I am trying to make a VB application that can read and write at excel or at SQlite db.With the excel my application works fine, but when i tried to share my application 1 of my friends can open it and all the others no.So i want to try with the SQlite but i dont know what i need for to support the sqlite at my VB project.I am using VB 2010 but i can also i can use C#?
View 8 RepliesI have an excel database with one column and thousands of rows of "number" data. I need to import the data into my form read the first entry, run an algorithm then move the result to the second column then move to the second entry and so on. I am having issues with where to begin. I am able to convert the excel database to a text file if it makes it easier.The algorithm that needs to be ran consists of reading each character one at a time and is as follows:ENTRY example: 12358458754The characters 1,3,8,5,7,4 need to be summed then multiplied by 3. These are all the characters starting with the first one and skipping every other one. I will call them "odds" (not referring to numeric value)The characters that are skipped, I will call them "evens", need to be summed together then added to the result of "odds".
View 20 RepliesDoes somebody have experience in populating excel and word documents from .net application?
What is proposed way: jet, com, xml? Is there any preferred way from Microsoft side?
What would be pros and cons for all 3 approaches?
I'm converting older VBA code to VB. I'm using Visual Studio or VB 2010 but am new to this "oop" approach and not a seasoned programmer. Scenario:
1. Open new Excel worksheet (see below - will this work?)
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I have Excel file (.xls) with objects (graph, combox...) and I must open this dokument write some data and save copy.
I was tried some .dll's and everything gone fine only I lost objects.
I use a code like this which perfectly works and creates MS Excel files so I can create Excel files and save my data into it.I also use a similar code to read the data, however, it only read and writes Excel 97-2003 files, and does not support Excel 2007 file format![code]...
View 2 RepliesI use a code like this which perfectly works and creates MS Excel files so I can create Excel files and save my data into it.I also use a similar code to read the data, however, it only read and writes Excel 97-2003 files, and does not support Excel 2007 file format!Do you have any suggestion on this?
Code:
Dim ExcelString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + FileTextBox.Text + ";Extended Properties=Excel 8.0;"
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I am reading an excel file. When everything passes the edits, it is then written to a database. However, if any cell in the row fails an edit, I would like to write a new worksheet (called Errors) containing all of the information from the row which failed.
View 2 RepliesThis code is to write text to excel 2007/2003 and also read from excel file.
Reference also need to be added, but Microsoft Excel 10.0 Object Library is ask, and my machine only got Microsoft Excel 12.0/5.0 Object Library
I not able to make it....
Imports
Excel = Microsoft.Office.Interop.Excel
Public Class
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I have a VB.net 2005 app using the Microsoft.Office.Interop.Excel.dll version 11, deployed on a number of XP machines with Office 2003 installed. On one and only one machine I get the following error:Error -2147467261 Attempted to read or write protected memory. This is often an indication that other memory is corrupt.The line which triggers the error is:
xlSheet.SaveAs(strPathXLS)
xlSheet has been previously defined by
Dim xlSheet As Microsoft.Office.Interop.Excel.Worksheet
This should save an Excel file in a folder on the desktop. I can save a file from Excel in that folder, and create a new Excel file in it from the right-click option. The app is working correctly on the development machine and at least 8 other XP boxes on site.All Office and dotNet 2 updates have been applied.Office and dotNet have been uninstalled and reinstalled to no effect.
I am trying to read two text files and write in differents tabs.
Code:
Dim xl As Object
xl = CreateObject("Excel.Application")
xl.Visible = False
Dim i As Integer
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I'm trying to read a BLOB from a SQLite Database.
View 3 RepliesI bet someone already asked this but i cant seem to find it. Ok i need is a global settings that can be updated which will affect all users. I was using xml files in the program filestill now and I need to get around using this because the files can be delete or over written incorrectly. I started using the settings option and realized application level is read only and i cannot use user scope because then it wont be global settings. Is there an alternative to this.
View 5 RepliesI'm trying to get my application to read to and write from an Access database. I am running Windows 7 x64.
If I disable UAC, I don't the error. If I have UAC enabled, then the error occurs. Here is a screen shot of the error:
I'm creating a VB.Net application that stores data in a SQLite backend. The data comes in excel workbooks that the user can import from. Each workbook has one worksheet (about 30,000 rows) that gets reformated a bit and imported to a new table. What's the most efficient way to do this?
I'm currently reading in the entire range from Excel into a 2D array. Looping over the rows in this array and adding each row to a long SQL statement that gets executed every thousand rows. But this is painfully slow both on the looping through the array bit and the pushing to the SQLite step.
Code below:
'First open the xls reformater book and read in our data
Dim xlApp As New Excel.Application
Dim xlWorkBook As Excel.Workbook
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I have wrote an Application for a organisation and they had let the app run in their lan using Samba, it worked perfect. Now they want to work over the internet.The Problem is that I have written this app with Sqlite, that means its currently working so:They have a exe and the sqlite dll and the sqlite database on their samba server and they connected a network drive on their windows pc to run it. So that means every pc is writing over samba to the sqlite database.
I tried it over the internet, but like i thought sqlite is a local database and its very slow, even if the ping is under 50ms. I could create a tcp server, that handles all and writes all to the sqlite database, but I have already written around 20.000 code lines for the project, so that would be not the best option for the lazy me. I have used only one sqlite class in my client for querieng, so I thought that it could work without much work, if i would replace the sqlite database adapter with the mysql database adapter, since sqlite has nearly the same syntax then mysql.
Is there a simple sample for read and write to MSaccess from vb2010?I like to display one field of the database in a text box and write to a field in a table whatever I type in the textbox.
View 11 RepliesI'm trying to use XML more often in my apps, but somhow I just can't get it. Examples on the "net" are somehow unclear to me.
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I need open excel sheets in an application write in VS2008 (VB.NET) and Windows 7 as OS. All seem work fine, but I don't see excel worksheet. I see Excel32 opened as process, but no window on my screen. The code I used id this:
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I have this gamepad: [URL]I want to write a small application that is able to read what button is pressed on the gamepad.I've seen this thread:[URL]but this does not read the input of the controller, it only initialize it.[URL]
View 7 RepliesI have an excel file which is auto generated by third party software..and its readonly file and its data constantly keep changing online. Now I want to use or read that data in my vb.net application whenever its changes take place in excel file automatically.
View 1 RepliesThe code below allows me to write a single line to a textfile. Id like to be able to open an entire textfile into a textbox, be able to edit said text and have it automatically write back to the same textfile.
Private myCoolFile As String = "C:UserskevinMy Documentspasswords.txt" '// your file.
Private myCoolFileLines() As String = Nothing '// String Array to read File Lines into.
Private sTemp As String = Nothing '// temp String to be used as needed.
[code]....
We are trying to communicate between our two applications, One is in VB.Net and the other one is in ruby. We can easily communicate between two .Net applications but how to communicate between a .Net and ruby application? [code] After creating the Memory Mapped File through the above code how can we read/write it in ruby?
View 1 Repliesread/write from VB.Net to ruby application and vice versa using Memory Mapped Files?
View 3 Repliesneed to know exactly how does the API functions Read/Whrite Process works. I'm so confused while working. I know that I have to work using something like sectors. But I don't know how. Can someone give me an example. I dont know hoe to do it. for an example, for you to give me. Create a basic programa with a button and a textbox the button searchs what is in the textbox in a process memory. Search the title of a program for example.
View 2 RepliesI've been scrambling my brain to figure out how to access my FTP server thing to get a list of text files in a folder and to edit the contents of those files online.
View 1 RepliesI've been scouring Google looking for a solution to my problem, but I can't seem to find anything so thought you guys might know a way of solving my problem.Im writing a little program which needs to change a few different memory address variables of a specific process.Does anyone know how first of all I can detect if the specific process is running on the user's machine, and then how I would read the value of the memory addresses, and write to them also.
View 3 RepliesBasically, i have to write a small application that just writes in certain cells of a set page of an excel sheet, the sheet will always be the same layout.
View 2 RepliesI'm gettiing this error from my app: "Attempted to read or write protected memory. This is often an indication that other memory is corrupt." But it carries on for about 5 minutes then stops. The application log shows this:
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I have recently decided to give .net another chance, but i have a few questions about it before i get really into it. RE: Files, I use random access files to store data as opposed to databases (namely i don't see the need for a database for storing so little information(records <200 max) knowing that it is an older system and less "cool" i don't care...) Will vs2010 express read, write to random access files? Would it be done kind of like vb6 (which is my current vb version)? I will be needing to print the text of rich text boxes, is vs2010 express capable of doing this?
View 7 Replies