Table Changes Not Being Committed To The Database?
Oct 9, 2010
I am new to VB Studio.Net 2010 and trying to learn how to use it by tackling a small project.I started a brand new project and created a blank form with the following code. It is linked to an encrypted SQL Server Compact database that has two tables, tblComports and tblParams, and I have allowed the password to be saved with the connection string. The code seems to run without a fault and the message box pops up showing "256", which implies to me that the records were added to the table and should have been committed to the database since I re-issued a Getdata() after I issued the Update. Yet when I select "show table data" for tblComPorts from the Database explorer for tblComPorts it is still only an empty table.
To further confuse me I added a DataGridView control to my form and linked it to tblComPorts. When I ran the code first time it confirmed my failure by showing me an empty table. I ran it a second time and the table was filled. Now every time I run it the
I have a very simple database application where I have an underlying table connected to a form with a text box for each underlying field. I have added a databinding navigator, and then created a dataset and bound each text box to the dataset (all using the IDE tools in VS 2008 Pro). When I run the program, I can load all of the entries from the database, create new ones, and scroll through all of the entries (including the new ones), and make changes. The changes are kept withing the program, so if I make a change to an entry, then move to the next one, and move back, the changes remain, but when I look at the underlying database, none of the changes are in the database. What am I doing wrong? Is there some sort of command that I need to run to commit the changes to the database?
[Code] my issue is that now i need two cases, first i need a query that will return the date created and modified of the table and i also need to know if its possible to query a list of table names in the database ordered by date created but that have a certain thing in their names. for example the database contains the following tables: [Code] and what i need the query to return is the tables that contain "Data", settings and employees are for the other functions of the program. so the query should return the 4 data tables in order of date created. but i have no idea how to go about doing that in the query, does anyone know how this is done?
I am having a remote server it has INVENTORY DATABSE , and also iam having same databse in my local system. I want to populate by local database table with my Remote database table through Vb.net code by click a button. How to do this .
I am trying to change some properties with a property page during design time. The properties get set okay and the form updates (graphically) and the new properties appear in the property list, however they do not get written to the designer. If I close the form I am on and then reopen it the changes have been purged. However, if after I make a change with my property page, I manually change anything on the form, then it knows it is dirty and commits the changes to the designer.
Currently have a program on the market and just did a major update which 100s of people downloaded, the problem is that that update had a major bug which made it crash. So quickly got to work to fix the bug but everytime I connect my software to the FTP database I get this Error Message:
"The underlying connection was closed: The server committed a protocol violation."
I triple checked my code. Everything is right One minute it was working the next minute it wasn't,My buyers are getting very frustrated and I've had to cancel all orders due to this., The bug in the update software which I have now fixed but this other bug to do with protocol violation.I havent tested if its just now my computer that the error messages comes up or it happens on others.I've tried 3 seperate FTP servers and all the same results?
For some reason i am getting this error when I try to upload to my ftp:The underlying connection was closed: The server committed a protocol violation.This happens at the GetRequestStream() portion of the code. here is my
Private Sub FTPUpload(ByVal p_FilePath As String, ByVal p_FTPServer As String, ByVal p_FileNameOnServer As String, _
im trying to either download a webpage source or get the source and load it into a variable but i keep getting an error:The server committed a protocol violation. ection=ResponseHeader Detail='Content-Length' header value is invalid
Public Sub DL_webpage(ByVal url As String) Dim client As WebClient = New WebClient() Dim stream As Stream = client.OpenRead(url)
I have a database that has two tables in it. One is a table of items (table1) and the other is the table of current items (table2).On form load I need to generate a random amount of the items from table1 and populate table2 with them. I was trying to do something like this:
I added a table to my Access database. I added that table to my dataset. Using Database Designer VB Studio, my table and tableadapter show up in the design view. The class definition is in the datasetdesigner.vb, and it shows in the object browser. But, I can't reference it in code. I am a newby and obviously missing somethning.
How can I update local dataset with mysql database without making duplicates. Assuming I set some column in mysql as primary key, which has unique string.
adapter.fill will just add duplicates, but adapter.clear before that is not an option.
So I want to update if the key column is the same with mysql data and if there is option for ignore adding new row.
I need to Update Access Database Table with Data from a Different Table. Not all the rows of original Table to be Updated will be affected. How do you loop through the 2 Tables to do the required Update.
The Table to be updated is called "RecordList" and Table with new Data is called "RecListReport".Every attempt I've made won't work. I tried to Use 2 Datagridviews but couldn't get it to work right.
NewTestConn() Dim Testconn2 As New OleDbConnection(NewTestConn1) Dim da As New OleDbDataAdapter
I am creating a database in VB.NET for a movie rental place. I currently have three forms;
Member Information DVD Information Borrow DVDs
What I would like to do is when I am viewing a member's details, if I click a button 'Borrow DVD for Member', the member's ID number transfers over to the Borrow DVDs table in the Member ID which also would hold some information from the DVD Information table, but I'm sure if i can figure out how to do this firstly, I will be able to apply the same rule and work it out myself.I have been trying to use a query statement like;
INSERT INTO [Borrow DVDs].[Member ID] [IN goodstuffvideos.mdb] SELECT [Member Information].[Member ID] FROM [Member Information]
but that has been coming up with error codes and completely not working.
Borrow DVDs table fields are: Borrow ID, Member ID, DVD ID Number, Hiring Fee, Borrowing Limit?
DVD Information table fields are: DVD ID Number, Title, Rating, Hiring Fee, Borrowing Limit Member?
Information table fields are: Member ID, Family Name, Given Name, Address, Town/Suburb, Postcode?
The error coming up is; Error in INSERT statement. Unable to parse query text.And under that it says The query cannot be represented graphically in the Diagram and Criteria Pane.
I've uploaded in SkyDrive my project to give a better picture of my problem:Cascading Combobox works just once in _SelectionChangeCommitted, and, DataGridView do not follow 3rd Combobox filter?
I'm trying to upload a file to a web server through FTP using the following code...
Const MYFILE = "myfile.txt" Dim FtpFullFileName As String = "ftp://server/mydir/" & MYFILE Dim WebFullFileName As String = "http://server/mydir/" & MYFILE
I am using the tutorial posted here for my database testing. I have gotten it to display the data using a messagebox but it just goes through them 1 by one. I want it to display all the data from the database in a table on my form.
Using connection As New SqlClient.SqlConnection("Server=71.200.87.112MySQLExpress; Database=database_test;User ID=sa;Password=greddy6;Trusted_Connection=False;")[cod
I am trying to copy a table from a network database to a local database. I used DAO and could check if the network table existed using a function that tried to assign a TableDef object to the table in question. If there was no error then I assumed that the table existed and the function returned true...Or it would error out and return false.I could then proceed with the copy or not as the case may be.I am converting the code to ADO.net and need to know how to check for a table. [code]
I have a form that cycles through a database table with next and prev buttons Database name is "China.accb" and the table is called Users Table Users has two fields, both text.One is called UserID and the otheris Password"am getting an error message when I try to click the next button that states: "Unable to cast object of type "System.String' to type System.Windows.Forms.Textbox'. I've highlighted the line causing the error below
Imports System.Data.OleDb Public Class frmUsers Dim intMaxRows As Integer
I have to write a code in vb.net (2010).To get a data from Database A table 1 and dump it to Database B Table 2.What's the best way to do this? Most efficient way? I know I can do this very easily in sql management studio but I need to write a code to do this in vb.net.
I am trying to copy a table in a database into another database on another connection in VB.NET, using OleDb. If they were on the same connection I would just use SELECT INTO, but they are not. I have two different OleDbConnection and cannot see an easy way to do this.
Right now I am attempting to just copy the database into a DataTable using an OleDbDataAdapter, and then loop through the DataTable and insert every record into the target database one at a time. This obviously takes a ton of time for the large DB I could potentially be dealing with, and I have to deal with escaping strings, null values, etc.
edit - just to make this more clear: I have two OleDbConnection objects, one is linked directly to a local .mdb file on my computer (JET). The other is linked to a database on our servers (SQLOLEDB). I am wanting to do this:
"SELECT * FROM fromDB INTO toDB"
But I can't because fromDB and toDB are on different connections, and the OleDbCommand object is only attached to one. The only way I can see how to do this is to connect to fromDB, copy it into a DataTable, connect to toDB, and copy all of the data in the DataTable row by row into toDB. I was wondering if there is an easier way to do this.
i want to update my inventory table in database from another database name. Example: In VB, i had a form named Orderform. User need to select e product that they want and key in the quantity. all these information are able to store inside my database named ORDERTAB. but now the problem is i wanted to update another field in my database named INVENTORY by minus the quantity tat the user had key previously. i totally had no idea how it going to works.
I have a dataset (WW1Dataset) with one data table(WW1).(database used in an access database) I'm trying to filter the dataset e.g a user wants to filter by a chosen surname (SurnameTextBox.text) so the datset is filtered to display only those records wherethe surname column in the dataset matches SurnameTextBox.text.
I am using VB 2008 Professional with the SQL Sererver that is installed with it. I have a SQL datbase in my program. The database has a table with several columns on which a parameterized query is based for selecting a specific jpg file name out of 114 of them at run time. I want to add a column to this table that contains the actual jpg images, so that they are stored and retrievable directly from the database.If I go to Server Explorer, expand the database, expand Tables, right click on the table for the jpg's and select Open Table Definition, I could add a column with Data Type "Image". If I a column this way and then opened Show Table Data, how would I add the jpg's in the column with the Data Type "Image" or is this the wring way to add that jpg's to the data base?
I'm trying to program a sort of point of sale system which involves getting the completion time of a job from a database, and then calculating the total value. So far I have[code]....
tableList = Conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, New Object() {Nothing, Nothing, Nothing, "TABLE"}) For i As Integer = 0 To tableList.Rows.Count - 1 rtn.Add(tableList.Rows(i).Item("TABLE_NAME").ToString()) Next
I am using above way to get the table name in the database, but it returns several temp table such as "~TMPCLP...". How can I get rid of it? Is this the right way to obtain the table names?
I need to create a new table in my access file (database) named the current date. each time the program runs I need it to check if the database has a table named todays date (eg 23102011) if not create it and store the name for use later.
the colums are to be timestamp and another is item, qty and price.
it will be used like a log for items that pass through the system.
this what do for summing total records....when it's integer it's fine ..but i m doing summing for time...late_time is datetime...it gives me error..how can i add all total time from ltae_time column....???
