I want to refer to a data cell, which if it is equals to some string, it will do something.
The codes:
If ds.Tables(0).Rows(i)("Status") = "Reserved" Then
MessageBox.Show("Can't reserve")
End If
Is this the correct way to do this? Because I failed doing so..
I have an Access database where I want to store the contacts in a company: In this database I have a table named "users" where I keep the users which will have access to the database. In the main table, named "contacts", two of my fields "insert_user" and "contact_user" refer to the user who entered the contact information and the user who actually made the contact. The way I am thinking it, I will have to set both of the fields as foreign keys to the same table/field, namely "users"/"username".
So:
I set two foreign key constrains in two different fields ("insert_user", "contact_user"), which refer to the same table/field ("users"/"username") in an
Access database, using VB.Net OleDB (See the SQL Statement below)
ALTER TABLE contacts ADD CONSTRAINT insert_user_foreignkey FOREIGN KEY (insert_user) REFERENCES users (username)
ALTER TABLE contacts ADD CONSTRAINT contact_user_foreignkey FOREIGN KEY (contact_user) REFERENCES users (username)
I open the database with MS-Access. I see that all the tables are fine (as they should be).
However when I click on relationships at Access I get all my tables plus a table named users_1 connected to "contacts"/"contact_user" (the table users is only connected to "contacts"/"insert_user")
It is very strange that in the Table View of Access I don't see this table, but only in the Relationships View.
Questions
Is my thinking right (to set 2 foreign keys, that refer to the same table/field)? What is this table "users_1"? Will my database work or am I doing something wrong?
This is probably a simple process but I can't seem to accomplish it for the life of me. What I'm trying to do is transfer user inputted data from a Visual Basic text box into an Access database. The database consists of only one table with three fields: First Name, Last Name, and ID Number (auto-increment primary key). The VB code I have so far is this:
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[code].....
What I'm trying to do is transfer user inputted data from a Visual Basic text box into an Access database. The database consists of only one table with three fields: First Name, Last Name, and ID Number (auto-increment primary key). The VB code I have so far is this: [Code] I don't know how to code the Submit Button in order to send the data to the table.
View 5 RepliesI am writing a program for a class and it needs to read/write to an Access 2007 database. Right now I am referring to it's absolute path when I use it in connection strings, something like:
Dim conn As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:UsersMeDocumentsVisual StudioProjectsProject1Database.accdb")
This is going to be a problem when I turn it in obviously, because the professor isn't going to have the same path. So I want to somehow include it into my project and then refer to it with a relative path or something so that it will work on his machine. When I imported it through the Data Sources it had an option at the end to copy the database into the project which I agreed to. It put the Database where all of the source files are on my computer, so I tried using Application.StartupPath(
I have names of all labels in a table of an Access database (one field is a form name- it can be repeated, the second field is a label name - it must be unique for the same form, the third field is a text of this label). E.g. the first record has field1="Form1", field2="Label1", field3="Smith" My question: How can I refer to a label programmatically using the Access database? E.g. Form1.Label1.Text= "Smith" In C languge there was the opportunity "remove the quotation marks" from the text ("Label1") and get the literal (Label1). Is this opportunity in VB.NET?
View 10 RepliesI have written the following code to export an MS access table into a text file.
Dim conn As New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Test est.mdb")
Dim cmd As OleDbCommand
[Code]....
i have a comma delimitted text file that i need to add three fields and update the contents of those three fields and then save the text file.
right now i bring the file into ms access and alter the table to add the fields and then update them but i don't know how to export the access table back into a comma delimitted text file.
I'm using the following code to import data from a text file into an existing Access table:
Code:
Imports System.Data.OleDb
Public Class Carrega_CSV
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]....
The first time i ran the code, it caused no error but no records where loaded into the table. The second time it causes the OleDbException "Table 'TEMP' already exists." The text file is comma delimited and it has exactly the same number of columns of the TEMP table.
I am trying to import tab delimited text file to access table. The below code WORKS very well for csv file. when I try the same for tab delimited text it it importing all the fields into one column of the access table and combining the header files as one column.
View 8 RepliesI am creating a project using VB, and I am new to VB, I am still a beginner, I need help in retrieving email address from database when I enter the username, I have added the code below, please review it and let me know, basically when I enter the username it has pull the email address and display in the label..[code]I am stuck at the sql statement as I have no idea how to refer the text box as the username i.e "& uname" it is the name of the text box, is it the right way, also then as I informed I need to paste the email address in the label and the name is label2, I am trying it as " label2.text=da" but I get a error message, I am using Visual basic professional 2010.
View 11 RepliesI have text boxes binded to table from dataset. I make changes, i save changes.. then I open database with access, i can see changes...everything is ok... Then I open application again, changes are there, everything is ok. Then I close application and go to smoke.. when I come back and open application , the new data is gone. what's happening? This is how i save changes:
Me.Validate()
Me.NastavniciBindingSource.EndEdit()
Me.NastavniciTableAdapter.Update(Me.StudentDSET.Tables("Nastavnici"))
Me.NastavniciKonzultacijeBindingSource.EndEdit()
Me.KonzultacijeTableAdapter.Update(Me.StudentDSET.Tables("Konzultacije"))
How can I change the delimiter when writing my Access table to a text file? I was hoping it would be as easy as adding a similar option like we do for HDR=No; maybe Delimiter=|
Dim AccessConn As New System.Data.OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|mydatabase.mdb")
AccessConn.Open()Dim AccessCommand As New System.Data.OleDb.OleDbCommand("SELECT * INTO[Text;HDR=No;DATABASE=" & userPath & "].[" & fileName & "] FROM tblMyTable", AccessConn)
AccessCommand.ExecuteNonQuery()
AccessConn.Close()
I want to add a new table in my accdb and copy the content tfrom an existing table into the new one.
Is there an easy way to do this?
How can I Refer to a Database Field insted of a Texbox or Label text?
I have tried somting like this, but it does not work. Can some one point me in the wright way?
If TableName,FieldName <> Nul Then
. . . . . . . . . . . . . . .
End If
How do I reference the Header and Footer in a RichTextBox? And if I can't how do I access it in a file in RTF?
View 1 RepliesI'm trying to connect to an Access table who's name includes spaces ('look Material Type').How do I identify this table in an OleDB string
View 2 RepliesI get a Syntax Error with the following code"ALTER TABLE receipts RENAME COLUMN payees TO payee"what I am doing wrong
View 18 RepliesI want to populate my table in datagridview from my access database table
I'm not just trying to bind the table in access to my datagridview...I want to put the data's in my access database to my table in datagridview
so far this is my code.....
Sub filldatagridview()
Dim conn As OleDb.OleDbConnection = New OleDbConnection(strConnect)
conn.Open()
[Code].....
I need to Update Access Database Table with Data from a Different Table. Not all the rows of original Table to be Updated will be affected. How do you loop through the 2 Tables to do the required Update.
The Table to be updated is called "RecordList" and Table with new Data is called "RecListReport".Every attempt I've made won't work. I tried to Use 2 Datagridviews but couldn't get it to work right.
NewTestConn()
Dim Testconn2 As New OleDbConnection(NewTestConn1)
Dim da As New OleDbDataAdapter
[Code]....
I'm writing an asp.net page with a simple registration form that connects to my access database and inserts the values in the table. So I have my database, my registration page, everything looks fine in my code, but there's a syntax error I can't seem to figure out. When I go on my webpage and click submit, it says : Syntax error in INSERT INTO instruction.
Here's my code:
<%@Page language="vb" explicit="true" debug="true"%>
<%@Import Namespace="System.Data"%>
<%@Import Namespace="System.Data.OleDb"%>
[CODE]...
I'm trying to insert data from an Access unbounds form to an Access Table using the follwoing code:
View 2 RepliesI have two Access database, say database One.mdb and Two.mdb. I want to use VB2005 to export tblCustomer from One.mdb to Two.mdb, and replace the existing tblCustomer in Two.mdb, during run time. I basically want to simulate the export function that is available in MS Access (which can export one table from one Access database to another) with VB2005 during run time. I can think of a way by querying the table to a dataset and then delete everything on the other database before filling the table in that database with the dataset. However, there should be something simpler and faster than that, shouldn't it? Any idea?
View 6 RepliesLet's say, I have something like a table in the WebBrowser component, it's not actually a table, because the data organized in flash, but, it's organized like a table, it has like rows and columns. You can see more in the attached file. Can I transform this text organized as table into DataGridView or some another tool that serves as table. like_a_table.JPG
View 3 RepliesI have a login form that consists of 2 text boxes: txtUser, txtPass. Now these are not bound to any data table & I don't what them to be bound. When a new user enters his user name & password, I want to add these on a data table that has two columns: User, Pass. Data table information: Data Source = Login.accdb, Data table = LoginTable, Connection = LoginCn. I use visual basic 2010. So how do I do this?
View 1 Repliesi am trying to create a login access for my application. Well, i have 2 account type, that is manager and receptionist. And both account type have their own forms. which mean if i log in as manager, then i will open to the manager forms, and if i log in as receptionist then i will be open to receptionist forms. Can it possible be done?
View 5 RepliesI have column with bit datatype in sql server table(2008).while returing to text box its returning true in text box instead of 1.i tried converting it from true to 1 using txtboolvalue.text=Math.abs(CINT(ReturnList.Item(34)).tostring. But it doesnt convert true to 1
Secondly: im checking for columns in datatable if there are any nulls. its checking for nulls in the sqlserver table but its returning true if there is a null.i just want it to return NULL is there is null i textbox..
CODE:
Then
CODE:
Basically, I've made a dataset with a table inside of it that I plan on using for a quiz program.
If it matters, heres the code that was generated when I did this.
vb Private Sub QATableBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
Me.Validate()
Me.QATableBindingSource.EndEdit()
Me.TableAdapterManager.UpdateAll(Me.Database1DataSet)
[Code]...
I have two Access database, say database One.mdb and Two.mdb. I want to use VB2005 to export tblCustomer from One.mdb to Two.mdb, and replace the existing tblCustomer in Two.mdb, during run time. I basically want to simulate the export function that is available in MS Access (which can export one table from one Access database to another) with VB2005 during run time. I can think of a way by querying the table to a dataset and then delete everything on the other database before filling the table in that database with the dataset
View 1 Repliesi need an vb.net program for access database, in an sql query for append (single column) .txt file into existing .mdb table , i used this code but is not working Pth2 = My.Application.Info.DirectoryPath
[Code]...
