I have a range of data that I want to replace with new data.So, I want to clear the old data and replace it with new data.But the formulas in the old data are also required to work on new data.[code]...
View 2 Replies(using VB2008)I was wondering if it's possible to implement dynamic (runtime) formulas between objects and properties. My inspiration is Excel, where any cell can have a hardcoded value or be a function of other cells. So via analogy of a property acting like a cell, depending upon the situation, I would like to either give it a defined value or make it a function of other properties of objects of the same type.
There seem to be two basic levels of functionality, 1) the dependent property recalculates its value every time it's accessed, or better is 2) it detects when its input properties change value and recalculates itself only once (as in Excel). But so far I've failed to find any way to do either with ordinary properties. It seems like I would either have to turn each property into a class (and use events, references to parent properties, etc), or use reflection heavily. Either way I feel like I'm going off the beaten path and making things complicated. Has anyone done something like this?
Visual Basic 2010.I excel in transferring reports on problems in formulas..[code]
View 3 RepliesWhat I'm trying to do is extract values, colors, comments, and any formulas for a range of cells in a given worksheet. The ultimate goal is convert a spreadsheet someone has been using as a database into Access tables.
worksheet.Cells(row,column).Value 'extract value WORKS
worksheet.Cells(row,column).Font.ColorIndex 'extract color index WORKS
worksheet.Cells(row,column).Comment.Text 'extract comment WORKS
worksheet.Cells(row,column).Formula 'extract formula DOES NOT WORK
The return value for .Formula is same as .Value. That's not what I need. I'm looking for a textual representation of the formula (to extract rate information embedded within the formula).
We have an automatic process that opens a template excel file, writes rows of data, and returns the file to the user. This process is usually fast, however I was recently asked to add a summary page with some Excel formulas to one of the templates, and now the process takes forever.
It successfully runs with about 5 records after a few minutes, however this week's record set is almost 400 rows and the longest I've let it run is about half an hour before cancelling it. Without the formulas, it only takes a few seconds to run.
Is there any known issues with writing rows to an Excel file that contains formulas? Or is there a way to tell Excel not to evaluate formulas until the file is opened by a user?
The formulas on the summary Sheet are these:
' Returns count of cells in column where data = Y
=COUNTIF(Sheet1!J15:Sheet1!J10000, "Y")
=COUNTIF(Sheet1!F15:Sheet1!F10000, "Y")
[Code].....
I want to export dataset content using VB in one shot as i'm exporting crystal report
View 1 RepliesI am using excel to store and retrieve information. I open the excel work book then close it once the action is completed. I thought it was clearing fine till i opened my Task Manager and found a ton of instances in the Task Manager. I can clear them manually but my users are not going to do that and it is cheesy to have them have to do that. I have researched this and some folks were talking about a "Marshal" method. I researched that and don't understand what it does.[code]...
View 3 RepliesI need some code which checks if excel is open or not, if excel is not open then opens it (that code is fine)
else try to write some content/cellvalues to the already opened excel, basically I am creating windows application, which has been scheduled to run numbers of time in a day, when ever application executed, the application has something to write to the excel. one more thing is i don't want excel to save and close every time i execute the application, Its like transparent processing of EXCEL writing, a file is already opened, just write some content, and after writing it exit the application without either closing or saving the excel
I was given a task to actually to develop a application where it will automate the process of extracting data values from excel files and add in into access table. Is there any online examples or any advices on how to go about developing this?
View 1 RepliesI created this code to export from DGV to Excel and it worked with me. I tried to print the data from DGV to specific cells in worksheet but I don't know.
[Code]....
I already know the basic procedure of how to read specific cells of an .xls file using VB.NET but I can't figure out how to automatically get all the data from such a file.Basically, I'm obtaining the data like this:
Dim xlApp As Excel.Application
Dim wb As Workbook
Dim ws As Worksheet
xlApp = New Excel.Application
[code]....
In this case, I know that there will be content in the first 10 rows of the columns A, B and C but what would I have to do if I had a huge document whose size and content might even change from time to time? I know that there is also an attribute ws.rows.count but this always returns a big value like 60000 even if only a few rows are occupied.So basically, I'm looking for a simple way to loop through all the used rows of an Excel file with the possibility of accessing each cell in that row.
I already exporting contents of my datagridview to excel and word but I need to format one of the column of my datagridview. That column is "Amount". In my datagridview, it displays like this "122234". I want to display all the value in that column in this format: "122,234.00". I already tried to format it to number("N") in my datagridview but when I exported it to excel and word, it shows no format.[code]
View 4 Repliesthere is a datagridview, which will display Group Name in first column, Variables in second column.Users will populate it manually. will select a group name in first column, variable in second column. in similar, for some count of rows the group name remains similar, with different variables in second column.There may be different groups with lot of variables in second columns.our requirement is to insert a formula where ever its needed by the users.like getting subtotals at each level of groups.Also in case if they needed to have subtotal after two or three groups they must be able to define the row a formula to add those groups sum.
View 5 RepliesHow to clear a listbox in Visual Basic 2010. I googled it but people were saying just use "Listbox1.Clear()" function and that doesn't work.
View 2 RepliesI was just wondering how to clear an array in VB.[code]...
View 1 RepliesI extracted text from a third party software application. All the text is now in string and correct in my Form Labels.
Text look like
Label1
0.25
Label2
[Code]....
But I can't convert the labels from string to double or Decimal.
I'm working on a project where I need to evaluate some formulas in VB.NET. I've been using the MS Script Control to evaluate some of the simple logical/mathematical formulasHowever, I'm now faced with dealing with string expressions that set variables in my program to certain values. So, for example, let's say I've got the following:
Dim netPrice As Decimal
Dim expressionFormula As String = "netPrice = 0"
[code]....
i want to autofill a formula down a column of cells in excel. to manually do this, i would double-click the little black square at the bottom right of the cell, but i cannot figure out a way to do this using a macro.
View 1 RepliesI use this to delete cookies
System.Diagnostics.Process.Start("rundll32.exe", "InetCpl.cpl,ClearMyTracksByProcess 2")
works fine I checked the folder myself it deletes all .txt files.
But here Is the problem lets say I log into hotmail, Clicked the button to Clear my cookies. And navigate to log in page again, It will navigate me straight to inbox just as if I have cookies but the folder doesn't have .txt cookies file. just (index.dat). Is this means we must restart the program to this to take effect? (Works if you restart it) If so, how can I turn off webbrowser1 for a sec and turn it back? or something like that just to make sure it takes effect without me reopening the program.
how to create this certain program. In short, I must calculate the velocity of a ball thrown in the air after 1, 2, and 3 seconds. The formula for this is: -16t^2 +velocity(t)+height. the height for the ball is 5 feet per-second. So after defining each textbox of 1 sec, 2 sec, and 3 secs (Dim stuff) I need the button click to run through the formula then display the result for each second. How would I do this?
View 6 RepliesHow do you clear the Recently Opened Program Lists in the start menu?
I've been making a computer cleaner, and I've Googeling and I guess binging so much to find an answer but i couldn't, does any1 know how?
The most I could find was: [URL]
BTW I know how to clear it, but I need to know with VB code.
i am making a program that can paint something.the painting code is easy to do, but i cannot find out how can i make the clearing of what i have drew.in this code u can see that i made it on the mouse click/down and while moving it it will draw a line.
private shouldpaint as boolean = false
Private Sub Form1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseDown
[code]......
I have built up an interface in VB2008 with many textboxs and labels on. When I click "New", I would like to clear all the textboxs and labels, i.e. each with a NULL value. Meanwhile, I also would like to clear all the arrays behind the program, i.e. the arrays which are not shown on the interface but is important for the calculation.The only way I could find out now is to clear the textboxs, labels and arrays one by one. So if there are 100 textboxs, 100 arrays, I have to write 200 lines in total. Obviously, it is not expected. Is there any other quick ways to directly reset everything to the beginning when the interface is just opened?
View 5 Repliesthis is currently my code to clear my 5 textboxes
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
TextBox1.Clear()
TextBox2.Clear()
TextBox3.Clear()
TextBox4.Clear()
TextBox5.Clear()
End Sub
I am wondering how to open a specific program with the textbox contents. Here is my situation: I want the text in the textbox to be saved to a html file and then open that html file in a specific browser.
View 5 RepliesI am writing a program that loops through all of the sheets in an Excel workbook and saves each sheet as its own workbook. It turned out to be a bit trickier than I expected, since the Sheet.Copy method creates a strange object (see here for the MSDN discussion that I believe is relevant: [URL]. Anyway, I found a Stack Overflow post [URL] that got me to where I am, which is essentially complete, outside of one hanging EXCEL.EXE process that is left after the program completes, which I believe is a result of the sheet.copy method creating a new workbook (potentially a new application as well?). The other thing I run into, which I believe is related to this, is that even though I have my application set to visibility off, when I run the program, excel still opens up and is visible going through the steps.
Here is my code:
Code:
Imports System.Data
Imports System.IO
Imports Microsoft.Office.Interop
[CODE]...
Now I think the problem comes from the end of the loop, where I try to close the export file and the new worksheet it creates:
Code:
'close excel and release com objects
System.Runtime.InteropServices.Marshal.ReleaseComObject(exportsheet)
exportsheet = Nothing
xlApp1.Workbooks(fileNames(counter - 1)).Close(False)
I can't figure out what to do to release the `ComObject` for the new worksheet that is created. I have been trying all sorts of things, but it always throws a COM error when I do it and if I try to define it as nothing (like I do with exportsheet) is says that it is read only by default, so I can't do it. It seems like it should be something as simple as: System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp1.Workboo ks(fileNames(counter - 1))) But that is not the case. I have tried a few variants of this and I am thinking it has to do with the MSDN link above, but I can't quite sort out what to do. So the code works for my purposes, outside of leaving one EXCEL.EXE after it is done. As far as a test file, I am just using an Excel file with 3 sheets and I put some information on each and change the sheet name, so it is easy to see if it is working or not.
I am writing a program that loops through all of the sheets in an Excel workbook and saves each sheet as its own workbook. It turned out to be a bit trickier than I expected, since the Sheet.Copy method creates a strange object (see here for the MSDN discussion that I believe is relevant: [URL]
Anyway, I found another Stack Overflow post that got me to where I am, which is essentially complete, outside of one hanging EXCEL.EXE process that is left after the program completes (check the update for one more issue that came up, but I think they are related).
Here is my code:
Imports System.Data
Imports System.IO
Imports Microsoft.Office.Interop
Imports Office = Microsoft.Office.Core
[Code]......
Final Update: On the off chance that some poor soul ran into the same issue I was running into, the first update should solve it, but it is also important to note that the excel.exe will hang until you close the application. I am report automation code as a windows form application (so coworkers can give the file location and such) and there is going to be an excel.exe process running until you close the pop up window from the program. Maybe garbage collect does not run until you close the application window or it just hangs on to an instance of excel.exe for some other reason.
I have a timer that runs every time by itself, and for the code the runs in it I would like to have it clear the dataset before it does anything, the timer runs every 10 seconds, so I tried to do dataset.clear but it would crash if the dataset had no values
View 4 RepliesI copied word content to richtextbox without loosing format perfectly...but now i am editing the content in the richtextbox ...now i want to copy the richtextbox content to word document without loosing any format.
View 2 Repliesapplication i'm developing in school.I am trying to make the program detect when the user copies new content to the clipboard,when this happens I want the program to check the data type,
I want text content to be written to a text file.Images can be left alone.if a file or folder is copied, i want the location of the copied file and the file name to be written to a text file.
I only really need help in getting the program to detect a clipboard modification, preferably with the AddHandler statement.