When using the codeTryMe.Validate()Me.CustomersBindingSource.EndEdit()Me.CustomersTableAdapter.Update(Me.NorthwindDataSet.Customers)MsgBox("Update successful")Catch ex As Exception MsgBox("Update failed")End Try in the walkthrough given in http://msdn2.microsoft.com/en-us/library/0f92s97z.aspx, changes were not saved to the NORTHWND.MDF file in the project folder or bin folder (not updated).
View 1 RepliesHow to take backup of database from sql server2005 using vb.net with the help of code
View 1 Repliesi have encountered this error Variable 'dsNewRow' is used before it has been assigned a value. A null reference exception could result at runtime when i click on the button to insert data into my ms access database.
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I'm trying to create a simple Data Grid that will automatically save changes. So far I have a data grid connected to a MS Access 2007 Database that reads the data. I can create new fields in the Data Grid, but I need to program to save the data automatically to the database on update (or on close).
View 6 RepliesI'm working on a project which are generating some data from my VB.NET software and I wish to save those data into sql server. But my concerns is the speed of saving and the large amount of data. For every 0.5s, one set of data will be generated and the process will keep running for about 8 hours, so at the end of 8 hours, roughly there will be 60,000 set of data generated.May i know what is the best option/method of saving the data into the sql server in not hanging up my software and also keeping the pace with the speed of 0.5s data being generated?
- Speed of 0.5s. I have to maintained for every 0.5s, one data must be generated. Cannot delay too much.
- I can afford delay in the sql database, meant the data might not be necessary close to real time.
I am making a simple program in Visual Studio 2010.My program connects to a MySQL 5.5.8 database running on my computer through XXAMP. I have used the Connector/Net 6.3.7 for MySQL to allow me to do this.
This is the local information for the MySQL server:
Server: 127.0.0.1
Port: 3306 (default)
Username: root
Password: admin
I have successfully created a Data Source for this server. The DataSet is called 'testdbDataSet'.
This is what my program looks like:I do not want to use the navigation bar that Visual Studio gives me at the top. Instead, I want to use the buttons shown below the input fields. The btnAdd button I believe should clear the two fields. It is currently working fine. I want the btnSave button to save the stored values of the two input fields to the database. I do not know how to do this.
this is roughly the add form where i have created... i am suppose to send this information into the database that i am using which is mysql.It is suppose to grab the incident date and the Type and also a count that increases by 1 if the date is the same or else it will be back to one.
This is the code
Dim count As Integer
Dim hotelcode As Integer
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I am trying to make a program (kinda like a game, but no graphics). Well, everything on that is fine, and ive made this program once before in VB6, but that code is long gone and I am trying to make it again. Well, here is my issue. I want the users to be able to create items on the server end (as well as maps, npcs so on and so forth) and I was wondering if there is a way to do this without using a database? In VB6 I used several ini files, but this is not a recommended way of doing things anymore. I dont want each person that uses this to have to install SqlServer on their computer either.
View 4 RepliesIn my form i have a datagrid view and two textbox the textbox is bind with the datagrid..now when i click the data in the datagrid the data will go to the textbox (that's i want to happen) but when i click the update button and check my database it doesn't change.. i use ExecuteNonQuery to update my data.[code]...
View 11 RepliesI've been struggling the entire day trying to figure this out. Basically the data in my form won't save to the tableAdapter. To update the database I use:
Me.dataSetName.TableName.Rows.Add (DataRowName)
Me.tableAdapterName.Update(Me.dataSetName.TableName)
The database was created using SSMS 2008 R2 and I'm using VS 2010.
I have confirmed that the data is being stored in the data row (because when I removed data from the data row it wouldn't accept because there are NOT NULL columns) and I have followed the instructions of this form as well:[URl]..
i am getting a error went i update or save a record to my database.
View 3 Repliesthis code worked in every form except this form which I named Reregistration the code is working and every thing but the only problem is that the new generated data is not saved in the actual table
Private Sub btnRegister_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRegister.Click
If txtPassword1.Text = txtPassword2.Text Then
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I wish to save some data but dont want to use database. I have studies that XML files can be used for that. But I have no idea abut XML.
What is the difference between using XML and database?
I am saving the bulk data to the database using xml format from vb.net windows application this is the procedure
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i found that the error is comming because of passing "F&I" value in the parameter value if i pass only "FI" i am not getting error means the error comming because of passing "&" in the parameter value so if i want to save the values like "F&I" how can i save into the database using xml
I have an xbap application that connects to a webservice to run different stored procedure. The webmethod loads the data into a data table and returns it to my xbap application. My program gives the user the option to manipulate the data. What is the best option for saving the data back to the database?
View 6 Repliescan anyone write a step by step tutorial on saving data on database (sql if possible)? i have already created a form without any functions, i also created a access file with table and queries equivalent to each txtbox and combobox(if that is needed incase)
the names of txtbox and combobox are(cbWhat, dtpDate, dtpFrom, dtpTo, cbWhere, cbCName, mtxtCN, txtLoc and txtEventDes).
I have a string with Binarydata that is 64bit. I want to store this data into SQlServer database and the column is varbinary(Max).When I pass the string I am getting an error saying string cannot be converted into varbinary.
View 1 RepliesI've been looking at this problem for a while and can't see what I'm doing wrong. I need an extra set of eyes. The business problem that I am trying to solve is the following:I have a table that contains a list of auction items that are displayed in a datagridview. I have another table that has a list of bidders. At the end of the auction I need to update the Winners table with the bidder number and item number of the auction item. To do this, I display all of the auction items and then let the user enter the bidder number and winning bid amount in the datagridview. When finished, the user clicks on Save and the information is pulled from the datagridview and saved in the Winners table.
I have a datagridview (AuctionItemsDataGridView) that uses the auctionitems table from my database as its source. I add the BidderNo, WinningBid and BidderName columns to the datagridview when the form is loaded. There are 3 types of auction items so I prompt the user for the type of auction items to display using a combotextbox (CategoryComboBox). When an auction category is chosen, I load the auction items for that code into the datagridview. I then load the winners from the winners table into a WinnersDataTable (WinnersDT). For each item in the datagridview, I check if there is a corresponding item in the Winners Table. If there is then I populate the BidderNo and WinningBid columns of the datagridview (I also populate the BidderName). So far all of this works. The problem is when I make a change to the datagridview.If I enter a bidder number and winnng bid amount the data is not being saved to the physical database table. To save the data I perform the following:
For each item in the datagridview, check if a Bidder Number is entered. If a bidder has been entered, I check to see if there is a corresponding winners record in the WinnersDataTable for the current item. If yes, I enter the bidder number and winnng bid amount in the table. If there isn't a record, I add a new one. After looking at each item I call the Update method on the WinnersDataTable.
Public Class Winners
Dim BidderDT As DataTable
Dim WinnersDT As DataTable
Dim pageLoading As Boolean
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I have created a access database and have sucsessfully connected to it.I have three records in it (just for testing) and have got the BindingNavigator to connect to it as well.I can move through the (3) records that I have previously entered, and when I click on the Add Record button it zero's the text fields that I have displayed.When I enter NEW DATA it does not SAVE it.
View 7 Repliesam pretty new to VB and i am slowly teaching myself .I am working on a project at the moment which will write to an access database. I have created the database with contains about 40 fields. i Have a form which the user inputs the data into whose controls are bound to the corresponding fields in the database . I have been reading up on what a could but the more i read the more lost i am getting.
View 1 Repliesrewriting a class I use for saving Treeview data to a XML file for use of saving ListView data I can't really figure out the rewrite, I'm stucked, unfortunately Listviews seems to be a big problem for me in general.
Option Strict On
''' <summary>
''' The TreeViewDataAccess class allows the nodes within a TreeView to be
''' persisted to xml for later retrevial.
''' </summary>
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I am developing a program that will contain a TabControl on a form. The TabControl will have multiple TabPages that will represent forms used in the mental health field by clinicians. What I have done so far is created a SQL Express 2005 database that contains a table for each TabPage. To start off, I am working with only 2 tables to see if I can make this work. The tables are called EvalPage1 and EvalPage2. Each table includes a field called ClientID which I have named Key Indexes. I am also using these fields to create a relationship: EvalPage1.ClientID (Parent) and EvalPage2.ClientID (Child)
The problem That I am encountering is when I use the BindingNavigator to enter and save a record, it only works for EvalPage1 and not for EvalPage 2. Here is the code that I am using:
Public Class MainForm
Private Sub EvalPage1BindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles EvalPage1BindingNavigatorSaveItem.Click
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Private Sub Table1BindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Table1BindingNavigatorSaveItem.Click
Dim dg As DialogResult = MessageBox.Show("Would you like to continue saving your changes?", "Save Changes?", MessageBoxButtons.YesNo)
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How to make a progress bar base on saving data in database ? Lets say I'm going to save 10 datas so i want to make a progress bar base on saving on that 10 datas ?
View 5 RepliesI have a rich text box in one of my applications (WPF). Now I want to store the data of the rich text box along with its formatting (e.g. bold, colored etc.) into a database (SQL Server). Currently I am storing the whole XAML of the text box in a database field. however, I am not sure whether this is the right approach.
View 2 RepliesI am trying to Save my data into Local Database (*.SDF or *.MDF) but i due to some reasons i can not do it. I have seen 100s of Video on it and tried all possiable ways, but still my data is not saving into Local Database. and i do not get any error messages. However i can save my data into SQLEXPRESS database. i am using Visual Stodio 2008.
View 2 Repliesi am creating a system where when a command button is pressed, it adds the data corresponding to that command button to a Table of the screen. And basically im at my wits end at how to do this, i have tried using SQL and databases but all i seem to be able to do is type data into the table and this is not what i want.Basically the table has 3 columns at the moment, which are filled in column at a time, and this need to be done by pressing command buttons. To explain this basically there are 8 buttons, which can be pressed to enter into the first column, once one of these buttons is pressed and second set of buttons appear which correspond to the second column and after one of these buttons is pressed the 3rd set of buttons appears to enter into the third column.Once the last button is pressed that is the first row filled in and the user can again press a button from the first set. Its basically a system for rapidly entering data into this table through the corresponding buttons.I have the buttons appearing and all that working fine, but thats basically just the layout. I need to know how to enter the data into the table.i have to use a SQL database, i only added that as at the end of the session, the entire table of data needs to be added to a master database but i can attempt this at a later date.
View 12 Repliesi was modified some my data. then i use this code:
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I want to search record in the database and if the record all ready in the database something do. I use this code but it is not work
Str SQL = "SELECT* FROM student WHERE stdno = '"& txtstdno.Text &"'"
oledbcon.open()
ry
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i have this solution that i'm suppose to make an installer of, but because it calls a datebase and the database is not within the solution therefore it was not included in the installer.
and my installer cant work correctly. is there anyway i can go around doing it?