Forms :: Autocomplete Sequence Using DataReader Loop
May 20, 2009
We're using the Autocomplete functionality for some textboxes. We populate the AutoCompleteCustomSource with data from a database query using a datareader loop. The data in the query is sorted by 'recently used', the most recently used entries are at the top.
Let's say the sequence op the AutoCompleteCustomSource is
'AM1900'
'AF2000'
'AD1950'
After typing an 'A' in the textbox, I would expect the Suggested (or Appended) value to be 'AM1900'. The suggested value however is always the first item from an alphabetically sorted
AutoCompleteCustomSource list (i.e. 'AD1950')
View 2 Replies
ADVERTISEMENT
Mar 18, 2009
If my Select statement finds data that matches the criteria, how do I get myReader (DataReader) to read each record when there are more then one record found?
Dim myReader As MySql.Data.MySqlClient.MySqlDataReader
myReader = myCommand.ExecuteReader()
If myReader.Read() Then
[code]....
View 5 Replies
Apr 3, 2011
displaying the first 10 Fibonacci numbers. My code displays the following result: 1, 2, 3, 5, 8, 13, 21, 34, 55 and I need it to also display the first two Febonacci numbers (0 and 1). How would I do that?
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim a As Integer = 0
[code]....
View 3 Replies
Nov 19, 2011
can i do ( ExecuteNonQuery within the loop of a datareader ) in vb.net please help me with example
View 3 Replies
Feb 7, 2010
I m trying to use two datareader in same loop but its not working. Here is the error and code below Error line: DR1 = MyCommand.ExecuteReader()Error message: There is already an open DataReader associated with this Command which must be closed first.
[Code]...
View 2 Replies
Apr 28, 2011
I've wrote a program designed to loop through a text file containing email addresses and unsubscribe said email addresses in our CRM system. I'm having a problem with the following code...
Do While obj_filereader2.Peek() <> -1
strcuremail = obj_filereader2.ReadLine()
Dim dbqCustNo As String = "SQL CODE HERE - SELECT CUSTOMER NUMBER"
Dim exeCustNo As New SqlCommand()
Dim SQLdr As SqlDataReader
exeCustNo.Connection = ConnStr
[Code] ......
The program is falling over when trying to execute the update commands during the datareader loop, with the fabled 'There is already an open DataReader associated with this Command...' error. This program has evolved as I've found problems/better ways of working, so it might be a case of myself just not using the DataAdapter right - I'm guessing I should be using a function of the open DataReader rather than the ExecuteNonQuery command.
View 2 Replies
Sep 9, 2009
How come my datareader looping at the while loop line it become totally no response and without error eventhough I got use the try catch error catching... it only will hang on after few minute... after few loop. Is it the data reader got time out limit?? If exceed the limit it will no response..? Inside my while loop it do a lot of transaction and each transaction also take quite long time... it will affect?
myCommand = New MySqlCommand("SELECT * FROM stk_cus_inv_hd WHERE DocType=?DocType;", conn1)
myCommand.Parameters.AddWithValue("?DocType", "CS")
myCommand.CommandTimeout = 99999
myReader = myCommand.ExecuteReader
While myreader.read <<---- it jam at here and totally no response my coding... but my interface is clickable...
my lot of work here...
End While
View 11 Replies
Aug 28, 2009
I am having a problem to get the results of a combobox when the user uses the tab key to exit the combobox. The combobox uses a database as the datasource. When the user uses the mouse to click on the selection the selectedindex is set proprerly, however when the user will enter some text and presses the tab key, selectedindex is set to -1.
I have attached some test code to duplicate the issue.
Imports System.Data.OleDb
Public Class Form1
Protected dvNames As DataView
Dim conDBTest As OleDbConnection
[Code]....
View 2 Replies
Jun 26, 2010
I have added 6 textbox controls now I want specify the order in which they are accessed when tab is pressed like txtbox1 then it goes to txtbox2 and so on.
View 4 Replies
Oct 6, 2009
Which form events fire when a form is minimized, restored and maximized.I am trying to draw lines on a PictureBox control, but cannot get the draw subroutine to run after the form has been restored from a minimized windowstate.I probably should know this answer, but I have not written much code in the last 4-5 years and am relatively new to vb.netAlso.
View 6 Replies
Mar 20, 2010
I'm using VB.net '08 express and I have a form in a program with a picturebox. I have a series of images in My.Resources. What I am trying to do is get the images in the box to change in sequence whenever the button is clicked.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim sequence As Integer
Select Case sequence
Case 1
[code]....
When the button is clicked, the 1st image appears and the button then does nothing.
View 2 Replies
Feb 20, 2012
I have an SQL statement like:
SELECT FNAME, LNAME, CITY from EMPLOYEE
How do I create a multi-dimensional array from a datareader which should store values like:
John, Doe, LA
Mike, Johnson, PASADENA
Freddy, Kruger, Long Beach
View 3 Replies
Aug 17, 2009
I have a problem with my project. here is the problem:
My code for login is as follows:
dim conn as SqlConnection = New SqlConnection("Data Source.................)
dim cmd as SqlCommand = New SqlCommand("Loguser",conn)
cmd.CammandType = CommandType.StoredProcedure
[CODE]...
Now the error i get is that "there is a datareader associate with this connection that need to be closed"
View 4 Replies
Mar 23, 2009
I'm sure this type of function is simple, but for the life of me, I can't get it.I have 3 forms. Main form holds a list box, which is my shopping cart.FormP holds the print books in a list box.FormA holds the audio books in a list box.I can send the books from forms a & b to the list box cart on main by way of formMain.ListBox.Items.Add(ListBox.SelectedItem.ToString())but I can't access the items once there and associate a cost to throw to subtotal.[code]
View 3 Replies
Apr 17, 2009
how can i loop through all the forms in my application??
View 6 Replies
Jul 30, 2011
I'm a VB.Net newbie, and would like to write a small app that runs a While loop to check a DNS domain name, and exits once the domain has been registered.
I found code at How to Get Host Name and IP Address in VB.Net - .Net Articles & Samples to resolve the hostname and handle the "No such host is known" error if it still hasn't been registered, but I have a couple of issues:
1. How to make sure the GUI is correctly displayed even though there's an endless While loop? Should I use some kind of asynchronous call so that the window doesn't freeze?
2. I'd like the app to mimize to the icon bar, and have its window title display some status information ("Still waiting/Registered!") so that I can simply move the mouse over it and know whether the domain has finally been registered or not.
View 3 Replies
Nov 15, 2008
Is it a way to set the text in a textbox from a loop? Bad Explained, heres an example
Dim id(10) as string
For h As Integer = 0 To 10
[code].....
View 3 Replies
May 6, 2010
how would i ggo about coding this
For i = 0 To maxrows - 1
For h = 1 To maxrows
Me.Controls.Item("TextBox" & h).Text = ds.Tables("TestCriteria").Rows(i).Item(0) Me.Controls.Item("NumericUpDown" & h).Value = ds.Tables("TestCriteria").Rows(i).Item(1)
[code]....
View 4 Replies
Sep 5, 2008
I want to create a table with 2 fields (FormName, ControlName) that consists of all form names and all control names (within that form).[code]...
How do I loop through all forms and controls in my project?
View 11 Replies
May 19, 2012
I am looking for Visual Basic 2010 code that would loop through all the forms in a project, i.e., the equivalent of the following VB 6 code:dim frmFom as Form for each frmForm in Forms
View 4 Replies
May 27, 2011
I am looking for Visual Basic 2010 code that would loop through all the forms in a project, i.e., the equivalent of the following VB 6 code
View 1 Replies
Apr 30, 2009
I am using a for each loop and each time the loop executes, the text of the label has to be changed.. But for some reason, it only changes the text of the label during the last execution of the loop...
Here is the
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim dll
[Code].....
View 4 Replies
Sep 28, 2011
I have a procedure that loops through the directories and subdirectories on a file server and sets the permissions. Procedure is called on a button click on a form.
I need to display on the form which directory is being processed. Similar to if we use the Debug.writeline which writes to the output in Visual Studio. I tried using a ListBox but it only displays the last one and only displays the last one once processing is done. I want to be able to display each directory name as it is being processed.[code]...
View 1 Replies
Jul 31, 2009
Whenever my application goes into a very long loop, the form stops responding. How can I stop this?
View 1 Replies
Dec 5, 2010
I am fairly new to VB but really enjoying programming. I'm looking to create a counter that counts to 25 and loops back around again with a button control and another button control to stop it. So I press a button to start and another to stop and I want it to display the number it stopped on. Is this possible? and how do I do it if it is? I can figure out how to display the label and create a simple counter(that doesn't loop), but I'm unsure on the rest.
View 2 Replies
Dec 1, 2010
I am writing a program in VB 2008 and i need to be able to select different pages. i have a ComboBox with 15 values in it, and based on what value the user selects, that is the Form i want it to go to. for example, if i run the program and select the Value "electrical", then it will take me to the form that corresponds with that selection. [code]...
View 1 Replies
Mar 29, 2009
I have made an app that the user has to type a number, and i want the process for the app to do this how evermany times the user wishes it to do.
for example, the app is ment to create a line in a text document, so they write in textbox1 what they want written on the line, and then in textbox2, tey say how many lines they want to create.
So,
TextBox1.Text = "BLAA"
TextBox2.Text = "782"
It will create 782 lines of BLAA. not just one...
View 2 Replies
Jul 27, 2010
Below is some code I use to loop through rows in a datagridview and set the row colour subject to a "STATUS" field and also changing font colour and boldness dependant on whether a flag has been set to true.
Is this code optimal / can it be cleaned up somewhat?
Public Sub ColourMyGrid()
Dim varStatus, varBagTemp As Integer
Dim myFont As New Font(grdResults.Font, FontStyle.Bold)
For Each row As DataGridViewRow In Me.grdResults.Rows
varStatus = row.Cells.Item("Status").Value
[Code].....
View 4 Replies
Mar 14, 2011
Makes the following statement about the code below:
**"The computer evaluates the loop condition in the Do...Loop statment to determine whether the loop instructions should be processed. In this case, the inputsales <> String.Empty condition compares the contenst of the input sales variable to the String.Empty value. As you know the String.Empty value represents a zero length, or empty, string if the inputsales variable is empty, the loop condition evaluates to True and the computer process the loop instructions. *If on the other hand the inputsales variable is not empty, the loop condition evaluates to false and the computer skips over the loop instructions.
Based on the code I think it is the opposite: ...that while the inputsales value is not empty it should evaluate to true and process the loop and if it is empty it should evaluate to false and skip the loop?
See below.
Option Explicit On
Option Strict On
Imports System.Globalization
[CODE]...
View 2 Replies
Sep 2, 2010
I have a form with many buttons on it and I would like to loop through all the controls in a group control and find out which button is clicked.
I plan to use the click event of the button and I know it's easy to create a click event procedure for all of the buttons but would like to avoid that.
The group control is called GroupFilterButtons.
View 5 Replies
