Retrieving Values From Database Into .Net?
Nov 15, 2011
I'm trying to create a function that will check the database and compare it with the value of my label. (Basically a Version Checker) If it is the same, then nothing is displayed, if not, then I'll disable some buttons and change another text to display something. Here's the code I have so far...
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Panel2.Visible = False
[Code].....
I'm positive that I'm just not putting the correct calling reference in this part:
If Mydata(0).Read = Label2.Text Then
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Jun 23, 2011
Im taking over a project that pulls information from a database.Currently I have everything I need except the username.The person who setup the project did it as a web project so he used the MemberShip class to create unique user keys based on the person's username.
The username is not stored anywhere in the database only these userID keys.
The client wants a desktop app that mimics the website behavior of writing to the database.
Problem:I ask the user to enter in a username at the login. The username connects to the database on the server.I have no way of grabbing any user info after this point as the primary key(USERID) is a unique key and not a username. Is there a way to convert a MemberShip ProviderUserkey into a string Username or am I screwed?
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Mar 23, 2009
I have a DEM file(Digital Elevattion Model File) and I am trying to open the file,where we have Latitude and Longitude values inside the DEM file.And, Now I have opened the file using Filestream and Read the file using BinaryReader.But, I am having a trobule in getting the values of Latitude and Longitude.I am getting Byte values randomly as 1,202,31,271 etc.But, we dont have latitude and longitude values more than 180,and also I am not getting 16 bit UInt values.For example, the values should be like Latitude 20.00416666666667 and Longitude 39.99583333333333.So,read the correct Byte values of the DEM file.The code I have used till now is:
Dim fs As FileStream = New FileStream("C:UsersadminDesktopHeader and DEM fileE020N40.DEM", FileMode.Open, FileAccess.Read)
Dim rd As New BinaryReader(fs)
Dim convertDB As UInt16
For i = 0 To rd.BaseStream.Length
[code]....
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May 5, 2009
I've created a module for my website and when a button is clicked, it calls a VB sub on the server.
I need this sub to retrieve the values that were filled in on the form, but the things I need to retrieve values from are not asp controls, they are simple <input> and <select> tags.
How can I retrieve values from input on a .aspx page from VB code executed behind it?
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Jan 15, 2012
I have two forms
-DoctorAppointment
-DoctorSchedule
the DoctorAppointment form has all the details about the doctor and the patient and one Schedule button which will show the DoctorSchedule form When I click on any value in the DoctorSchedule form like Monday or any other day and click on save button it opens a new DoctorAppointment form and store the Day value in the text box of the form. The old DoctorAppointment form stays as it is but the new DoctorAppointment form that appears after DoctorSchedule Save click it removes all the earlier values (doctor and patient Details) that were present on the DoctorAppointment Form.
I want that after the Save click it should not call any new form instead the Day value should come on the old form including the Doctor and Patient Details.
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May 22, 2011
I have 10 text boxes and I'm trying to create an array to store the values entered by the user, I then need to add the totals of all of them, get the average, highest and smallest of all the 10 values entered by the user?
Public Class frmNumberAnalysis
Dim tbArray(9) As TextBox
Private Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click
[code].....
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Apr 9, 2009
I am new to dot net programming.This is my 1st post[:)] I have two text boxes. I have to enter emp no in 1st text box and the 2nd text box should automatically retrieve the corresponding emp name from db for display. how do i go about it using the Text Chane event
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Jul 30, 2009
Below code is written in such a way to retrieve all selected check box values But its retieve only the first selected value
Dim CheckedValues As String
For Each item as ListItem In txt_panview0_ddinput1.Items
If item.Selected Then
CheckedValues = CheckedValues & item.Value
[code]....
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Mar 6, 2011
Dim swQuotation As StreamWriter = New System.IO.StreamWriter(QCHome.QCQuotationsFile, True)
' Otherwise, write the data to the file
swQuotation.WriteLine(QuoationsCustIDTextBox.Text + ":" + QuotationIDtextbox.Text + ":" + ETC.... ETC...
I want to be able to retreive the Value of QUOTATIONID saved in the file, in another form, but i can't seem to get anywhere with it, and its bugging me.The following code Doesn't work, when it should :
'For Multiple Quotations.
Dim Quotationlines() = File.ReadAllLines(QCHome.QCQuotationsFile)
For i = 0 To Quotationlines.Count() - 1
[code]....
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Jun 24, 2011
I have this SQL:
SELECT count (1) FROM users AS total_drafts WHERE version_replace = @sid
SELECT count (1) AS unpublished_drafts FROM users WHERE version_replace = @sid AND moderated = 0
[code].....
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Mar 7, 2009
Finally got to the point of having a work webservice using php and nusoap. I can retrieve values and send. Now what I want to do retrieve multiple values into a data grid, I think. What I want to do is retrieve various messages specific to that user. At the moment I retrieve values individually but as there may be more than one result I assume the datagrid may be the way forward. Now the question is how can I retrieve this information. Currently my data returns in the following format.
name.Text = returnData.name
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Feb 21, 2012
[EDIT: I've found the problem.] So if I have a checkedlistbox and put some random values in it, I can just retrieve the values like so:
[Code]...
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Nov 19, 2010
can anyone teach me how to save data in microsoft access database and retrieving it back from database?[code]so, how do i save it in that and how do i load their data by typing their ic no only..
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Feb 7, 2010
I have a checked listbox that I've populated with a table that has three columns, Name, Address, Phone - and have done so successfully, but when i display the items in the listbox, i would like to retrieve additional values of the checked items other than the primary displayitem.[code]'we now have an array full of the Name column only, from our checked items 'i'd like to grab the other two as well (not to display in the listbox, but to use elsewhere as variables) 'and keep the checked listbox as a control in the above code, the fill_array variable is only populated with the items displayed in the checkedlistbox - my question is, can i keep the display item the same and pull the other two columns from the datasource, but only for the ones that make the checkeditems list?
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Mar 24, 2010
I need to find a method of looping through a listbox and retrieving the index number and values - quite straightforward in asp, but turning out to be something of a nightmare in winforms!Here is the scenario - The user can add values in a textbox, that are in turn added to a DataTable that gives it a unique ID and a row number, this is then bound to the listbox. The user can then move the items up or down the list by adjusting the row number in the datatable and rebinding to the listbox..
The problem that I am hitting is when the user needs to delete an item -the first part is easy - delete from the DataTable and rebind to the listbox. The bit where I hit the proverbial brick wall is needing to loop through the listbox rows and getting both the index number and the ValueMember - that way I can change the row numbers in the DataTable based on the index number against the ID number.
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Dec 15, 2010
I am building VB.NET application that takes data from text files that are exported from a legacy DOS program. These are written to a datatable and displayed in a datagridview. Right now my code simply loops through the datagridview and inserts the data into the database (SQL Server). There is a requirement now that the client number must be checked before the insert to see if it exists in the database. If it does, then the value of one field (tax rate) is checked against the value of the field in the datagridview. If there is a difference, then the rate is to be updated in the database and the data that was in the database is to be written to a history table for audit purposes. If the client number is not there, then we are to do the insert (which is already written). I want to know what is the most elegant and efficient solution for this problem.
I need to compare what is in the database table with what is in the datagridview, update the history table for records that exist, and then insert new records.
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May 14, 2012
Dim NewOutwarsDeliveryNoteNumber As Integer
Dim iSql As String = "SELECT MAX(OutwardsRefNumber) FROM NewOutwards"
Dim da As OleDbDataAdapter = New OleDbDataAdapter(iSql, LoginForm1.Conn)
[code]....
when I try and run this code it gives me the error that says "Column 'OutwardsRefNumber' does not belong to table ."BUt I am 100% sure this column is in my table. what can I do to correct it?
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Jul 26, 2011
I have encountered a problem where in my database I have a column that is a bit either 0 or 1 specifying if a user is an admin or is account suspended or not. And in my VB code I am trying to retrieve that bit. Example code:
Dim dtRequests As DataTable
dtRequests = New DataTable("Users")
dtRequests.Columns.Add("SESLoginID", System.Type.GetType("System.Int32"))
[Code]....
I tried getting rdr.GetByte(3), this tells me cast not valid, but there is no function of which will say GetBit, and if such exists I could not find it.
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Mar 11, 2009
I am coding a banking and ATM application, which is split into two parts. In one part the employees of the bank can open new accounts for customers, edit accounts, etc. It includes assigning a unique PIN code for the customer. This is all saving to a database. The customer then uses the ATM part of the application to withdraw money. They use a unique PIN code to access their account. The problem that I'm having is retrieving the PIN from the database. I want to write a simple If statement, to match the PIN entered with the corresponding PIN in the database, so that it will retrieve all the relevant customer's details, eg. bank balance. The PIN is successfully saving to the database through the following....
Private Sub btnCommit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCommit.Click
If inc <> -1 Then
[Code]....
So how do I retrieve the PIN from the database that matches with the PIN entered and hence, retrieves bank balance, etc?
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Oct 17, 2010
I am using two textboxes, one for roll number and the other for the corresponding roll number.
And I am using 4 command Buttons
Move First
Move Previous
Move Next
[Code].....
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Mar 1, 2011
im having trouble retrieving pdf files from a database and displaying them on a web form i am able to upload it from a dialog but cant retrieve from a access database. below is code that i have written to retrieve and display the pdf . it runs but doesnt display the pdf in the windows form nor does it give any errors .
Dim picture As Byte()
Dim count As Integer
Try
[Code]....
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Dec 15, 2011
i can save the picture in the database, now i have to retrieve it. this is my code for the saving of the picture,
Dim ms As New MemoryStream()
studentpic.Image.Save(ms, studentpic.Image.RawFormat)
Dim arrImage() As Byte = ms.GetBuffer
ms.Close()
[code].....
i saw on the net that i have to the reverse of the pic, i have to convert byte into image.
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Feb 17, 2011
In a test project I was able to add a datasource to a form, bind it to the datagridview and manipulate it as needed. Now moving forward to the actual project, is it possible to add the datasource to a class and sort through the data for use in the class?[url]...
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Nov 18, 2011
I am running into a problem while attempting to to retrieve data from a database. One of the items is an iage and it's throwing an error when I try to convert the byte array to a bitmap.Here is what I have. The exception "Parameter is not valid." is being thrown when on the line bmpImage = New Bitmap(stream)
Private Sub GetCatList()
Dim strSelect As String
strSelect = "Select CategoryID, CategoryName, Description, Picture"
[code]....
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Jun 11, 2011
i am working on a module in vb 10..i have to retrive data from the database between two dates...i have used the following code but not able to get ny output,,nt even an error
Imports System.Data.OleDb
Public Class Form4
Dim con As OleDbConnection
[Code].....
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Nov 30, 2009
I am creating an ordering form. I have created an access database and linked it to VB2008. I am struggling to retrieve records from this database into labels. I am using a combo box to select records from the access db table, but I cant display them.Both my source and target tables have 6 columns and I want to display all columns after selecting record from the combo box.
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Jun 5, 2010
how to connect sql server to forms, and also retrieving files from database to txtbox.
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Feb 23, 2012
Dim cmdstring As String = "SELECT A.ID, ProfileCategory, YearLevel, LastName,FirstName,MiddleName, Section,SchoolYear,StartTime,EndTime,Days,Laboratory, B.Image FROM ProfileInformation A JOIN Photo B ON (B.ID = A.ID) WHERE A.ID=" & lEmployeeID
[code].....
i'm trying to retrieve image from database to my picturebox. but ive got this error -onversion from type 'Byte()' to type 'Byte' is not valid.
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Mar 15, 2009
I'm new to VB.NET and having problem with retrieving information from a MySQL database, when populating the datagrid. [code]
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May 18, 2009
I have a problem when trying to retrieve records from my Access database through WCF. In my application the user enters a Customer ID and the function then searches the database and retrieves all records related to that customer. However, it isn't working as it should. The code behind the search button is as follows:
Private Sub SearchButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SearchButton.Click
[Code]...
this code isn't doing as it should. The DataGridView should display the records relating to a customer but nothing is being returned at all, I'm not even getting any error messages. I've been looking at it so long I must be missing something ,
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