Updated Table Loses Saved Data After Project Rebuild
Mar 17, 2009
since I still use VB6 and the code is in VB8, I can't find the solution.The sub below is executed in a button's click event, and is supposed to save data to his database. It seems to work fine : you can add persons (in a separate form), and see them appear in the datagrid. You can stop the program, go back to the VB editor, and run it again (without rebuild), and the previously added persons will still be visible in the datagrid. But...If you add some persons, then go to the editor and force a rebuild (for example by adding more code), and than run the code again, the the previously added persons are gone (nomore visible in datagrid)!To me, it seems that the problem is to effectively update the database. I have searched on the internet about this topic, and I read that you must "set" the UpdateCommand.
[Code]....
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Aug 10, 2011
At the moment, I'm writing tons of custom control, which all fits my needs. But the thing is, each time I Debug the project, it doesn't update the form designer at all, not even the code. My solution to this is to Rebuild the project, which can take time. This is very frustrating.
I'm using Microsoft Visual Studio 2010 Ultimate to compile.
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Sep 28, 2009
I would like to know the best, or standard, way to accomplish real-time client updates in a small multi-user application using an access data table as a data source.Specifically, this application will be used by 3-4 people. It uses a datatable which is filled on form load and bound to a datagrid at design time. The datatable is stored on a shared drive. The data table on the shared drive is updated in two ways:
1) Users can update the datagrid which then updates the datatable on the shared drive via the data adapter's Update method.
2) A server application does some work on some text files, periodically updating the data table.
I need the clients to reflect the changes to the data table on the shared drive as closely to real-time as possible. I know that the data table stored in memory on the client is disconnected from the data table on the shared drive, so I must query again to get the updates.
1) Is there an alternvative model I can use which is connected, and which will automatically reflect the updates in the data table on the shared drive?
2) If not, what is the best way to check for changes in the data table (so I can know when to call the data adapter fill method)? I am planning to poll the drive for a change to the .mdb file, raise an event and then fill the data adapter when the event is triggered. I am using this method successfully now to check for changes to a text file in another application, and I know how to implement it?
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Sep 28, 2009
I would like to know the best, or standard, way to accomplish real-time client updates in a small multi-user application using an access data table as a data source.
Specifically, this application will be used by 3-4 people. It uses a datatable which is filled on form load and bound to a datagrid at design time. The datatable is stored on a shared drive. The data table on the shared drive is updated in two ways:
1) Users can update the datagrid which then updates the datatable on the shared drive via the data adapter's Update method.
2) A server application does some work on some text files, periodically updating the data table.
I need the clients to reflect the changes to the data table on the shared drive as closely to real-time as possible. I know that the data table stored in memory on the client is disconnected from the data table on the shared drive, so I must query again to get the updates.
I have two questions:
1) Is there an alternvative model I can use which is connected, and which will automatically reflect the updates in the data table on the shared drive?
2) If not, what is the best way to check for changes in the data table (so I can know when to call the data adapter fill method)? I am planning to poll the drive for a change to the .mdb file, raise an event and then fill the data adapter when the event is triggered. I am using this method successfully now to check for changes to a text file in another application, and I know how to implement it
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Oct 13, 2011
I am getting an incorrect repsonse after an update to a table. In my RowUpdating event I have the following code which builds an Update Parameter to call an SP to update a table. I must be doing something wrong but everything runs fine. My rowsAffected variable reports 1 after the update, but the table never gets the data.[code]I found a solution that is working. On the original DataSource for the update command I needed to add the following.[code]This in essence allows the original data source to call the SP. Note: that the command type needs to stay as TEXT not Stored Procedure as one might think.
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Mar 3, 2009
I have an add-in that does operations to open projects in the current solution. Before I do any of those operation, I want to verify if I need to build the projects or now. Is there a way I can check if a project is out of date (Up-To-Date = True)?
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Mar 4, 2011
I recently inherited a VB project for some maintenance. I've been making changes and testing in VS2008 using F5. It's been going well.I did a rebuild all and now it won't run. It displays a dialog saying something like "MSACAL.dll or some of its dependencies are missing." There are a number of INTEROP.....dll files in ..obj (I didn't look in ..in and am home for the weekend) but none in ..objDebug.
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Jul 1, 2009
part of my code is in below
[Code]...
I would expect to see the path.Path include the new record, however, I also notice that tempnextgen also include the new record. Can anyone help me out on this issue? Why the tempnextgen got updated as well, how to prevent this unexpected operation?
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Aug 6, 2009
When I make a change to a usercontrol, I get a warning message "You must rebuild your project for the changes to {class} to show up in any open designers."Is there a studio environment setting that will prevent me from ever seeing that message again? The Error List window popping up and stealing focus is really getting on my nerves, and sometimes it doesn't want to automatically re-hide.
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Mar 15, 2012
[Code]...
The table is not getting updated.
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Dec 14, 2009
I am trying to update a table using LinQ. Though records are getting inserted, for some reason they are not getting updated.what can be possible problem
Dim db as new empDataContext
Dim emptable as new employee
if update then[code].....
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Mar 20, 2010
Let's say I roll out version 1 of this project for many users. As time goes by I update the code, change the Access db strucutre here and there, and would like to roll out version 2.What is the best way to do this?Is there an easy way to get the differences between version 1 and version 2 of an access db?
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Nov 6, 2011
I'm trying to access 2 tables within the same DB in Access 2007, but I have a problem when saving information to one of the tables, I can do it with one table but when I try to save the information to the second table the data gets overwritten, not sure why, because I use the same procedure for both of them, just changing the variables to avoid mixed data, this is the code that I use to connect with the DB and fill the DataSet:
Try
dbProvider = "PROVIDER=Microsoft.ACE.OLEDB.12.0;"
dbSource = "Data Source=.\Almacen.accdb;Jet OleDB:Database Password=Slackware"
[code].....
Again, it works fine when saving info to one table, but using the exact same procedure (with different variables) saves the new data but overwrites the previous information
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Aug 25, 2005
I downloaded a sample Project from the web. I opened the sample Project in Visual Basic 2005 Express Beta 2. After making a lot of modifications to the sample Project, I wanted to save my new project with its own different name, and in the usual directory where I have been creating other projects. I pressed Save All and accepted the default choice. Unfortunately, after pressing OK, I realized that I had saved over the original downloaded sample project, and had saved my modified project in a temp directory designed to receive downloads from the web.It's not a problem that I overwrote the original sample project, because I have already retrieved a new fresh copy from the web. Nor is it a problem that I gave it the name of the original project, because I was able to figure out how to rename the modified project by right-clicking in the Solution Explorer.
My problem is that I didn't want to save my modified project in the download temp directory. I want to save the Project (and all its associated sub-directories and files) in a directory of my own choosing (the same directory in which all my other created projects are saved). But now that I have chosen to save the project in an undesirable location, I want to re-save it somewhere else.For the life of me I can't see how to do this. The Save All command doesn't give me the choice of selecting the name or location for my project, it just updates my currently undesired location. The other two save-oriented commands under the File menu selection (Save and Save As) seem to be oriented to just saving the singular item (form code, dialog box code, module, etc) on which I am currently working. I can't find anything such as a "Save Project As" kind of command. And I don't want to try to cut and paste the whole directory, because I'm too novice to know whether I am moving everything properly with regards to what VB2005 needs to find and where it needs to find it.
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Apr 22, 2010
I have a created a user control. This user control I dynamically load on a page inside Telerik Panelbar control. I have done all necessary coding to save the viewstate and load this dynamically created usercontrol every time page loads.On this User control I have a asp panel. By default this panel is invisible. When user clicks a button on this user control panel is made visible. On page load of this user control I populate all the controls on this panel.Everything works fine if I dont load this use control dynamically but when I load this user control dynamically and if I make panel visible by default then only all fields on the panel are populated. But if I make by default invisible and on button click make panel visible none of the text boxes or comboboxes are populated. I populate comboboxes on page load of the userControl but inbetween postbacks all the comboboxes on the user control loose data.[code]...
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Jun 26, 2009
I want to update a date field in my table when a record is updated to reflect when the last update was made. I have this for the parameter: objEXTCommand.Parameters.AddWithValue("@entryDate", Now.Date)
However, this inserts the Date and a time of "12:00:00". I want the date and current system time. I've gone about several ways, but none seem to work. I try this: [Code]
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Mar 18, 2006
I have created a new icon using VB.NET and have saved it to the project directory. I then set the icon property for a form to point to my new icon file. The new icon shows up in the properties window but when the program runs, the title bar displays the default icon that you get when starting a new icon file rather than my new icon.
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May 12, 2011
I have a project I wrote a while ago and saved it on a flash drive. I now have a laptop and wish to save it, and use from the laptop. How do I do that ?
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Apr 30, 2012
am currently having a problem saving any changes i make in my form here is my codes for each button: -Private Sub btnUpdateExistingRecord_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdateExistingRecord.Click 'This code makes sure that all fields in the members table are updated when the button is pressed. This is needed so 'the changes in the Members table are saved currectly in the database.
Dim CommandBuilder As New OleDb.OleDbCommandBuilder(DataAdapte
DataSet.Tables("Members").Rows(Include).Item(0) = txtMemberID.Text
DataSet.Tables("Members").Rows(Include).Item(1) = txtFirstName.Text[code]......
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Jul 6, 2009
When I am building a VB.NET project, it shows me this error:"The target "Rebuild" does not exist in the project.". I have never come across such problem. By the way, since I'm moving some projects from VS2008 to VS2010, I found in this project many references shows "System can't find the reference specifiled". In a mixed C++/CLI project, when I'm trying to add a reference, VS even shows a dialog telling that "Reference *** was not found on the reference search path.
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Jun 2, 2010
What I am trying tot achieve is the following:User inputs data in one form that saves to the dataset table no problems. On an edit screen I want the current data saved to appear in this page within all the relevant fields but when saving I want this data to add to the dataset table as an additional line of data so the transaction records are kept.I want to add a new datarow regardless of it saving one change or all 7 changes that are possble.
e.g. Line 1 - user inputs 7 cells of data Line 2 - user amends 2 cells of data Line 3 - user amends 1 cell of data an so on. Unfortunately the terminology for certain items above may not be correct as I am still new to this programming and still on a massive learning curve.At the moment I do not have the code for what I am trying to achieve as I really dont know where to start with it.I am currently able to save the data and have it appear in the "edit" panel however only the cells changed are saved an it overwirtes the initial input.
[code]...
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Feb 4, 2009
I got a problem in showing report. The system flows like below -Systems insert records in CSV file into a table,A in ms access database by batch.Systems update in another table, B, based on these inserted records.
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Oct 13, 2010
Bindingsource.position/current. after data been updated
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Feb 28, 2012
What I have managed to do is currently display a chart with 3 bars on it linked to textboxes what have numerical values in them when the form is loaded. i.e TextBox1 has an initial value set in it's properties of 10, TextBox2 has a value of 20, TextBox3 has a value of 30.
When I run the program the graph displays these values correctly.
I have also got a button, Button1 which when pressed will plot the chart again, (so if I manually change the values in the TextBoxes after the form has loaded), it will display the new values via the bars.
The problem I have is that if if once the initial values have been plotted when the form loads, i.e. 10, 20 & 30, the Y axis of the chart has a maximum value of 35, so that all the initial values for the bars are shown. But if I change the values to say 15, 30, 80. and then press Button1 to update that bars to thier new values, the bars change but the one that show's 80 can not been seen fully as it goes off the chart, as the Y axis still only shows a maximum value of 35!
Does anyone know how to get the chart to resize to be able to display all the bar values within the chart each time the values are changed and the Button1 is pressed, whether it be reducing the graph for smaller values or enlarging the chart for higher values?
I am not 100% sure I am going about it in the correct way as I have not got any experience in using charts and am having to stuble about the net trying to find basic example code of how to setup and use a chart
My code so far is:
Imports System.Windows.Forms.DataVisualization.Charting
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
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Mar 4, 2009
I have a project where I have data in the my.settings part of the project. When I compile the project and run it on an XP machine, a Vista machine, and a Windows 7 beta machine, the data is not getting updated. In fact I can't even find the .config file that should be created when my application runs. The code I am using to update the data is this:my.settings.properties. item ("Agent").defaultValue = "Andy"my.settings.save()my.settings.reload()What do I need to do to get the changes to be saved?
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Oct 10, 2010
i try to update the table but not sucessful. In access database the following fields with datatype as under;
Parameters=text
Value=Number
Units=text
[code].....
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Dec 28, 2010
[Code]...
I have the following records in the table student(see in fig 1). I am trying to update the Name of student whose Roll no =1. But Record is not updated in the database,
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Mar 9, 2012
I have an issue with a data table that I have updated using the datatable.update command.The datatable is bound to the datagridview using dgv.datasource = datatable.I have used INSERT and UPDATE commands and the INSERT command writes the data back to the database ok. However my problem is that it the dgv is not updated with the primary key (ID field) from the database. So when I save a second time, instead of updating it just inserts the data again.
[Code]...
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Jun 8, 2012
I have two tables:
table1
case_no flow result
tc_1 001 pass
tc_1 002 pass
tc_1 003 pass
tc_2 001 pass
tc_2 002 fail
tc_2 003 pass
table2"
case_no result
tc_1 pass
tc_2 fail
Table2 should be updates from table based on the results... If all results is PASS then the table2 should be updated as pass... if any result is FAIL then the entire case_no should be updates a s fail..
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Dec 9, 2010
how to get the updated database data and print into crystal report using VB.net?
Dim rpt As New CrystalReport1()
Dim myConnection As SqlConnection
Dim MyCommand As New SqlCommand()
[Code].....
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