VS 2005 Error Handling Cast Exception?
Jul 24, 2009
I have most of the obvious user error handled with code, limits to mubers on keypress, if statement in case of input blank left blank etc.. I realize though that are infinintepossibliltys the user can perform especially with the programI am trying to create it requires ALOT of user interaction, with users inputting information (numbers in textboxes) and calculations happen on the fly, in other words there is no Calculate button after everything is input
View 4 Replies
ADVERTISEMENT
Jan 7, 2010
i did this little bit of Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]...
View 4 Replies
Aug 15, 2011
I am getting Invalid Cast Exception was unhandled.Conversion from String 'abc' to type 'Double' is not valid in the following line!
If
((xlBook.Worksheets(2).Cells(iRowIndex, iColumnIndex).Value)) = avFoundKeywordds(iSearchText)
Then
The business intent is that user enters the keyword 'abc' and clicks search button . We have defined different keywords in a xls which has 1600 rows and 16 columns . so when finding abc in any of the cells ,it has to return the value of a column#4 where the name is specified !
View 3 Replies
Sep 9, 2009
I have a Windows Form application that has a global error handler to display unexpected errors.
Namespace My
Class MyApplication
Delegate Sub ProcessParametersDelegate(ByVal sender As Object, ByVal args() As String)
[code]....
1) for the same deployed code, I SOMETIMES get line number in the displayed StackTrace error message and sometimes do not, even when the error message includes source code that I have written rather than a referenced binary. The project is compiled with a DEBUG configuration.
2) The application strangely minimizes to the tray when the error occurs (I thin it is unlikely that anyone can diagnose this issue w/o my more code posted, but I'll mention it anyways)
3) When I try to intentionally raise an error by, for example, dividing by zero hoping to test by global error handler, I get a dialog error message from the interactive debugger rather than jumping into my global error handler (which i want to debug because there is more to it than I posted.) Do you have any idea how to triggerand force teh execution of the global event handler?
View 2 Replies
Mar 10, 2011
plain how error handling scope works. What I mean by that is if I have a sub called ImportData and in there I have a for loop to go through a list of files and in the for loop I call another sub routine called CheckData. All have catch error in. If a sub has a catch error in where does it go from its call.
Private Sub ImportData
Dim iLoop as Int16
Try
[code].....
View 10 Replies
Feb 18, 2011
I have a for loop going through customers and for each customer a update a list of contacts. If there is an error updating the contacts I want it to move on to the next customer and if there is an error in the customer update I want it to move on to the next customer. At the moment if I get an error it bombs out of the routine. Here is a simple example:-
For iRows = 0 to oledscustomers.tables(0).rows.count - 1
For iContactRows = 0 to oledscontacts.tables(0).rows.count - 1
'make some changes in here.
Next
Update Contact Table
'Make changes to customer tables and save them.
Next
If I get errors in the contact for loop or the customer loop it comes out of the routine altogether. I just want it to either continue to the next contact or customer.
View 2 Replies
Aug 26, 2011
what is code i should use if i want to prevent user not to leave empty word in text box after user click save button.Oh ya, i am using visual studio 2005, databse sql 2005 .Here is my code
Private Sub btnregister_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnregister.Click
If MsgBox(" Are You Confirm", MsgBoxStyle.YesNo) = vbYes Then
[code].....
View 6 Replies
Jun 30, 2010
When we are saving into a txt file the error details there is still a possibility that we will encounter some exception, how should we handle such cases?
View 1 Replies
Feb 9, 2012
Private
Sub cmdExit_Click(ByVal
sender As System.Object,
ByVal e
[code]....
View 3 Replies
Aug 14, 2011
i am using visual studio 2005 and sql 2005 currently i am doing a system registration for staff using windows form,in the system new staff must register they detail, once user type his detail than this error is come out here i attach the picture and coding. I also highlight where is probleam come out for your info my database name is databse name is = login, table name is staff. using will put their detail in text such i write below after doing that i try to click button registe and suddenly this error come out.[code]
View 3 Replies
Dec 12, 2009
{"An error occurred creating the form. See Exception.InnerException for details. The error is: The specified module could not be found. (Exception from HRESULT: 0x8007007E)"} i got the following error...what is this error??can't figure it out.
View 5 Replies
Sep 9, 2010
I am trying to Delete an entity but am having trouble with an InvalidCastException. The debugger breaks at the Next statement in the ForEach loop.My entity class is called Material.
Dim materialsTable As Table(Of Material) _
= (New DataContext("Server=.SQLEXPRESS; Database=Materials; Trusted_Connection=yes;") _
.GetTable(Of Material)())
[code]....
View 1 Replies
Feb 16, 2011
see from the following function why I would be getting an "Invalid Cast Exception"? More specifically this is the error "Conversion from string "yyyyMMdd" to type 'Integer' is not valid." I am trying to convert a DateTime value from the database to a String with the format "yyyyMMdd" so for example October 22, 1985 would be "19851022".dbReader(fieldName).ToString("yyyyMMdd")Here is the entire function ...
Private Function GetDBReaderDateValue(ByVal dbReader As IDataReader, ByVal fieldName As String) As String
If dbReader(fieldName) Is DBNull.Value Then
[code].....
View 2 Replies
Apr 15, 2012
i know this may seam odd but I'm getting an error navigating through a datagrid of an invalid cast. The trouble is it is of the same types!! I working on customising some Sage code and in the form there is a datagrid that is populated by a series of Sage.Accounting.Stock.TraceableSOPAllocationItems (a batched stock item allocated to an SOP).
I want to give the user some further information on each item so they can decide which batch and bin to use. I want to go through each item in the grid and then go find this extra information for it. the trouble is when I go to navigate through, My VB.Net code throws the error.InvalidCastException was unhandled by user code, Unable to cast object of type 'Sage.Accounting.Stock.TraceableSOPAllocationItem' to type 'Sage.Accounting.Stock.TraceableSOPAllocationItem'.
[Code]...
View 4 Replies
Mar 9, 2010
I need to use two Invalid Cast Exceptions on one try. I need to to appear when txtNight or when txtRate has an invalid value.
Try
decCharges = CDec(txtRate.Text) * CDec(txtNight.Text)
lblCharges.Text = decCharges.ToString("n")
[code]....
View 3 Replies
Apr 26, 2012
When I attempt to open forms in the designer in the IDE, I get this error:
Exception of type System.ComponentModel.Design.ExceptionCollection was thrown.
My project is building OK. Any ideas?
View 9 Replies
Jan 6, 2011
I've seen some other responses about this and they talk about interfaces but I'm pretty sure you can do this with classes and base classes but I can't this to work.[code]....When it tries to convert whatever Activator.CreateInstance(t) returns to the base class of type Behavior I'm getting invalid cast exception. That type should be of CharacterController which is defined as a child of Behavior so why wouldn't it let me cast that?
View 2 Replies
Feb 24, 2011
I am trying to create the Proxy from the WSDL using wsewsdl2.exe [code]...
But i am getting Invalid cast exeption.Can someone please tell me how to i fix it?
I am using VS.net 2003 with WSE 2.0 V3 and Soap 1.1 installed.
View 2 Replies
Mar 12, 2011
i save image into a database correctly and now when it come to retrieving i get an error message when the photograph column is NULL.Is there any way i can check if it is null then i execute different code else it return the image.This is what i am using for now
Dim barrImg() As Byte
Dim cmdSelect As New SqlCommand("select Photograph from Personal where MyID=@ID", connect)
[Code].....
View 2 Replies
Feb 22, 2012
Here's my [code...]
On this line "db.jobs2surveys.DeleteOnSubmit(deleteJob2Survey)" I'm getting the following error.
[code...]
What exactly does this error mean and how can I fix this? I can't find much info on Google.
View 1 Replies
Jul 18, 2011
We are trying to implement a logic which we used in vb6 2 years back.User enters a business requirement in text box, we define the keywors in the script and once the button is clicked , it shld luk from the list and display a msgbox of number of keywrods found.
1. Invalid Cast Exception was unhandled error -->Warnings
2.When casting from a number , the value must be a number less than infinity -->Warnings
3.When trying to declare ,variant is not accepting and its converting it into Variant Type. Are these both same?[code]
View 1 Replies
Jan 23, 2011
Dim NSNSRC As String = WebBrowser1.DocumentText
This throws me an error although DocumentText does have a value, I have also tried a .tostring after and it still did not work.
Surrounding Code:
While DocCompleated = False
System.Threading.Thread.Sleep(0)
End While
[Code].....
View 3 Replies
Aug 13, 2009
I have declared two variables as strings strDob and strCurrentDate, Both Variables are for storing dates. StrDob is for storing Date of Birth and second is for Present date. and am executing the following code
If DateValue(strDOB) > DateValue(Date.Today) Then
and getting the error like
Invalid CastException was unhandled
Conversion from string "19/09/1987" to type 'Date' is not valid.
Error in the following code also:
iAge = (CInt(Abs(DateDiff("d", strCurrentDate, strDOB)) / 365))
Invalid CastException was unhandled
Argument 'Date1' cannot be converted to type 'Date'.
Here I need both variables as string itself. because the Dateofbirth is getting from three comboboxes.
View 3 Replies
Dec 8, 2009
I have a general question regarding best practices for exception handling. I have a class library that uses structured error handling. The functions in the library generally perform some mathematical calculations and all return a boolean value indicating whether an exception occured or not (i.e. exception occured = true, no exception = false). The actual calculated result in the function is returned as a ByRef parameter.
Anyway the input variables for my calculations are all passed to the funtions as parameters. I perform some basic checks on these inputs (e.g check that an input is not negative etc) as part of the function code. The next stage is where im unsure of the best way to do things. Using the example i just mentioned, if an input parameter is negative, I can either throw an exception such as "ArgumentOutofRange", or i can simply show a messagebox with some info about what happened. Either way i do it the function will return true. At the moment i am throwing an exception, but on reading the "Best practices for exception handling" it is recommended you dont throw an exception for things that can be checked programatically because of "performance/overhead issues".
I'm a little confused by what they mean by this. What kind of overhead are they talking about? Slower program? More disk space required? More memory required? When my functions return true, the calling methods basically drop everything and stop calculations (exit sub), so im not sure that the overhead issues they are talking about are as important to me. It seems easier and neater to throw an exception and utilize some global error strings and pass some parameters rather than copy and paste messagebox.show() all the time, and modify the text to suit the situation. Another argument for me would be that both methods of exception handling utilize a messagebox, which stops code execution until the user does something. So i cant see the issue with the performance overhead.
View 5 Replies
Apr 6, 2012
for the program I am creating I want the computer to check if the configuration file has been created or not. I wrote this function to do that but I don't how to handle a file exception. Here's my code currently but obviously it returns an error if the configuration file doesn't already exist. So how do I add a check for an exception?
Public Function CheckIfRunBefore()
Dim ConfDirectory As String
ConfDirectory = ""
Dim StreamReader As New IO.StreamReader("C:\VRAI\Conf.txt")
[code]....
View 3 Replies
Sep 29, 2009
I am currently working on my Final Project and I need to incorporate some Exception Handling. I have created one in the following code but it isn't working. I don't have any "Errors" or "Warnings" but when I run the program it says the "BadNameException was unhandled." I thought I followed the steps correctly from my book, but I am stuck somewhere. [code]
View 6 Replies
Aug 6, 2009
I initially posted this in the wrong forum. I need help getting this to run properly. I'm trying to construct a fractions calculator. In order to complete it, I need to do it like this:Using Select Case statements, four Function procedures should be called based on the operation selected. Each Function procedure will calculate the correct operation and return the Decimal value to the calling procedure. The original procedure will print the result.
Now, the result should be calculated to the hundreths place and the input values should be validated by a Try-Catch Block.And of course, I've been having trouble with how to do this. I've attempted many times and this is what I have so far:
[Code]...
View 2 Replies
Feb 22, 2010
I have been using VB6.0 to create database-driven Apps. With VB6.0, I could Dimi recordsets to read/write data from/into database tables. I could use the read data to validate textbox controls on the Windows Forms. But I when I upgraded VB6.0 Apps to VS 2008, I had problems with PowerPacks not found, Exceptional Errors etc.Most of all the problems I have experienced are:
- Overload Resolution failed because no accessible 'item' accepts this number of arguments.
- Error Code -2146825023
- Exception Snapshot - {"Item cannot be found in the collection corresponding to the requested name or ordinal."}
- Interop Errors[code]
View 3 Replies
Jan 25, 2011
I have converted vb6 code to vb.net but in vb6 I used errorHandler in VB.NET we used "Tyr and catch" block
but In catch block resume next gives an error bcoz it is not valid for vb.net
[Code]...
View 1 Replies
Aug 7, 2009
textbox1.text = "6916092, 15195440, 16107657, 1836924, 3758726, 12566463, 7526079, 7405793, 6945974, 241502, 2296476, 5130294, 3102017, 7324121, 14993507"
ColorDialog1.CustomColors = New Integer() {TextBox1.Text}
I am getting an InvalidCastException. How do I insert the value of textbox1.text into those brackets in vb.net?
View 2 Replies
