VS 2008 - Handle Errors - DataGridView Was Filled From An Excel Sheet With A Column Of Currency
Dec 6, 2010
I'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
Problem: Calling a method which uses a cell's value from a DataBound DataGridView. Works as desired without adding an image column.When I add the image column, the method attempts to use the value from column 1 instead of column 2, as the code in the 2nd method below ("findSign") states:
I am importing an excel sheet into my sql database. Everything works fine, but I would like to read the column header in as static value. Not sure how to do this. Here is the code I am using to read the sheet in:
'Connection String to Excel Workbook Dim excelConnectionString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & MyFile & ";Extended Properties=""Excel 12.0;HDR=Yes;"""
My requirement is to read all rows of an excel-sheet in first column that are not empty, are numeric and have a length between 15 and 20.
For example: 358218033354974 359473035499561 358218036156129 354022038366247 358218032490035 359473030516492 353210040325399
This column might have a header that is not numeric and there might be empty rows. This would cause an exception when importing them via SqlBulkCopy. So i want to prefilter the correct rows via OleDbCommand.
What I have tried so far is following(C# is also appreciated): Using connection As New OleDbConnection(sExcelConnectionString) connection.Open() Dim schemaTable As DataTable = _ connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, _ New Object() {Nothing, Nothing, Nothing, "TABLE"}) [Code] .....
But this throws an exception if there are empty rows or the format of the value is incorrect. So my question is: How to restrict the rows of OleDbCommand to: Get only first column of every worksheet All values that are numeric Skip empty values Ideally only the values with a length between 15 and 20
Any way how to skip the empty rows, Or do I have to to select the whole datatable? I hoped it would be possible to do that only with one query because of performance reasons.
I have an excel sheet with image names in column A. I have a directory (with subfolders) on my network with all the images in there plus some.I need to copy only specific files from one location to another.
Apparently, an unbound datagridview control cannot be filled at design time, so I have to create rows + fill cells through code. Currently, I use the following type of code to refer to cells:
I have data exported from DataGridview to Excel Sheet but I have problem viewing the excel sheet until I log out of the Application completely. I have these code to release the link. What am I doing wrong?
'Save the workbook and quit Excel. oBook.SaveAs(sSampleFolder & WrkSht) oSheet = Nothing
I am Importing a Excelsheet(xls) in to my Application, but the date and Number column showing blank in dataset when comes to application. The values are there in Excel. Any other way to import the excel sheet to application, so that i should get all the values same as there in the excel sheet.
I'm trying to export data from a DGV to an excel workbook...
I have the code below which works perfectly and is ok (although a bit slow :*( )
What i really need to do is start a new worksheet every time there is a red row in the datagridview... i.e. the worksheet seperators are a row of red background color cells.[code]...
I am able to save the datagridview as an excel sheet but everytime I do it, the previously saved file gets replaced which I do not want. I want the file to be saved with a new name everytime.
Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click Dim xlApp As Excel.Application Dim xlWorkBook As Excel.Workbook Dim xlWorkSheet As Excel.Worksheet Dim misValue As Object = System.Reflection.Missing.Value [Code] .....
I am trying to write a code for excel so that it generates results in the last empty column on the sheet. below is a sample data of what is there:[code]
I have to provide an Excel file as an output. I have to color some of lines and make them bold.The input is based on a dynamic list (in memory) and it also could be based on CSV file that I'm already provide today (based on the same dynamic list).I'm wondering what would be the most efficient way (in terms of performance) in order to provide the colored Excel output?Should I export directly from dynamic list into Excel - or - Should I export from CSV into Excel ?
[code] objExcelAppDataSheet is the excel application's object and strTemplatePath is the path of the excel file.This excel file is like a template that i am using in my application. In this file some cells are merged. After copying to the new sheet the formatting of the sheet does not remain same. Columns sizes are changing. Why this problems occurs? Is this MS office versions issue??
[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
Do you know how can i import a sheet from Excel to Visual Basic 2008, and then save the informations in Access? I know how to save the informations in Access, but i don't know how to import from Excel.
I am trying to create a small program to use at my company. It will be used to enter in any customer information on one tab and then the next tab will be used to enter in all the products that we are returning. I would like to use an excel sheet (if there's a better way let me know) to be able to enter in multiple parts but I can't figure out how to get an excel sheet or some kind of editable table onto my form
I'm migrating to vb.net 2008 from long experience of vb6. I managed to create an Excel Sheet as an object, write data and save. How though, do I load an already created Excel file? The following code does a save, but what do I need to load a file?
ExcelSheet.SaveAs("C:UsersKochanskiDocumentsVisual Studio 2008ProjectsExcel TricksTEST.XLS")
I have some columns of my datagridview formatted as currency, set up in the designer. But after entering data, the values are not automatically formatted. Is there a setting I haven't found? Or is there code I can place in the cellvalidated event to get the cells to format properly?
I have Visual Studio 2008/VB application that opens Excel workbooks, reads all the sheets, and writes some data to a SQL database. I need an easy way to determine if a sheet has any data on it. By default most books has three sheets (Sheet1, Sheet2, Sheet3) and usually, but not always, my books have data only on sheet1. But i need to look at alal sheets to check for the existence of data. I know I can do a nested for loop from 1 to columns.count and rows.count, but that would take a good bit of time since those numbers usually are something like 256 and 65K.
Is ther some easy way to determine if there is any data on the sheet? If there is, is there an easy way to find the "first" cell with data in it?
I'm trying to build an application wich shows some info about a specific user. The info is stored in an Excell sheet.
What I want to do is this: I'll have the user fill a field with in example the logon name. Now I want the application to search the Excell sheet for that record and list the info into seperate fields on my form.
I got the following code snippet, but it shows errors in 3 places, the error is type "item name" not defined. I underlined and made bold where the errors show up below'Firstly retrieve data from Access database
Dim con As OleDb.OleDbConnection = New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=E:myDB.mdb") con.Open()
importing excel sheet data into a sql table(MS SQL 2008) via a datagrid and would like receive as much advise as possible, in order to learn more on this...
Dim DtSet As System.Data.DataSet Dim MyCommand As System.Data.OleDb.OleDbDataAdapter MyConnection = New
[Code]....
I am using this to connect my datagrid to the excel sheet and able to view the data sheet, but from here on.. I am not very sure on how to go about to transferring the excelsheet into a sql table.
I am trying to figure out how to dispay and print certain cells from an excel sheet into a vb program. i am not sure on where to start. It is a large spreadsheet but i need the ability to call a certain persons name and the information for that person then print it out.
my VB.Net desktop app writes to an Excel file. I need to set the style to a row. I can read a style of one row, but am unable to set the style in another.
