Ado INSERT Into Excel Works With Integers But Crashes With Doubles?
Nov 22, 2010
The following works:
string connectionString = "Provider=Microsoft.Jet.OleDb.4.0;Data Source=" + str_excelFileOnLocalMachineInReports + ";";
connectionString += "Extended Properties=Excel 8.0;";
OleDbCommand myCommand = new OleDbCommand("Select * from [pFACTData$];");
[Code]..
But as soon as I change any of the numbers to doubles (e.g. 23.32457) I get a crash (it doesnt crash on the insert, it crashes on the next one:)The INSERT INTO statement contains the following unknown field name: '23#2345'. Make sure you have typed the name correctly, and try the operation again.
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Jul 14, 2011
I am using an oleDb connection to connect to an excel spreadsheet (.xlsx) file and load the information into a datagridview. From there I hope to have it edited by a person and programmatically at runtime. However, I noticed that when I import a file that has integers in a column, it will not import any of the string values in that column. Also, It will not allow me to manually enter strings into that column at runtime - it results in an error stating: [Code]
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Jul 2, 2010
I seem to have a problem with an application i made. I hope you can help me with this as it has puzzled me for awhile now.
[Code]...
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Aug 12, 2011
Problem: The excutable of the vb program crashes when trying to run but when I step through the program inside of visual studio it runs successfully.
Details: The program performs a winscp.com transfer from a ftp server and then takes the downloaded file and extracts the data from it before sending it to a webpage. The program also decrypts a des3 encrypted file which holds the login details for the sftp server and the webpage.
My Thoughts: I was thinking this could be something to do with the excutable jumping ahead of the slower transfer and decrypt functions thus causing a "file not found" exception to be produced and the program to exit. Lending to this if I slowly (aka spend 10+ seconds stepping through the code) move through the code it works just fine.
As requested Crash Messages:(I capture everything in exceptions and exit properly so no "crash" is reported but the error I get in my logs is as follows:)
1st run with standard test case:Could not find file 'C:UsersAdministratorDesktop..ILC2INFOENC.txt'
2nd run standard case (the file above was not deleted by my cleanup function either as it could not be found)Could not find file 'C:UsersAdministratorDesktop..ILCNETSL10663.csv'
Background:The first file that is found missing is the encrypted login information file while the second file is the winscp.com downloaded csv file.
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Jun 15, 2011
I'm developing an application in vb.net. You drag any type of file onto the exe, and a window pops up with some options for the file, then it saves the file to a different location, works some SQL magic, etc. It works great for the most part. The only issue I've found is that if the path of the file contains any spaces, the application will crash immediately with the error window:[URl]..I'm using: Private filename as String = Command$ This is located right inside my form's class declaration, not within a sub/function.Without this line, my program runs fine (although useless, without accessing the file).I've also tried (I think this was it, I don't have the code with me at the moment): Private filename as String = Environment.CommandLine So, in vb.net, is there a way to drag a file onto an exe and use that path name, even if there are spaces in the path name?
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Nov 8, 2011
I am running a simple test app that opens an OLEDB connection, retrieves a single value, then closes. The compiled (console) app works fine, but running it from the IDE causes either a silent close (if it's a winforms app) or a crash of vshost32.exe if it's a console app.
The devenv is VB 2010 Express on Windows x64, but I have the configuration manager on the solution set to "Debug" - "x86".
Imports System.Data.OleDb
Module Module1
Sub Main()
Dim server As String = "xxxxx"
[Code]....
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Aug 18, 2011
I'm trying to copy multiple excel source files into one excel file. My current code is working only for 3 source files..If more than 3 files are there, it doesn't copy the data but creates blank work sheet in the output excel file. Lets say I have a source folder with 5 excel files. Each workbook contains one worksheet with data. It copies upto 3 worksheets along with data into output excel file.
Lets say excel1 contains A as work sheet, excel2 contains B as work sheet ,excel3 contains C as work sheet ,excel4 contains D as work sheet ,excel5 contains E as work sheet .Now my output excel file should look like..OutputExcel with A, B, C, D, E along with respective data.But my current code is giving output as A,B,C worksheets along with respective data but its creating blank sheet1,sheet2 in place of D & E.
SSIS Script Task Vb.Net Code:
Public
Sub Main()
Dim filePath
As
String =
[code].....
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Aug 1, 2011
I've been struggling with this for hours. I'm making a vb program to track volunteer hours. I have some fields that a user can fill in and then click update and it should add the volunteer info to the database. To confirm that it was added I'm using a datagridview that can be updated to show the volunteers in the database. My success msg says that the insert worked, and the information is showing up in the datagridview but when I close the application and go to 'show table data' for the volunteers table there is nothing there. I've tried adding .Update() to my VolunteersTableAdaptor and I've tried resetting my SqlCeCommand after the ExecuteNonQuery() call, but these haven't worked. When I hover over the last word 'Volunteers' in this code:
Me.VolunteersTableAdapter.Update(Me.AddVolunteers.Volunteers)
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Jan 14, 2012
u have a problem with a auto number of access field,Description : in my bank(access) i have 4 field , one of them is my primary key(id) and it is AutoNumber,in my app i connect to my db and i insert a record to my bank and it works correct,but when i delete a record which id is 1 , no one of my new record has id 1 , and it is a problem in future because i should have a 40000 record and i may delete a lot of them ,
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Mar 20, 2010
I tried coding for an application that will display the positive integers, negative integers and zero entered in a inputBox. for some reason it keeps crashing down.here is my code. paging all visual basic professionals. [code]
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Aug 30, 2010
Is there any way to insert an existing macro into a existing excel file without using the excel library ? I need this to set the excel to print whole work book .I cannot use excel library because it will be done online in the server where installation of excel is not possible. I can however use the c#.net coding . I am using NPOI to generate the excel.
the macro is given below
Private Sub Workbook_BeforePrint(Cancel As Boolean)
If printed = False Then
Cancel = True
[Code]....
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Feb 2, 2012
Basically I have and array of integers that vary in size. I need to compare each number to each other number and display which number is repeated. For example:
Dim ints() As Integer = {1,2,2,5,4,6}
The number that shows up more than once is 2.
How can I run through the array and compare each integer with the numbers in the array. I tried a for loop but it didn't return the value I was looking for.
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Oct 14, 2009
See
Public Class Form1
Dim sql As String
Dim conn As New OleDb.OleDbConnection
Dim da As New OleDb.OleDbDataAdapter
[CODE]...
The problem, The INSERT statement works fine in the form load but not in the button click event?
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Oct 21, 2008
This code no longer works in ver 2007:' Obtain max resources available for Excel
[Code]...
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Jun 28, 2011
This is my code to add a row to an excel file:
Public Sub Add_Records()
'==========================================================================
' Run an INSERT INTO command to add new records to the workbook.
'==========================================================================
Dim Variable As String
Variable = "15000"
Dim conn1 As New System.Data.OleDb.OleDbConnection(m_sConn1)
[Code] .....
It works fine as long as the variable Variable is a number. If I make it a string it doesnt work.
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May 7, 2010
I am taking a pre-existing excel spreadsheet and inserting a blank row at the top. This part works, the part I am having problem is the fact that based on the code I have, I have to open the spreadsheet so when you execute the code the spreadsheet opens. Then when done, close it. When I try to close it wants me to save the document, even if I call the save method. This whole process should happen behind the scenes so I really don't want the spreadsheet opening.
See code below.
moApp.Visible = True
oWB = moApp.Workbooks.Open("I: estcsv.xls")
oWB.Sheets("testcsv").Rows("1:1").Select()
moApp.Selection.insert(xl.XlDirection.xlDown)
oWB.Save()
oWB.Close()
'When call the close, it still asks me to save the spreadsheet even though I called oWB.Save above.
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Dec 3, 2009
I am tring to insert a row or shift all the row down one; depending how you want ot look at it. In oter words I have data in rows one through 10 and I want to move it down so that I can put a headings in row one.In Excel VBA I would do something like:Rows("1:1").SelectSelection.Insert Shift:=xlDownBut you can not use exactly this code in VB.Net and I cannot figure out how to do it here.Here is code that I used, succsessfuly to widing a cell:Code: rng = xlsSheet.Application.Range("D:D") rng.ColumnWidth = 17.0
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Jan 7, 2009
1.) error on saving the data into excel sheet when the program is execute nonquery the bold line below
Try
Dim MyConnection As System.Data.OleDb.OleDbConnection
Dim myCommand As New System.Data.OleDb.OleDbCommand
[code].....
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Mar 24, 2010
i am using the following code in vb.net wich opens me the folder to select excel but i dont know how to import these values to sql.
[Code]...
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Jun 5, 2011
How could i insert blank row in excel using vb dot.code?
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Oct 15, 2011
using System;
using System.Collections.Generic;
using System.ComponentModel;
[code].....
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Mar 20, 2010
I have a label that displays the result of a calculation, i.e lblTotalCost.Text = dTotalCost, where dTotalCost is a Double. When I try use FormatCurrenct(lblTotalCost.Text = dTotalCost), the program crashes and says unable to convert string to double.
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Jul 22, 2009
i am generation a excel sheet from vb.net and have a question on inserting a forumla from vb.net into an excel sheet.
I am creating this sheet out of vb.net but with a statement like this:
worksheet.cells (1,10) = "myvalue"
For my formula i need the read cellnam like "A1". But i have only the value cells (x,y). How can i get the real cellname for my formula or how am i able to insert a formula with the given information (cells(1,1))?
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Dec 15, 2009
I want to insert worksheet object on a VBA form for AutoCad. I had done it before. But now I can not recall which object was used for this.
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May 11, 2012
I created an add-in for excel with vsto, I put the image in the folder "Resources" of the project. Now I put the image on the sheet as in the example
I tried this way but don't works
mySheet.Pictures.Insert(Global.Myaddin.My.Resources.Image1)
mySheet.Cells(12, 10) = Global.Myaddin.My.Resources.Image1
mySheet.Shapes.AddPicture...???
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Dec 14, 2009
Insert+Center Image into Excel?
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Aug 5, 2010
I've got a heavily used web application that, for the first time in 2 years, failed doing an equality check on two doubles using the equality function a colleague said he'd also been using for years. The goal of the function I'm about to paste in here is to compare two double values to 4 digits of precision and return the comparison results. For the sake of illustration, my values are:
Dim double1 As Double = 0.14625000000000002 ' The result of a calculation
Dim double2 As Double = 0.14625 ' A value that was looked up in a DB
If I pass them into this function:
Public Shared Function AreEqual(ByVal double1 As Double, ByVal double2 As Double) As Boolean
Return (CType(double1 * 10000, Long) = CType(double2 * 10000, Long))
End Function
the comparison fails. After the multiplication and cast to Long, the comparison ends up being:
Return 1463 = 1462
I'm kind of answering my own question here, but I can see that double1 is within the precision of a double (17 digits) and the cast is working correctly. My first real question is: If I change the line above to the following, why does it work correctly (returns True)?
Return (CType(CType(double1, Decimal) * 10000, Long) = _
CType(CType(double2, Decimal) * 10000, Long))
Doesn't Decimal have even more precision, thus the cast to Long should still be 1463, and the comparison return False? I think I'm having a brain fart on this stuff...Secondly, if one were to change this function to make the comparison I'm looking for more accurate or less error prone, would you recommend changing it to something much simpler? For example:
Return (Math.Abs(double1 - double2) < 0.0001)
Would I be to try something like:
Return (double1.ToString("N5").Equals(double2.ToString("N5")))
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Jul 14, 2011
I wonder, whats the proper, accepted way to convert doubles to strings? I've heard cstr(blah) is wrong (despite it working perfectly OK for me....), what is the proper way to do this say if I want to display the value of a double in a textbox (along with 'the answer is' or somesuch)?
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Jun 8, 2011
Having problem make last if an statement work in the code. the variables in the if statment are doubles but the ide keep telling i need a proceeding if statement. but is already there it is in the last if statement of the code
Public Class Form1
Dim Totals As New List(Of Double)
Private Sub btnclear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
[CODE].....................
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Jun 10, 2011
I'm using Visual Studio 2010 (VB.Net) and Open XML SDK 2.0. How do you insert a formula into an Excel 2010 worksheet? When I do this I also wish to set the CellValue property of the cell to a DBNull or EmptyString to force Excel to recalculate the cell when the user opens the workbok.
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