VS 2008 Errors Changing Type Excel?
Mar 29, 2010Error14Option Strict On disallows implicit conversions from 'System.Windows.Forms.TextBox'to 'Microsoft.Office.Interop.Excel.TextBox'
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VS 2008 C# To VB Conversion Errors-Generate Excel Files Not Using Ms Excel?
Feb 12, 2012[URL]..a good way to create Excel files without using Ms Excel,but this is C# source code,I used [URL]..to convert from C# to VB.NET,but after conversion There are some strange errors :
Error21Too many characters in character literalc:BBBXLSExportDemoXLSExportDemoExcelDocument.vb1625XLSExportDemo
Error22Empty character literalc:BBBXLSExportDemoXLSExportDemoExcelDocument.vb1633XLSExportDemo
VS 2008 Inserting Data Into Excel Keep Getting Errors
Oct 11, 2009I am testing out this code which creates a excel file, and then call a sub to insert data into the file. The excel is created, but the function is not inserting the data. I am getting a error "External table is not in the expected format". I do not know what could be the problem.
This is the code below:
Imports Microsoft.Office.Interop
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
[Code].....
SQL Server 2008 FileStream And Excel 2007 - Errors In Opening The Spreadsheet?
Feb 12, 2010I am having a problem with using the SQL Server 2008 FileStream function with an Excel 2007 spreadsheet. I can store an Excel 2003 format spreadsheet and bring it back with no problem. When I bring the Excel 2007 format spreadsheet back from the DB I get a message that there are errors in opening the Spreadsheet and the Excel App asks if I want them repaired before it is displayed. I answer yes and the Spreadsheet is renedered perfectly. Could this be a FileStream problem or an Excel 2007 problem?
View 11 RepliesVS 2008 - Handle Errors - DataGridView Was Filled From An Excel Sheet With A Column Of Currency
Dec 6, 2010I'm trying to read rows in a DataGridView and the following error is thrown up. The DataGridView was filled from an Excel Sheet with a column of currency. Ideally when the For Next loop finds a cell it doesn't like, I want to to ignore and resume the loop. The error message is: Object reference not set to an instance of an object
HTML
Try
For Each row As DataGridViewRow In Me.DataGridView2.Rows
FirstString = row.Cells(0).Value.ToString
[CODE]...
VS 2008 Finding/Changing Range From Existing Excel Chart?
Aug 2, 2011I have an Excel template that contains numerous pre-defined charts and a program that opens this template and collects data used to populate the charts. This works great but I now want to adjust the series length so that the charts only used the data collected (not a range of 32000). I'm trying to iterate through the charts and determine the range for each series of each chart but not having much luck. The snippet below allows me to see the xvalues but does not return any information as to where this data is located. Does anyone know how to extract the range for each series in a chart?
[Code]...
Multithreading Errors With Excel Workbook?
Aug 26, 2009I have a .Net program that responds to worksheet updates of an Excel 2003 workbook. Sometimes when the worksheet is updated and I try to write related data to my forms, I'm getting "Cross-thread operation not valid...." errors. This confuses me, as I have never done any multi-threading in my program. Does the mere act of me responding to events of an external excel worksheet mean I am now multithreading? Is there a way to handle the events without multithreading?
View 4 RepliesUsing Interop For Excel Not Working And Causing Errors?
Jun 28, 2012This is quite a pickle... I am using interop to read and write in excel but the project is not reading the excel correctly,!
This is in a public Module
Public name, accessories, comments as string
Public edit As Object
[code].....
IDE :: Errors In Form Designer - Error 1 Type 'DCV.dev_DCVDataSet' Is Not Defined
Jun 18, 2010Each time I drag the tables from the data sources into the form, frm, I get errors from the frm.designer.vb like
[Code]...
Unable To Cast Object Of Type 'System.IO.FileStream' To Type 'Excel.Application'
Jun 1, 2009I'm having a problem with converting from one source type to a destination type. I have a form with 2 buttons (button 2 uses the OpenFileDialog to have the user open an excel file set to NewFile),(button 1 takes the contents from specific cells in NewFile and arranges them how I need into oXLApp1).
The error I get is "Unable to cast object of type 'System.IO.FileStream' to type 'Excel.Application'." in line 14 of the code below.
Public Class Form1
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
[Code]....
Type Excel.worksheet Not Defined, Type Excel.workbook Not Defined
May 8, 2010i am trying to read an existing excel 2007 file from vb.net i used a form with single button and i written code in button click event code is :[code...]
View 1 RepliesErrors When Writing Or Delete A File Using System.io - Array Bounds Cannot Appear In Type Specifier
Oct 21, 2009why i get these followinf error in the following codes please
'Delet the file on the path, it does exist
Dim deletfile As System.IO.FileStream
deletfile = System.IO.File.Delete("C: emp.txt")
i get error underlining in blue the part
System.IO.File.Delete("C: emp.txt")
and the error is "express does not produce a value" second error i get is in this code
Dim datawriter As System.IO.StreamWriter("C: emp.txt")
where
("C: emp.txt")
is underlined in blue n the error says "array bounds cannot appear in type specifier"
Errors With Loop - Log-in App That Has Username, Passwords & Account Type Stored In A SqlCe Database
Oct 23, 2009Getting some errors with a loop. It's a log-in app that has username, passwords & account type stored in a SqlCe database. I would like it to sync with a larger database for updates that has not been made so i left it out but I have started to make a loop that would connect it to the larger DB and if connection failed would try a set number of times before stopping the program. I'm coding this project with Visual Studio 08 pro
Dim conndb As New SqlCeConnection("Data Source = |DataDirectory|\Mydb.sdf")
Dim x, y, z As Double
x = 1
y = x + 1
z = 5
[CODE]...
.net - Excel Data Export Fixing Number Errors/removing Green Triangles
Aug 8, 2011After exporting data using a third party component the data in the excel sheet isn't type correctly. Excel thinks that some values are string while they are numbers and a little green triangle shows up.
We've coded the following to fix this:
For Each objCell As Microsoft.Office.Interop.Excel.Range In objWorkSheetReport.Range(objWorkSheetReport.Cells(1, 1), objWorkSheetReport.Cells(Me.RowCount + 10, Columns.Count + 10)).Cells
[Code].....
This removes all those little green triangles but is really slow.
Is there a faster way to convert a Range of data quickly so the green triangles don't show up?
Changing The Type Of A Dbgrid Column?
Jan 5, 2010Is this possible after binding a data source to it?
View 2 RepliesChanging The Type Of Datetime In Database?
Aug 21, 2011I am using a sql server database and i am storing the time value in the datetime variable. I am developing a booking system application in vb.net. When I want to view already made bookings using datagridview and by implementing dataadapter and dataset it shows the time column with system date which was saved with time when the record was inserted. Now I want to view only time in the Time field when extracting the data....What should i do now??
View 3 RepliesReflection And Changing A Variables Type At Runtime?
May 26, 2010I'm trying to create an object Of a specific type. I've got the following code, but it fails because it can't cast the new table object to the one that is already defined. I need table to start of an IEnumerable type so I can't declare is an object.
Public sub getTable(ByVal t as Type)
Dim table As Table(Of Object)
Dim tableType As Type = GetType(Table(Of )).MakeGenericType(t)
[code]....
is there a way of changing a variable type at runtime?
Changing Excel Border Colors?
Sep 2, 2009I'm using VS 2005 and I've created an Excel spreadsheet and written a lot of data. I've also modified some of the cell interior colors via commands like this:
objWorksheet.Cells._Default(Bline + 2 + i, 1).Interior.Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.White)
But what I am finding is that the borders are getting wiped out.
[code].....
Export To Excel - Changing Old VB Code?
Dec 30, 2009I have been changing my existing code over the past week and have not successfully been able to export to excel in the format that the users are request. I am new to this job, learning vb through training videos, and have been given the task to update problematic old code and interfaces.The users cannot export large amounts of data. They receive a runtime error. The users do not want the export to html.The users do not want the controls to be exported.
[code]...
VS 2008 Excel - Error "Old Format Or Invalid Type-DLL"
Jul 30, 2010[Code]...
This code has worked for me on an other machine, but when I try it on my own I get this error: "Old format or invalid type-DLL."
Changing Cell Color Of Excel Sheet?
Aug 8, 2011I am writing some data from database to the excel via visual basic.net.I need to change background of some cells and also need to make text bold. I need something like that :
xlWorkSheet.Cells(rownumber, 1).BackgroundColor = Color.Yellow
xlWorkSheet.Cells(rownumber, 1).Font.isBold = True
Of course none of above is works.How can I achieve this?
Asp.net - Make Connection With Excel Where Data Is Changing Rapidly?
Apr 27, 2011i making a website for trading in which trading feed coming from a source in excel sheet. i have to show data from excel sheet to gridview. but when i make connection it will lost due to rapidly data( in excel sheet each cell change value 1-3 times in one second).Am using Ajax Timer of interval 1000.
View 1 RepliesChanging Some Pages Of A Website From Excel Documents To HTML Form?
Jun 29, 2010I wondered if someone could help me with my code. I am changing some pages of a website from Excel documents to HTML form.I have most of the code sorted but I also need to save a few documents to Word. I keep getting a few errors and cannot seem to solve them.
I have included my code and highlighted the errors by underlining them. Maybe someone can help??
Imports Microsoft.Office.Interop
Imports Microsoft.Office.Interop.Excel
Public
Class Form1
Dim path
[Code]...
ASP.NET UpdatePanel Timeout And 500 Errors With Custom Errors?
Sep 23, 2011I have a .net application that uses customerrors web.config module to display meaningful messages for errors. It works without any issues for 500 errors/exceptions caused by non-ajax and ajax components (updatepanel). However, in a scenario where updatepanel's asynchronous request times out, there is no error raised at all. I was able to see the timeout in firebug and come up with a solution that would at least display the error message as an alert and then redirect the user to the 500 error page using javascript but it's not quite doing what the rest of the application does in case of an unhandled errors like these. I basically just want everything to go through "LogEvent" mechanism so based on the severity of the error, it does the necessary work.This 500 error page doesn't have anything in the Server.GetLastError() for these timeout scenarios. Is this an expected behaviour? Can it be changed so I do have access to these timeouts in Server.GetLastError() OR maybe just run this error through "LogEvent" mechanism? Is there a better/more graceful way to handle this issue?
Below is my code to give you an idea, not exactly what I have in my application but pretty close.
Web.Config
<customErrors mode="On" defaultRedirect="~/Errors/ErrorUnknown.aspx" redirectMode="ResponseRewrite">
<error statusCode="500" redirect="~/Errors/Error500.aspx" />
</customErrors>
[code]....
VS 2008 Type Of File - Full Description - "Microsoft Office Excel Comma Separated Values File"
Apr 30, 2009When I look at a file on my hard disk, e.g. test.csv, when I look at the Properties of the file, it is officially known as, "Microsoft Office Excel Comma Separated Values File", and file types of .pdf are listed as "Adobe Acrobat Document", etc. etc. All of this information can be seen in Windows Explorer too when my folders are displayed by Details. How do you get at this "type of file" information with .NET?
View 2 RepliesCode Errors In VS 2008?
Mar 16, 2009I am working on a project for school and I am encountering several errors in my code relating to the numeric up down boxes I have in the application. I have inserted my code and the error list below. I'm sure that it is probably something really simply but I am learning the language on my own and I am a little stumped here.
View 18 RepliesConverting Vb6 To .net 2008 Got Some Errors
May 7, 2010I converted vb6 project to vb.net 2008 but I got some error first one :Name 'VarPtr' is not declared.I got this one two times :Value of type 'Projectname.Func.EXPLICIT_ACCESS' cannot be converted to 'String'.
View 9 RepliesVS 2008 Getting Errors When Debugging?
Jul 19, 2011PROJECT TYPE: Windows Forms Application
LANGUAGE: Visual Basic
.NET VERSION: 3.5
IDE: Visual Studio 2008
OPTION STRICT: on
OPTION EXPLICIT: ON
I am attempting to teach myself VB and write a parental control application at the same time, so my learning curve is rather steep. However, I have managed to complete the design of the application with no design time errors, and to my untrained eye, all my code looks like it should work. Unfortunately, when I attempt to debug the thing, it returns an error that looks like Greek to me. I have traced to line numbers I found mentioned in it, but I couldn't find anything wrong. I just need someone to point me to the part of my code that isn't working, and maybe give me an idea of how to improve it.
The project consists of 3 forms: MainForm, WarningForm, and AboutForm. The 1st and 3rd are self explanatory, the 2nd is simply a message popping up telling the windows user that they have 10 minutes before they will be logged off of windows. I cannot imaging why any of the codes on the 2nd or 3rd forms should be causing this issue since they don't activate until either a button is pushed (AboutForm) or after a certain number of hours has elapsed (WarningForm). So unless someone feels that it would be helpful, I won't post those on here.
[Code]...
Automating Excel 'type Not Defined'
Apr 24, 2011I'm very new to VB.Net and just trying to find my feet a bit and get my first programs running.url...Which should allow me to run excel from VB.Net, but I get heaps of errors - basically anything specific to Excel comes up with 'type not defined' or 'name not declared'. I've tried adding the reference several times and I'm pretty sure I've followed the tutorial to the letter so I'm stuck.Don't want to post the whole code because it's very long, but here's the beginning and end:[code]
View 1 RepliesVS 2008 - Errors When Using Program On Another System
Dec 13, 2009I have developed a contact's manager in VB.net 2008, the program works fine on desktop's but when I try using it on a laptop I get this error message:
microsoft.visualbasic.powerpacks.vs, version=9.0.0.0, culture=neutral,publickeytoken=b03f5f7f11d50a3a