I have this SQL Statement:
de.SqlStatement = "SELECT A.Name, A.Catagory , COUNT(Patient_ID) AS PNO FROM PatientApplyToAssociation P INNER JOIN Association A on A.Association_ID = P.Association_ID WHERE A.Catagory='" & "health" & " '" & "' GROUP BY A.Name '"
[code].....
I usually do something like this:
Dim Attempts = 0
Try
Retry:
<Block>
Catch
[Code]...
This is really bad looking for me, but i don't know of a better way of doing it.
I am trying to pass a LIKE parameter to a SELECT statement but receive an that strSearch is an invalid field name error:
Private Sub Search()
Dim strSearch As String
strSearch = txtSearch.Text & "%"
[code]....
I usually do something like this:
Dim Attempts = 0
Try
Retry:
[code].....
i did this Dim strUser As String = txtacno.Text cmd1 = New OleDbCommand("Select * from BookDetails Where AccountNo =@acno and MemberId=@memid", con)
[Code]...
the select query that i used in the above code,i have use and in it;so is this a valid sql statement?
When trying to use Try/Catch in my code the INSERT statement does not work, but when I comment out the Try/Catch it works fine with no error. The section of my code is below:
[Code]...
I am getting a Syntax Error in INSERT INTO Statement when trying to simply create and add a new row to the Customer table (tblCustomer). My code is as follows:[code]
View 3 RepliesI do not know Why I am recieving a TimeOutException in my code:
Dim Uri2 As New Uri("http://localhost:8733/Design_Time_Addresses/ssWcfService/Service1/")
Dim binding2 As New WSDualHttpBinding()
Dim callback = New MyCallBackClient()
[Code].....
I keep getting the following data entry enty error : Data must be numeric. I can seem to figure out what the problems, for some reason I use CDec to display the output but the integer.parse looks good I believe. This is what I have done so far.
Public Class LibraryForm
'Declare variables.
Private AverageBooksDecimal As Decimal
[Code]......
I want to check the current time with the half an hour time slots (total of 48 starts from 00:00,00:30,01:00,....23:30). Is it possible using select case statement.
I am storing the current time in an object.
Dim datime As DateTime = DateTime.Now.ToString("t")
now i need to do conditional check on this variable. under whichever the time slot the variable belongs, i need to write a value under corresponding timeslot.
I have a form that is used at design-time to configure various properties. I've tried two ways to do a form-level catch all exception:
(1) I add a handler to Application.ThreadException in the constructor.
(2) I wrap the Show method, of the form, in a Try/Catch block
Both of these work at run-time when I test by adding a property grid to a form and set my component as the SelectedObject. However, at design-time the form simply closes with no message whatsoever; neither my message nor any message explaining that there is an unhandled exception. This is not about debugging at design-time. It's about how to present the user with a friendly message when my type editor encounters an unhandled exception.
When the form loadi set the format of datetime picker as "MMM yyyy" (custom Format) for only showing month and year.then i change the month using numeric key (pressing 2) so the month is Feb . again click the drop down of the Datetime Picker unhandled Exception occurs.because date is 31 and in feb only 28 days . For avoiding this i set the date as 01 as the value change .then the event occurs muliple times(recursively calling the value change event).
View 5 RepliesI wish to populate a datagrid from a data source using parameters specified by the user. I have successfully achieved this by using the TableAdapter.Fill method with VB in VS 2010 Express. However, the potential permutation of parameters is becoming too large to have a separate Fill method for every possible combination. Ideally I would like to construct the SQL SELECT statement at run time to reflect the user's options. Can the Fill select command be set at run time, and if so, how? I only need to build the WHERE clause, and the query is read only.
View 5 RepliesIm Building a auction application and i need to catch the exceptions i.e if two people press the bid button at the same time i need to capture that exception and figure out who was has the highest bidder out of the pair of them then show the relevant message, my question is how can i achieve the above?
View 2 RepliesBackground: I wrote code that will output all the currently logged in User's Active Directory group names. I want the group name (ex: Acomp_user_BIG) via IdentityReference.Translate instead of the current user's SID's (ex: S-1-5-32-544) returned via IdentityReference.Value.
Here is code that I used:
Public ReadOnly Property Groups As IdentityReferenceCollection
Get
Dim irc As IdentityReferenceCollection
[Code].....
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:
View 1 RepliesIn the following code I open several Excel workbooks from within the VS 2010 .IDE. I want to Try the open workbook code, then Catch exceptions using a dialogbox as a form created programmatically at run-time. The exception handler works, but the dialog box does not display in front of the workbook. So, the user can't respond to the modal form. If at that point the Excel workbook is shrunk manually to expose the dialogBox which is then dismissed, Excel pops up a "Save Changes?" alert and the VB code does not resume the Sub at the Me.Focus() line
When the workbook Is open Excel is the active application. I think this is why the dialog box is not in front, and I don't know how to solve the problem programmatically.[code]...
I have a routine that has an if else statement at the else part it calls another routine. Within that routine it has a msgbox script. At the part that is actually is suppose to show the msgbox it goes back to the previous subroutine at the else statement and runs again but this time it displays. I have never seen this before.
THe code is posted below.
1 Else
2 Me.lblTurnsLeft.Text = Me.lblTurnsLeft.Text - 1
3 If Me.lbltimer.Text = "0" Then
[CODE]...
I'm having a problem with my DataGridView. When I double-click on any column, with exception to Date & Time, the grid advances by 1. As you can see the 2nd row is highlighted in blue, I actually double-clicked on the first one, under "Sent By." (See attached image)
Here is my code
VB.NET
Public Class frmPickAssignment
Dim dteStart As Date
Dim dteEnd As Date
[CODE].................................
Why can I do the following :
Dim qNodes As IQueryable(Of XmlNode) = xDoc.ChildNodes.AsQueryable()
Dim test = qNodes.Where(Function(node) True)
although the following gives the error I stated in the title :
Dim qNodes As IQueryable(Of XmlNode) = xDoc.ChildNodes.AsQueryable()
Dim test = qNodes.Where(Function(node)
Return True
End Function)
i'm using socket programming in vb.net 2005 and make a Server/Client windows application and it used in the network to multi user chat server and havent error and it work , but one BUG in server app : the Server app. work currently until the number of clients more than 30 and then it crashed . and error is "socket.exception" . now tell me what to do ??? it's very very important to me because the number of server's CRASH in on day more than 10 time and i end it and then run again and it's not good for my job .
View 5 RepliesIt looks like impossible but...
Try
Select Case command
Case 1
smth()
Case 2
[code]....
Firstly Case 2 runs. Throws exception. And right after this debugger shows that next processed statement is Case Else. Only after Case Else throws own exception Catch block start working. I've never seen this trick. Why can this happened?I'm sure the block is entered once (not like this:first enter hit Case 2 and second hit Case Else).
Update:-To Matt Wilko. Thank you for answering. I've switch to Strict On in Options of VS2010 but nothing has changed. Command is variable, not function. Watch tool shows that on each step Command is the same ( Command = 2).
Fixed. Yeeaaaahhh. I simplefy code to
Try
Select Case 2
Case 2
[code]....
and change project to Console app. This works as I mention. The fix was in Release mode. I was debugging in Release mode. When I switch to Debug mode everything goes as it should.
I have a vb6 app, the error from event view is Faulting application vb6.exe, version 6.0.81.76, stamp 3592011f, faulting module vba6.dll, version 6.0.0.8169, stamp 358b0c74, debug? 0, fault address 0x0001982e. For more information, see Help and Support Center at [URL] And a message box pop out. Exception has been thrown by the target of an invocation. The code is
[Code]...
Title pretty much says it all. How do I format the date of a dateandtimepicker to insert it into the SQL date datatype?
View 20 RepliesThe insert statement work
Code:
str = "Insert into login values('" & Format(DateAndTime.Today, "Short Date") & "','" & _
txt_user_id.Text & "','" & DateAndTime.TimeOfDay & "','None','" & remarks & "')"
Login Table Looks like this
tdate | userid | timein | timeout | remarks
i left timeout to none because the user didnt log out yet but when I try to hit logout I use this statement
Code:
str = "Update login set timeout = '" & DateAndTime.TimeOfDay & "' and remarks = '" & _
remarks & "' where userid = '" & txt_user_id.Text & _
"' and YEAR(ldate) = " & DateAndTime.Today.Year & _
[code]....
were I set timeout = currenttime but instead of saving the time to the database it saves only "0" and I dont know why it update statement returned zero and supposed to be the currenttime. I user Oledb and MS Access 2007 as database?
I have a large project where we have 2-3 dll projects that are converted from VB6 to VB.NET. We have fixed all the issues that caused compilation errors, and most of obvious issues in running, so now we have basically a program up and running. The exe is created from scratch in VB.NET, using a lot of functionality from the converted dll's (including GUI forms). What I wonder is when I run the program in debug mode, I get a bunch of warnings in the "Immediate Window" saying:
A first chance exception of type 'System.Exception' occurred in Microsoft.VisualBasic.dll
...and some of other type (but most of them in Microsoft.VisualBasic.dll).I was wondering if this is common in projects converted from VB6, or if it is caused by bad design in our code...
When I try to create a instance of a COM class it throws an exception as Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))
View 2 RepliesWhen I try to create a instance of a COM class it throws an exception as Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))
View 4 RepliesSee
Public Class Form1
Dim sql As String
Dim conn As New OleDb.OleDbConnection
Dim da As New OleDb.OleDbDataAdapter
[CODE]...
The problem, The INSERT statement works fine in the form load but not in the button click event?
When I click the VS 2010 icon to open it I get a popup box error "Exception has been thrown by the target of an invocation". I then need to right click the icon, click "Run as.." change "Current user" to "The Following user" then enter in my windows credentials and it opens fine. This is happening suddenly (Windows XP) and I don't know why. It wasn't happening before and I haven't started logging in with a different user or anything.
View 3 Replies