Data
Dim myConnServer As New System.Data.SqlClient.SqlConnection(objData.GetConnectionString)
Dim myConnLocal As New System.Data.SqlClient.SqlConnection(objData.GetLocalConnectionString)
Dim dsServer As New dsSyncronization
Dim dsLocal As New dsSyncronization
'--put data into dataset
myAdapter = New SqlClient.SqlDataAdapter("SELECT VAT, GST FROM Tax", myConnServer)
myAdapter.Fill(dsServer, "Tax")
dsServer.WriteXml("../Tax.xml", XmlWriteMode.DiffGram)
myAdapter = Nothing
dsServer = Nothing
myAdapterLocal = New SqlClient.SqlDataAdapter("SELECT VAT, GST FROM Tax", myConnLocal)
Try
dsLocal.ReadXml("../Tax.xml", XmlReadMode.DiffGram)
Catch FileNotFound As FileNotFoundException
' The XML data must be written before it can be read
MsgBox("No XML file available. View data online and save to offline.", MsgBoxStyle.Critical)
End Try
Dim myCmdBuilder As New SqlClient.SqlCommandBuilder(myAdapterLocal)
myAdapterLocal.InsertCommand = myCmdBuilder.GetInsertCommand
myAdapterLocal.Update(dsLocal, "Tax")
Thanx!
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Cyberclown wrote:
myAdapterLocal.InsertCommand = myCmdBuilder.GetInsertCommand
myAdapterLocal.Update(dsLocal, "Tax")
Have you tried checking what SQL the CommandBuilder generated? All you need to do is either stop the program on the .Update statement and look at the InsertCommand property of use
myAdapterLocal.InsertCommand = myCmdBuilder.GetInsertCommand
Debug.WriteLine("Command Builder generated: " & myAdapterLocal.InsertCommand)
myAdapterLocal.Update(dsLocal, "Tax")
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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can someone help me with this
on my machine
obj.SmtpServer = "mailserver" works and
obj.SmtpServer.Insert(0, "mailserver") returns the CDO.Message
on a server running windows server 2003, its the opposite... this is ticking me off since i need to change the code when i try to make it works, any of you guys have an idea?
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CDO.Message is a class, not an error. I take it your getting the "Could not access 'CDO.Message' object."
Every versoin of CDO I can find defines the SMTPServer field as a String. I can't find a single reference to an Insert method for the SMTPServer field or that the field is defined as a colleciton.
But, I'm not saying your lying or don't know what your talking about. What you might want to try is hitting F2 and navigating down the object browser to find the CDO object and the SMTPServer property. There, you'll be able to see if SMTPServer is defined as a string or a collection.
In either case, you'll have to write code that either attempts to get the CDO Version installed on the machine and sets the field using the appropriate method, OR tries setting the SMTPServer field using one method and if that fails (Try/Catch block) tries the other method.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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thanks i will try the try/catch method since i dont know how to check the version :/ im still a beginner
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I write a codeDom program.
where i add the following statement to the code:
property1.SetStatements.Add(New CodeAssignStatement(New CodeFieldReferenceExpression(New CodeThisReferenceExpression, strFieldVal1), New CodePropertySetValueReferenceExpression))
the run result is:
Set
MyBase.CurDataRow.Item("CusID") = Value
End Set
It miss the "(ByVal Value As String)" statement.
How can I display this statement?
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I need a way to add copy to a listbox when right click is pressed, and using multiple select expanded. TIA
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Has anybody ever noticed that when you right align a column in a datagrid that the last character of the columnheader text is nod displayed properly? I've tried adding spaces at the end of the text but it is trimmed and the same thing is displayed. Anybody know of a workaround?
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Soory - I've had the same problem, and would like a solution too.
Good luck!
Jimbeau
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Hi all,
I have a little problem: by application is generating a report and it takes some time.. so I want to show a little "please wait" always-on-top window while the report is generated.
I created a form with a "Please wait" label and a timer that animates a bitmap every 500 milli. And this is how I call it from my app:
dim frm as new frmWaitMsg
frm.Show
GenerateReport
frm.Close
And it doesn't work! The message form doesn't load properly. I can see the frame, but the CPU doesn't complete the task: the insides of the form are not drawn until the report is complete. So I tried running the report in a seperate thread, but I don't know how to deal with all the yielding problems. I wrote something like:
dim frm as new frmWaitMsg
dim t as new Thread(GenerateReport)
frm.Show
t.Start
t.Join
frm.Close
But then, it looks like the Join blocks my form, and I get the same results
How do I do this?
Thanks,
/=/=/=/= Sagmam =\=\=\=\
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I am having the same problem here. I even tried a fade effect on a timer with the forms opacity to get redraws in a thread and it just draws the frame with a black box inside. Funny enough though, it works perfectly launching from Visual Studio. But it hassles when running standalone.
I use a similar code block to yours, but have also tried at least 5 other approaches.
Any help???
Greg
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I finally solved this thing with a solution that I like. Basically, I use the Observer Design Pattern to create an ObservedThread class.
In VB.NET, I implement this using events. The class has 2 events: Started and Ended.
The class is really simple:
' we can't derive from Thread so we use composition.
' Unfortunately, this means that we have to create the Thread
' interface in this class, but for this example, we'll only
' expose a Start method.
Imports System.Threading
Public Class ObservedThread
Protected Thread As Thread
Protected StartProc As ThreadStart
' some useful events:
Public Event StartedArgs(ByVal Thread As ObservedThread)
Public Event Started()
Public Event EndedArgs(ByVal Thread As ObservedThread)
Public Event Ended()
Public Sub New(ByVal StartProc As ThreadStart)
Me.StartProc = StartProc
Thread = New Thread(AddressOf ThreadProc)
End Sub
Protected Sub ThreadProc()
StartProc()
RaiseEvent EndedArgs(Me)
RaiseEvent Ended()
End Sub
Public Sub Start()
RaiseEvent Started()
RaiseEvent StartedArgs(Me)
Thread.Start()
End Sub
End Class
And let's assume you have an independent form, that you want to appear while the thread executes, and close when the thread finishes. The form has nothing to do with the thread. It's a simple form, that has a timer ticking every few millisecs:
dim frm as New frmPleaseWait
Dim th As New ObservedThread(AddressOf DoSomethingHeavy)
AddHandler th.Started, AddressOf frm.Show
AddHandler th.Ended, AddressOf frm.Close
th.Start()
That's it. Works great.
/=/=/=/= Sagmam =\=\=\=\
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Is this VB6 or VB.net?
In VB6 simply add a doevents to the code
eg
dim frm as new frmWaitMsg
frm.Show
doevents
GenerateReport
frm.Close
I think there is something similar in .net but it is application.doevents
Jon
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Anybody to help connecting a VB6 program to access a database in SQL Server?
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You should use ADO reference or ADO control to connecto your SQL server. The suggest step for you (if you are the beginner), try to connect to database by using a wizard. Then learn from the connection string. If you have some problem to remember the connection string, try to read the information from here.[^]
APO-CEDC
Save Children Norway-Cambodia Office
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Thank you very much sir. I'm a beginner, could you please tell me how to get the ADO wizard? i got some codes(strings) from some books and it doesn't work. it says 'object not found' etc. is it something related to user connection? really i don't know how to do it. please help me.
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first is to create a reference to the ado library. to do this select references from the project menu and tick the 'microsoft ActiveX Data Objects 2.7 Library' box.
The Code to connect to SQL Server and Create a basic recordset is as follows:
dim cn As ADODB.Connection
dim rs as ADODB.Recordset
Set cn = New ADODB.Connection
cn.ConnectionTimeout = 25
cn.CommandTimeout = 120
cn.Provider = "sqloledb"
cn.Properties("Data Source").Value = YourServerName
cn.Properties("Initial Catalog").Value = YourDatabaseName cn.CursorLocation = adUseClient
cn.Properties("Integrated Security").Value = "SSPI" 'If using Windows integrated security
cn.Open
set rs = new ADODB.Recordset
rs.open "Select * from yourTable",cn
You now have a basic recordset
Dont forget to close everyhing and set to nothing when your done.
Sorry if it sounds basic but you did say you are a beginner
Jon
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Dear RamBhatt, an example from jonathan15 is good. Try to do it and learn the process step by step. But according to the code, if you copy and paste it in your project don't forget to add the following two lines at buttom of your code:
rs.Close<br />
Set cn = Nothing
If you still have a problem with this example, let me know I will explain you in another way to help you understand with this issue.
APO-CEDC
Save Children Norway-Cambodia Office
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'Thank you very much sir. it worked as expected. i've some doubts.
'i don't have any ref books at present thatz why i'm putting questions here.
'i chose ActiveX Data Objects 2.5 - is it required to change 'sqloledb' to some other driver?
'in ODBC the setting was SQLServer Authentication, but it still worked, why?
'could you please tell me the difference between RDO and ADO?
to komsot man-sir u told me about wizard whatz it? how to use it? is it something related to 'user connection'?
'the following code, which i got from a book, gave error. could you please tell me why?
the RDODatabase is a class that i got from book. the relevant methods i've pasted down
history
1. when i ran the code as it is it showed 424 object not found
2. when i tried to debug (i don't know much about objects to use class,pls help me) it showed runtime error 40002, data source name not found and no default driver specified. this errmsg was not from my errpara! it was from the class errhandler.
----------------
Dim objDatabase As RDODatabase
'-------my code begins
Public Sub ReadFromStud()
On Error GoTo errPara
'connect to remote DB
'--my code to debug!!
Set objDatabase = New RDODatabase
objDatabase.Connect "ODBCTest", "test", "sa", "sqluser"
'-----
'RDODatabase.Connect "ODBCTest", "test", "sa", "sqluser"
'select query
'RDODatabase.Execute "SELECT * FROM Stud"
Do Until RDODatabase.EOF 'repeat till eof
Debug.Print RDODatabase("idx"), RDODatabase("Name")
RDODatabase.MoveNext
Loop
Exit Sub
errPara:
MsgBox Err & Chr(13) & Err.Description
End Sub
'----my code ends
'the class def is as follows...
'Public Function Connect(Optional strDSN As String, Optional strDatabaseName As String, Optional strUserName As String, Optional strPassword As Variant) As Long
'Call connect to attach to an RDO/ODBC datasource and be happy.
' If ConLiveFlag Then Exit Function
' On Error GoTo Connect_Error
' If strDSN <> "" Then mvarServerName = strDSN
' If strDatabaseName <> "" Then mvarDatabaseName = strDatabaseName
' If strUserName <> "" Then mvarUsername = strUserName
' If Not IsMissing(strPassword) Then mvarPassword = strPassword
' If mvarQueryTimeout = 0 Then mvarQueryTimeout = DEFAULT_QUERYTIMEOUT
' If mvarLoginTimeout = 0 Then mvarLoginTimeout = DEFAULT_LOGINTIMEOUT
'
' If ConLiveFlag Then Call Disconnect
'
' With mvarRDOConnection
' .Connect = ODBCConnectionString
' .LoginTimeout = mvarLoginTimeout
' .CursorDriver = rdUseOdbc
' On Error Resume Next
' .QueryTimeout = mvarQueryTimeout
' On Error GoTo Connect_Error
' .EstablishConnection rdDriverNoPrompt 'open the connection, if named DSN does not exist, ODBC will prompt the user to create one or select a different one
' End With
'
' DoEvents
'
' ConLiveFlag = True
' Connect = 0
'Exit Function
'Connect_Error:
'
' Call HandleError
'
'End Function
'Public Sub Execute(sSQL As String, Optional DatasetType As Variant, Optional Mute As Boolean)
'If the Mute param is True, then no dataset is returned from the server, as in an INSERT query or
'DROP query.
'On Error GoTo Execute_Error
'
' If mvarRDOConnection.rdoQueries.Count Then mvarQueryObject.Close
' Set mvarQueryObject = mvarRDOConnection.CreateQuery(QSQL, sSQL)
' If IsMissing(DatasetType) Then DatasetType = DATASETTYPES.DYNAMIC
'
' 'If we are mute, execute without results
' If Mute Then
' mvarQueryObject.Execute
' Else
' If DatasetType = DATASETTYPES.FORWARD_ONLY Then
' Set mvarRDOResults = mvarQueryObject.OpenResultset(rdOpenForwardOnly, rdConcurReadOnly)
' ElseIf DatasetType = DATASETTYPES.DYNAMIC Then
' Set mvarRDOResults = mvarQueryObject.OpenResultset(rdOpenKeyset, rdConcurRowVer)
' End If
' DoEvents
' boolResultsAvailable = True
' End If
'
'Exit Sub
'
'Execute_Error:
'
' Call HandleError
'
'End Sub
'-------------------
'Public Sub MoveNext()
'On Error GoTo MoveNext_Error
' mvarRDOResults.MoveNext
'Exit Sub
'MoveNext_Error:
' Call HandleError
'End Sub
'Private Sub GenDatabaseError()
' Dim MSG As String
' MSG = Err.Description + "|"
'
' For Each DataErr In rdoErrors
' MSG = MSG + "[" & DataErr.Number & "]" & DataErr.Description & Chr(13)
' Next DataErr
'
' lErrorNumber = Err.Number
' sErrorMessage = MSG
'
' Err.Raise lErrorNumber, ERROR_SOURCE, sErrorMessage
'End Sub
'Private Sub HandleError()
' Dim lErrNum As Long
' Dim sErrMsg As String
' lErrNum = Err.Number
' sErrMsg = Err.Description
' If lErrNum = 40002 Then
' Call GenDatabaseError
' Else
' Err.Raise lErrNum, ERROR_SOURCE, sErrMsg
' End If
'End Sub
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I can answer for you for only question that I know and base on documentation.
1. Difference between RDO and ADO.
RDO stand for Remote Data Objects
Remote Data Objects implement a set of objects to deal with the special requirements of remote data access. RDO implements a thin code layer over the ODBC API and driver manager that establishes connections, creates result sets and cursors, and executes complex procedures using minimal workstation resources. Although RDO is also accessed by DAO when your code creates an ODBCDirect Workspace object, documentation for this implementation can be found by searching for specific ODBCDirect topics.
Note RDO and the RemoteData control are designed to be used only in 32-bit operating systems such as Microsoft Windows 95 (or later) or Microsoft Windows NT.
With RDO and the RemoteData control, your applications can access ODBC data sources without using a local query processor. This can mean significantly higher performance and more flexibility when accessing remote database engines.
By using RDO, you can:
Create simple cursorless result sets, or more complex cursors.
Run queries and process any number of result sets.
Execute stored procedures that return result sets with or without output parameters and return values.
Execute action queries that perform data manipulation or data definition operations.
Limit the number of rows returned or processed.
Monitor all of the messages and errors generated by the remote data source without compromising the executing query.
Enable synchronous, asynchronous, or event-driven asynchronous processing so your application isn't blocked while lengthy queries are executed or the current row pointer is repositioned.
ADO stand for ActiveX Data Object
Solutions for Local Data Access
The Issue
You want a simple, consistent application programming interface (API) that enables applications to gain access to, and modify a wide variety of data sources. A data source may be as simple as a text file, as complex as a cluster of different types of databases, or something yet to be invented. Furthermore, the API should not presume the means of gaining access to and manipulating the data source.
Although these are your specific requirements, the typical data source is a relational database that supports the Open Database Connectivity (ODBC) standard and is manipulated with commands written in Structured Query Language (SQL).
The general solution Microsoft offers to this problem is OLE DB, a set of Component Object Model (COM) interfaces that provide uniform access to data stored in diverse information sources. However, because the OLE DB application programming interface is designed to provide optimal functionality in a wide variety of applications; it does not meet the requirement for simplicity.
You need an API that is a bridge between the application and OLE DB. ActiveX Data Objects (ADO) is that bridge.
The Solution
ADO defines a programming model—the sequence of activities necessary to gain access to and update a data source. The programming model summarizes the entire functionality of ADO.
The programming model suggests an object model—the set of objects that correspond to and implement the programming model. Objects possess methods—which perform some operation on data—and properties—which either represent some attribute of the data or control the behavior of some object method.
Associated with objects are events—which are notifications that some operation has occurred, or is about to occur.
Basic ADO Programming Model
ADO provides the means for you to perform the following sequence of actions:
Connect to a data source. Optionally, you can ensure that all changes to the data source occur either successfully or not at all.
Specify a command to gain access to the data source, optionally with variable parameters, or optionally optimized for performance.
Execute the command.
If the command causes data to be returned in the form of rows in a table, store the rows in a cache that you can easily examine, manipulate, or change.
If appropriate, update the data source with changes from the cache of rows.
Provide a general means to detect errors (usually as a result of making a connection or executing a command).
Typically, you will employ all these steps in the programming model. However, it is worth noting that ADO is flexible enough that you can do useful work by executing just part of the model. For example, you could store data from a file directly into a cache of rows, then use ADO resources solely to examine the data.
(The source of this document were took from MSDN Library January 2000)
2. About the wizard
It look like the wizard but it just 2 importance step that you need to understand, first select the connection type and second choose the database. To understand this follow this step:
1. Create a new blank project in vb6.
2. Go to Project menu and click on Component submenu.
3. When the Component dialog box appear scroll to Microsoft ADO Data Control 6.0 (OLEDB) and checked it.
4. An ADO data control appear on the tool box and click and draw it on your form.
5. When an ADO data control appear on the form right click on it and choose ADODC Property.
6. From the property dialog box of ADO data control in the "Source of Connection" frame you will see three option. The first one is "Use Data Link file" the second one is "Use ODBC data source name" and the third one is "Use connection string".
7. Choose the third option (Use connection string) and click the build button.
8. You will see the Data Link Property dialog box appear with a difference type of data that you want to connect. If you want to connect to SQL server database you can click on "Microsoft OLE DB Provider for SQL Server" and click on "Next >>" button. The next tab of property dialog box appear with 3 step for you to follow. The first one is "Select or enter the server name:" click on the drop down list to choose the server name that contain SQL database install on it. The second step is "Enter information to log on server", you can choose two option (SQL or Windows authenication). This example I prefer Windows authenication. And the third step is select database on the server. I choose master database (just an example, master database is the core database of SQL server. You should not modified to it in case of necessary). Then click on "Test connection" button. If you see message box said that "Test connection successed." then it is working properly.
9. Click on OK button twice and you will see the connection string in the text box "Provider=SQLOLEDB.1;Integrated Security=SSPI; Persist Security Info=False;Initial Catalog=master;Data Source=APOCEDC".
Learn from here try to customize the code with any database that you create in SQL server. Then you will see how it is working.
Hope it is work!!! and wish you good luck in programming!!! ![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif) 
APO-CEDC
Save Children Norway-Cambodia Office
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