I have a VB 2010 Express Project, that has a DataGridView in it, that I am trying to write to a CSV file.
I have the write all working. But its slow. Slow = maybe 30 seconds for 6000 rows over 8 columns.
Here is my code:
Private Sub btnExportData_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExportData.Click
Dim StrExport As String = ""
[code].....
I save data from datagridview to text file. I also load the same data from text file into datagridview for edit and update the same thing to text file. Let say this text file i called as Drill.txt. I have another text file called header.txt which need to match its value with the value of Drill.txt file then overwrite value from Drill.txt to header.txt. Now i want to make my Drill.txt in encrypted format to prevent anyone to open that file and modify out of program. They only can modify it through the program
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I try to add the name of a certain file type into a datagridview. I like to search trough all folders and subfolders and find a certain file type. Ex. .doc, or .pdf However it dosent work.
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I need to add a DataGridView to an ActiveReports 3 file. When I add the control its not recognized as a DataGridView but rather a custom control. Can anyone help me get around this?
View 1 RepliesSo I'm working on this project. I got around 60 images or so which I need to OCR, then I'll be inputting that data into my program which formats it and inputs it within this DataGridView. Now, I need the same data to be exported into an excel file. I saw several tutorials online but none of them are current (for VB 2008 or 2010). Either that, or they're not for VB.NET Windows Form Application. [I'm using VS 2010]
I'm fairly new to Datagridview as well. Just learnt how to add data to datagridview using this tutorial:
http:vb.net-inform...ridview_add.htm I was hoping you could help me out with where to start once I get my data all set up in the datagridview?
Can anyone help me on how when I click on a button in VB, it will browse an excel file that will display its information in a datagridview..Then when I click on update after it will save the result in the datagridview in an access database.
View 2 RepliesI'm trying to export a DataGridView to a CSV file. The method I'm using works fine if all cells have a value in them. However, not all cells will have a value. This is the error I'm getting:
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I have the following code:
Public Class Payrollfinal
Private Sub Payrollfinal_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub payrollsubmitButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles payrollsubmitButton.Click
[Code] .....
And when two things happen when I try to use this code (which I modified after finding it on another site)
1. Intellisense tells me that MyDataSet is not defined.
2. When I define MyDataSet as
Dim MyDataSet as New Dataset
Intellisense tells me that I'm told that AppendText is not part of String.
I have a form that I'm writing that will run a stored procedure, present data from that stored procedure in a datagridview and then allow users to export that data to a csv file. I found the following code:
Code:
Imports System.Data.SqlClient
Public Class Payrollfinal
Private Sub Payrollfinal_Load(ByVal sender As System.Object, ByVal e As
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I have the following code:
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End Class and what intellisense is telling me is that MyDataSet is not declared (I took the code for this portion from another site and modified it to suite my needs.) I tried adding the declaration Code: Dim MyDataSet As Dataset but when I added that, where ever there is a .AppendText statement, I'm told that AppendText is not part of String.
I have a form that needs to pull a CSV file into a datagridview, which I have working OK with the code below.
VB
Private Sub FillDataGridviewWithCSV()
Dim strDirectory = Path.GetDirectoryName(ofdCSV.FileName)
Dim conString As String = String.Format(ProviderString, strDirectory)
' I extracted the provider string to a separate
' sub to make this post a little easier to read
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I have tried many different variations on converting what is in the DataGrid (or what is feeding it) into somthing I can push into the BulkCopy but have not got it to work right.
My app is moving along nicely, thanks to some searches here. However, I'm at a point where today's task is still incomplete.
I have a spreadsheet, in XLS format, that I wish to import into a DataGridView.
Here's my info: Vista Home Premium 64-bit, VB 2008 Express Edition, DataGridView1 is the visible control in the form.
I've read and tried a whole whack of code to connect to the XLS file and I always receive an error message. I will post again shortly what those messages are.
Do I need to have some version of Excel on the computer in order to import an XLS file? (I use OO right now.) If I do need Excel installed, would the Excel viewer suffice?[code]...
I have a datagridview on my form with 7 columns and a variable number of rows. It's used to track stats on games (kills, deaths, assists, etc.) The way I ended up saving it was in a .xls file for the simplicity of being able to edit it in excel as well as my program. how to import the file back into the DataGridView though.
Here's the code I'm using the save the file:
VB.NET
Private Sub exportExcel(ByVal grdView As DataGridView, ByVal fileName As String, _
ByVal fileExtension As String, ByVal filePath As String)
' Choose the path, name, and extension for the Excel file
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I've written the following sub to load a comma delimited file into my datagrid view but it's hanging up when it attempts to load the first two values into the cells of the datagridview. I think it's having trouble adding the cells to the datagrid. I have tried writting them directly using the .text of the specific row and cell but when I incremented to the next row it hung up because the row didn't exist (I think).
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I generate my xml into "variable string str" by using "dataset.GetXml" and then I write the "xml which is contained in variable str" into "file.xml" by using sFile.WriteLine(str) while 'sFile' is a stream reader"My reason for using 'writeline' instead of 'dataset.WriteXml' because I need to encrypt the 'xml stored in 'str' before I store it into file.xml.I got everything fine for the encrypted result, and so does the decrypted result as well.Here's the decrypted result of my file.xml below (I have checked it the xml value which in str before encryption and which in decrypted file.xml. They are all match well)Here is my plain xml value before it got encrypted or decrypted which I stored it in variable str by using GetXml. I don't know for sure but my xml value doesn't contain declaration "<?xml version="1.0" encoding="utf-8" standalone="yes" ?>" like common xml used to have.All the xml file which I got from GetXml is just like below (No declaration like <?xml version="1.0" encoding="utf-8" bla ?>) Book 1 2010-09-22T14:43:00.0000000+07:00
And since I think it may not cause any problem then I keep coding and decrypt it which is going well and the decrypted result is perfectly same ofcourse.My problem is, when I try to make my xml value show in Data GridView by using the code below, and run the debug, it prompt an error said "could not find the file c:laFile.xml ".
ds = New DataSet
path = System.IO.Path.GetFullPath(strFileToDecrypt)
ds.ReadXml(path)
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I am trying to populate a datagridview from a .txt file but I dont know how I can do this.Text file will include data copied and pasted from excel. So the text separator will be tab.
View 3 Repliesi need to read a CSV (txt) file that has no header and has 4 fields (all numeric), the number of lines will vary. [Code] I want to read this file into a DataGridView for proofing and later insert all these lines into an Access db with 2 additional fields added. I've been able to access, read/populate the CSV file into the Grid (code below) but I have the following problem(s): If I set the 4 column headers and other parms of the Grid at design; my sub inserts 4 more columns when it reads/populates the Grid. OR If I don't set the Headers and Parms, it reads the first line of the CSV into the Grid as Header info. [Code]
View 9 RepliesI am trying to save to an xml file using a datagridview. But its giving an error. find my code below.
i am getting this error :"Exception:Access to the path 'C:settings.xml' is denied."
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Try
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Is it possible to use a datagridview with a text file? I'm guessing I can't just link it directly like I can with a SQL or access DB. But it has the option to manually add column headings so I'm guessing there may be some way of filling it in manually - like an array or something...?
View 9 Repliesi am exporting data from datagridview to a .txt file
but where i am finding difficulty is to set up the tab width i mean the data of each row of my grid is getting transferred in to .txt file correctly but it is just the comma separated.
column heading and the row content matrix is not matching i want it to looks like a table
I am facing a "weird" problem with the DataGridView. In fact, I have a function, that loads each table of an xml file into a datagridview (27 tables all with same structure except one called Listes). In the datagridview I have a combobox column to select "type" (it's the 3rd Column, so it's index is 2 normally). The problem is that when I call the function loaddata for the first time, all work perfectly ! If I call it for a second time, to reload the data, I get an error of cast! I verified and it seems that first time I call the function the column that contains the combobox is column(2), but when I run it again automatically the indexes of the columns are changing and am getting the error, because the column that contains the combobox is becoming column (3) and that explains the cast error because the column'(2) is not anymore the combobox so the cast will fail ! What I can't understand is why it's reordering that way my columns automatically ?
Here is the code:
vb.net
Sub LoadData(Path As String )
Dim oData As DataSet
oData = New DataSet
oData.ReadXml(Path)
Dim i As Integer
Dim MaGrille As DataGridView
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Is it possible to bind a DataGridView to a text file?
View 1 RepliesWhile user edits the datagridview, it does not save changes to Access MDB file? This is not working..
TableAdapter.Update(DataGridView1.DataSource)
Instread of using SQL Connection is there a way to save and load the rows from an .INI file and if it can, mind showing me how?
View 1 RepliesI am working on this program and need read info from an access database to a DataGridView. Now that part i can do. the part i cannot do, and the code i dont know what it is, is to save or update the newly edited data to the access file.
View 6 RepliesI have a problem with sorting in datagridview. I load an xml file in a datagridview and I sort the collums for check. when I try to sort it according to it's number the sorting goes like this:
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I wanna ask a question. I already bind my text file into datagridview. But the result is not the same like my text file.
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I have been reading and testing for hours. I am trying to edit an mdb (access) database from a DataGridView, connecting both with an ADODB connection. The DataGridView populates from the mdb, but whenever I try to edit it, the new information does not get saved to the mdb. Here is the code I am using.[code]...
View 2 RepliesI have done a google and see that many people have asked the question on how to export a Datagridview to a Excel (.xls) file. For some reason I cannot seem to get it to work (i have gotton the program to open an Excel and save it, all hidden in the background). I use a bit of the coding from this source code [URL] but modified it and incorporated it into my program. It connects an OLE Database connection with the excel sheet... but what i want to do is beable to alter the sheet in the datagridview and export it back to an excel sheet. I am not trying to sound pushy when i say this but... if you download the source file i am using you will get a really good idea of my situation..
View 5 RepliesHow do I export data to CVS or XML file and save this file or convert to XLS or XLSX file?
View 2 Replies