VS 2008 - Database Not Saving Changes Although (Copy If Newer) Set
Jul 16, 2009
I'm working with VB Express 2008 and MS SQL Express 2008. I have an SQL database in my project which I manipulate in the project by adding to or subtracting from a particular table. The database's "Copy to Output Directory" property within the project is set to "Copy if Newer." Nevertheless, after I run the project, add to or otherwise manipulate the data, save changes to the database and then exit, the changes are not reflected in the table.
I have buttons working that cycles through all the records and everything shows up fine. I also made a simple DB program to test what I was doing without all the extra stuff my current program has and it works fine. Updates the dataset and then saves to the database and reflects the changes. When I tried adding it to this program, I get errors when I click "Save" and "Commit".The "Save" (updates DS) error is: "Additional information: Update requires a valid UpdateCommand when passed DataRow collection with modified rows."The "Commit" (commits changes to DB) error is: "Additional information: Syntax error in INSERT INTO statement."Not sure what either of these mean, the same code worked fine in the standalone program. Looking at another site, they show the exact Save error I'm getting and say it's because I don't have a command builder, but it's up there. [code]
I have some pictureboxes on this form set up to allow me to browse for images, then select one and show it in the box. How can I save the picture I pick so it updates a database and will show that picture when I cycle through the data in the program? It would be an SQL database and it already has columns for the picture. I don't know if I should store the path to the image or the image itself.
I've got a SQL Server and I need to save files somewhere and I guess I hsave two options
1. Save the file path
2. Save the file in the database.
Issues with option 1 are for complicated reasons the file path is not the same for everyone. I'm talking about saving 200-400 per month, is there any issues with saving them into a SQL Server Database that is used by internal employees only?
This is a newbie question. I am trying to create an applicatiojn which allows the user to enter info on plants including photos. I have set up the database using image datatype and created the form using the dataset but when I save the data everything is saved but the image file. Obviously I need extra code but I can't find anything in the help files etc that shows me. This is the code I have at the moment
I've made a code which updates my database using a dataset and data binding source. I can retrieve all fields in the database including the �Picture� field which is set to �OLE Object� however I cannot update this. The Picture field in the dataset is set to type System,.Byte. I�ve search these forums and found how to do it manually which I can do and works but when it comes to the BindingSource.EndEdit section it still tries to update my �Picture� field and fails due to a type failure.
It was �System.InvalidCastException: Failed to convert parameter value from a Byte[] to a String. --->� What can I do to correct this? Below is my code. Note the image saves under the hard coding but not in the second part of the code.
Dim connection As New OleDb.OleDbConnection(My.Settings.AirportsConnectionString) Dim command As New OleDb.OleDbCommand("UPDATE Airports SET Picture = @Picture WHERE ID = " & TextBox10.Text, connection) 'Create an Image object.
I am using the following codes to Save records to MySQL database from VS2008. Dim cmd As New MySqlCommand If cmdSave.Text = "&Save" Then 'save computer main ConnectComputerDB() cmd.Connection = CompDBCon cmd.CommandText = "INSERT INTO tbl_items " _ [Code] ..... Is it the right way and proper method to save records to MySQL database...?
am 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.
I'm working in .NET solution Visual Basic that makes reporting of a database using Crystal Reports for .NET, and I want to store each report after it been generated in the database in xml or in PDF just tell me how?
I have a form containing a listbox showing a list of image names. It's bound to the database table. When an image name is clicked it shows the image and imagename in a picturebox and textbox respectively. When no image is selected in the listbox, a new record can be inserted by browsing a new image in the picturebox by an openfiledialog, writing the imagename in the textbox and pressing the OK button. When an image is already selected, the record can be updated by pressing the same OK button. The data is saved into MSSQL Server 2005. Corresponding table fields are Keycode int autono, logoname nvarchar(50), logo image.Now the problem, when I insert a new data with an image everything goes fine but whenever I try to update an existing data with an image it throws an exception- 'A generic error occurred in GDI+.' at the following line- 'pic.Image.Save(ms, pic.Image.RawFormat)'. Surprisingly when I update an existing data without any image in the picturebox no exception is generated. I have crossed checked it and seems that the problem is just at one point- 'Updating the image from the picturebox'. My code to insert/update the data by OK button and to populate it by listbox doubleclick follows:
Code: Private ms As MemoryStream Private arrImage() As Byte Private conn As SqlConnection
I have a form containing a listbox showing a list of image names. It's bound to the database table. When an image name is clicked it shows the image and imagename in a picturebox and textbox respectively. When no image is selected in the listbox, a new record can be inserted by browsing a new image in the picturebox by an openfiledialog, writing the imagename in the textbox and pressing the OK button. When an image is already selected, the record can be updated by pressing the same OK button. The data is saved into MSSQL Server 2005. Corresponding table fields are Keycode int autono, logoname nvarchar(50), logo image.Now the problem, when I insert a new data with an image everything goes fine but whenever I try to update an existing data with an image it throws an exception- 'A generic error occurred in GDI+.' at the following line- 'pic.Image.Save(ms, pic.Image.RawFormat)'. Surprisingly when I update an existing data without any image in the picturebox no exception is generated. I have crossed checked it and seems that the problem is just at one point-
I have a form containing a listbox showing a list of image names. It's bound to the database table. When an image name is clicked it shows the image and imagename in a picturebox and textbox respectively. When no image is selected in the listbox, a new record can be inserted by browsing a new image in the picturebox by an openfiledialog, writing the imagename in the textbox and pressing the OK button. When an image is already selected, the record can be updated by pressing the same OK button. The data is saved into MSSQL Server 2005. Corresponding table fields are Keycode int autono, logoname nvarchar(50), logo image.Now the problem, when I insert a new data with an image everything goes fine but whenever I try to update an existing data with an image it throws an exception- 'A generic error occurred in GDI+.' at the following line- 'pic.Image.Save(ms, pic.Image.RawFormat)'. Surprisingly when I update an existing data without any image in the picturebox no exception is generated. I have crossed checked it and seems that the problem is just at one point- 'Updating the image from the picturebox'.My code to insert/update the data by OK button and to populate it by listbox doubleclick follows:
I need a reliable way to check if a file is "newer" than one of the same name on a different drive. If it's newer, it will get copied. I have tried something like this:
sElement and sDest are full pathnames to the relevant files If Date.Compare(File.GetLastWriteTime(sElement), File.GetLastWriteTime(sDest)) > 0 Then ' copy file Else Don't copy file Endif This nearly works, but I have a strange glitch with some jpegs. If I drag one from my c: drive to my y: drive (a NAS box) the "date modified" as displayed in Windows XP changes by 1 second. The date and the hours and minutes stay exactly the same (they are files from 2009), so it's not that the file is picking up the current date/time. Very strange ...
If there an easy way to compare date/times and get the difference in seconds? I can then assume a difference of 1 (or even a few) second(s) means the files are the same.
I am trying to create an application, which in first phase will read the content of an XML file, count the products, and copy the content of the XML to a sql server database TEMP table, which i have already created. I have already created the code to read the content of the XML file and view it in a datagrid view. But i dont know how i should copy the content to the database i have created....
The code i wrote till now:
Imports System Imports System.Xml Public Class FrmXMLRead
[code]....
I need to copy each product (code, category, subcategory, part_no, titlos, timi, availability, anakykl, lianiki) to the TEMP table of ABC databaseHow should i proceed to copy the data to a database ABC and table TEMP?
I am trying to download a file from an ftp site only if it's newer than my local fileate to check for the file properties? right now it downloads the file, but just need if newer. The purpose is to update a .mdb with the contents of the file, so don't want to download file and run an update everytime my app runs, only if the file is different. This is the code I am using:
Const localFile As String = "C:version.xml" Const remoteFile As String = "/version.xml" Const host As String = "ftp://1.1.1.1"
I'm using the WebClient class to download some exe's from servers, and everything works well, but I would like to only download the file if the one on the server is newer than the one on the local machine.
Now I like to ask you about (auto) updating application. I know how to check for newer version but I don't know how to download it (and replace the older one). I'm working with .exe files. [code] This is the code which I'm using to check for new version.
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).
I've been passed a solution that has a vb.Net 2.0 project that references to a .Net 3.5 library. The library compiles with out problem but the vb project does not. It complains of missing objects which are in the library which are correctly added in the imports. Also I see a yellow yield sign next to the reference library also when I add the reference it complains of the framework version difference. Any help is apritiated. Also I'm using VS10. Imported the projects with no errors. A colleague has this working on VS9.
I need my application to update as it is on multiple computers. Will the program update and work if I just replaced the files in the application startup folder with the files from the newer version's application startup folder?
I am having another issue with WMP in VB.NET 2010.I wrote an app using WMP in VB.NET 2010, using .NET Framework 4.0 of course, but had to change the framework target to 3.5. After doing this, the WMP component does not work. How, if I even can, fix this problem so that the program will run on .NET Framework 3.5? The error says that it could not load AxInterop.WMPLib.dll because it was built in a runtime newer than the currently loaded one.
[code]....I have a dialog that comes up and asks for a reason for declining the business.I don't want the code to move on after not enabling the "me" until the reason has been entered and saved into the database. Also, at that point where it says "I WANT...." I want to copy the textbox fields into a new database and then delete this entry from the database, how can I do that. I am using VS 2008 and SQL.
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`m making a program.I`d like to know how to make a code which will navigate to my website and find if there's a newer version of my launcher..I`ll search some codes now, If I find some interesting codes i`ll post here so u can upgrade or tell me how to correctly use them for my auto-update.I cannot publish my Launcher unless I`ve an Auto-Update in my Launcher.
rewriting 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>
I am trying to save a ListObject from a .NET 3.5 Excel 2007 VSTO Workbook to a new sheet (done) and save that new sheet to a new workbook (done) without that workbook requiring the VSTO customization file (!!!!!).
Has anyone had any luck with this? The only way I've had any success is just saving as a CSV file but that's not exactly acceptable in this case. I'd rather not save to a CSV just to copy back to a XLS file.
I have managed to create a connection to the database and am able to save information to it from my form, the form contains 22 textboxes, a save and another exit button. I have set the form to retrieve data in the form_load. I have used the "UPDATE" SQL command on the save button and it does save the data on all 22 textboxes (all textboxes are linked to their separate columns). But only one record will be needed that is why I did not use the "INSERT" command.
The problem arises when I click the save button, all (19) textboxes are saved but when I retrieve the text (by reloading the form), each of the 20, 21, 22 textboxes (only) the text of the 20th textbox keeps on moving tho the next textbox e.g. 20>21>22>20>21>22 is interchanged amongst themselves.
