Database - Exception Occurs When Trying To View DataGridView
Nov 7, 2011
I have a very simple table in access. The data is stored from VB.NET using the OLEDB adapter. I have a second form which has just a single DataGridView which was dragged/dropped using VS2010 from the Data Sources window.When trying to view the window the first time no data is shown and the second time an exception occurs and the program closes.
[code]...
In the Immediate window after clicking the Form.ShowDialog() button this message appears: A first chance exception of type 'System.ArgumentException' occurred in System.Data.dll Also, the data does not load into the datagridview. After closing the window and then clicking the same button (Not data has been changed at all) this error appears: Input string was not in a correct format.Couldn't store <07/11/2011 00:55:06> in Time Column. Expected type is Int32.
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Jul 21, 2010
I have 2 tables loginInfo and UserInfo. LoginInfo Stores username and passwords while userinfo stores other user details such as Address,postalcode,phone etc.
I insert values into loginInfo first and if successful I enter the userInfo details. If exception occurs while entering details into userInfo i delete the loginInfo details.
This is how I do now
'login details are entered successfully
If CreateLogin(uName.uPass) Then
Try
'Create the user details
[Code]...
Is there a better way to deal with this situation? can use Transactions?
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Apr 14, 2011
Normally, i don't get this error while open form design. But I am ALWAYS get this error, when i worked on my project apx. 30 minutes.
When i get this error, i close my project, and reopen. then this error gone... "view designer" work normally and open my form. I have got 4GM ram,and when i get this error,my used ram is 2.5 gb. I am using VB.net 2008.[code...]
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Mar 12, 2010
I am trying to create a log file to log when an exception occurs (if it does) and what exceptions occured. I have posted the code I have so far. What I would like to do is be able to set the path I want it to go to (ie: C:VB ProjectLogs). I can run my code with the current Logging code but cannot find the file. Is there some sort of create command i need to use first?
Sub LogWrite(ByVal ex)
Dim time As String
Dim Path As Microsoft.VisualBasic.Logging.LogFileLocation
[code]....
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Sep 24, 2010
I have a fairly complex application which makes use of an MS Access database. My application generates some 14million entries and inserts them after each generation, into the database. The app works perfectly without any bugs(that I am aware of) apart from one problem. If I run the app and let it run the full 14million odd data entries, the app crashes some way through and gives an Out of Memory exception.
I then loaded up TaskManager and notice that the memory usage increases by about 8-15Kb per second. I have done some reading and have tried using Dispose() to get rid of any objects finished with, I have tried building in release mode and the problem remains. I'm not even really sure if it is a memory leak or something else. I am using VS2010 and my application is running in .net 4.0.
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Mar 24, 2011
I am using timers in a windows service and facing problem that anytime some exception happens ( say i unplug LAN wire from my computer ) service stops running, What i am expecting is that service should keep on running as i am catching generic exception which should catch the exception on one tick event and again work (next tick)when i plug in LAN wire (i am plugging/un plugging ) LAN wire as this service is reading database from LAN so i want to replicate a failover scneario)
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Feb 19, 2011
I'm trying to migrate (mostly mentally at this point) from MS Access to .NET for database programming. I've found one of the first tests to be fairly painful. I'm trying to recreate MS Access's datasheet view in Visual Studio.Features I use in MS Access Datasheet View that I haven't immediately found in the DataGridView I'm assuming that a DataGridView will be used to edit records as opposed to being used as a search/list only.1) Form Level BeforeUpdate Event - Here I typically run validation code2) Textbox level BeforeUpdate Event - If I'm feeling anal I'll run validation code here.
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Mar 4, 2009
I have this scenario: in a Sub I have a Try...Catch statement.Within that Try..Catch I call another sub.In that 2nd sub is also a Try...Catch.(see below for example).Now if an exception occurs in the 2nd sub's Try...Catch, which Catch gets excecuted? The 2nd one, the 1st one or both?
Private Sub sub1()
Try
..do stuff[code].....
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Oct 31, 2011
i'm using microsoft visual studion 2008.
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Apr 12, 2010
Why i'm getting this exception when trying to update a data view?
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Oct 21, 2009
I found some threads talking about this.. but when I follow the thread on where to do it.. it must be talking VS2005.. cause on vs2008 in project properties -> application tab-> I dont see View Application Events button. so I assume its moved in VS2008 ? I did find some code I guess to do the same thing.. but I wanted to make sure I do it correct.. since I have an app that a client is running and they keep getting framework exceptions and I have no clue where its coming from.
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Feb 18, 2011
Moved from Microsoft Developer Network
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Windows Debugging
[Code].....
MS has a patch for the OnListChanged event handler issue, even though it seems we have to pay to have access to it. This fix specifically addresses an error message when you press ESC to cancel adding a new row in .NET 2.0: [URL]
FIX: Error message when you try to press ESC to cancel adding a new row to a DataGridView control in the .NET Framework 2.0: "An unhandled exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll"
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Feb 20, 2011
here is my code so far:
Public Sub cmdSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdSave.Click
Dim i As Integer
[Code].....
when i click the button, i get a error message saying "Syntax error in INSERT INTO statement". as far as i can tell, i have everything i need to insert a new row into the database, and i dont see why this problem is occuring.
item(0) is an autonumber key field, so that should make a new record by itself, and i have declared the input textboxes as the data() array
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May 8, 2009
It is possible to catch an exception and throw a new exception which wraps the first exception as an inner exception: [URL] Also, if I call a function and it throws a certain error, but I catch it, will the calling code's catch handler execute? If so, and it is of a higher exception type, is this not wrapping the exception? eg I can throw exception ex of type IndexOutOfRange, log it but rethrow, catch a higher up exception and do something, or I can throw a new exception and wrap an inner exception like:
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Dec 28, 2009
Ok im getting this exception from a DataGridView control in my program.
CODE:
I can't scroll down to the lower rows and if i use the arrow keys to scroll down, i get this exception, why?
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Jul 31, 2011
I am recieving data from my database and i want to view the data in a datagridview.
So, i wrote the query:
Dim Sql as String
Sql = "SELECT workorder.ID, merk.merk, type.type, workorder.klacht, CONCAT('�', CONVERT(workorder.totaal, CHAR)) AS totaal
FROM workorder
[Code]....
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May 17, 2011
How to binding MySQL VIEW(temporary table) to DataGridView ?
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Jun 9, 2011
I want to be able to create a roster view in a DatGridView so i have all the employees down the row header and have the date of the week stored in the column header as start and finish so 14 colums in total this would be for a 7 day week. the date would be be set above the datagridview in a label. what i want to be able to do is enter in the start and finish time in the required cell and then press save and load the; employee number from the row header Date from the lable above and the start and finish time all in the Rota Table i have 2 tables Emp and Rota Emp has EmpID and EmpName and Rota has RotaID, EmpID, Date, StartTime and FinishTime.
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Aug 19, 2011
I have the following code which works fine with a datagridview..
Dim conn As SqlConnection = GetDbConnection()
Dim conn1 As SqlConnection = GetDbConnection()
Dim query As String
[code]....
Now, am working with a listview called LsvColRequestListview please how can I update the code to acknowledge the listview value...
I have on the List view
10 20 30
meaning prac_no = 10
prac_no = 20
prac_no = 30
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Jun 15, 2011
I need to create a DataGridView that will show all the bookings from each room within an SQL database.This will show the rooms down the left hand side and then the time slots in 30 min intervals as the columns.I dont want to use any thrid party controls as i need to do it for college.I have 2 tables called Rooms and Bookings this is the code i have so far
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Sets conn as new connection
Dim conn As New SqlConnection
[code]....
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Aug 5, 2009
I'm loading the results of different stored procedures into a DGV.If the second time I load I have less columns - the DGV does not clear the extra ones.Seems if I do dgv.columns.clear I mess up the DGV in general
I've got this so far
'reportDGV.Columns.Clear()
'reportDGV.Rows.Clear()
reportDGV.DataSource = Nothing
reportDGV.DataSource = caseBAL_C.runReport(reportDrop.Text)
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Mar 21, 2012
know if it possible to use a view as a datasource for a datagriview? The view is to be created from two MS Access 2007 tables.
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Feb 14, 2012
I am getting following exception while coping the row in same datagrid view control System.InvalidOperationException was unhandled
[Code]...
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Apr 16, 2010
I have a gridview in asp.net using vb 2005. on " Protected Overrides Sub Render"some of the data in the columns gets modified. when i do a view source.. and look at a column1's values it says 0010. in the render i am taking a value of ab0010 and turning it into the 0010 that is seen in the view source.. later on, there is a button_click event that goes through each line of the gridview and grabs some values. Here I'm doing a CType(gvr.FindControl("column1"), Label).Text the value is coming back as ab0010. so the question is.. the view source shows something different than what is in the viewstate?
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Mar 5, 2010
i am trying to get data from the clipboard into dataset and view it on a datagridview using the code below. The problem is that every line after the first line starts with a character (like a small rectangle) but when i run a sperate loop to view each character i do not find any unexpected asc code.
'this is the text in the clipboard
this is
a test
to get
[code]...
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Aug 18, 2011
Its working for only single row.I got the Error Message is:
"Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index"
Private Sub ViewButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ViewButton.Click
con = New SqlConnection(Constr)
cmdstr = "Select * From Mcdaily where Mcno='" & McnoCombo.Text & "' and Day(Edate)=" & Dtlog.Value.Day & " and Month(Edate)=" & Dtlog.Value.Month & ""
[Code] .....
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Nov 23, 2010
I have a Datagridview with 100 records and each records contained 15 field/columns hence it's difficult to read single record at a time completely. So my requirement is if I select a record and that particular records should display on a form or whatever
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Apr 27, 2010
I want to show rich text box data in a datagridview.
The data is stored in a access DB and when I show this data in a datagridview there is a HTML text shown.
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May 13, 2010
is there a way to view the data contents of a datagridview on screen? i mean if i have a dgv with 7 columns and 7 rows, and i can only view 5 columns and 5 rows of it when i run the program cause i have a small form,(regardless of the scrollbars) is there a way that when i click the button 'viewonscreen', the whole datagridview will be viewed on screen?
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Apr 8, 2011
Using VB2008 and Sql. I have one table and two forms. On form1 I have details view of table and on form2 I have DataGridView of the same table. What I am trying to accomplish is when i click on DataGridView is that details view changes and shows data selected in DataGridView.
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