VS 2008 Determine If Worksheet Exists
Feb 15, 2010
I am trying to create a function that will determine if a worksheet within the active workbook exits. I have searched many web sites without any luck. Here is the coding I have currently:
HTML
Function SheetExists(ByVal sheetname As String) As Boolean
Dim oWorkbook As Excel.Workbooks
[Code]....
It errors out at Dim oWorksheet As Excel.Worksheet = oWorkbook.Sheets(sheetname).
The error message I am getting is "Object variable or With block variable not set."
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Jan 10, 2010
Im just trying to determine if a website exists when i navigate my webbrowser. via messagebox.Ive tried this so far but it wont work:
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
If WebBrowser1.DocumentText.Contains("Action canceled") Then
[code]....
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May 9, 2009
Just like the title says, I have a webbrowser and I need to determine if the element exists or not before I invoke it.
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Aug 9, 2010
I'm using the coding below to determin if a certain file exists on the hdd. However there is an error on this line: If FileExists("C:myfile.txt"))="False" then msgbox "False"
it gives me the following error message:End of statement expected.
what am I doing wrong?
[Code]...
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Aug 27, 2010
Below is the code that is adding a toolstripmenuitem at runtime. I do need to check elsewhere to see if it exists. What I have below is incorrect. How would I change the conditional check below?
ToolStripMenuItemFile.DropDownItems.Add("Save")
ToolStripMenuItemFile.DropDownItems(2).Click += New EventHandler(SaveFile_Click)
If ToolStripMenuItemFile.DropDownItems(2) IsNot Nothing Then
ToolStripMenuItemFile.DropDownItems(2).Text = rm.GetString("Save")
End If
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May 23, 2012
Is there a way to determine if a Printer exists?I want to warn my users that a printer doesn't exist before they send reports to print.
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Apr 1, 2012
I have an Excel Add-In with a custom ribbon and custom buttons. I'm trying to get these buttons to insert different templates that I have created for our reports. I want these templates inserted into the active workbook, after the active worksheet.This code will add the template worksheet to the active workbook, but it is placed before the active worksheet:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As Microsoft.Office.Tools.Ribbon.RibbonControlEventArgs) Handles Button1.Click
Try
[code]....
I have been having problems getting the template worksheet inserted after the active worksheet.Here is what I have so far:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As Microsoft.Office.Tools.Ribbon.RibbonControlEventArgs) Handles Button1.Click
Dim myxl As Microsoft.Office.Interop.Excel.Application
[code]....
I get an error with the 'ws' aspect of this particular line: Globals.ThisAddIn.Application.Sheets.Add(Type:="C:Template File Name.xltm").WorkSheets.Add(After:=ws()) The error message states: "Interface 'Microsoft.Office.Interop.Excel.Worksheet' cannot be indexed because it has no default property."
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Nov 14, 2008
I have a function in VS2008 VB.NET that creates a dataset and reads field values from that were loaded from a SQL Server 2008 database tables. The tables are from varied sources and in some cases particular column/field names are different. Some use a long name; others use a short name. I need to determine whether a short name or a long name is being used.Pseudo code:If row("ShortName") Exists then ReadDataFrom r("ShortName").ToStringElse ReadDataFrom r("LongName").ToStringEnd If
How would I determine if a particular column name exist in a dataset or datarow?
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Jan 7, 2009
I wanted to create a login system that would have 3 tabs 1 for regular login, 1 for admin login and 1 for account creation. So far so good. It saves the accounts by saving them in a .urs file in the map called /Users/. However when this map does not exist it will show a error. I would want to know what code or so to put into the form_load which will make my program create the map /Users/ if it does not exist. As im not familiar with all the codes and stuff. The only thing i can come up with is
Mkdir "/Users/"
but then ofcourse it would create the folder users everytime i start the program. not i was still "Hello Worlding" a few days ago, so i really am unfamiliar with any sort of high-skilled programming which i probably dont understand.
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Jan 25, 2010
I would like to check if a URL exists -- without requesting the file. The program needs to check if a PDF or Excel spreadsheet exists at a particular URL. If it does, it might want to download the file, but it should not download it every time.
I currently use the WebBrowser.Navigate method to do this, but it always downloads the file. But I don't want to actually download the .pdf or .xls file, I just want to determine if the URL exists.
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Feb 17, 2010
I have the name of a form in a string variable, e.g. "frmOptions". I want to:
1) get the fully qualified name of the form
2) determine if the form exists in the application
3) create an instance of the form
4) show the form
I know that using reflection I can do #3 this way, but I need to get the fully qualified form name first[code]...
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Apr 27, 2012
I am working with LINQ to XML in VB (although answers in C# are great, too). First off- my code works, so this is not critical. However, I can't help but think that what I'm doing with conditional logic should already be doable using the LINQ query itself. Here's what I've got:
'Get the Description elements in the ResultData section where the value is "Op Code"
Dim opCodes As List(Of XElement) = (From c In xdoc.Descendants("ResultData").Descendants("Description")
Where c.Value = "Op Code"[code].....
Please don't be too critical of my method of locating the sibling nodes- the XML files are produced by a third-party testing device and this is the only generic way to get the values I need. What I'm really looking for here is a better way to handle the If block.
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Oct 9, 2010
I am using the below to write a listview to sheet1 and are then trying to write a grid to sheet2 but i get this error on line 40 "moApp = moApp.Worksheets(2)"
[Code]...
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Aug 30, 2010
I am attempting to create a worksheet in an existing excel spreadsheet from visual basic 2008 but it does not create it. My code is below.
Dim strFilename = "C: est.xls"
Dim SQL2 = "CREATE TABLE" & _
" [" & strFileName &
";].[Sheet2] ;"
[code]....
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Aug 19, 2010
I would like to ask how I can select an Excel worksheet via code in vb. I looked but I only came across something like the below:
Private Sub Button2_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button2.Click
Dim objSheets As Excel.Sheets
[code]....
with the line: objSheet = objSheets(1), but because the tabs can be in any order, using the index isn't really helpful to me. Is there a way to select a worksheet by name in VB 2008?
Perhaps something like the : objSheets("MyWorksheet").select
that is something akin to the Excel vba code?
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Mar 16, 2012
This is my first time posting in a forum like this, so please excuse me if I accidentally break any thread rules (btw, where can i find these?). I am very new to Visual Basic and have been trying to teach myself as I create this program. I have experience with macros in excel so I do understand some of the coding, but definitely nowhere near being proficient. I am using Visual Basic 2008 Step by Step (Michael Halvorson) to teach myself.
I am trying to create some code in my program that will allow the user to open an excel file and then return the number of rows and columns in the worksheet. There will only be 1 worksheet in the workbook (since this is just a small part of a larger program I am writing). I already tested the code that will open the file in another program and it worked fine; the thing that is catching me is the row and column counts. I'm a bit stuck here and was hoping someone could point me in the right direction. Here is the code as follows: Code: I have another sub for a quit button which I chose to leave out. The last line for the MessageBox is causing me problems.
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May 22, 2012
I have a project to import data from one worksheet into database SQL Server 2008 on Windows Server 2008 using Interop. The project in debug mode works fine, but accessing the site from a client computer, I am getting permission denied message to the file I'm trying to import and it is located on the server. I wonder what it takes to make additional settings, as well as file folder. IIS? DCOM?
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May 13, 2012
I amusing VB.net to count the number of HPageBreaks in an Excel worksheet...here is the code I'm currently using:[code]Sometimes it returns the proper count...but most of the time it returns "0" and I have no clue as to why.
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Dec 4, 2009
am trying to store and retrieve data from a closed excel worksheet while in a form created in vba studio express 2008?
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Sep 23, 2009
Is it possible to use VB to see if a certain URL exists. For example see if [URL]
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Jul 19, 2010
I've created the following function and thrown it inside of a timer:
[code]...
It works, but it keeps trying to open media player for each process it looks like. I need to continuously run the function so that Media Player opens when it's closed.how to make sure it opens only once when the process doesn't exist?
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Jan 17, 2011
Controls: textbox, combobox and button
I want to have a condition to find out if the value I enter in the textbox exists in the combobox. The combobox reads a text file.
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Sep 9, 2009
I am filling a listview control with a big number of items but i came across an problem, the repeated values. In those items i use .Text and .Tag so i can relate some hidden values per item. I have been trying to use the items.find() with no luck since it looks like to search for keys, which i don't really have. Every item has different .Tag values but it can happens that they have the same .Text Is there any way to remove or just not add items based on a .Text search in the ListView?
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Apr 14, 2011
I am using VS 2008 and MySQL. Which one of the following methods is efficient or a proper one to check if record exists or not before making an attempt to insert.
1. HasRows Property.
2. Select Where Exists
3. Select Count(*)
Or if there is any other appropriate method ( which i am not aware of ) available to do it in vb.net ?
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Feb 9, 2011
I'm checking is a file exists as follows.
If txtGradeObs.Text = "" Or Dir(txtGradeObs.Text) = "" Then
MsgBox("Specify the Grade job of Obstructions", vbExclamation, MsgBoxTitle)
Exit Sub
End If
I get an error if the drive does not exist - i.e. G: rather than C:. It used to work in VB6. How can I get it to work.
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Nov 20, 2009
At the moment when a user logs into my system it checks to see if a job exists, if so the records are put into a datagridview. However, if there are no jobs in the database I get an error.
[Code]...
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Apr 15, 2010
looking at the code below I have a form that is inserting data from text boxes and a datetimepicker into my database.If Date.text and Shift.text already exist in a row then UPDATE instead of INSERT a new row?
conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=database.mdb;"
da.SelectCommand = New OleDbCommand("SELECT ID, idate, icomment, ishift FROM table")
da.SelectCommand.Connection = conn
[code]....
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Aug 5, 2009
How can I make it that if a file exists, it will rename it with the exact name, but with a number by it? For example, my program takes a picture and names it "screenshot." I want it to make it say "screenshot1," if "screenshot" is already used, and so on. This is what I tried, but didn't work.
Dim name as String = "Screenshot"
If File.Exists("C:This" & name & ".png") Then
screenshot.Save("C:This" & name + 1.ToString & ".png",
[CODE]...
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Jun 28, 2009
how can i test if datable exists?
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Sep 25, 2011
i can't find any wrong, if record exists then updated the record but only can insert the new record.
cannot updated the record.why?
[Code]...
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