VS 2005 Change A Datatype In Access, Datagrid Doesn't Work
Aug 18, 2010
I have a VS2005 utility that I'm working on that has an Access 2003 backend. A couple of days ago, my boss asked that I change one field in two tables from TEXT to MEMO, to allow more information to be put in. In doing some final pre-deployment testing, I find when I hit my button to pull up the list of tickets, I get the error
"System.Data.ConstraintException was unhandled
Message="Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.""
The datagrid is based on a query I have in the database. The query runs fine, and when I go through the XSD and go into Query Builder, the QB is also returning data. I have made the various changes to the utlity as suggested by Microsoft, but no luck. When I put the two columns back to TEXT, the Grid works fine.
How the heck do I set it up so that the grid will recognise the new data format? The number of characters for the individual columns is set to 37,627 (I believe, it's whatever the default is). I only have 200 characters in my test data. I need to rebuild the whole dataset - this deployment has to be done by the end of the day tomorrow and I have a whole pile of other stuff left to do.
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Jun 12, 2011
I am trying to change the background color of a tooltip
I am using tooltip.backgroundcolor = color.colr
No errors but thecolor doesn't change
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Jul 29, 2010
This Module doesn't work on Windows 7 x64.What I should change?The module is : Runpe.
vb.net
Imports System.Runtime.InteropServices
Imports System.ComponentModel
Public Class rp
[Code]...
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May 14, 2011
I'm trying to update my database, I'm using access 2003, my problem is that for some reason I can update the first row but when I try to update any other rows after that I keep getting an error saying Column 'ProductID' is constrained to be unique. Value '7' is already present.
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Dec 19, 2010
I am a complete beginner with Visual Basic, I am attempting to continue where the original creator left off. His project is finished but he didnt (and still doesnt) have time to fix a couple of bugs with his code....Basically, he has written a small VB application that closes SWF flash files if the CRC matches from a list... So when an SWF is loaded into explorer the SWF is hash checked and then closed if it matches from the "hashcheck.txt" file.
All is working apart from 2 small bugs:
1) %^&{}[]#`� - dont work.Ive found that If there is any of these charactors in the folder or filename structure the file doesnt get checked/closed.
2) Network paths do not work.. (maybe is part of above bug?)
N: est_folder estfile.swf <-- works perfectly
\pcshare est_folder estfile.swf <-- doesnt work
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Mar 12, 2012
I'm having trouble getting this sub to work on Windows 2003. It works on Windows XP and Windows 7. Windows 2003 has "wininet.dll".
change_proxy("123.115.112.222:3128")
*********************************
Public Sub change_proxy(ByRef proxy_port As String)
[Code].....
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Dec 21, 2011
add user to access database but it's doesn't work the problem here
SavInto.ExecuteNonQuery()
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May 7, 2009
I have a problem with Oledb connection when I am trying to open an Excel spreadsheet:
[code]...
This piece of code works well on one computer, but on another the IMEX=1 doesn't seem to work, and the Jet seems to read the first few rows of the Excel spreadsheet that are numeric and decides that the whole spreadsheet is numeric, so it ignores some String values later in the sheet.
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Sep 21, 2011
I have two tables say "Table1" and "Table2". I made a UNION query and saved it as "AllTimesFailure". It is worth mentioning, I am using Access DB. When I am trying to fetch the records from AllTimesFailure through oledbDataReader, it says "The Microsoft Jet database engine cannot find the input table or query 'AllTimesFailure'. Make sure it exists and that its name is spelled correctly.". I double checked query name and found correct but the problem still exists. when I run the same query as I pass through my command object, it works fine in Access query analyzer and fetches records normally.
[Code]...
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Mar 15, 2009
I've used this in a couple of places and it simply doesn't work. Despit the try event, VB.Net still crashes or throws up an error.
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Oct 24, 2010
I have a field on my form for Check Number if a bill was paid by check, if not it should be blank. When I run the query in Access it returns the right records.the query loads all current customers, 99 out of a possible 107, when I navigate through the records as soon as I hit one where a Check was used, the Check Number field stays filled in for all records displayed after.
vb.net
If Not dsForm.Tables(0).Rows(dbCursor).Item(1) Is DBNull.Value Then
Me.txtRentalID.Text = CStr(dsForm.Tables(0).Rows(dbCursor).Item(1))
Me.intRentalID = CInt(Me.txtRentalID.Text.Trim.ToString)
[code]....
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Sep 3, 2010
I have 3 RadioButton on the form, and a button. in button click event i have the following line RadioButton1.Checked = False when the rb1 checked is set the false, none of the other two rb's are set to true.Which should happen by default (atleast i happens when i set the checked using mouse or keybd)
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Feb 28, 2009
Hi, I have a project that works with a database. It groups al my films per category. I use this code to group everything by category. The categories are chosen in the combobox cboCateogorie.
Private Sub cboCategorie_SelectedIndexChanged_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboCategorie.SelectedIndexChanged
If Not cboCategorie.SelectedValue Is Nothing Then
cboCategorie.DataBindings.Clear()
cboCategorie.DataBindings.Add(New Binding("Text", objDtsMuziekcollectie.tblCategorieen, "CategorieID"))
Dim dtvDVDInhoud As DataView
dtvDVDInhoud = objDtsMuziekcollectie.tblDVDInhoud.DefaultView
dtvDVDInhoud.RowFilter = "CategorieID = " & cboCategorie.SelectedValue.ToString
dtvDVDInhoud.Sort = "DvdID ASC"
objTblDVDInhoudBindingSource.DataSource = dtvDVDInhoud
Me.objTblDVDInhoudBindingSource.MoveFirst()
End If
End Sub
Now I've made a textbox and a button which I can search with. But I want that my category in the combobox changes when a film is selected with that search. Now I already have this code to search with a joker sign.
Private Sub btnZoek_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnZoek.Click
Dim dtvZoeken As DataView
dtvZoeken = objDtsMuziekcollectie.tblDVDInhoud.DefaultView
dtvZoeken.Sort = "DvdID"
objTblDVDInhoudBindingSource.DataSource = dtvZoeken
dtvZoeken.RowFilter = "Titel like '" & txtZoekveld.Text & "*'"
End Sub
Ok, so what I want is the opposite off what I do when I select a category in a combobox. Now I actually select a film and this film also has an ID, namely DvdID and with that I want that the combobox shows the category where the film belongs to.
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Feb 28, 2009
I have a project that works with a database. It groups al my films per category. I use this code to group everything by category. The categories are chosen in the combobox cboCateogorie.
category
Private Sub cboCategorie_SelectedIndexChanged_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboCategorie.SelectedIndexChanged
If Not cboCategorie.SelectedValue Is Nothing Then
[code]....
what I want is the opposite off what I do when I select a category in a combobox. Now I actually select a film and this film also has an ID, namely DvdID and with that I want that the combobox shows the category where the film belongs to.
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Dec 3, 2009
da = New SqlDataAdapter("SELECT * FROM employee_log WHERE log_datetime >='" & objdate1 & "' AND log_datetime <= '" & objdate2 & "' order by log_datetime", cn)
ds = New DataSet
[code]....
this is my code to fill a datagrid..i need to change values of one of my column in datagrid..all other colummns should be same..just change one column values only..how do i do that?in below image i need to change log_datetime values from textbox values....
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May 9, 2011
I have a query to retrieve DateDiff in my SQL:
SELECT Convert(char,DATEDIFF(m, Temp.Opening_Date, '2011-05-01')) As MonthDifference From Temp
It was successfully retrieve the data from SQL Server. But when I bind it to my vb.net datatable, the value is null. It's seems like vb.net datatable doesn't support datatype from DateDiff... What can I do?
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Mar 15, 2011
I face a problem that if i make a datattype in sql server of Integer and then use it in linq to sql query it give error of "specific cast not valid" and when i change datatype into varchar the linq to sql query work fine one more thing how to use linq to sql query to make crystal report?
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Nov 21, 2009
I have a calculate function that adds twenty text boxes together a+b, etc... 20 +20, B changes value when a selection in combobx is changed, how can i make the calculate funtion work up selection change in combobox ? You would think the selection change or index change , but that doesnt work because the tetbox doesnt actually get the new value till after the combo selection is made, so you actually have to go and make the selection twice I know i can put the code in the textbox value change , but i dont want to do that for 20 text boxes and i am assuming there must be a BETTER way?
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Dec 21, 2011
how can i access remote sql server 2005 work on windows 7 ? and in the seem time i donot like turn off firewall .
and how i can make sql server listen to it port 1433
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May 25, 2010
I'm new to webservices and xml.I've been given the task of creating a webservice with a method called UploadData. UploadData(Username as string, Pwd as string, XMLdata as String)The XMLData will be xml data 2-5mb.Is String the best data type?I've tried the stream datatype and that does not work as a parameter on a webservice.
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Feb 2, 2011
I have an application that requires data be entered, and after entering, a button is clicked to process that data. Clicking the button works just as it should--the data is processed properly. In constructing a test module, I provide a set of data values, followed by:
btnWhatever.PerformClick()
Nothing happens. I have used this syntax for years, and it has always worked flawlessly. I have triple checked everything else and isolated the problem to the failure of the PerformClick(). The PerformClick() is in a test subroutine that does nothing but fill textboxes and labels with default data, then calls the PerformClick() on the button to begin processing. Again, the button works fine, the data is entered as it should be, but the PerformClick() does not fire the click event.
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Jan 5, 2009
I have a datatable that I read xml into.
One of the columns is a date, but the dataype of that column is set to string. Is it possible to change that dataype to date?
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Sep 7, 2011
I want to change the DataType of all columns of DataTable. I don't want use the loop.. [URL]
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May 17, 2012
I'm converting a asp.net application from .NET 2.0 to .NET 3.5 I have loads of inline code like so:
Dim Total = 0
for each dr as DataRow in dt.Rows
Total = Total + dr("SumOfAmount")
next
Response.Write(FormatCurrency(Total,2))
Notice that there is no explicit type declaration of the total variable.This code worked fine under .NET 2.0 Under .NET 3.5, the Total variable is defined as an Integer, therefore the total is being rounded to the nearest dollar on every pass.I know one solution is just to change
Dim Total = 0
to either
Dim Total as decimal = 0
or
Dim Total = 0D
However I'd prefer to not have to visit every page in the system looking for this problem.Is there any site wide, or page wide option I can set the change this behavior back to the way it was under .NET 2.0?
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Dec 4, 2009
Is there a way to change a base class type by Overrides or Shadows, or other meen?[code]...
In this example there is MyBaseClasswitch is the base Class, then ClassB that Inherits from MyBaseClass, and In ClassB I try to overrides the base property "MyColl" to change is type to a enum.
But it do not work, telling me that the base collection cannot convert to eCarBrand, blah blah blah
Is there other way to change base class type or other approach that a could use?
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Jun 23, 2009
how to change column into checkbox with datatype of Boolean?
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Oct 14, 2009
Is there any way that I can use to check the datatype of an object??What I want to check is like below (yes, below will not work. Its just a scratch logic).
example:If TypeOf(objPasser) = Integer Then
.....
ElseIf
[code]...
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Aug 10, 2009
I set the phone number field to number datatype.......in the access database...the field size is set to long integer.While trying to save a data in the database, when i enter a 10 digit number then an exception is thrown but upto 9 digit it works great.
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Apr 25, 2009
Need to store JPG/GIF picture files in an access database table and then would like to retreive it and put it on a Word Document using VB 2005 code.
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Aug 6, 2009
I create one column which is tinyint then I go to VS2008 and create typed dataset by wizard. Then I check that column's datatype it is now byte datatype. MS SQL 2005 tinyint = VS2008 byte ?
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