I am using access db . In my db one of the table called tblprojects and one of the col called Projects. I want to get the number of Projects , so how can i write the code for getting the number of Projects value? Generally in vb6.0 we can use recordset, by using this put while wend loop.. but in the vb.net how can i get? any how i will send my vb6.0 code plz any one can send code in vb.net.
In vb6.0:
CODE:
Sqlserver Table1holds data as follows
date---------------sno
01/01/2010-------1
01/01/2010-------2
01/01/2010-------4
01/01/2010-------5
01/01/2010-------7
02/01/2010-------1
How to findout missed sno in 01/01/2010?
I want to get this result
3
6
Ok I have a search Button that will search through a student table and produce the grades of all the stdents in a class room when I enter the class room number into a textbox(txtclass.Text). The results will be displayed in a DataGridView and also I have the average grade of the class displayed in another textbox(marks.Text).
My program runs fine but I would like to add more code so that If I enter a wrong classrom number into the search textbox and Search for it then I would like a messagebox to pop up and say that the classrom you have entered does not exist. .I have tried different if statements but none has worked for me so far.
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I tried using the following codes but it's not working,
Dim Con As oledbconnection = new oledbconnection()
con.connectionstring = "Provider = Microsof.jet.OLEDB.4.0; Source=c:\program file\database.mdb"
dim sqlcmd as oledbcommand = new system.data.oledb.oledbcommand()
sqlcmd.commandtype=commandtype.storedprocedure
sqlcmd.commandtext = "query"
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How to make only one record at a time get inserted in the database table and also delete from the other table?
Once the details are filled ,I insert it in table1 as the new record and I delete the same record from table2.[code]...
I am looking for sample code that will allow me to read, write and edit records to a local MS Access DB using VB9.For my project, the datagrid and other controls are not an option.I have looked everywhere and cannot find any code examples.I assume it should be straight forward, but with all the changes in VB9 its tough.
View 1 RepliesI need to disable a button after its pressed so the user does not have the ability to click it again as this would replicate the process in some cases.After alot of searching I found some tips - alot of code I found I could not understand.This is what I have come up with:
On page load:
If Me.Page.IsPostBack Then
'lblDetails.Text = "disabled"
[code]....
I also read somewhere that I should use: System.Threading.Thread.Sleep(1000) to delay the process or something - not entirely sure why I would do this though.Although, the problem with my above code is that when the code behind page performs validation checks, it exits sub before executing my INSERT SQL code - so when it does this it also disables the button.I am not entirely sure if the above method is fool proof or whether it is a **** piece of code that won't work 100% of the time.On another website I found a script to put on the actual HTML page with <script> tags:
Code:
<script type="text/javascript">
disableSubmit(frm) {
[code].....
I have the following VB code that I'm trying to create a text file if the results from the SQL query is greater than zero. Here's a screenshot of my error i'm getting.
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MolhadoRef is a refactoring-aware SCM tool that is capable of capturing andversioning of the semantics of Javaprogram entities and refactoringoperations that were performed onthose entities.
View 1 RepliesI need to disable a button after its pressed so the user does not have the ability to click it again as this would replicate the process in some cases. After alot of searching I found some tips - alot of code I found I could not understand.This is what I have come up with:
[code]...
I also read somewhere that I should use: System.Threading.Thread.Sleep(1000) to delay the process or something - not entirely sure why I would do this though.Although, the problem with my above code is that when the code behind page performs validation checks, it exits sub before executing my INSERT SQL code - so when it does this it also disables the button.I am not entirely sure if the above method is fool proof or whether it is a **** piece of code that won't work 100% of the time.On another website I found a script to put on the actual HTML page with <script> tags:
[code]...
But although this works, it does not execute my VB code in the code behind page so I am a little confused where to go here.
I can retrieve records from my Database fine, but I'm having trouble updating records. I am getting a syntax error on [code] I get this error when I change the Last Name (Row 0, Column 1). [code]
View 4 Replieshow to get records into oracle database delete from db & update the records i have successfully connected my vb 2008 win form with oracle 10g.
View 1 RepliesHow do I update records in a dataset with records in a transaction file?
View 3 RepliesI'm Rather new to coding, and It seems like I skipped some of the basics, and jumped in the deep end.I'm having a couple of problems, as I have an ordinary text file called "Orders", and this file stores Orders, placed by users of my program.The Users write to the Orders.txt file, 5 lines per Order, For Example :
Item Name
Item Quantity
UserName (Of user)
[code].....
I want to search the records from the textbox and display the records to the datagridview, if there are no records, just display empty on the datagridview.
this is not working:
Dim sqlsearch As String
sqlsearch = "SELECT * FROM setting WHERE mname LIKE '%" & TextBox.Text
[code].....
I have this piece of code wich works perfectly when inserting records into one table using records from another table. My question is that now i need to create another table by using records from 3 other tables (tables are related). Can i use aliases on the column names, like on Oracle SqlPlus? How will be the syntax of the 'INSERT INTO SQL statement?
Dim MyConn As ADODB.Connection
Dim MyRecSet As ADODB.Recordset
Dim tmpSQL As String
MyConn = New ADODB.Connection
[code]....
I am working on creating a program that records animal data (wombats) and stores it into a database, using vb.net. I am trying to add new records into a database but every time I click add, to execute that, there are duplicate records that gets added. How do i write the code so itonly adds it one time. I am using a data reader. Here is the
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I want to search the records from the textbox and display the records to the datagridview, if there are no records, just display empty on the datagridview.[code]
View 8 RepliesI have a dataset containing 2 tables,Customers and Contacts. Just showing the master-detail is not a problem. Problem occurs when I try to search the master table to bring in the detail table. Searching the master table shows only the master record, but not the related detail records. Adding a 'findby' query on the detail table only shows the records.url.. Normally when the master table is filled, the detail record shows in a form.
View 1 RepliesI have a database with 3 tables: Student, Unavailability and Duty.The fields for Student are entered in a form I have. One of the fields in Unavailability is filled by a form, the other fields are an autonumber and a foreign key to the Student table.ow I want records in the Duty table to be created and automatically filled in depending on what the values of the fields are in the Student table.For example, If the Boarder field in the Student table is 'yes' then I want the Duty Number field in the Duty table to be '1', '3' and '4'. If it is 'no' then I want the value to be '2' and '5'. I recognize it will have to create several different records to incorporate the different duty numbers for each StudentID. Obviously this will require an if statement, however this is my first time implementing a database with my limited experience with programming and Visual Basic, so I don't know how to refer to the specific fields in a table and set the value of other fields depending on the data in other fields.
View 6 RepliesI have some code to execute code at runtime...
Here is the main
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Try
If TextBox1.Text.Trim <> "" Then
If TextBox2.Text.Trim <> "" Then
[code]....
When the button is pressed, it all works and the following files are created: yahoo.dll and yahoo.pdb My question is this: What is the code to load the already compiled yahoo files to execute the code again, without having to recompile the code?
This code was posted in Chit Chat and everyone is saying how great it is. I just have Visual Studio 2010 and no familiarity with VB6 so I thought it would be good to convert the code to Visual Basic 2010.
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i can add records to mysql database but it won't appear in the listview. [code]
View 3 RepliesThe following code deletes the records from the table on run time but not actually from the MS Access database. I have deleted all the records and when I restart the application, all records are exist.
How to solve the problem?
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I have created a form called new users, I have added my data source, draged over the objects I want from the dataset onto the form and all is well appart from the fact that I cant delete records.
To add them I simply click the add button, put in my info and then click the little disk button to update the dataset.This does not work for the delete button though, instead I get the following error
UPDATE REQUIRES A VALID DELETE COMMAND WHEN PASSED DATA ROW COLLECTION WITH DELETED ROWS.
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I have an app with one database, with one field/table.When i fill in this for the second time or more, i will see the diferens from last time til now.I want the diff betveen the two last records
Table 1= Water1 Last week we used 200 liter This week we used 210 liter, the diff is 10 liter
I have problems retrieving records for a particular day. And is kind of urgent now. I'm using DateTimePicker1 & DateTimePicker2 to let the user choose the date. After which I want to retrieve all records that fall within this date frame. However, my access database is in Date/Time field. I want to ignore the time and find all the date records. How should I do it?
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I need to get the count of the records in my app. But BindingSource.Count always counts NewRow too if I select the new row. And this causes an exception. Is there any different method for it?
View 1 RepliesI have 2 tables one is called Product Table and the other is called item table the item table is in gridview I can get the product primary key into the itemtable using a comb box but how do i read the rest of the information for that record into the item table from the product table.
View 2 Repliesi am using MS-Access 2003, VB.NET 2008, I am able to select and delete recordes. But how can I move between records?
Imports System.Data.OleDb
Class Window1
Dim cn As OleDbConnection
[code]....
This is what I have done so far but how can I movenext,last,previous,first? The way we used to in vb6 with recordsource.