Navigate Through Records In A Table One At A Time?
May 17, 2012
I have a form that is used to navigate through records in a table one at a time. The form generates the number of textboxes required automatically. Navigating through the records is easy enough, but when I click the update button it comes up with the error: Object reference not set to an instance of an object.
Here is the code I have for when the Update button is clicked:
Dim con As New MySqlConnection
Dim da As New MySqlDataAdapter
Dim Query As New MySqlCommand
[Code]......
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Jun 9, 2011
im working on views that can help me navigate through records in a table. i have managed to execute an sql string to select the table i.e "select * from Users".i however want to build a "Previous" and "Next" command on the view but im mixed up on the navigation [code] Now all i need is code for going forward or backwards to a record.
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Jan 29, 2011
i wanna to nevigate record at the click event of a command button. I have done my connectivity properly.so give me an idea with a proper example by which i can understand the nevigation code in vb.net
[Code]...
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May 30, 2009
I have been working on database programming alot over the last few weeks, and up tell the last few days I feel like no progress has been made. I didnt understand how to use the databinding features included in Visual Studio 2008 and had a hard time hard coding. It has been making much more sense but the only book I have found thus far to be extremely helpful is a VB 2005 book. I have the database connected and displaying the records, but cant get the next and previous button working correctly (I got rid of the navigator that automatically gets added when you add a new data source, and am trying to code my own buttons). The book instructed me to create a currencyManager, and I declared it CurrManager in my code.
CurrManager = Me.BindingContext(DsCompactDiscs, "tblCompactDiscs")
this is what I coded for the CurrManager and the following is the code for the next button.....
If CurrManager.Position < (CurrManager.Count - 1) Then
CurrManager.Position += 1
Else
MessageBox.Show("No more records.")
End If
I can click next all over and over again, and once it reaches the end it gives me the message i wanted it too, it just doesnt update the textbox with the next records data.
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Apr 11, 2010
i m working on this application not able to figure it out i wanna move to next record when i press keyboard Right Key and Previous Record when i press Left key
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Jun 5, 2010
I have the following code i got from another thread and modified it to be able to navigate through records. The first record of the table is loaded into the textbox, but will not navigate. Tested already with a combox and worked, so i'm sure there is data in the bindingsource.
Me.BindingSource1.DataSource = MyData
Me.BindingSource1.DataMember = "ParentTable"
Me.BindingNavigator1.BindingSource = Me.BindingSource1
[Code]....
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Apr 22, 2012
I 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.
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Jun 9, 2011
Below is my code to call the records or save/update to the database which works fine
[Code]...
I have been trying to add First Previous Next Last buttons to my windows form (visual studio 2008), everything I have tried or found does not work.
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Mar 27, 2012
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]....
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Sep 15, 2010
I have a data table of 96 rows each of which displays sensor readings taken at 15 min intervals during the day.I would like to navigate this table using the trackbar.
I dont really understand how to do this. I have googled and experimented but havn't workied it out.
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Mar 27, 2012
I do this in Oracle databases just in a snap, but now I have to do it in VB using ADODB and I don't know how to do it.
I have two Access 2007 tables. Table A contains: Col1 (text), Col2 (text), Col3(date), Col4(amount), Col5(text)
Table B contains Col1(date), Col2(amount) What I need to do is to insert into table B the records of table A (col4 summed) grouped by date of table A. The date is a variable contained in a text box so it cannot be hardcoded into the SQL statement.
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Jun 12, 2011
just wondering how do i transfer table's records to another table??i'm wondering where do i put the queries, or am i gonna put it in my stored proc?
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May 24, 2012
I have a form with two web browsers. I have webbrowser1 navigate to a parent url and webrowser2 navigate to child url.
The page in webbrowser2 loads correctly but when I make a change to an element it doesn't also change the value in webbrowser1 as it should.
Should I be looking at cookies or something else?
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Aug 24, 2008
I want to make something that can on button click navigate to a page, wait the time I specified and navigate to another page..
[CODE...]
This does not do what I thought it would do..I think that the problem is that when it sees System.Threading.Thread.Sleep(5000) everything stops for 5 secs .How can I make it go to google.com and then after 5 seconds, yahoo?
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Aug 28, 2011
i able to insert the table but i unable update to another table at the same time
my
Imports System.Data
Imports System.Data.OleDb
[Code].....
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Mar 17, 2011
i have the following records, the FIELD(Timed) is formatted as datetime in sql
1/1/1900 12:00:00 PM
1/1/1900 12:02:00 PM
1/1/1900 12:05:00 PM
i used this query using my crystal report(XI).
crys_rep.selectionformula = "{vClient.Timed} >= #" & dFrom.text &"# and {vClient.Timed} >= #" & dTo.text &"#"
... other codes is point to my crystal report location and refreshed.
why there is no record found using my visual.net 2008
but when i try to sql query using the following code:
Select Timed from vClient where (Timed >= '12:00:00 PM') and (Timed <= '12:05:00 PM')
there is no problem..
I'm using Vb.Net 2008, SQL 7, Crystal Report XI
dp.SyntaxHighlighter.ClipboardSwf = '/dp.SyntaxHighlighter/Scripts/clipboard.swf'
dp.SyntaxHighlighter.HighlightAll('7c90d506846a47cda9bc951d960bafe6')
dp.SyntaxHighlighter.HighlightAll('1ce19e03a5a54baea62fef35fbb94f92')
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Jan 24, 2009
I would like to do like this...When I click a button, it will capture the times the button had been click retrieve 10 records at one time...For example, when the button being click for first time, it will retrieve the first 10 records and put into 10 textbox. Then if the the button being click for second time, it will retrieve the records from 11 to 20 and put into 10 textbox and so on. I had the following codes:
[Code]....
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Jun 11, 2011
I 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.
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Mar 25, 2009
I wonder how we keep records alive in listview..i m entering data into listview from textboxes...but when i stop and again run the program i get new listview...the record i added from textboxes are not there..i want to display the records everytime i run the program.[code]...
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May 25, 2011
In VB.net, I am making a daily journal. I want to automatically put a Time & Date stamp as well as the person's user ID in a memo field when the user clicks on the memo field to append information. I am using Access 2003 for my table and VB 2010 for my programing.
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Mar 17, 2011
I'm using VB.net 2008 and I just want to know the syntax or the command that gets the number of records in a table.I saw numerous syntax on the net like this
count = " SELECT count (*) FROM payroll_table "
but it doesn't work for me.
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Mar 6, 2009
I try to delete all record in a table (.mdb msaccess) and I have the next code:
Me.Validate()
Me.Db1DataSet.Tables("tabl").Clear()
Me.TablAdapter.Update(Me.Db1DataSet.Tables("tabl"))
Me.Db1DataSet.AcceptChanges()...
But this don't change my table...
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Jun 8, 2011
a.Create a database named "techdb" and create a table as "Personal" with Employee No, Name , Age & Salary
b.Insert 2 records to the table
c.Design a form in VB.NET e to Add, delete and Update records
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Feb 21, 2011
I am a asp.net convert to VB.net and very new to VB.net(visual studio) I am trying to insert some records int a table. It seems the same code in asp.net does not work in VB.net. Here is an example of what I am trying to do
Dim Conn as New SqlClient.SqlConnection
Dim cmd as Ne SqlClient.SqlCommand
Conn.ConnectionString = "Data Soure......yada yada yada..."
[Code]....
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Nov 23, 2009
I'm getting an exception error when trying to insert a record to a SQL table in VB.NET. Following is my insert command.
cmd.CommandText = "INSERT INTO RunnerDB VALUES ('" & txtLast.Text & "', '" & txtFirst.Text & "', '" & txtMiddle.Text & "', '" & txtAddr1.Text & "', '" & txtAddr2.Text & "', '" & txtCity.Text & "', '" & cmbState.SelectedValue & "', '" & Integer.Parse(txtZip.Text)
[Code] ......
cmd.ExecuteNonQuery()
I am getting the error on the cmd.ExecuteNonQuery()...it says: Syntax Error near ','. I can't find the problem.
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May 17, 2012
In a single table i want to save three records in at a time. with a single query. how i can do? can u give a simple example?
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Mar 30, 2010
I want to return the top 5 records of a table in a dataset for datagrid view. The following does not work.
DataGridView.DataSource = DS.Tables("TABLENAME").Select("SELECT TOP 5")
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Mar 1, 2011
Programmatically using vb.net, could we export all records of a sql table into a txt file at once?
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Mar 27, 2009
copying some record from a table in the same table,changing only the fields of the data(month);- copy last month record fields, and the new records have to date, last month+1(actualy month);- i wish to be a button, like update or copy, to do this;- new filds are added every month;- how i do that?
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Apr 8, 2012
i have a datagridview with (a lot of) rows. With a click of a button I add them into a table. Everything works fine. I want to create a log of the records that have been added into the table.
[Code]...
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