Reader.read String As Variable?

Apr 16, 2009

I have a function that queries the server to add items to a drop down list. Here is the excerpt in question:

While reader.Read()
With f.items
'f is the drop down list object

[Code].....

I want to be able to use this same function over and over to populate all the drop down lists for the whole page, but am getting the error "column g.tostring not found". How do I get this to be handled as a variable string?

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Variable Error "Variable 'reader' Hides A Variable In An Enclosing Block"

Aug 23, 2011

I receive the error -

[Code]...

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Invalid Attempt To Call Read When Reader Is Closed (While OleDbDataReader.Read)

Sep 1, 2009

There are already multiple threads about this, but i don't have the knowledge about the different SQL databases/methods to make heads or tales from it.I am using an OleDbDataCommand, an OleDbDataReader and the following code

Dim Query2 As OleDb.OleDbCommand
Dim RetVal2 As OleDb.OleDbDataReader
Query2 = New OleDb.OleDbCommand("Select [section], [title], [id] From " & DtSections & " Where [volume] = " & volu & " And [chapter] = " & chapter & "", AccessConn)

[code]....

value)In order to evaluate an indexed property, the property must be qualified and the arguments must be explicitly supplied by the user. Type) Object?

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VS 2008 Read Text From File And Save To String Variable?

Dec 6, 2010

How do I read all the text from a text file and save it as a string variable? For some reason I remembered it being something like this: IO.FromFile.ReadAllText("path") but thats not it.

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Use XML Reader To Read It As Its Quite Large?

Mar 6, 2009

I have following XML structure, how can i use XML reader to read it as its quite large.[code]...

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Choose Specify Data To Be Read By Sql Reader?

Aug 16, 2010

I have the first form and create 5 checkboxes which are connected to my db. Whichever checkbox is checked and the value will be inserted into the db (value: 1; data type: tinyint).And now, the second form will pull out the data base on the which checkbox is checked when the button is clicked. But for somehow i got stucked at the following code.

The first form:

Dim nValue As Boolean
If chkbox5.Checked = True Then
nValue = 1

[code].....

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Invalid To Read When Reader Is Closed?

Jun 9, 2011

i am getting an error like invalid attempt to read when reader is closed

[Code]...

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Stream Reader To Read .txt File

May 16, 2009

Radio button 2 beacuse there are 3 and you have to pick one (The right one) to advance on to the next form.

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Using The Stream Reader To Read Web Files?

Jul 2, 2009

Is there a method of using the stream reader to read webfiles?

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EID SDK - See If Card Inserted Into Reader Then Read Out Data

Mar 14, 2010

I am trying to use the eID SDK (for using the belgian ID-card) in VB. It's supported but I can't get it to work. I have never worked with sdk's before. I did manage to get it to work in c++ in console but I really need it in visual basic. Also the VB examples that come with the sdk are made in an older version of visual studio and when my version tries to convert them they don't work. I want to use the sdk to see when a card is inserted into the reader and to read out the data. (both i got to work in c++ console).

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Read From Multiple Tables In Data Reader

Mar 18, 2010

I'm trying to read from two tables in mysql:

[Code]...

Or even other techniques on achieving the goal of reading data from two tables using data reader? This is a winform, not a web form

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Read Text File Through Stream Reader?

Apr 30, 2012

I have a text file name list.txt which contains data like following;

AC-No. Name Time State New State Exception
100 ZULFIQUAR 09/04/2012 01:53 PM C/In Invalid
100 ZULFIQUAR 10/04/2012 01:39 PM C/In Invalid
100 ZULFIQUAR 11/04/2012 01:38 PM C/In Invalid

[Code]....

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VS 2005 : Read Web Page Using Stream Reader?

Oct 19, 2010

From few days I am doing efforts to read web pages using webbrowser control in my desktop application. But it is very slower than my expectations(because I want to read lots of pages in minutes and browser control reads almost one page in 5 to 10 seconds), what I need is to read two or three tags written in web page.

So finally I decided to use something, which can give me only source code of page. I think StreamReader will help me to read it. I am not sure if it is flaxible with my purpose, or something else is there which can give me only html source code of web page.

I have written this code to read html code, but it gives error.

Quote:

System.ArgumentException: URI formats are not supported.
public static string Navigate(string URL)
{

[code]....

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Search A String Variable And Place The Match Into Another String Variable In Visual Basic?

Nov 18, 2009

I'm looking for a way to search a string variable for two words and copy the text in between them into another variable. This needs to be done as many times as the match occurs.

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Does Reader Just Read Numbers Added To Buttom Of Bar Code

Jun 21, 2012

I my small application to read bar codes. url...

1. Code do you code to read what this scans.
2. Does the reader just read the numbers added to the buttom of the bar code? so with that i could look an item up in a database?

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Invalid Attempt To Call Read When Reader Is Closed

Dec 23, 2011

I am gettting the following 2 errors:

Invalid attempt to call Read when reader is closed and sometimes Invalid attempt to call MetaData when reader is closed when attempting to read from a sqldatareader object. What I want is to list groups in listview. The last column is "Total Numbers".[code]...

It works ok for the first row but after that the first error generates. I don't want to include the COUNT function in the main sql cos then i would be required to group the rest fields (there are 9 of them totally). I tried MARS but it don't work at all in my connection which is like

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Invalid Attempt To Call Read When Reader Is Closed?

Mar 31, 2011

"Invalid attempt to call Read when reader is closed." is returned when trying to use a SqlDataReader in a Thread or BackgroundWorker (Do While z.rdr.Read() in the bold sections - I know this code does the same thing twice....). I have looked at a few forum posts but I did not find a method to keep the SqlDataReader open when passing the arguments. How do I thread the SqlDataReader loop?

[Code]...

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Stream Reader And Writer - Read Data From A File

Jan 27, 2009

I am trying to make my application read data from a file. Then save the data back. However I keep getting an error which says the file is still open so cannot be edited. I also read that there is an issue with the streamreader and streamwriter do not close the program straight away. I was wondering if anyone had a way around this or any alternative ideas. Heres my code so far!

[Code]...

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IDE :: Passing Variable At Runtime To Data Reader In Visual Basic 2010

Aug 21, 2011

I'm trying to retrieve a record from access database on the basis of a string variable.

here is the code

Dim val As String( "kent")
Dim comm As Data.OleDb.OleDbCommand
comm = New Data.OleDb.OleDbCommand("select DISTINCT M_DATE_P from MACHINE_P where M_MODEL=" & val, conn)

i want to pass val variable, so that i can retrieve data at runtime.

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Find A Program That Can Read Data From A USB CCID Card Reader?

Oct 14, 2011

I have been looking all over the net trying to find a program that can read data from a USB CCID card reader.
after several hours and several pages of useless info i thought maybe there is a way i could create a simple progeam in VB to read the data, so i started another long search for info also to no avail.

Does anyone know of anything like this or if its even posable?

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Using Stream Reader To Read Some Text(txt Format) And Show In Textbox1?

Mar 8, 2012

I'm using stream reader to read some text(txt format) n show in textbox1. I want stop at the second last line to get the string.Below is my code:

path="c:dic.txt"Dim reader As New StreamReader(path)Do While reader.?? //how to instruct to stop when read until second last line,because i don't know how many lines in the text file??

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Using A Data Reader To Read An Excel Spreadsheet And Want To Update A SQL Express Table?

Mar 10, 2009

I am using Visual Studio 2005. I am using a data reader to read an Excel spreadsheet and want to update a SQL Express table. The datatypes in this table mimic a software application I will eventually be passing data to and are listed in the comments in my code. No matter what I do or change, this will not run. I even populated my spreadsheet with zeros and this will not run. I have found many suggestions on the web and tried changing things but nothing seems to work. I also don't know specifically which variable is causing the error or the proper way to make sure there are no blanks in this spreadsheet.The error says "conversion from string "" to 'Double' is not valid Here is my code:

Public Sub btnUpload_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpload.Click
'Connect to the Excel spreadsheet
Dim xConnStr As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=" & txtFileName.Text & ";" & _

using a data reader to read an Excel spreadsheet and want to update a SQL Express table

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How To Read Numbers From A File Into A Variable To Be Be Used For A Function Then The Next Line To Be Read

Oct 24, 2009

I have created a program that saves the co-ordinates of the users mouse and saves it to a text file to be used as an auto clicker.

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Using XML Reader To Capture A String

Feb 15, 2012

I am using XMLReader to look thru and XML file that I have. While I have been able to play around with it and get it to pull some of the information I want, I am wondering what commands to use to do what I really want.For example, I really just want one line of information in the XML File. it uses tags for the name of a string that follows it, heres an example,Serial Number1234567890...this format is used for other parameters also, but I just need the actual string of serial numbers. Is there a way to tell the reader to search for "Serial Number" and then read back the next line, which corresponds to what I want.Just so you know I have been using the reader.name command to find string tags which is great, but there are 4 in the file im looking at, I just need the one that says "Serial Number" as its content.

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VS 2005 File Reader & String Manipulation

Feb 2, 2010

a text document containing information as:In/memory of/wendy/smith 6th of march 1545/ foreever in our thought/love liz and pony/i`ve got to develop a software in vb that will read the text file above and extract names, date.for each inscription it is required to display on a computer screen, IN TABULAR FORM, the details mention above.

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Launch An Application Called Foxit Reader Pdf Reader?

May 18, 2011

I want to launch a application called Foxit Reader pdf Reader .I know System.Diagnostics.Process.Start(path) can do it but . Requirements are Foxit Reader should be installed on machine.Now if it is installed how to serarch for the path of its Executable to provide the parameter as I can not hardcode the path for different machines.

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Printing A PDF Using FoxIt Reader Or Adobe Reader?

Feb 28, 2012

I am having an issue with both Adobe Reader and FoxIt Reader when trying to print a PDF document. Both issues are different but a solution to either one will allow me to fix my issue.The issue I am having with Adobe Reader when trying to print using the following code is that it will not print it to the network printer I specify but just the default printer.

Dim AdobeReader As New Process
AdobeReader.StartInfo.CreateNoWindow = False
AdobeReader.StartInfo.Verb = "print"

[code].....

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Query Return Value - Getting An Error In Runtime That Is "Invalid Attempt To Call Read When Reader Is Closed" ?

Aug 31, 2009

I have an error that is during the query to a database ExecuteReader 'phase' of my program, i am assigning an .OleDbDataReader to a variable RetVal and then, i am giving this RetVal = Query.ExecuteReader, and then in the while the query is being read loop(While RetVal.Read) i am getting an error in runtime that is "Invalid attempt to call Read when reader is closed." I know this means i have to open the reader, but i don't know how to do this, as i have been using this process for a few weeks and haven't had this error pop up. (and i have managed to use the while loop)If you're not living on the edge, you're taking up too much room

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VS 2010 Merging An Integer Variable With A String Variable?

Jun 2, 2011

Say I have something like this

Dim Level1 as Integer = 83
Dim Goal as String
Goal = InputBox(" What level is your goal?")

[code].....

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Read Smart Card Data Using Card Reader?

Dec 23, 2009

i want to read data from smart card using card reader.i need vb.net code help as well as total process that mean what dll/exe will be needed and how can i determine that the card is inserted or ejected from card reader?

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