Open A Csv File Which Contains 4 Fields And Many Rows?
Mar 3, 2011
What I need to do is open a csv file which contains 4 fields and many rows, then I want to do different operations determined on the value in the fields.
for example :
My CSV will be in the following format.
ID,Name,Number,Status
Heres what I have so far
Private Sub OpenFileDialog1_FileOk(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles OpenFileDialog1.FileOk
[Code].....
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Aug 25, 2011
I have a csv file. I need to open it, delete whole row on basis of a column value, Update few of the column values and save the file as .dat file. I am using VB.net 2010
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Dec 19, 2011
I'm trying to insert a couple of fields into a csv config file and then update all other rows in the file at the same index by copying the previous 2 entries. I'm reading through each row and converting the row into a list(of String) because it seems to be the most flexible way. Ine initial insert works fine, but the code below doesn't. The actual insert code is:
[Code]...
pcIndex is the list index value from elsewhere in the code at the insertion of the 1st of a pair of values into one row. I need to update that index point and pcIndex +1 in all other rows. However it's not doing anything. Tried using lstSteps.Insert, InsertRange, etc. Am I using this right? Is there a better way? It seems to be over-writing the entry rather than inserting a new column and moving the others up, so it appears the list capacity value isn't updating - so I'm left with the initial row with 4 more entries than the others sticking out of the file.
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Apr 1, 2009
Assuming this schema:
Table1 (Col1 int, Col2 str, Col3 str, ...)
Table2 (Col1 int, Col2 str, Col3 str, ...)
[Code]....
I need to select all records from Table2 where there are NO records in Table1 having matches of both Col2 & Col3. For instance, Table 2 records where Table1.Col2 <> Table2.Col2 AND Table1.Col3 <> Table2.Col3.
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Aug 29, 2010
In the previous reply, you showed how to open a CSV in Excel. How does one determine the number of rows and columns that were imported?
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Jul 9, 2009
I have read the file I/O tutorial and I learned alot. My problem is I need to send several different txt fields at one time and each into there own file. This was simple in vb6 using something like below, I have no idea how to do this with .net. Also on start up I will need to read this information back into text fields.
Code:
Private Sub Command1_Click()
'Save command1 name to file
Open App.Path & "subD.cab" For Output As #1
[code]....
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Nov 14, 2011
I'm currently refactoring an old Visual Basic DLL (VB.Net), which stores all of its data in one module called Globaldefinitions as public fields. There are about 200 fields, referenced thousands of times all around the code:
Public Module Globaldefinitons
Public a As Short
...
Public zz10 As Double
[Code]...
I need to change the module into a class with non-shared fields. This means, each and every of these thousands of references needs to reference the instance of that class:
globalDefinitionsInstance.a = 5
How do I go about this efficiently?
Regular expressions operating on the source fall flat. Refactoring tools like Re-Sharper or CodeRush don't seem to offer this functionality. Visual Studio 2010 cannot do it automatically either.
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Jun 19, 2011
Class Foo
ReadOnly name As String
Public Sub New(name As String, dependentUpon As Foo)
Me.name = name
[code]....
The output of New Bar() is:
Dependent created. Dependent upon nothing.
Independent created. Dependent upon nothing.
It seems fields are initialized in the same order as they appear in the source code, which (a) leads to an unexpected result, and (b) seems a little puzzling, given that one is normally not permitted to read from uninitialized variables in .NET, yet that seems to be working fine above.I would've expected VB.NET to be smart enough to initialize referenced fields first, and only then those that reference it; i.e. I'd have liked to see this output instead:
Independent created. Dependent upon nothing.
Dependent created. Dependent upon Independent.
how to get VB.NET to behave like that instead, without simply having to swap the declaration order of dependent and independent inside class Bar?
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May 27, 2012
I'm trying to create a table in Word using data from a table in Access. There are four fields in the access table that I need. 3 fields are text which I can populate the Word without any issues. However the fourth field is a memo with >255 characters.I'm struggling to come up with the proper code to allow me to populate the Word field with the memo data that has more than 255 characters. The code I have so far is listed below. But when it hits the memo field, it crashes on the line I marked with **. I know it's not text, but I've tried many different field types, but nothing has worked so far.[code]...
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My intent is to have the code - on a button.click event - check the Username and Password fields and return an error depending on which is wrong. Or if both are wrong, return a different error message. I've set the username as parts and the password as parts (still learning how to use external authentication). [Code]
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Why would a .sln solution file open and appear empty in Microsoft Visual Basic 2010 Express - i.e. no windows showing projects and code files etc.When I inspect the file in a text editor, it contains references to vbproj files (which are present) which indicate that it should not appear as empty.No error messages are reported when the file is opened.
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Feb 11, 2009
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Dim xlApp As Excel.Application
Dim xlWorkBook As Excel.Workbook
Dim misValue As Object = System.Reflection.Missing.Value
[code]....
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Nov 18, 2009
how to use open file dialogs to open a file to a text box?
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Aug 7, 2011
I've noticed that when you click on a web page in Windows Explorer, or open a file in general, and the default application to open it is internet explorer, ie opens and opens the file. However, when I tried this on my Web Browser it opened, but ignored the file and went on its usual routine. How can I get my Web Browser to open and open the file that was clicked on in explorer?
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Apr 28, 2011
I saved a file with the extension .doc. I use the RichText to write and save the text. I did not set any encoding type when I saved it. When I tried to open the file in the Richtextbox again, I got all the formatting characters in the RTF file. How do I correct this? How do I open and re-open a .doc file in the Rich Text box control without the formatting showing up in the box with the document contents?
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im having a slight problem with my open file dialogue box, i need to be able to open the dialgue box, and click the file and open in my pdf reader, or at least load it to my other form ive created. what ive go so far:
[Code]....
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Feb 11, 2010
I had this code working to import one column in a table as a starter point, but now that i'm trying to import all the columns in the table, i'm running into problems.
When I run the app, I get this Microsoft . NET Framework error:
Syntax error in INSERT INTO statement
I've tried just about every combination I can think of for the sql statement and still the same error message.
Imports System.IO
Imports System.Data.OleDb
Public Class Update2
[Code]....
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Oct 30, 2008
I need to create a PDF drawing of our products with dimensions filled in, based on template files. After the user selects the proper template file for the desired product, a window should pop up that prompts the user for the necessary dimensions, such as width, length, etc. Then the program would fill in all the fields on the template form with the proper values. Some fields would just be filled with the exact values that the user enters in, but other fields may require a calculated value based on the entered values. ie. Overall width = nominal width + 6. So somehow I need to figure out how to make the template hold the equations. Can anyone offer me some guidance on how to make this work the way I described? Can iTextSharp determine if a PDF file has fields in it? Can it loop through all the fields & get the field names?
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[Code]...
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private void OpenMyFile()
{
string path = GetPath() + ViewState["fileopen"];
[Code]....
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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.
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experience on how to create an engine using C# (VB.NET is okay too) that is generic enough to handle most cases of MS Word text fields I need to fill with data I'm getting from a database? In short, I'm about to embark on this little Office automation excursion and I'm hoping a little bit of feedback here.
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[Code]...
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I need to import a big fixed width text data file into SQL server. Before importing, how to determine how many fields and records in the file?
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