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
[code]....
hows to remove the selected row when i click on delete button of selected item in listview ?
View 1 RepliesI 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"
[code]....
Im doing that when delete button is clicked in the listview:(code simplified, it delete as it should)
Protected Sub rlvCarts_ItemCommand(sender As Object, e As RadListViewCommandEventArgs)
If e.CommandName = RadListView.DeleteCommandName Then
[Code].....
The issue comes when deleteting it will perform itemdatabound twice (but listview prerender once).
[Code]...
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,
The following code does not seem to delete the record in the table...
Imports System.Data.SqlClient
Imports System.Reflection
Module UpdateSys
[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.
CODE:
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) ?
View 8 RepliesHow can I modify the below code to get a result as it is in the vb6 [code]...
View 9 Repliesmodify the VB6 code to VS 2008 for delete command?
View 11 RepliessqlDA_FrmOTUnit_Delete_Select_Venue_Period_UnitName.Fill(SqlDS_FrmOTUnit_Delete_Select_Venue_Period_UnitName1, "OA_FrmOTUnit_Delete_Select_Venue_Period_UnitName")
Me.BindingContext(Me.SqlDS_FrmOTUnit_Delete_Select_Venue_Period_UnitName1, "OA_FrmOTUnit_Delete_Select_Venue_Period_UnitName").RemoveAt(0)
Me.sqlDA_FrmOTUnit_Delete_Select_Venue_Period_UnitName.Update(SqlDS_FrmOTUnit_Delete_Select_Venue_Period_UnitName1, "OA_FrmOTUnit_Delete_Select_Venue_Period_UnitName")
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...
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'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 have problem on how to insert the data into the oracle database 10g using visual basic 2008
My coding is like at below:Dim cmd211 As OleDbCommand
cmd211 = New OleDbCommand("INSERT INTO STUDENT_DETAIL(STUD_ID,STUD_NAME) VALUES(@STUD_ID,@STUD_NAME)", con)
.Add("@STUD_ID", OleDbType.VarChar).Value = txt_studId.Text
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.
How to delete multiple rows in a single table i used "truncate" command.
This is my code for deleting:
Private Sub tranc()
Try
Dim dbconn As OleDbConnection
Dim dbcom As New OleDbCommand
dbconn = New OleDbConnection(cnnstring())
[CODE]...
I used access database on it. when i run my prog. i got this error "Invalid SQL statement; expected 'delete','insert.... or 'update'.
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...
View 1 RepliesFirst 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 _
[Code].....
I am currently using psexec.exe from PsTools to send a command to a remote system to fire a command through a command prompt however I am finding that the shell I am doing does not seem to like the spaces in the path.
[Code]...
Any ideas on how I handle the following error thrown in the SqlDataAdapter.Fill as a result of the BeginTrans in the callee?
System.InvalidOperationException = {"ExecuteReader requires the command to have a transaction when the connection assigned to the command is in a pending local transaction.The Transaction property of the command has not been initialized."}
[code].....
Public Sub ExecuteTransaction(ByVal connectionString As String) Using connection As New OleDbConnection(connectionString)
Dim command
As New OleDbCommand()
Dim transaction
As OleDbTransaction
[Code]...
I am using the following code to run defrag and to analyze if the C: drive requires defragmentation:
Dim analyze As Process = System.Diagnostics.Process.Start("C:WindowsSystem32defrag.exe", "C: /a /h /u /v")
This process runs through analyzing, runs it in normal mode & prints the progress to the command window.
My problem is that as soon as the process is complete the command window closes. I need it to stay open so that I can read the results.
I am trying to send a command to the external command line (cmd.exe) from the Windows form application that I'm writing in VB.NET (using VS2008).
I can only access the external program thru the command line (its not my program) and I must do so from a form app.
I am trying to use the following code. I am able to call a cmd.exe window, but I can't pass the command line my command.
Using mp As New Process
With mp.StartInfo
.FileName = "cmd.exe"
[Code].....
I want to add a new select command to my dataset. To do that, I have added a new partial class to my project. Because we have to use partial class if we want to extend generated dataset codes. [code]...
View 3 RepliesI am using a CheckedListBox that is populated with Filenames (full path, i.e. C:TestTest.jpg)When I have the files that I want in the CheckedListBox I wish to click a Start Button which will process the list one at a time using an exe program that runs on the Command Line. There are arguments that need to pass to the command line as well as the file location in order for the program to process.I currently have it working but the issue is the loop finishes quickly and it is left up to the CMD.exe to finish the process. What I would like is for the LOOP to wait until each file completes processing before passing the command for the next file in the CheckedListBox.There some reasons I wish for it to work this way.
1) I would like to have a button that can Pause/Restart the Loop.
2) I would like to have a button that can Stop the Loop so the whole process can end.
3) I would like to have the Loop remove each file one by one from the CheckedListBox after it has been processed.
4) I would like to display a Message once all the files have been processed.
5) And if it were possible I would like to report the status either by text or a progress bar showing where it is at in the process.
6) And the ability to add some error handling if possible.
Since the Loop finishes so quickly as it just passes the command to the command line using the & as a seperator it is the command line that is handling the rest of the process. Because of this there is not control over it in the GUI.The code I am using allows the Command Line text to display in the Form so it won't open up a seperate window to run CMD.exe. This is the desired affect as I would like everything to appear to run from within the Form itself.
[Code]...
User need to select their prefferable data to show in report. What i did is i have a clear command first to delete the temporary table. The temporary table is basically a table to stored user selection parameter data. After the clear command, i have
a insert command to insert user selection data into the temporary table. What happened now is when i run the program exe, first run of the report is work fined, but not the second and the following times of execution. It will return null or blank report. The weird thing is when i execute it from development environment, it seem like the report is able to pick up user selection parameter and run the report for the first times and the subsequent execution.
i have seen this in many codes, just not sure where to start and how to call the command. what i'm talking about is having code as such (this is for save file dialog):
[Code]...
In the Windows Shell, there is a command that looks like this: copy /b fileA.zip + fileB.jpg fileC.jpg..Is there any equivalent function in VB.NET? I already know this works: [code] But I would much rather have a built-in function to work with. Here is what I am trying to do: url...Also, this doesn't just work for pictures. It works for any binary file. Is there any way in VB.NET to tell if a file is binary or text?
View 3 RepliesIs there a way to hide the characters of a "set /p password=Enter Password:" command? Or any new strand not using the SET command i could use instead?
View 2 RepliesI have a javascript file that contains the function for calling the confirmation delete window, the code used is similar to the following:
function Delete()
{
confirm('Delete this user');
[code].....