In VB6 I used ADP to confirm record existence by using this script
IF ADO.EOF OR ADO.BOF then
ado.addnew
End if
but in VB.NET 2003, How before using SQL String to Insert the record how do I confirm it's existence in the Table to prevent duplication.
I am encountering a very mysterious error which I have not encountered before. While trying to use VIEW DESIGN OPTION in VB.NET 2003
Solution Explorer to maintain the existing FORM the error message list below appears.Here is the error message that appear in the TASK BAR panel at the bottom of the Screen Property accessor 'IsMdiContainer' on object 'System.Windows.Forms.Design.FormDocumentDesigner' threw the following exception:'Specified cast is not valid.'
I've got a huge problem here. I've managed to add javascript to my server side, but the problem it is not deleting. It doesnt have produce any errors so I don't know where to start:
[Code]...
While I've previously many years of relational databases and procedural languages, I'm stumbling with Visual Basic. In this problem, the simple situation is that I have two files, parent and child. The primary key of the parent file (Area file) is linked by a relation to one of the two fields that makes up the primary key in the child file (Project file) (unique key is formed from 'area' and 'project'). I have the default table adapters created on both files. I have created two maintenance forms showing one each of the two files in datagrid view format.I can create some records in the Parent (Area) file, but when I try to create a record in the child (Project) file, using one of the valid key values from the Area file, I get the 'ForeignKeyConstraint [relation name] requires the child key values [actual value] to exist in the parent table' which I'm absolutely definitely sure it does.
I haven't done any actual coding for those two maintenance forms, just dragged-and-dropped the files from the data sources screen onto separate forms so it creates the controls itself. But I can't work out, if it already knows the data does exist because I can load it back in to the Area maintence form, why it can't check itself to find out the record does exist. Why does it think the record from the parent record doesn't exist? It does exactly the same thing, whether or not the database is in access or SQL Server Express. I have all the latest updates.
I try to find online any example for create an application autoupdate.
When I run my application it check in a webserver if exist new version,if exist the software run update.
My tables are PURCHASE and SALES...In PURCHASE table, fields are CODE(primary key), PRICE, DATE, TOTAL, QTY...when I'm entering datas in form and when i click submit, the datas stored... but when i enter same DATA(CODE), it is showing error...i don't want to show the DEFAULT ERROR message...so, i want to search whether the CODE is already in database or not...i.e When i click SUBMIT button, 1st it has to search whether the CODE is already PRESENT in table or not. if it is not there, DATAS have to be stored. otherwise, it has to DISPLAY MESSAGE BOX.
View 4 RepliesJust a pretty question that seem to me a bit difficult to do it. Well, I have a form called customers. Login form and mainform. So my clients want to have an option that explains this: If a user enters information in the customer form, then that information has to be confirmed by admins panel.
[Code]...
Im using Microsoft Visual Studio 2010
Microsoft Acess 2010
This is for practice
Lets See First off i was able to get to insert records(Code Below)Now im trying to get the program to prompt a message when the id or field exists on the key down event and not enter it if it exists and if it doesnt exist im guessing i could use my already existing code to insert it[code].............
im connect the database using the OLEDB, how to write the code when the user types '02' in textbox1, 'myname' in textbox2 and 'myqty' in textbox3, if database table itemcode field same with textbox1 then will only update the textbox2 and textbox3 in other field, if it does not exist then create the new record.
View 5 RepliesI need to check if a record exist in my sql server [code]...
I need to check if in "Br" exist a record for example "123098"
I want to insert records in the database but before it inserts, it must first check the database whether the value being inserted already exists. Now my problem is that I am unable to insert into the database even though the value still does not exist.
Here's my code:
Dim check As New SqlCommand
Dim sqlcheck As String = "SELECT SerialNumber FROM EquipmentDetail WHERE SerialNumber = '" & TextBox1.Text & "'"
connection.Open()
[code]....
We have a program called MasterPack (old school dos style) which we generate quotes from and this picks up a quote.doc in a folder called Quotes in the C drive which is a mail merge document and populates all the fields. There are 3 files in this Quotes folder,quote.doc, QUOTE.txt, and quote.hedRecently one of my employees had his PC upgraded to a new unit and it came with Office 2007 (previously used 2003) and now we have this run time errorSo what happens now is we go through the steps and then it gets to the "Opening this document will run the following SQL command" and click Yes to continue, the SQL msg comes up again (that never happened before) so we click yes again. It thinks then opens the word doc and populates the fields but then the run time error window pops up and if we choose "End" the merge fields are not populated and return to the merge field names EG. <<CustName>> etc etc.
View 1 RepliesI am new in programming and I'm making an application that can filter records on datagrid from the user's input in textbox..I tried this code that I also got here.. But I'm getting an error.
ERROR MESSAGE:An unhandled exception of type 'System.InvalidOperationException' occurred in system.data.dll Additional information: Fill: SelectCommand.Connection property has not been initialized.
[Code]...
I'm having a problem inserting a new record into an Access 2003 table.The error occures at the line near the bottom with "ExecuteNonQuery()".scroll down in the second block of code.
Within the Incident Information Table
IncidentID is Text
InvStartDate is Short Date
IncidentDate is Short Date
Here is the code.
Public Class NewGeneralIncidentForm
Dim conn As New OleDbConnection
Dim incIdString As String = "0"[code]....
In order to evaluate an indexed property, the property must be qualified and the arguments must be explicitly supplied by the user.
I am creating some basic software for our manufacturing department. I am using Visual Studio 2008 using Visual Basic.The software has a user log in. There is a form in which the choose the worker name, the item they were making, how many were made, damaged, or received damaged from the supplierHowever when they click on the "Update" button to insert the record..i get my custom message that it failed and the record is not inserted. I put a TRY...Catch... around the insert query and it didn't generate an error message.I have been following the code in the OLEDB BASICS tutorial so I am not sure what the problem is at this time.
<add name="MFCTData"
connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\Data.mdb;Persist Security Info=True"
[code]....
I need to be able to test if the current view is print preview in Excel 2003.
Is there something in the excel object model to simply access this property? (Like the application.printpreview in the Word object model...).
PS: Long story short, I'm developing a vsto addin with keyboard short-cuts to my custom functions, and I need to disable this shortcuts when print preview is on.
On the main form of my application, I added a menu strip button to it to open another form rcgntn.vb in my application.[code]...
View 1 RepliesExcuse me for posting this, but I have searched both Google along with this forum before asking this question, maybe I'm not using the right keywords but I apologize if it's easy to find.I would like to know how one could close a third-party window (application) if a specified string was found in the window title.
View 2 RepliesI would like to know how one could close a third-party window (application) if a specified string was found in the window title.
View 4 RepliesIf you have ever noticed in the Task Manager, when you right-click on the running task, you have many options which include 'Minimize' and 'Maximize'. Is there anyway to do achieve this in vb?
View 1 RepliesI have now got a DataGridView on a form with a toolstrip which automatically created for me when I dragged the DataGridView from the DataSources on the Solution explorer window. I now would like to know how can I have a pop out window saying " Are you sure you would like to delete xxx?" with a OK button and Cancel button.
View 7 RepliesPublic Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.StaffTableAdapter.Fill(Me.StaffDBDataSet.Staff)
BindingNavigator1.DeleteItem = Nothing 'Clear the default value of BindingNavigator's DeleteItem property
End Sub
[code].....
When I selected a record in datagridview and hit delete, it always deleted the first row in the datagridview then if I tried to delete any of the row again, it would not let me. I would like the selected row to be deleted,how I can do that?
I wrote an application in VB.NET 2003 and would like to upgrade and use VB.NET 2008. Is there anything I should know before hand when converting my application from 2003 to 2008? Didn't know if it was like converting a VB 6.0 application to VB.NET.
View 2 RepliesI have an application that was developed and is maintained in VB.NET 2003. Is it possible to convert the 2003 files to Visual Studio 2008 and maintain the program in 2008? If so is this fairly easy to do?
View 4 RepliesI have a problem with any vb.net application running on my windows 2003 vps. I've tested this by creating the simplest form with just a button on it and executing the following code...
[Code]...
I am doing reverse engineering of a web application developed in VB.NET 2003.I have reverse engineered one of its dll using a tool names "Reflector".This tool provided the output in terms of a Visual Studio Project. When I rebuild this project then it gives the following error "Project-level conditional compilation constant 'DEBUG;TRACE : CONFIG="Debug" : DEBUG=-1 : TRACE=-1 ' is not valid: Character is not valid."
View 2 Repliesnamespace of "system.runtime.caching" does not exist but in object explorer and microsof exist.i use microsoft visual studio 2010 and .net framework 4.0.i also cant use this name space(System.IO.MemoryMappedFiles & System.Runtime.Caching.MemoryCache)
any body know what is the problem. i want my program after doing something (opening a file or any thing that can do something my program use more memory.)use memory like startup run.
Here's my code:
Option Infer Off
Option Explicit On
Option Strict On
Public Class Form1
Public Sub NewToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NewToolStripMenuItem.Click
[Code]...
I have a gridview displaying all employees. Upon selecting an employee, I'd like to open a new page or window that would display all of the information for that employee with the option to edit/delete/update. Once this transaction is complete, return to previous page with gridview of all employees. ((language I'm usings is VB))
[code]...
I've been asigned to a new project. I have to mantain an application wich was made in Visual Studio 2003 (VB.NET, Framework 1.1) and Crystal Reports wich came included with the IDE. The application is absolutely what we call "legacy code" :).Just to make the test, today I've tried to convert the application in Visual Studio 2010. The converter is offering me download SAP Crystal Reports, with no cost and no registration.The question is: Does anybody has experience with this components?. Is feasible to migrate an application as described to VS 2010?
View 1 Replies