How To Retrieve Data From CSV / TXT File Using OLE DB
Jan 4, 2010
I am retrieving data from a csv/txt file using oledb driver
ConnString = "Provider=Microsoft.Jet.OleDb.4.0; Data Source = " & System.IO.Path.GetDirectoryName(strFileName) & "; Extended Properties = ""Text;HDR=YES;FMT=Delimited"""
strQuery = "SELECT * FROM [" & System.IO.Path.GetFileName(strFileName) & "]"
In the last line I am getting following error if the filename is large
Is not a valid name. Make sure that it does not include invalid characters or punctuation and that it is not too long.
My question -
Is there any limit to filename or the select query or there is some pattern which I need to follow?
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Jul 14, 2009
I have an asp.net/vb file that receives data and processes it via a stored procedure. The code had the width set to 2 for the year's varchar, so it was chopped, leaving only the first two digits to get inserted into the db.Is this info possibly retrievable from a system/IIS log file or is it lost forever?
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Jan 22, 2011
im parsing an .xml file to retrieve movie data.[code]i use a contains method in the query but it doesnt like [code] I thought when i use .contains method that it would select the title regardless of the :, but i yeild no results.ive check the .xml file and everything is fine.[code]my code works fine with all other titles that dont contain any special characters.
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Apr 11, 2012
I need to store/retrieve a bit from a data table of 3.268.760 bits long.
Using w As New BinaryWriter(File.Open("test.bin", FileMode.Create))
for x = 1 to 3268760
For i = 1 To 3268760[code]....
the w.write(?) stores a boolean value meaning 0/1 for false/true values, but Vb.net seems to use an whole byte to store this data which is too expensive for my table (3.268.760^2).Is there a pratical way to store/retrive single bits from a file using vb.net? (meaning as little as possible conversion to other types).
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Jun 10, 2011
i want to retrieve data from text file and save it to sql database bt i just have to implement some conditions like if there are 3 entries exists in text file with the same ID but i just have to get only 2 of them so in what manner should i write the code....
Dim sbIDs As New System.Text.StringBuilder
Dim sbPunchDateStamp As New System.Text.StringBuilder
Dim sbPunchTimeStamp As New System.Text.StringBuilder
[Code].....
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Feb 15, 2012
I am making a simple application that will be able to store competition data into a text file that I have given a custom extension to on saving. Here is an example of the format that i have saved the data in.
[Comp_Name]Test Competition[Comp_Name]
[Location]Silverwood Lurgan[Location]
[Type]Teams[Type][code].....
When i open the file, i want to redisplay the data in separate text boxes. Later on in the project i want to be able to search within the file for headings for example;
if "[Heat1]" is present then get all text between [Heat1] and [Heat1]
i am currently able to use the streamreader and open file dialog to retrieve the entire string of text fromthe however i am not sure how to go about getting the text between the headings I have used.
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Mar 29, 2010
I'm trying to build something called a structure which will store data it retrieves from a text file. I have the structure set up like this:
Structure Employee
Dim FirstName As String
Dim LastName As String
Dim ID As String
Dim Hours As Integer
Dim Wage As Decimal
Dim EarnedPay As Decimal
End Structure
[Code] .....
How to set these operations up?
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Jan 29, 2010
I am using the following Select Statement to retrive data from my .csv file database:
Code:
Dim comm As New OleDb.OleDbCommand("Select *, Left([Street Full Address], IIF(InStr(12,[Street Full Address],'-')>0, InStr([Street Full Address],'-')-1, Len([Street Full Address]))) as StreetFullAddress From " &
[Code].....
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Apr 9, 2010
I have three tables in SQL server which I would like to show and access on a form. Table 1 contains account data, address, contact details etc. Table two contains data attached to a Person, tel no , Mobile no, Email etc. Table three contains details on what awards the person holds, i.e. one person can hold several awards.
Therefore I have a one many relationship between the first two tables and a one many relationship between the second two tables. This is set up in SQL
The first two tables are shown on a form, table 1 via a set of text boxes, table 2 via a datagrid control.
I would like the functionality whereby I could select a row in the datagrid showing the persons name and find the Persons_ID number then use that as a filter to a second datagrid view so that only the selected persons awards show in the datagrid.
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Apr 11, 2011
i want 2 select data from data gridview and want retrive that data into another form in to the textbox ...is it possible ? i 'm doing like this for that
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.[code...]
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Mar 11, 2010
I want to obtain the individual data in rows and columns from my database. I mean after loading the data in a data table.... I think I need some attributes of the data table, so as to obtain data from the rows and columns.
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Mar 13, 2007
how can i save 2 textboxes(string) into 1 file? and when open the file, the string goes to definite texboxes...
[Code]...
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Oct 10, 2011
I have properly configure the database connection. I wanted to get data from the database to 2 text boxes.
[code]...
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Nov 23, 2009
1. user writes he's details (textbox1 for username, textbox2 for password)
2. user hits "Login"
3. application tries to retrive data from sql server. (in this case localhost/127.0.0.1)
4. application retrieves data from test/tables/members
5. if the specified account information matches the servers data, it will let you through to the next form. Else, it will give an error that the user/pass is incorrect.
Now look, the table looks like this
[id] | [username] | [password]
1 username password
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Jul 30, 2009
I am trying to execute the code below to list the select item in a checkbox to the body of the mail
Dim CheckedValues As String
For Each item In txt_panview0_ddinput1.Items
If item.checked Then
[Code]....
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Jan 11, 2010
How to retrieve data from database using Web services on VB?
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Jun 8, 2011
I need to retrieve data in array. We are asked to get id number, name and section and put it in a array and then if we clicked retrieve button it will prompt an inputbox requesting for the id number of students and after we input the id number of the student the name and section will be in the msgbox.
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Sep 8, 2010
i created a database in my visual basic . and in this database i created 1 table...
i created also a query which is calculating the SUM of a colonm..i want to know how i can do to retrieve this data inside a textbox whos is on my program..ans of course i want that data to be update everytime i inserte data in this colonm...
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Sep 21, 2011
we want to retrieve all data in our database but we dont know how to do it.. hmm.. we just use to retrieve data one by one.. its just by the search button.
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Mar 11, 2010
I have managed to connect vb.net to Microsoft database access but now i am struggling with the code to authentication log in. when i log in to the form i want it to display the user name in the label in vb.net form.
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Apr 4, 2011
I want to retrieve data from a this link:
[URL]
I have used this code:
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
[Code]....
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Jan 6, 2011
I'll create Database in Visual Basic using MsAccess.
But I want to know that how can retrieve from Access which selected fields are needed...
For example., I've 10 fields in student mark list,
ie, Rollno, Name, ..., Grade...
From those 10 fields, I want to show only 5 Fields in another VB form...
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Dec 17, 2011
my program has a datalist which list out all the item from datasource and display the detail information on different textbox the problem happened while i click "vitamin a" from datalist, and the "supplier name"will display "daily medicine",then when i click "vitamin b", it will display "sunny medicine",finally when i clicked back "vitamin a", the supplier name still remain "sunny medicine" which mean it does not change from "vitamin b"?
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Mar 11, 2010
I have 2 checl boxes bol1 and bol2 and i stored a record after ticking one of them and now i want to make a function to retrive what i stored in the access data base in check boxs as well according to the ID. the table name is check_table and the columns names are "bol1 , bol2" the type is (yes,no).
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Mar 11, 2010
How can i retrieve data information displayed on the hyperterminal or is there any way to redirect the information being displayed on hyperterminal to a file?
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Mar 18, 2010
how to retrive thousands of data from access faster
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Jun 12, 2009
how to retrieve data from mysql using vb.net as frontend. I created database in mysql and able to insert data from vb.net but i dont know how to retrieve data from mysql.
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May 6, 2012
I am making a survey-application in winforms that is connected to a MySQL database. Now I want to show the alternatives of a question, and how many answered each question. I have a table for alternatives called tblAlt and a table for answers from users called tblAnswers.
There are only 5 alternatives for each question. Is there a way to get each alternative, and how many answered each of them with one query?
This is what I made so far, but this is definitely wrong:
SELECT tblAlt.altText, Count(tblAnswers.answerID)
FROM tblAlt, tblAnswers
WHERE tblAlt.questionID = " & CInt(questionID) & "
[Code]....
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May 15, 2009
I have a combo box on a form named cboGender, I am using a data reader to retrieve data into the combo box as follows[code]...
the value of Gender shows in the combo box if the Drop Down Style property is Simple or Drop Down. However if I set the Drop Down Style property to Drop Down List which cannot be edited, the combo box is empty.
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Feb 4, 2009
I have a dataset and inside it a dataTable. How can I retrieve the data of the datatable?[code]...
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