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I'm trying to make a C# (Windows Forms) application which utilizes SQLite. Anyway, my code is this :
try
{
db.Insert("COLUMN_NAME", data);
}
catch (Exception e)
{
//MessageBox.Show(e.Message);
}
I made COLUMN_NAME unique, so it throws an SQL error, intentionally. But I don't want to see the error message in a MessageBox, so I commented out the MessageBox.Show() line, but still the error message pops up. Is it a property of try / catch ? If so, how can I prevent it ?
P.S.
I know there are better ways to do this task, but it is not important. I just want to learn how to get rid of error messages in exceptions.
Thanks for any help !
I figured the problem. The line db.Insert(); itself has a try/catch block, which shows a MessageBox.
I found the code here by the way.
Thanks again for all the help !
There is RunTime error in your line at
db.Insert("COLUMN_NAME", data);
So you need to fix this.
Try by clean and then build your code. Then run the code. Sometimes dll file is not refreshed. It will be regeneratedby clean and build your code.
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I've been trying to do one last thing for an app I've been developing to help me learn c# and I don't get why its not working the number wont update after one try its very annoying and help help would be appreciated thank you :)
int num = 1;
Dispatcher.Invoke(new Action(() => Connectorbutton.Content = num += 1));
Thread.Sleep(2000);
the button is writing too only goes up one number even while its looped. I imagine its not updating the text but is in the background because I've tried to update it on the mainthread and it still wont update like I need it too. LMK if you have any ideas thank you for your time!
Do like this. Your caller block your thread.
Result
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When I tries to insert data to sqlite in window store app it gives unexpected exception in SQLite.cs file. My code looks like:-
SQLiteConnection con = new SQLiteConnection(Path.Combine(ApplicationData.Current.LocalFolder.Path, "Fav.db"));
favorities addData = new favorities();
addData.Name = Title.Text;
addData.desciption = desciption.Text;
con.Insert(addData);`
and when I click on button on which these operation are being performed run time exception arises which looks like:-
in fact this SQLite.cs file is an API which I downloaded from "Manage Nuget Package" please help me out.
Thanks & Regards,
The table doesn't exist in the database.
Use this after you create the extension:
con.CreateTable<favorities>();
The creation of the connection would be better in a using statement too.
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I'm working with code I did not write that uses Entity Framework, which is still a bit of a mystery. In a web api controller there is the code below.
try
{
sdf = sdf.sdf(sdf);
}
catch (Exception ex)
{
return NotFound();
}
GetOrderByAlternateIdentifier throws a null pointer exception when a bad orderid comes in. This halts code execution in the GetOrderByAlternateIdentifier method because the error is not trapped. I would think that my try catch above would trap it so I can send back the NotFound response, but it doesn't.
How can I get my try catch to catch the error that occurs in GetOrderByAlternateIdentifier()?
Greg
Exceptions do not halt code. My best guess at what is happening is that the Visual Studio debugger is breaking when exceptions are thrown. There is a setting that determines whether or not this happens.
However, when you are not debugging, exceptions will not halt the code. And try...catch works fine. It's well tested.
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I am presently programming a winform application in C#.
I am always a little annoyed as user when I get this exception. If the system throws this exception, why does it not tell me which directory it is talking about? Is there a way to change this error message generally. Always, for all situations. It would be far more useful if the user would get a message like: The directory name "C:\IdoNotExist" is invalid.
The behavior is probably deep down in windows though, I fear, right?
If you can predict an incorrect input from user, it's better to avoid handling it with the exceptions. You can test the directory name with the
Directory.Exists("[given_directory_name]")
and show the user appropriate message.
One way is to use try catch. Try the Code to open the file and if it throws an error run some more code instead of showing the error.
try
{
// your code
}
catch(IOException ex)
{
System.out.println (ex.toString());
System.out.println("Could not find file " + sFileName);
}
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Good Day Every one,
Can you help me produce a code to produce pop up window like return confirm? the thing is it should be inside a method not after a click.
if (a == "1")
{
//Page.ClientScript.RegisterStartupScript(this.GetType(), "messagebox", "<script>$(document).ready( function() { csscody.confirm('<br/><h1> Confirmation</h1><br/> We have currently existing Details for that Upload Proceed?<br/>',{onComplete: function(e){if(e){process();__doPostBack('ctl00$ContentPlaceHolder1$btnCommitSaving','');}}});return false;});</script>", false);
//ClientScript.RegisterStartupScript(typeof(string), "messagebox", "<script language='javascript'>alert('Continue Uploading?.');</script>");
// here a pop up message should appear if he press yes he will do the procedure if no the program will cancel the procedure
// the other one is just an alert with OK button not having Yes or no
}
i tried the code with // but its not working it just passes by it in debug mode.
im sorry but i have a very minimal understanding about javascripts. so please help me any reading materials for my future reference would be ideal but a code with explanation would be better Thank you so much!
**Edit
Honestly Speaking i really do not know why it is not working in debug mode it just passes in that statement without any pop up box that appears, im really sorry if i do not know about javascripts that's why im asking help to enlighten me, also to find a way around about this problem.
ClientScript.RegisterStartupScript
you should only do it on if you want to add the script on page first load and not after you postback and you can use javascript confirm
Page.ClientScript.RegisterStartupScript(this.GetType(),
"ButtonClickScript", "confirm('Please select date within the same month and year')", true);