Pulling SQL Data Into Text File - Some Fields Null / Blank
Apr 2, 2010
I am trying to pull sql data into a text file. The code works just fine, until some new data comes in from lazy employees and a couple fields (used for notes/comments) are now left blank. Originally I've never seen them blank so I didn't think anything of it.
col2 = myreader.GetString(1)
It will error if the field is ever null - I even tried using a case when:
case when note is null then '" & empty & "' else note end and set the variable emtpy = '', but vb still thinks that it's null and errors?
I finished every piece of code in my program save for one tid bit, how to pull two numbers from a text file. I know how to pull lines, I know how to pull search strings, but I cant figure out this one to save my life.[code]The two numbers that I need out of this are the two ones that I put in the **'s (the asterisks are not normally there). These numbers will be different every time this sheet is generated, and the number placement might be different as well as some of the numbers could have 4 digits, 5 digits, or 6 digits.
1/15/2011; somedescription ; Joe Blow ; $50 1/18/2011; somedescription ; John Doe ; $30 2/1/2011; somedescription; Joe Blow; $90
I want to be able to pull all rows of data associated with Joe Blow if a users selects Joe Blow from a combobox. In testing this out I added the code to a button
Im trying to come up with a do while statement that reads through a text file till the end while pulling out 3 different matched items, then writing those matched items to ascending spots in an excel file, and then creating a bar graph according to the saved data. Sounds complicated but...I have the program reading the text file, pulling out the first iteration of all three, writing them to an excel file, and I have it even graphing them the way I want it to. The only thing I havent done before (and which is probably the easiest), is creating the do while statement so it keeps searching line to line for the three interactions of what im looking for and writing them to ascending spots in the excel file.
Right now my code works like this, which is perfect for pulling out the first 3 and creating a graph, I just inserting a do while and a rowindex + 1 variable.
vb Dim alines() = System.IO.File.ReadAllLines("C:deviceinfo.txt") Dim amatch As String Dim muvalue As String
[CODE]................
I have a feeling in order to pull this off, I do not want to use the, "ReadAllLines" option and possibly want to put the text into an array.
And do something like: if lines.count > 0
But im not familiar with how arrays work in VB, and more specifically what the syntax is. The other tricky thing I am trying to add is an if statement that adds to a variable (such as i) everytime a line is added to excel so the program will write to ascending lines. I was trying to have the it work with the do while statement but pretty soon realized that if I did: i = i +1. Everytime it went through the loop then the data was going to be on random lines corresponding to their place in the text.
I am working on a timekeeping application, using Visual Basic 2008 Express edition with an Access 2000 database.The application requires the user to complete a timesheet by recording in tme and out time daily. Blank fields are perfectly frquent and perfectly legitimate.Using these lines of code it works perfectlywhen there is a time value in the database.[code]This indicates to me that the code to ignore a field containing nothing is not working
i want to take a comma delimited text file and then select all unique records based on one of the fields in the text file. should i read the text file into a data table or just use a data reader?
I have a from with a datagrid, binding navigator, and textboxes, nothing too fancy. This project is for a database management program. I am trying to have a messagebox show up if certain fields are left blank such as
If Ordertxt.Text = Nothing Then MessageBox.Show("Test") ' This is just for a test If CustomerTxt.Text = Nothing Then CustomerLblERR.Visible = True If Order_StatusComboBox.Text = Nothing Then orderstatusERRLbl.Visible = True [Code] .....
But no matter where I put a message box,(on cancel button, on random button on binding navigator) it closes down the form and goes back to the main form. As far as I know it is the only form this happens on.
When i parse some html and get the fields i need using regex, the first 4 fields returned are fields i don't need, so essentially i need all fields returned after the 4th one.
vb.net '// First piece of data we want... Dim stringID As New Regex("(?<=><optionvalue="").*?(?="">)", _ RegexOptions.IgnoreCase Or RegexOptions.Singleline) Dim stringsMatched As MatchCollection = stringID.Matches(stringClean)
[CODE]...
Is there a way i can blank out the first 4 fields returned?
i have a combobox which get value from database through dataset. when i run the program n click on the combobox, the value is auto fill in with data from database. is there anyway to add a blank entries to the selection on the combobox??
The code below works fine as long as there are values within an XML node (For example the <CPU>Intel</CPU> node below) but it throws an Exception error when the node value is blank/null whatever as in the example node <Monitor> </Monitor>.t's ok if the node value is blank, I just want to check for it and not throw an exception error.This question uses the following XML snippet below: Note: The tag <Monitor></Monitor> has no value in it.
How can I ignore a blank line in between the data in a text file using VB.NET? For example, I have a file with data like this
Line 1: 020220date20101231salesvalue52.. Line 2: 356465date20101231salesvalue52.. Line 3: Blank Line Line 4: **strong text** Line 5: 356465date20101231salesvalue52.. Line 6: 356465date20101231salesvalue52.. Line 7: Blank Line Line 8: 356465date20101231salesvalue52.. Line 9: 356465date20101231salesvalue52.. continues...
Basically I've got a list of items in a text file, but sometimes a blank line gets inadvertently put in there, and I need to be able to delete that line (or change that line to a set value, either is fine).
I have a text file that I'm reading into a listbox. I want to skip a line if it's blank. The following code works if I leave out the check for the line being blank. It puts the file in the listbox with no errors. However, when I include the If statement that checks for the line being blank, I get an ArgumentNullException in the Items.Add line when It gets to the end of the file.
'Read Multiline File Dim FILE_NAME As String = "C: empliz-etsy.txt" ' If System.IO.File.Exists(FILE_NAME) = True Then
I have a notepad txt file that has two columns of data. Vb reads data having one blank space (this is in column one) but ignores any other data beyond two blank spaces. in addition to being able to read the second column, I want to store the data thats in the column 2 in a separate string.
How can I get this to happen? I googled around and it seems setting the CUSTOM FORMAT to " " when the field is null will work but not for a BOUND datetimepicker.
I'm trying to use StreamWriter to write to a text file; it creates the file fine, but when I open it up, it's still empty. I marked the code below where the writing action takes place.
vb Public Sub BHorse_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BHorse.Click Dim oMarketsReq As New BFExchange.GetAllMarketsReq Dim oMarketsResp As BFExchange.GetAllMarketsResp Dim BFWrite As System.IO.StreamWriter BFWrite = IO.File.CreateText("C:Datamarket.txt") With oMarketsReq
I have an Access database file, which the application needs to connect only when it needs to run a query. The database has five fields. The first two fields contain numerical values (double). The rest are text values.
Well, I don't have trouble accessing the database file. In fact, I don't have trouble running a query on those three fields containing text values, either. But I have trouble making a query on numerical fields. If I run the following, the application will exhibit a data mismatch error.
'MyConnection As OleDbConnection 'MyAdapter1 As OleDb.OleDbDataAdapter 'nIP is a large number like 3647665152
I have this code for my update checker. It loads a blank text file on my server containg the current version. I have it set to naviagte to this url then searches the web browser for the current version. If it cannot find it then there is a newer version, and a button becomes visible which lunches a webpage that has the current version. I would like it to loop my Check_for_update code until the webbrowser1.statustext = "Done" Below is the code i have but it doesnt work for some reason. Private Sub Update_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
I have about 7 different DateTimePickers that I populate with data from my database. In my database there are Date fields that are actually NULL like a date hasn't been set. I have allowed for this to happen but every time I load up the information into the DateTimePickers, a default date appears even if no data is there in the database. If there is no data, I want the DateTimePickers text to be nothing. Is there anyway around this annoying problem?
I have a FormView where I pull data from one table (MS Access), and then insert it (plus more data) into another table. I'm having issues with the dates.The first table has two date fields: date_submitted and date_updated. In some records, date_updated is blank. This causes me to get a data mismatch error when attempting to insert into the second table.It might be because I'm databinding the date_updated field from the first table into a HiddenField on the FormView. It then takes the value from the HiddenField and attempts to insert it into the second table:
Dim hfDateRequestUpdated As HiddenField = FormView1.FindControl("hfDateRequestUpdated") myDateRequestUpdated = hfDateRequestUpdated.Value '... It then attempts to insert myDateRequestUpdated into the database.
when i try to assign data to an array from a text box, i get a null reference exception, stating "Object reference not set to an instance of an object".
I have tried to import an Access Request in Excel. However, the last field (SP) contains Null cells and it seems that it prevents the importation in Excel. There is a way to change Null cells?
Sub Creating_Universe() Dim connFI As ADODB.Connection Dim rs As ADODB.Recordset
I have a form that validates a users info, address, phone, etc. I want to have the form submit the data only if all of the fields are valid, but haven't had any luck. Right now the fields are able to validate but the form submits the data to the text file regardless of whether the fields are valid or invalid.
Here is my code Imports System.Text.RegularExpressions Imports System.IO Public Class Form1 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load End Sub [Code] .....
How to create an if then statement to only submit the form when the data is valid. I was thinking I might have to set up a separate function but I'm not sure how to set it up really.
I've been having some trouble being able to pull the text from the monthly balance column and displaying in the textbox (remainbalancebox) beneath it, all I can make it do is display the text in the bottom left column, when all i really want displayed is the last text on the RIGHT column?
here's what I'm doing. I'm putting together a program that will allow employees that work under me to all submit shift reports in the same format instead of getting multiple different formatted text files.
I have a list box that they add "actions" they've performed throughout the day. It's populated by a combo box and some text boxes.I've got it all functioning minus one aspect...
[Code]...
Here's my problem... it's only outputting the FIRST set of items. The "Upgraded" accounts all list but the "Downgraded" and "Canceled" are not there.In a perfect world, I wouldn't ever need to worry about "Canceled" or "Downgraded" but... the world isn't perfect so,
