Auto Increasing A Field In A Table
Feb 24, 2012
I have a small page, with a button on it. When I click the button I'd like the code to look at a a field (call the field "InvoiceNumber") in a table (call it "InvoiceTable"), take the last number stored, increment it by "1" then store it back in the "InvoiceTable" and display the new invoice number on the page.Currently the button is called "New Invoice", so clicking this button is going to create a new invoice, with a number one newer than the latest one in the table.
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Feb 24, 2010
I am building a data based application using VB 2008 an SQL Express. I need to create textboxes on my form using code, (With & End With) method. I need a simple code string that will allow the app to check if the field to wich the textbox wil be databound is Nul, If so the textbox will not be created.
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Jul 22, 2010
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.
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Jul 8, 2009
I currently have this working already for one of my combo box's, but when i try to use the same code i get this error ''There is no row at position 6.'' . The are 2 fields in the table asset_type_id, asset_type_name', im trying to dispaly the values in a combo box for the field 'asset_type_name.
the code for ' Friend Sub RetrieveCustomerInformation2()' works but the other friend sub throws the error.
Imports System.Data.SqlClient
Imports System.Data
Imports System
Imports System.Data.OleDb
[Code]...
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Feb 23, 2011
I have a query that I have to run that requires me to get rows from a table based on the value of a field in another table (which I have gotten earlier). I currently have it done like this (simplified).
[Code]...
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Jan 12, 2010
Probably a simple question for most of you. I'm putting members of a group into a SQL Database so we can better manage attendance and 'points' that they earn for doing work. I've written the program in VB and have the SQL server running fine. However, I have created a separate table to handle the points and have marked the relationship between the table - the column is named 'PointID', and should be unique for each person. When I add a new user to the database, I want it to automatically assign a value to that without me having to do anything extra beyond pressing save. From this PointID, it should identify the user and it will bring up the person's points.
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Apr 7, 2010
I have text field that a user enters a date in. Based on what they enter a drop down box will appear or not appear. To obtain the info for the code to control the drop down I am using an auto post back on the text box. This is however making the app a bit clumsy as the user is taken back to the top of the page.
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Nov 15, 2010
how i can implement below requirement using asp.net and vb.net.I have three fields in a form which are filled by users. Based on these three values, i need to auto-populate the 4th field.I have planned to implement this in the following way.Write a separate class file with a function to calculate the possible values for the 4th fields based on 1st 3 inputs. This function can return some where between 1-10 values. So I've decided to use drop-down for 4th field, and allow users to select the appropriate value.Call the above function in onchange function of 3rd field and take and use the return values to populate the 4th field. I'm planning to get the return values in array field.(Does this need a post back?)
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Mar 26, 2012
so below is my code. I am trying to get the autonumber generated in newdb into txtcallid field. the error i get is that the field is not unique. What i am trying to do is to get the form to fill the db witha new blank record, assign the auto number and then display that number with the blank record info in my form. I will be making it so that the data must be changed before saving so that the form will not be blank save for when it is loaded.
Imports System.Data.OleDb
Imports ChessyFunk1._5._1.ADODB
Public Class frmNewCall
[Code]......
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Apr 12, 2011
I developed a VB form which has a bunch of text fields. I've an external excel spreadsheet. I want a particular cell from the excel file like "A5" & the value to be auto populated in the text field of the VB form. Is this feasible?
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Oct 6, 2011
How would I create an automatic updating time field (every minute for instance), without everytime having to refresh the entire webpage?
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Dec 20, 2011
I have a class that exposes an auto implemented property Enabled
[Code]...
But If I had not use an auto implemented property and declared my own backing-field as follows this is accessible from the subclass: Private _Enabled as Boolean ---- EDIT ----
The abve line is incorrect - this is not possible, it was in fact Protected in the original code which allowed access from the sub class See @JonSkeet answer ---- EDIT Of course I can just access Enabled from the sub class to work around this but can someone explain why this is the behaviour?
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Jul 14, 2009
I am using Visual Studio 2005 (Visual Basic) and MS Access 2003 I am trying to build an application in the lines of the book "Doing Objects in Visual Basic 2005" by Deborah Kurata. So, I have a Data Access Layer (DAL) Class Library that is separated from the business logic layer (business objects) Class Library. I try to add a new business object such as a "Customer" to the Access Database, where the "Customer" table has a PrimaryKey "CustomerID" which is an AutoNumber field. I am successful in writing the values to the database, but I can't figure out how to know the "CustomerID" of a newly added "Customer" so I can populate the business object with the respective values.
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Dec 3, 2009
I have some values in the registry to set the user name, I also have a web browser, How would i make the web browser auto fill in the user name field in the web page window on load?
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Apr 17, 2010
I have a textbox, a sql database, a binding source bound to the sql database. I can use auto-complete mode of the textbox with custom strings and it suggests in in a drop down form as the user types in a textbox. How can I use autocomplete mode with datasaved in different records of a field using the bindingsource?
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Jan 20, 2012
i two tables named tblaccess(nID,nRoleID,nModuleID,cAccess) andtblmodule(nModuleID,cModuleName) and i have a datagrid which is bounded to tblaccess. the problem is, I want to display cModuleName from tblmodule instead of nModuleID. please tell me how.
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Apr 3, 2009
i'm importing a text file into a access table like this:
vb.net
sql.CommandText = "SELECT * INTO [tblMailList] FROM [Text;DATABASE=" & frmMain.FolderName & ";HDR=NO].[" & frmMain.TextBoxFileName.Text & "]"
sql.ExecuteNonQuery()
my question is what is the best way to add an autonumber to the table? i currently do it like this:
vb.net
sql.CommandText = "ALTER TABLE [tblMailList] ADD COLUMN [ID] AUTOINCREMENT;"
sql.ExecuteNonQuery()
but when the file is too large i get this error: "File sharing lock count exceeded. Increase MaxLocksPerFile registry entry."
and yes, i have tried to change the registry entry and it didn't work:
vb.net
My.Computer.Registry.SetValue("HKEY_LOCAL_MACHINESOFTWAREMicrosoftJet4.0EnginesJet 4.0", "MaxLocksPerFile", "9000000")
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May 8, 2010
still having problems with mysql... im trying to find out how i can you a for each statement when getting data from mysql table...i have a table with IP and Port fields in... i want to get each and every one of the ip's and use it...for each ip in heat table and then run my "query()" function how can i do this in vb.net?... i can get ALL ips and ports and put in a gridview but would like to use the ip and display the Game Server Data that my query() function gets...this is from a while back when i made my Game Server Browser and just tryiong to make a better way of keeping my ip and port data and mysql seams to be the best way as its online and it can be added to and edited as and when needed and no one has to "redownload" anything?
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Mar 17, 2012
Is it possible that i would only want to insert one field from a table into another table?
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Apr 23, 2012
I have done plenty of VB programming using flat files etc... Now I am attempting to create a SQL database (I have my sql 2008 express box up and running) I can connect just fine, I made my database, made an account and made it data reader and data writer. I even gave dbowner to my user for testing. I created some tables, and I can access them through the dataset designer in VB 2010. Now what I have been trying to figure out all day.
[Code]...
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Feb 2, 2009
I want to retrieve a value from a field of a table. How can I assign this value in the text of a tooltip. The tooltip will appear when the user will move the mouse on a textbox.
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Jun 4, 2009
I am trying to insert data into two tables on two different forms. My problem is that I don't know how to get the last entered Auto generated ID from the first table to pass it to second form.
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Oct 12, 2010
How can I call my TextBox ID = "txtFromAddress" data to a table that I am trying to send? Right now it is just showing the text '& txtFromAddress' on the table on the email that I send.
[Code]...
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May 6, 2009
I have a table and I want to select a field in it and then display it in a text box
something like:
SELECT userName
FROM userTable
WHERE (userLogged = 'ON')
how can I display the selected username in a textbox?
BTW the userLogged indicates wether the user is logged in or not
if the user is logged in then the userLogged will be changed to "ON"
if the user is not logged in it will be "OFF"
I know it's not that practical but I'm still practicing.
I'm using Visual Web Developer 2008 Express I use table adapter procedures for querying
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Oct 28, 2011
I'm trying to get the list of field names for a given table, to turn them into a string which I can to post back as a variable to another function.I've Googled loads of stuff regarding GetSchemaTable but all I seem to be able to output are field parameters, but not the actual value of these parameters (ie ColumnName, which is the one I actually want!)
Found this page; What is the SQL command to return the field names of a table?But all the queries on there give me an error "You do not have access to Table 'Columns'"I feel sure this is pretty simple, can someone give me a little function that will simply give me fieldNames = "fieldName1, fieldName2, etc"I am using a MySQL server and ODBC connections ASP.NET using VB.
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Jul 2, 2010
I have a table of reports and queries that users of my application can run. I now have a need to allow them to execute a Function and I'd like to treat the function like I have my reports and queries by listing it in a table with a 'friendly user title' attached to it and then when the code executes, it would reference the name of the function that I have in another field of that same record. I can't seem to figure out how I can get VB to understand and treat the value in a field as the name of a function and execute it.
Table
Friendly Name Object Name Object Type
Report of Costs rptCosts Report
List of Costs qryCosts Query
List Active Emails ActiveEmails Function
In my current code I check to see what type of object it is that they want to execute and use either DoCmd.OpenReportor DoCmd.OpenQuery. Now I want to execute a Public Function that I have created that will open its own form to display the resulting requested information in.
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Mar 18, 2011
I am using a VB.Net form in which I have a table of sql. In it is a boolean field.
I want to show this field in a form as checked if that field value is true and if false then it should not be checked. Is this is possible?
If possible please help me with the code which I have to type to make that column in the datagrid view to checked or not.
I have created the sql inside vb.net using add new item and then a database.
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Jan 31, 2012
I have a problem deleting specific field in the table. Instead of deleting specific field in the table, the entire row that is selected in the flexgrid is being deleted. please give me idea what code should I add to delete my last row in the flexgrid at the same time delete the data from the database. This is the code i have so far.
Private Sub cmdUnload_Click()
Dim db As Database
Dim sql As String
[Code].....
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May 19, 2010
From within Excel, I want to import data from Access. This is simple enough using Microsoft Query. What is not so simple, at least to me, is how to get the SUM of numbers in a specific field in a specific table in Access. I do not need to import every number in the field only the SUM of the field. I need this 'total figure' to be placed in a cell in an Excel spreadsheet.
The data is listed in the Access table in this order: (there are others but these are the three I am interested in)
TimeStamp, Terminal, TransActionTotal
Simplistically, there are three cells (A2, B2, C2) on on the spreadsheet (one for each terminal). The first should show a total for the day for Terminal 1, the second for Terminal 2 and the third for Terminal 3. Is there a way to get Excel to read the data in the table, add up the appropriate fields by date and then write this total in the appropriate cell? If it makes it any easier, the date is recorded in another cell on the spreadsheet (let's say E1).
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Nov 27, 2011
I have an access database called BKWThermDB1. Within than I have a table called THERMOWELL_DATA. within this table I have a column called QuoteNumber. All I want to do is search that column for an existing number so I can let the user know that this number already exists and to create a different number. I am using the code below which will tell me my Column exists. How can I alter the code to tell me if a certain number exists within that column?
Imports System.Data.OleDb
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
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