I am very new to asp and having following problem
I am getting 2 values from 2 column, from database and when i try to multiply them, its giving following error
Error Type:
(0x80020009)
Exception occurred.
This is my code
totalPrice = totalPrice + rs("ProductQunaity") * rs("ProductPrice")
Even if someone can tell me what should be "Title" of this question, that would be great.
In case the error that amphetamachine pointed out is only in your code here at SO and not in the original code, please make sure that you don't have any type errors ( ;) ) with the values either.
totalPrice = totalPrice + CInt(rs("ProductQuantity")) * CDbl(rs("ProductPrice"))
where CInt() converts a value to an integer, and CDbl() converts a value to a double.
However, if you're very new to ASP, I'd recommend going straight to ASP.NET - ASP is a technology that hasn't developed in the last decade, while ASP.NET is Microsoft's new, fully supported (and pretty awesome) web development platform.
I'd recommend you start with ASP.NET MVC, since it is usually a lot cleaner, and it's straightforward to output the html you want. This and this are two good places to start.
Are you sure you typed that correctly?
# (what's this?) ---v
totalPrice = totalPrice + rs("ProductQunaity") * rs("ProductPrice"`)
Whenever you have errors like this, the best way to debug them is to response.write all the values out, then response.end before the line throwing the error is run. You can then inspect the values and attempt to work out why they are not compatible.
Related
I have an enumerand of around 150 entries, which I need to get into IBM Rhapsody.
Doing this by hand is clearly lengthy and error prone. I have google extensively but found only things that tell me how to edit the generated code -- not go the other way.
The question is: How is this done? And if there is no way -- please someone post that as an answer.
David,
I would jump into the Java API (plugin subsystem) and do it that way. If you haven't learned how to use the API, there is a bit of a learning curve. There are two ways to go about it: Implement a Java (or your favorite JVM language--I use Scala) app that realizes the Rhapsody Plugin framework and then you choose to package it up and deploy it so that it gets loaded when you load your model, or, if it is a one off job, do everything up to the point of packaging it up and then run it from within your IDE and you are done. If you are comfortable with Scala, I can post some code.
So what I did in the end was I edited the relevant .sbs file, used a small python program to generate the items I required, and then update the length of the array accordingly.
all_the_literals = ["enum_name = 0x4e", enum_name2 = 0xF2", ... ,]
for field1, waste, field1_value in map(lambda x: x.split(" "),
all_the_literals):
literal_string = f""" {{ IEnumerationLiteral
- _id = GUID {uuid.uuid4()};
- _name = \"{field1}\";
- codeUpdateCGTime = 5.16.2022::19:24:18;
- _modifiedTimeWeak = 5.16.2022::19:24:18;
- _value = \"{field1_value}\";
}}"""
print(literal_string)
Note the above "code" snippet purely prints the items, which you then copy-paste into the relevant field in the sbs file. YMMV -- this was the correct format for an enum in Rhapsody (and note how I fudged the update time, but it worked successfully, so you'll need to do the same if you use this answer).
Also note it's probably better to use bauhaus9's answer, but I definitely didn't have time for it.
I am working with a historical PayPal system in vb.net. I am struggling to add individual item descriptions or names for the products that the user is paying for. It is using the NVPSetExpressCheckout and the data is meant to display on the PayPal website when the user is about to pay. Instead however I am getting constant issues which I assume must be due to syntax or just the way I am trying to do it.
Here is the current code which works:
Dim ppSet As New NvpSetExpressCheckout()
ppSet.Add(NvpSetExpressCheckout.Request._AMT, Decimal.Parse(litTotal.Text))
ppSet.Add(NvpSetExpressCheckout.Request.CURRENCYCODE, "GBP")
Dim basePath As String = Request.Url.AbsoluteUri.Replace(Request.Url.PathAndQuery, String.Empty) + Request.ApplicationPath
ppSet.Add(NvpSetExpressCheckout.Request._RETURNURL, basePath & "paypal.aspx")
ppSet.Add(NvpSetExpressCheckout.Request._CANCELURL, basePath & "cancel.aspx")
I have then tried to add the a description using many methods such as:
ppSet.Add(NvpSetExpressCheckout.Request.L_DESC0, "First Item")
I however am simply getting errors like these:
'L_DESC0' is not a member of 'Encore.PayPal.Nvp.NvpSetExpressCheckout.Request'.
This issue is driving me mad and I can not find a fix. All documentation including the XML says that this is the correct way. I did try to just use the DESC field which worked however all the items just got displayed as one paragraph instead of being on separate lines. Help extremely appreciated.
Found the solution. It was due to the L_AMTn request not being submitted which is basically the item amounts. Once this adds up to the total cost it submits perfectly.
I've just been asked to look after some classic asp code, currently running on IIS6, I'm on IIS7...and the existing code is throwing up a few errors I'm not sure I'd expect. Has anything changed in the way it should behave/is there a way to make it behave like it used to so I can fix these issues as it gets rebuilt?
The first is this:
If NOT ISNULL(fieldforfiltering) then
fieldforfiltering = TRIM(fieldforfiltering)
convertbackfield = Replace(fieldforfiltering, """, chr(34))
.....
End If
This is complaining that fieldforfiltering is null on the 3rd line. This I would expect from my C# life as the whole body of the if is not enclosed, so only the first line would get run (although there is an End If, so I'd sort of expect that to work...). However, it's working on IIS6, just not IIS7.
The second is a Cint issue
totcat = rs("totcat")
totalpage = totcat / 50
...throws a Type Mismatch error on the second line. If I change it to
totalpage = CInt(totcat) / 50
...it's fine. Again, I sort of know why - but why would that work on IIS6 and not IIS7?
I'd like to get it working as it is (as it clearly does work) and then go through and fix these over the coming months...it's too big a job to do it in one go.
It sounds like you might be running with different options: Option Strict On vs Option Strict Off, for example.
I've 3 .jsp files. index.jsp and sqrtcalculator.jsp and error.jsp.
In index.jsp there's a text field and a button. In sqrtcalculator.jps there's the, well, calculator.
Now, when I leave the field empty and press the button, an expection is called, because the field is empty. And I can then reroute to an individual error.jsp site to display the errors, and exception stack like
<%= request.getAttribute("javax.servlet.error.request_uri") %>
<%= exception.getMessage() %>
<%= exception %>
etc.
Problem is, when I enter -5 in the textfield, I can't get an exception, because Math.sqrt(-5) doesn't return an error but "NaN".
How can I force it to be an exception? The idea is to reroute the user to an individual error.jsp and displaying the errors. But like I said Math.sqrt(-5) doesn't return errors or exceptions but "NaN" textstring.
I don't want something like this just FYI
<%if (NaN){
%>
<p>Nope, Square root from negative numbers is not defined!</p>
<%}
%>
Warning, the test for NaN in the previous answer is wrong (NaN is NOT equal to itself). In Java the better way to test for NaN is
if (Double.isNaN(answer)) {
// throw exception
}
alternatively
if (answer != answer) {
}
While this second version will work, it is sure to puzzle those not aware of the curious behaviour of NaN.
How about:
if (x >= 0.0) {
return Math.sqrt(x);
} else {
throw new ArithmeticException("Square root from negative numbers is not defined!");
}
Note that ArithmeticException is a subclass of RuntimeException and therefore does not need to be declared in the throws clause of your function.
It's presumably returning NaN because square roots of negative numbers are indeed defined, they're just not real numbers. Is there any reason you can't do this?
if(Double.isNaN(answer))
throw new ArithmeticException("Answer unreal");
That should tickle your exception handling code, but the source line might just be a few lines off. I've never written JSP, but that makes sense in Java.
I'm not very good in jsp but afaik you should be able to use basic java code.. so i'd check my result for NaN and throw an exception
if (NaN == result)
throw new Exception("NaN");
you'll have to adjust the if ;)
I would ask why you're using scriptlets in JSPs.
If your app really is just three pages (index.jsp and sqrtcalculator.jsp and error.jsp), then maybe it's justifiable.
But my general recommendation would be to stay away from scriptlet code in JSPs and prefer JSTL. Have those calculations done in a server-side component, using a Model-2 MVC arrangement.
If your app really consists of only three pages, re-architecting it to use Model-2 MVC would not be difficult to do. You might find that it's far more extensible that way. If you're unfamiliar with Model-2 MVC you can read about it here. If you're familiar with it, this might be a self-contained problem that's small enough to let you see where it could provide some value in future projects.
Another thought would be to add complex numbers to your calculator, because the square root of negative numbers is indeed a valid concept. It just requires imaginary numbers. Maybe your calculator needs to be extended to maximize usefulness.
I can't seem to get it to work....
if (d < 0){
throw new Exception("Negative Numbers not possible!");
}
d is a double read via d_string = request.getParameter("numberfromtextfield") and converted to double via double d = Double.parseDouble(d_string);.
This is what Eclipse is telling me: http://pastebin.ca/1691409
I have a weird problem where the "Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints." error sometimes pops up when I am trying to build my project.
The line in question throwing the error was auto-generated code in the designer file for the dataset. To find out the offending table, I used the following code:
Try
Me.Adapter.Fill(dataTable) <--Breakpoint here on the offending line
Catch ex As Exception
For Each TRow As DataRow In dataTable.Rows
If TRow.HasErrors Then
Trace.Write(TRow.RowError)
End If
Next
End Try
Funnily enough, as soon as I run the project after putting in the above code and breakpoint, the error disappears. I assume this has something to do with the code being regenerated. All data is presented successfully, and the project compiles without errors.
However, this has happened often enough for me to frustrate me. Anybody know what might be causing the error and how I can isolate it?
What unique constraint are you placing on the datatable and have you verified that the data your passing in doesn't have any duplicates? If this is coming from a shared database perhaps someone else is modifying the data which could be causing the randomness.
Edit
If that code is exactly as what you have (And forgive me my vb.net is not as strong as my C#). Wouldn't it swallow the exception? In C# we need to rethrow the error.
Add a Trace.Write() right before you go into your for loop.
You are probably working with a typed dataset, or have some code configuration on it. Also you might be reading from one table, and then adding data from another.
In any of those cases, you really want to look into any inconsistencies between the schema. If it is a typed dataset / or configured in code, check its definition, and look for anything different from the sql table. If you are reading from 2 different tables, check the definition of both tables.
Figured it out finally!
The reason the breakpoint wasn't being hit was because the code in question was auto-generated, and had the attribute "DebuggerNonUserCodeAttribute". In addition, in my VS settings, I had set the debugger to "Just my code".
When I ran the code again, and the breakpoint wasn't hit, I noticed the breakpoint icon had changed to a warning. Hovering showed this:
"The breakpoint will currently not be hit. Breakpoints cannot be set in a method or class with the 'DebuggerNonUserCode' attribute when the debugger option 'Just My Code' is enabled."
Ouch!
Once I had removed the "Just My Code" debugging option, the breakpoint was hit, and I discovered that one of the rows had a NULL value in one of the columns which had a non-null constraint. Stupid ole' me!
You should use this code before you fill DataTable :
var dt = new System.DataTable.DataTable();
dt.Clear();
dt.Rows.Clear();
dt.Columns.Clear();