I have this code that will import the excel sheet to the datatable then inserts it in the database, but I have this problem.I have set the HDR to yes so that the first row will be considered as its header, but the problem now is that if the first row is null, the datatable will automatically named it's header as f1,f2 and so on. how can I set the header as null if the first row is null? so I can validate it afterwards
View 3 Repliesi want to binding excel data to a datagrid without no header, just the data.for example :my excel files consist of 3x3 matriks data in 3x3 excel cell like this
1 2 3
4 5 6
7 8 9
and i want to show all this data on data grid i have tried with some code like this
Dim MyCommand As System.Data.OleDb.OleDbDataAdapter
Dim ds As New DataSet
MyConnection = New System.Data.OleDb.OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0; " & _
[code]....
but the first row of that data ( 1 2 3 ) is not shown up in the datagrid, just the 2nd and the 3rd row that shown up in datagrid?
is there a chance that I change the header name of the exported data from gridview. Below is my code and its working fine. my only problem is I can't change the header name
My code
Dim strFilename As String = Now.Date.Month.ToString + Now.Date.Day.ToString + Now.Hour.ToString + Now.Minute.ToString + Now.Second.ToString
Response.AddHeader("content-disposition", "attachment;filename=" & strFilename & ".xls")
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I'm using the following code to populate a DataGridView with a worksheet. This is working fine, however, I'm unsure how I can get the Text from the page header. (not to be confused with the column header). Later in my code when I am exporting into an existing workbook with a new worksheet, I'm wanting to use the header text as the tab name. The header text being "September 2009" so that when I import/manipulate/export october, the new tab will be "October 2009" etc. [Code]
View 1 RepliesI use an OLEDB connection to read from an excel database, and this loop to read in all of the data from each of the columns
While reader.Read()
For i As Integer = 0 To reader.FieldCount - 1
temp = reader(i).ToString + ControlChars.Tab
output_file.Write(temp)
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Some of the columns contain date information, which are read in fine (usually as a string "2/20/2011" or so), but the headers of those columns are read in as a blank "". The headers for all the other columns read in fine, but not for the date containing columns.
I'm trying to figure out a way to validate the user data entered:
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This is in MVC3, VB.net. I'm looking for an easy way to validate a users input data into the editorfor field.
I posted earlier this week about reading in data from a csv/txt file into an array. My data is huge, 100 columns and 12000+ rows. I would like to name variables by column and then plot these variables. After I read the data line by line and delimit the row, I'm not sure how to put each integer into it's own separate column, and then continue this for the next row and the next row, ect.
After some reading I would imagine the proper way to do this would be by creating a structure and then read the data into the structure, but there's no real starter example/tutorial out there that does this. I know some people will read this and get pissy, but you've got to realize I'm coming from Matlab and vb.net is a huge change for me.
I am working on a program where I need a small database. I wanted to use XML to store the data, so I followed this tutorial:Everything there works fine. What I now want to do is figure out how to execute SQL statements against the imported data to do inserts and queries.I've searched and searched, but cannot seem to find relevant info. Every example I see needs a connection string, but that doesn't apply here as far as I can tell.
View 5 RepliesHow can I bulk copy a datagridview that has csv data imported, then export to SQL
Private Shared Sub CopyData(ByVal sourceTable As DataGridView, ByVal SQLDESTINATION As SqlConnection)
' column mappings example:
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ut refreshing a databound Combobox After New Data in Imported into the Database. As it seems not be updating Without Closing the Form Thus resetting the Binding Source. but how can i do this on the Fly Lets say on the Combobox is Clicked it dose the updated List?
Its starting to be Quite Irritating That it is dosen't seem to be affected by:
ComboBox1.ResetText()
ComboBox1.Refresh()
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Another noob question from me...one of these days I'll get the hang of this VB!I am importing data from an Access table that has four columns/fields. I have set up the relevant headings etc on the list view control...but I have also set up a 5th column as I want to have that representing the percentage change between columns 3 and 4 (which are numeric).
Here's my code. What I want to know, is that having confused myself with code I've written / adapted from advice given etc where do I put in a forumula to add something to a column in my list view that is a calculation based on two columns imported from the table?
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I am importing data from CSV file into a dataset using OLEDB data adaptor.I created a query with query builder to extract the desired data then copied the text generated into my code. Everything works as it should exepct that the seconds part of a datetime column is missing when the code is run.The odd thing about this is that the seconds part appears when i execute the query in query builder.[code]
View 3 RepliesI'm trying to calculate the average hours worked from a set of data imported from a text file using streamreader. My problem is counting the number of entries and the total hours worked imported from a text file within a loop[.
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how can VB.net validates the format of each cell on the excel file that it opens, for example, the first row should only be numeric, or cannot be null, is it possible that vb.net can check it before it inserts it in the dataset or data table?
View 4 RepliesLooking at deleting columns in excel and have found several threads that show how to delete an entire column which I have tested and done successfully. These columns were all identified by "A", "B", "C" and so on...
I was wondering if it was possible to do the same thing using the column headers. When deleting the columns in excel, one has to keep in mind that columns deleted from the left will shift the entire sheet to the left and if one is not careful, the next column[code]...
Let's say a user wants to delete the 'Middle' column (assume as column B in excel) and then delete the 'Suffix' column (assums as column D in excel). If they don't know to work from right to left when deleting columns, they would write code that would delete Column B and then repeat that code for Column D. However, once column B is deleted, all columns will shift left, which will result in the 'Phone' column (formerly column E now column D) being deleted instead of the 'Suffix' column (formerly column D now column C).
If there was a way to delete the columns by their headers (i.e. Middle, Suffix...) this would eliminate the problem; to me it seems a bit more intuitive as well.
I'm exporting an ASP.NET gridview to Excel using the following function. The formatting is working really well, except I need to freeze the header row in Excel on the export. I'm really trying to avoid using a 3rd party Excel plugin for this, but unless there's some archaic excel markup in my AddExcelStyling function.[code]
View 2 RepliesI have a template in an excel worksheet. I can successfully insert data into the worksheet and print it out with backend coding.
The problem I am facing is, the reverse empty space for the header and side is too much.
Is there any possible way to reduce the empty space?
I have an application which exports data from an Access 2007 database to an Excel 2007 worksheet automatically draws some graphs. I don't have any problems with generating the excel sheet and the graph, but i would like to also add the Date as a footer and a user name which will depend on a Login Form used to login to the application.
View 1 RepliesHow to remove image in my excel header. I generate the excel using export command using gridview as source data[code]...
View 1 RepliesI would like to kindly ask if there is a dictionary in vb.net?
I would like to validate some data from the user and their corresponding value.
e.g.
2 = ABC
6 = MNO
6 = MNO
7 = PQRS
8 = TUV
8 = TUV
3 = DEF
if the user had input the numeric data on textbox1, then the alpha phrase will show on textbox2.
What i want to run is that if i press the "execute" button, it will look for a word than can be create using these letters ( e.g COMPUTE )
Then it will display the word "COMPUTE" on textbox3.
Is there a function or method i could use to do that?
im having trouble try to validate the data in the inputbox. I am trying to make sure only integers/decimals are entered, but the code is failing to reconize it in the loop, and the loop dosent promt the user to a valid number. What am i doing wrong or this a weakness of the inputbox?
'Developer- John Nelson Date- March 5, 2012 Application Name- Semester Final Averages Purpose-This application allows an instructor to enter up to 10 project scores from a course for a semester compute a students average score. The application displays the final average for the semester with the two lowest grades removed from the average. The eight scores are sorted in order and final averages are written to a file named grades.txt
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i am creating windows form for staff registeration which this form is connected to database ,i want to put messagebox which if" Please put number in this field" in TELEPHONEtextbox.text .The reason is to inform the user that the data which user type is wrong if their type a string in this Telephonetextbox.text Any advice how i am to do it.Here is my code For your info I am using visual studio 2005 & sql 2005 as database .
Private Sub btnregister_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnregister.Click
If Me.NAMETextBox.Text.Trim.Length = 0 Then
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I would like to know that how am i going to validate the data inside a currency field to see whether its format is correct or not ?How am i going to reload the data when an action is canceled ? For example, when i click the cancel button, a message box will pop up and ask the user whether he/she want to cancel the action. When the user click yes, the action will be cancel and the data inside a database will automatically display inside the text boxes, as if everything is start from the beginning
View 5 RepliesIs there a way to access the field header name of a databound repeater within the header template. So insted of this....
<HeaderTemplate>
<table >
<th ></th>
<th >Forename</th>
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I'm at a compleate standstill with my homework here's what i have so far <summary> Validate the data from the Amount Invested TextBox. It must be at least $500 and no more than $2 million, including up to 2 decimal places. Set the MaxLength property to manage the number of digits entered.b.If Amount Invested is in the valid range, calculate the table and display it in a clearly-labeled, read-only, multi-line TextBox.c. display an appropriate message and calculate the table for an Amount Invested of $1.
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I have a combo box that contains data from a database.I am using autocomplete to assist users in finding the large amount of data that the combo box is bound to.What I need to do is check the typed data with the values bound to the box.I need to show a message box if what the user types isn't in the list. Right now if its not in the list and they tab out of the box it throws an exception.Is there a way to validate what is typed with the data in the list. I tried changing the drop down style to dropdownlist but this doesn't allow the user to type in data.
View 3 RepliesIn a Windows XP Pro environment, my system uses a mainframe emulator in a window in which a scanning application is running. The data populating the mainframe app comes from various instruments, scales, barcode scanners, etc.. The data inputs are captured by a winwedge type RS232 data aquisition software.
When all the data is processed correctly, the mainframe application sends an "operation completed" message and creates an exclamation system event associated with a specific sound to inform the user.
My goal is to create a MS Access application that would use the Exclamation system event to validate writing the barcode that was just read to a database without further querying the mainframe, creating a local database. I only want to write the barcode when the mainframe application completed and therefore played the sound.
I am working on a VB.NET windows applications. It reads data from a text file and inserts them into SQL server DB using SQL Bulk copy.I want to validate the length of all the fields in the file. The maximum length allowed for evey field is stored in tbFieldLength table. File has 50 columns and 10,000 rows and the values are separated by '|' symbol.
If the length of a value in any row is greater than the length specified in the tbFieldLength table, I want throw an error with exact row and column details. For example,saying
"Lenght of the value in Row 6, Column 20 is greater than the expected length"Also, I want to identify all the places if the error occurs in multiple locations. What is the best way to validate the length of fields in the text file?
in my application i created table called houseloading which has field called housename.which is inserted into the sqlserver database. my table will look like this
///column name house
values red
green
what i want now is i want to display the values red green as column header in datagridview
which will look exactly like this
red green
i have a data grid,, connected in ms access via code, on its celldoubleclick event i have the code
Public Sub dgv1_CellDoubleClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles dgv1.CellDoubleClick
Dim empid As Object = dgv1.Rows(e.RowIndex).Cells(0).Value
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