I always have trouble with this every time I create a desktop app which needs to update data from a database.So, I have created and coded my form to load data into a data grid view control, I can add data to the data grid view and it updates fine but when I come to delete a line, I get the error message below
System.InvalidOperationException was unhandled
Message="Dynamic SQL generation for the DeleteCommand is not supported against a SelectCommand that does not return any key column information."
Source="System.Data"
I'm trying to delete a record from an access database using the command object in vb.net 2010 express but can't seem to get anywhere.If I run the code below, I get no errors but nothing happens. The connection opens fine but the db does not update.the table has only two columns.The variable strCrit is so that I can build the sql string with exclamation marks, When I debug.print the sqlupdate string it seems to read fine.the routine is called from a form with a button.
Dim sqlupdate As String Dim strcrit As String strcrit = """"[code].......
I am working vb.net in visual stdio 2005.I want to delete a row from my table the tables's name is displayed in listbox, when I press delete button in my app nothing happen's.
Private Sub cmdDELETE_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdDELETE.Click Me.SqlConnection1.Open() Dim mycom As SqlCommand Dim ra As Integer
I have a project with Access using datagridview on the vb 2008 express, I only have on table - sysdep(id,sysaccount,syspw), and insert, delete, update the record to the Access table. On this delete,
my deletecommand delete all my rows whenever i delete a row..but when i view it again the other rows still there and the i deleted is actually deleted.[code]
*WeightCheck is a dataset connected to a mdf SQL server file..Datagrid on form is bound to the dataset..This code executes because datagrid on form updates with the deletions..[code]
Im trying to delete a field from bookid and it doesnt work. Is there something wrong with my query. When i compile it i get a message of Data type mismatch in criteria expression.
what is the vb.net command to activate copy on an external(non vb.net) program (such as IE) ? also what is the vb.net command to activate paste, delete on an external(non vb.net) program (such as IE) ?
the row gets delete in the dataset when i put RemoveAt(0). But when i want to refelect in the database, it gives me the error: "Update requires a valid DeleteCommand when passed DataRow collection with deleted rows."
Primary Key Issue!!!! Hell such a litttle mistake mannn... toooook so much time and so irritating...
My apologies I have posted this in the wrong catagory It should be in VB.net, my mistake)Hi guys I posted this question at the end of another topic I started but I think it will be over looked as the origional topic was solved of the dreamincode community You must all be getting sick of my quexstions by now haha I suppose you don't learn if you dont ask.
Anyway I have used the delete sql method to delete data from a database, I want to refresh the data in the form after the record has been deleted. Do I have to close the form and then open an new instance of it? or is there another way I can refresh the data?
I'm going through a book which is teaching me some basic coding principles of the language. The current section is detailing how to set up a master child form using two tables linked with a foreign key. The master table is displayed as a number of text boxes, and below is a grid with the child table which shows related records to whatever master record you happen to be checking out. At the top of the screen are the default navigation controls that are added with the grid. The master table is named Person and the child table Book. They are linked using a foreign key and have cascade set up on them.
The book informed me of the code required under the save icon on the navigation control so that when it is clicked both tables will be updated as required. It is as follows: If Validate() Then 'Make sure editing has completed on both master and child tables Me.BookBindingSource.EndEdit() Me.PersonBindingSource.EndEdit() [Code] .....
I have double checked that the code matches that shown, so this should in theory work fine. But if I manually delete a record from the Book (child table) grid and then click the Save icon on the navigation bar it comes up with the error "Update Requires A Valid DeleteCommand when passed DataRow collection with deleted rows".
Why changes made are not permanently saved to the database? I gather that it's using a "copy" of the data in the database but how do I get the code/form to make changes to the actual underlying database records as well as just the copy? I find this system very unusual, if someone deletes a record in the application why would anyone want this to be just done temporarily?
I am creating a form that creates new users and then updates them to a dataset, I have done this ok, but I am getting a runtime error when I delete a record. Please see below the exception being thrown
"Update requires a valid DeleteCommand when passed DataRow collection with deleted rows"
My code below
CODE:
So I know I need to add a delete command, but how do I write this in code and do I write it in the saveitem click event? I guess I would because the app crashes when I click save to update the dataset.
[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.
How can be find out which file is going to delete when, user provides command like DELETE or SHIFT + DELETE or by programmatically gives DELETE command. Well I know about FileSystemWatcher Class, but this class doesn't provide information before delete...
First let me say that I am not sure whether or not this should go in this section or the API section, and if it needs to be moved I apologize. My issue is fairly straight forward, but for some reason I cannot get it to work.
I am trying to send a command to a command line and then submit the command. I have been trying without success to get this to work in v2008 Express and v2010 Express, Here is the code I am trying to us:
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" ( _ ByVal lpClassName As String, _ ByVal lpWindowName As String _
i am developing a small tool by using VB.Net. I want to display data in comboboxes from a table which is in an access database. I using SQL query. Its a simple problem , I think the problem is in my COMMAND. I want to display data as DISTINCT(No repeating data). I am including the code and design form.My code(for form) is
/// Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load cn = New Data.OleDb.OleDbConnection cn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=\CTCRI-STUDENTSRajeev R NairRajeev.Dept.ESSVariety FinderVariety FinderTuber.accdb"
i am creating login page with database connection.In my database i have 4 column which is Name, phone, address and department. I also use query in my stafftableadapter to retrieve data. i want to know what is sql command should i use if i want retrieve data where department is counter. Below is my code but i got an error. SELECT * Name, phone, address department From Staff WHERE department = Counter
I got a system which i want to insert, delete, update the data into my database and the data from database will be display using datagrid. The below is the coding for one of my button, delete.
Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click Try btnSearchEmpNo.Enabled = False[code].....
Now I wanna set when user click on this button to delete a employee (for example) then the datagrid that i have in my application will not show the data of the deleted employee but in the background, the employee haven't been deleted from database.The employee only will be deleted from database when the user click on SAVE button.I know this application have to use RowState but how?
I am working on a project for my final in vb.net and I have a weird error when I try to insert info into my database. When I run the application it errors out on command.ExecuteNonQuery()and the error is Syntax error in INSERT INTO statement. I have the fields in my database are set as text at 255 chars. I have both inmports statments at the top, and as far as I can tell my statement is right.
Here is my code. Dim con As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source =../../Base/LogTextCopy.accdb;Persist Security Info=False;") Dim StrSQL As String = "INSERT INTO TIMEANDDATE(DATE, TIME) values(@date, @time)" Dim command As New OleDbCommand() command.CommandText = StrSQL [Code] .....
I am using VB 2008 Express, connected to a MS Access database for some reason my update command is not updating my database.i may have something wrong [code]whats wierd is when i change UpdateCommand to SelectCommand, it will update the database, but it makes other things in my program malfuncation, so i cant have that as SelectCommand, there must be a way to have it all work with the Updatecommand ..
