I have successfully run a simple sql query in vb.net and basically wanted to know how I can export the results from the query to a .txt file? All I really know is that I should be using StreamWriter. "SELECT column1, column2, from table1 where column1 = '1'" to a .txt file? Would it be best to first bind the data to a grid or can I skip that step?
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I'm trying to write a CSV file with multiple fields. The data to be written is stored in a list(of string()). Using VB Filewriter.Write for each field, the process is real slow. Isn't there a way to format the data first and use Writeline once for each instance in the data store? Unfortunately, when I created a string with all the fields concatenated and separated by commas, the Writeline inserted quotes around the whole string. How do I prevent this behavior?
View 4 RepliesBasically all I need is my program to write a character(Ex: "1") in a certain position specified by me in a line in a textbox.
So so far my code is:
Dim sw As IO.StreamWriter = IO.File.AppendText("101.txt")
sw.Write()
And all i need to know is how i pick the position that the .write function writes.
how to take a query that returns a single row of data and load that data into textbox controls.I know about ExecuteScalar but it is only good for a single column of data from the query.
View 2 Repliesencountering a problem when trying to write data to a text file. If I put the output into a messagebox I can see it, but when I attempt to write it to a file it is just blank. What am I missing here? EDIT - This is just a simple winform that I specify a path to a local HTML file in Textbox1 and I'm attempting to parse some HREF tag data.
Imports System.IO
Imports System.Text.RegularExpressions
Public Class Form1
[code]....
I have a code which reads a text file through streamreader,selects what is important and writes the same to another fileusing streamwriter. The problem is that the streamwriter stops writing beyond a certain line and just doesnt write ahead.What can be the problem? Do I have to make two seperate files?
View 9 Replieswhy if I use StreamWriter .WriteLine, 001(zero,zero,one) is converted to 1? how Can I write in a file 001(zero,zero,one)? [Code]
View 7 RepliesI need to update the students score with a new score but I cant get it to write to the line that the students current score it at. It just deletes the whole text.
Alex,letmein,0
David,qwerty1,0
John,password,0
[Code].....
I have a Windows Forms application that is filtering out Visual Studio solution files.
I have the code thus far to search and find the correct files and to differentiate between VS2005 & VS2010 solution files.
Now I need to write/save these files so that I can retreive them all from the same location. I need to use Streamwriter but am not too sure how to code it.
I have included my source code so far and code for the Streamwriter write and save?
[Code].....
I am trying to read the content from a .csv file and storing it in a variable. Later I am writing that content into a newfile. Code is executing successfully but the data is not appearing in new file. Here is my code:
[Code]...
I have the following code, which I run everytime I want to add a new line to my text file, but it is deleting the previous data in the text file every time I do it.
Dim stFilePath As String = "C:file.txt"
If File.Exists(stFilePath) Then
Else
File.CreateText(stFilePath)
End If
Dim ioFile As New StreamWriter(stFilePath)
ioFile.WriteLine("{0}: {1}", DateTime.Now, "test message")
ioFile.Close()
i need help with stream writer, i can get it read lines and stuff like that but now i need Streamwriter to write to a colour.txt file (already populated with data) and insert a line that isn't already in the file, into alph order eg combobox reads and displays list from txt file.
their is a colour thats isn't in the text file, so i would like it to take the colour from the combobox that was typed in by the user and place it into the colour.txt file in alphabetical order (these are car colours so their are 100's and 1000's per manufacturer, its not as basic as i want red blue black lol) i was able to find loads of data about streamreader but not so much about stream writer
I have thios code that will load a php file (text file) into a sting via streamreader then its supposed to find and replace a portion of the text and write the changes back out to the file via streamwriter. I put my code together and after running it look at the file and it's unchanged. After looking closer it appears the problem is the find & replace operation I am doing on the string. Here is my code:
[Code]...
I am taking in two html files and creating one out of them. To do this I am opening the first html file and not writing out the closing </body> and </html> tag and opening the second file and not writing out the corresponding opening tags, as well as the <style></style>section. I start a streamwriter, and write the lines out to it, and then close the streamwriter. My problem is that the output file is filled with strange characters. I've tried opening the streamwriter with different character sets as the third parm, but all this does is change the characters to different strange characters.It says charset=windows-1252 at the tops of the input files (and the output files for that matter - since I'm just reading stuff in and writing it out - with the exceptions mentioned above).Questions;First, do you think I am properly approaching appending two .htm files together?Second, how can I eliminate these strange characters.
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I have setup an OleDbConnection and my query works just fine but the problem I am facing is that I want the entire query not just a certain row or column. I also would like to place this entire query into a blank excel spread sheet.[code]
View 1 RepliesIf this is in the wrong section, I have a program that queries a database and puts the info in a specific format in a txt file. Now my problem comes w/ how to format the date.
Should I format the date in the SQL query OR is there a way to take the result from the query and format sometime before it is writen to the txt file? I'm not exactly sure how to do either. Would I need a subquery to get the desired date format?
[Code]...
I am using an access DB and wanted to create a query that returns user's in the db. First I need to check the db to see if it is empty. Then I need to check to see it my query returned any values. How do I go about doing this?
View 6 RepliesI'm a bit confused on how to grab query results. With VBA i would open a record set and have the results of the query written to that recordset. IN VB.net how can I grab the query result and throw each column into specfic arrays?[code]Now how would I force it to query my DB? I have a connection established already.After the query how can i play with the columnes and place them into arrays?
View 2 RepliesI have used linq quite abit but was just wondering how to append the results of two IEnumerable(of X) together into one IEnumerable(of X)
View 4 RepliesI had this query sp_msforeachdb 'select "?" AS db, * from [?].sys.tables' when I execute it in sql server, it return multiple results. How I can read all the results in my vb?
View 2 RepliesI have the following code in my program: Dim empenrollments = From enroll In db.EnrollmentSummary(eid)
Select New With {.Name = ename, enroll} Dim elist = empenrollments.ToList returns this error
In the following lines, I have to get each row in the returned results and add it to a DataTable, but it never gets there.
[Code]...
I am familiar with the VB6 ADO way of dealing with SQL queries and looping through the record set results.
However, what is the correct way to query a server, cycle through the results, and dispose of my query in VB.Net? All the ways I have been using seem to be unstable and crash randomly.
I have been using the following code:
Public Function GetSQLTable(ByVal strSQL As String) As DataTable
Dim table As New DataTable
Dim adapt As SqlDataAdapter
[Code].....
I am learning VB.NET and wanted to try and connect to a Oracle.DataAccess with this simple SQL Query but am stuck how to get my results.
Imports Oracle.DataAccess.Client
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click[code].....
I'm trying to get the results of a WMI to display in a datagrid however the code executes without error yet the datagrid doesnt show any output
Try
Dim scope As New ManagementScope("\" & servername & "
ootMicrosoftDFS")
[code].....
I'm trying to execute a SQL query and pull the results into a text file. However, I'm getting an error in the bolded part. I think probably the biggest help would be an explaination of what the code in bold is actually doing. I pulled this from a book but don't think I completely understand. To me it seems like its saying that for each row in table 'extract'. Extract it, and write it?? But it doesn't seem to work that way. When it gets to that part, the error I get says that the row doesn't exist in the table
Private Sub btnExecute_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExecute.Click
Cursor.Current = Cursors.WaitCursor 'hourglass cursor
Dim connection As New SqlConnection
[code]....
I have a query using LINQ-to-SQL. It queries an underlying database table Rooms. It uses Where conditions to narrow down the results, namely:
Gender.Current Occupancy < Max Occupancy Available Flag is Checked I know this should return results but it keeps returning an empty set.Code is below
[code]...
UPDATE: I've verified that the issue is with the statement where sh.is_available = 1, which doesn't make sense since this is a bit field.
Why would a VB/ASPX page not return results for a query which runs fine with other Oracle clients? (Same username) The following code should first output the query and then execute it outputting a single exclamation point per record. However, it outputs the query (as it should), but does not return any rows (nor error). If I copy the query to SQL Plus (or other editor) as the same user, the query returns results.
Why might my code not output any results?
Dim MyQuery As String = "...some query..."
Dim Factory As DbProviderFactory = DbProviderFactories.GetFactory("System.Data.OracleClient")
Dim myConn As DbConnection = Factory.CreateConnection
Dim myCommand As DbCommand = Factory.CreateCommand
Dim MyReader As DbDataReader
[Code]...
I am getting stuck on this problem. It seems simple but for some reason im having trouble.
Here is what I have of the following:
Try
cn = New OleDbConnection("Provider=microsoft.Jet.OLEDB.4.0;Data Source=G:SeanBMSBonder3_0.mdb;")
[Code]....
This works to get only one of the values. Actually the last. how can i get all of them?
I have a basic question about using a database with Visual Basic.I'm using a OleDb connection. I have dragged and dropped editboxes from the DataDource view. This automatically places the table navigation- bar on the form. When I run it this works fine.However I want to be able to search within the table, with an SQL statement.How can I connect the results from the SQL query to the navigation bar,such that the editboxes automatically take the values of the record without having to assign every textbox manually?
View 1 RepliesDatagrid with results form sql query
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