i have the following code which show error from a string when there is a error
is there any way that i can make this in catch block?
main()
{
try
{
if (a==1)[code].....
Like below:i have the following code which show error from a string when there is a error
is there any way that i can make this in catch block?
main()
{
try[code]....
How/Can I Set the try, catch statment to catch a specific Error. For example i am getting the following error:
Exception Details: System.Data.SqlClient.SqlException: Incorrect syntax near '='., [SqlException (0x80131904): Incorrect syntax near '='.]
Basicly The = is part of my SQL string which points to a table that currently doesent exist. I want something like catch ex as SqlException (0x80131904) or catch ex as SqlException = "0x80131904" or even catch ex as System.Data.SqlClient.SqlException = "Incorrect syntax near '='." I just want something so i can put "table doesnt exist" in the error message without having to use:
catch ex as System.Data.SqlClient.SqlException
As i have other code on my page that could result in a different type of sqlExeption.
no Massagebox not working in the web
at catch I want appear windows and retuen to....
tryÂ
{
}
catch (Exception ex) {Console.WriteLine("Error reading from", ex); }
I have tried this on two different controller methods now, and both times, even if the linq2sql doesn't allow the data to be saved, the code never jumps into the catch block.
I've watched the noun object in the middle of the trace, and the isvalid property is false, but the modelstate isvalid is true. Either way, the code never jumps into the catch block.I'm pulling my hair out about this. I feel like it will be something really silly.
The code all works similar to nerd dinner.
NounRepository nounRepository = new NounRepository();
Noun noun = new Noun();
try[code]...
I'd rather not have to add code in this manner though, as it seems like an unnecessary duplication.
I have to call the function, when exception occured. Is it possible to call the function in Catch block (Try-Catch)? I have tried it but the function did not get invoked. What i have to do for it? Shall we unable to call the functions in Catch block? I have shown my code below.
Try
Catch ex As Exception
ErrorHandlers.LogErrorDetails(ex, Session("UserId").ToString, "")
Throw ex
End Try.
I knew, We can invoke this function in Finally block but i do not need as per my requirements.
When to write try catch block?
Should I write it for each method or only in event handlers or ????
What happens when an exception occurrs? What is the stack for exception?
If I use it at entry point (event handlers) then how do I get actually at which line error occurred?
Suppose an exception was thrown from Data Access Layer How do I get it in presentation layer that exactly in which class method at which line why that error occurred?
Is it true that excessive use of try catch makes application slow?
Possible Duplicate:
Performance Cost Of ‘try’
I am being told that adding a try catch block adds major performance cost in the order of 1000 times slower than without, in the example of a for loop of a million. Is this true?
Isn't it best to use try catch block as much as possible?
Can somebody show me a better approach of looping through a Try -Catch statement. I have something like this:
Try
dbConn.Open()
Catch ex As Exception
errmsg = ex.Message
End Try
I need to try to connect 5 times before logging an error. My first thought was to nest Try - Catch 5 levels but I didn't like that idea. I'm sure there is better solution to it.
is final run if htere is a return in catch blobk ?
example
try{
}catch(){[code]....
Since everyone yells at me that MessageBox doesn't work when the project is uploaded to the server, I need to migrate to javascript alert box. As I was changing my MessageBoxes, I tested and found that they weren't being produced. I'm not sure if it matters, but they are in a try/catch block, which is shown here:[Code]....
This all worked before when I had MessageBox - it showed, then the page redirected when I clicked Ok.
I either don't understand how try/catch works, the javascript isn't adding, or Response.Redirect is executed before I can see the alert box and click Ok on it.
(just as a note, everything works fine, but the alert box doesn't show)........if I add the (javascript) code before the try block, the alert box comes up, so it's not something wrong with the writing of the javascript or executing it at least (I think).
I wrote a stored procedure call with the format:
bool isValid=true;
using (OracleConnection myConn = new OracleConnection(connectionString))
{
OracleCommand myCmd = new OracleCommand("sproc", myConn);
myCmd.CommandType = CommandType.StoredProcedure;
myCmd.Parameters.AddWithValue("p1", a1);[code].....
Second format just doesn't feel right but I am not that experienced. I am curious if there is any downfall to that other than exception not being type specific.
I am trying to call a JavaScript function from my ascx control code behind in the catch blockI have tried the below two ways but they don't seem to work.
Page.ClientScript.RegisterClientScriptBlock(typeof(string), "script", "test();", true);
ScriptManager.RegisterStartupScript(Page, GetType(), "err_msg", "alert('error');", true);
while doing debugging i found a blue dotted corner around catch block, while hovering it is showing system.exception...what does it mean and what to do
View 1 RepliesHere is the code copied from [URL] In asp.net code behind, I use try-catch try to catch any error but never catch it. In SQL database, if I rename Employees to Employeesx or change column DepartmentID to DepartmentIDx, record will not be deleted (it is right) without any error (it is wrong, suppose catch an error).
CREATE PROCEDURE DeleteDepartment
(
@DepartmentID int
)
AS
BEGIN TRANSACTION
DELETE FROM Employees
WHERE DepartmentID = @DepartmentID
IF @@ERROR <> 0
BEGIN
ROLLBACK
RAISERROR ('Error', 16, 1)
RETURN
END
DELETE FROM Departments
WHERE DepartmentID = @DepartmentID
IF @@ERROR <> 0
BEGIN
ROLLBACK
RAISERROR ('Error', 16, 1)
RETURN
END
OMMIT
regarding one issue I am facing. I created a httpmodule for hadling the unhandled errors and I need to log those errors using log 4 net in database.Everting working fine but I am not getting any error information once the error was hadled and I need that info too. I want to make it as a centralize module which can trap all errors and log those errors.How call application_error event of httpmodule from catch block...so that I can log that info there and I no need log in every catch block..
View 1 RepliesIn the Script documents that asp.net automatically generates how can I surround the whole generated scripts with try/catch statement to avoid 'Microsoft JScript Compilation error'
My issue is: i got a DevExpress control (ASPxGridView) that added and set-up in run time, since i activated the grouping functionality in the grid I still get JS error says ';' expected whenever i use (click) on one of grouping/sorting abilities, I activated script Debugging for IE, in the JS code turns out that there is no missing ';' and once i click ignore for the error msg that VS generates every thing works fine, and surly end-user can't see this msg so i figured out if i try/catch the script that may help avoid this error.
I am making use of 3-Tier architecture while making my project. And in Data Access Layer I am making use of application block, but application gets a connection string from web.config; but ClassLibrary of Data Access Layer doesn't contain web config file. How can I access connection string from Data Access layer?
View 5 Repliesi want to display the errors in a seprate page so in catch block i redirected the execption to that page, in all the pages it's working fine, but if get any error in my db retuning datas means, im' getting redirect loop in browers itself not redirecting to the page i needed. how to fix this??
View 5 RepliesIn my SP (Sql Server 2005) I'm raising an error usingRaiserror ('No Records Fetched' , 16 ,1)I want to catch this particular error in ASP.NET.. how do I do it ?
View 2 RepliesWhy would my try-catch block still be throwing an error when it's handled?
MemoryStream.Seek(6 * StartOffset, 0)
_MemoryStream.Read(_Buffer, 0, 6)
Catch ex As IOException
// Handle Error
End Try
I have the code below which I now need to figure out how to not only display but also email it all to my email, this way should any user encounter a error we get to see exactly what is it.
Catch ex As Exception,lblInformation.Text = ("<h4>Unable to save data in database</h4>" + vbNewLine + "The error was '" + ex.Message + "'" + vbNewLine + vbNewLine + "The SQL Command which falied was:" + vbNewLine + "<strong>" + mySQL + "</strong>" + vbNewLine + "Please contact the Service Desk to report this error.").Replace(vbNewLine, "<br />" + vbNewLine) [code]...
in a new line above "booInsertedRecord = False" and then creating a new "Dim objEMail New MailMessage()" but then realised that won't work because it's msg is defined in the catch so not to sure what steps next to take.It's been a while since I used VB and I didn't need to use anything like this
Edit - @tzup ToString() shows
[The error was 'System.Data.SqlClient.SqlException: The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value.The statement has been terminated.at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
Im using Google Analytics Dashboard Control which are available at [URL] Issue is its working fine when im connected to internet but if im using it on a machine that doesnt have internet access then it shows Server Error in '/' Application. The remote name could not be resolved: '[URL]' I want to catch this exception and shows a friendly message to user. Im calling these dashboard control on my View in an iframe like this <iframe src="../../GoogleAnalytics/Visitor.aspx" height="275"></iframe> and if i place try catch in Visitor.aspx page it doesnot catch the exception. How should i catch this exception, Im using asp.net mvc 2 with c#
View 3 RepliesIs there a way to catch a database exception and then redirect to an error page? I have a data access class that I use to make a sql connection and then functions that call it to execute my SQL commands. My problem is that if my database is not available I cannot catch that error. Here is the code I am using in my class:
Protected Function GetConnection() As SqlConnection
Dim ret_conn As SqlConnection
ret_conn = New SqlConnection(System.Web.Configuration.WebConfigurationManager.ConnectionStrings("EUCNET00617").ToString())
ret_conn.Open()
GetConnection = ret_conn
End Function
I keep getting this error message after upgrading an application from .net framework 3.5sp1 to 4.
The thing is, the block is well formed!
Code:
Line 1: <%@ Page Language="vb" AutoEventWireup="false" CodeBehind="~/Default.aspx.vb"" Title="DRL Manufacturing" Inherits="PrototipoJTSConsultasInventario._Default" %>
First I found that you can catch it and log it inside a catch, but this doesn't send an email.
Then I found out about using the Error Signal class. That worked, however what wasn't apparent from reading, is that it treats the error like normal, so when I signal the error it goes to the custom error page still, I don't want that to happen. What I want to do is catch that error, log it, send the email, but stay on the page the error happened so I can provide special feedback. I do not want it go to the custom error page.
EDIT: This is what I have and it redirects me to the custom error page.
Try
smtpClient.Send(mailMessage)
Catch smtpEx As SmtpException
errorSignal.FromCurrentContext().Raise(smtpEx)
Catch ex As Exception
errorSignal.FromCurrentContext().Raise(ex)
End Try
Edit: Posting my web.config sections that involve Elmah (besides the connection string hah)
And there is nothing in my Global.asax file involving Elmah.
<configSections>
<sectionGroup name="elmah">
<section name="security" requirePermission="false" type="Elmah.SecuritySectionHandler, Elmah" />
<section name="errorLog" requirePermission="false" type="Elmah.ErrorLogSectionHandler, Elmah" />
<section name="errorMail" requirePermission="false" type="Elmah.ErrorMailSectionHandler, Elmah" />
<section name="errorFilter" requirePermission="false" type="Elmah.ErrorFilterSectionHandler, Elmah" />
</sectionGroup>
</configSections>
<elmah>
<security allowRemoteAccess="1" />
<errorLog type="Elmah.SqlErrorLog, Elmah" connectionStringName="Elmah.Sql" applicationName="Web Main" />
<errorMail from="xxx" to="xxx" cc="xxx" subject="main website error" async="true" smtpPort="25" smtpServer="xxx" userName="xxx" password="xxx" />
<errorFilter>
<test>
<and>
<equal binding="HttpStatusCode" value="404" type="Int32" />
<regex binding="FilterSourceType.Name" pattern="mail" />
</and>
</test>
</errorFilter>
</elmah>
<httpHandlers>
<add verb="POST,GET,HEAD" path="errors/admin/elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" />
</httpHandlers>
<httpModules>
<add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah" />
<add name="ErrorMail" type="Elmah.ErrorMailModule, Elmah" />
<add name="ErrorFilter" type="Elmah.ErrorFilterModule, Elmah" />
</httpModules>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true">
<add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah" preCondition="managedHandler" />
<add name="ErrorFilter" type="Elmah.ErrorFilterModule, Elmah" preCondition="managedHandler" />
<add name="ErrorMail" type="Elmah.ErrorMailModule, Elmah" preCondition="managedHandler" />
</modules>
<handlers>
<add name="Elmah" path="elmah/admin/elmah.axd" verb="POST,GET,HEAD" type="Elmah.ErrorLogPageFactory, Elmah" preCondition="integratedMode" />
</handlers>
<httpErrors>
<remove statusCode="404" subStatusCode="-1" />
<remove statusCode="500" subStatusCode="-1" />
<error statusCode="500" prefixLanguageFilePath="" path="/errors/error.asp" responseMode="ExecuteURL" />
<error statusCode="404" prefixLanguageFilePath="" path="/global/404.aspx" responseMode="ExecuteURL" />
</httpErrors>
</system.webServer>
<location path="errors/admin/elmah.axd">
<system.web>
<authorization>
<deny users="?" />
</authorization>
</system.web>
</location>
