What is the purpose of adding a try catch condition that simply throws the Exception?
Sample Code (Note: The db object is proprietary code that simply uses ADO.Net):
[Code]....
I get this error in the browser:
Code:
Thread was being aborted.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Threading.ThreadAbortException: Thread was being aborted.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[ThreadAbortException: Thread was being aborted.]
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +486
System.Web.ApplicationStepManager.ResumeSteps(Exception error) +501
System.Web.HttpApplication.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +123
System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +379
Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053
I have try{}catch(Exception ex){} in the right place:
Code:
protected void Button1_Click(object sender, EventArgs e)
{
try
{
// all processing occurs inside here
}
catch(Exception ex)
{
}
}
I even created a global.asax file and on the Application_Error event, I wrote a code that would email me the error (and i'm not getting an email regarding that error when I get the error shown above). I know for a fact that the thread is going inside the "try" statement because I send emails to myself whenever it finishes certain codes inside of it. So how come I'm getting that error in my browser instead of it being handled in my "catch" statement? I have two problems here, one, why is the exception not going to my "catch" statement, and two, why am I getting that error in the first place.
Note: my web app calls a webservice.
I have simple 3 tier web application and have mostly CRUDE functionalities. Recently I required to add new console application to the existing solution in which I call data layer methods for retrieving data from DB but I get an exception "The type initializer for threw an exception."When I debugged I found that the exception is thrown at datalayer on first line of class where I get connectionstring from
web.config, the code is public static readonly string CONNECT_STRING =
ConfigurationManager.ConnectionStrings["DbConnectString"].ConnectionString;
Now if I hardcode the connection string value like public static readonly string CONNECT_STRING = "Data Source=XYZ;uid=sa;password=XXX;initial catalog=ABC;"
it works fine.I don't understand what is the issue here as web application works fine with this datalayer.
Do I have to use the 'Try Catch' condition or possibly find ways to catch the error myself? Do you use the Try Catch all the time, when, why not?
View 7 Repliesevery now and then my server throws an exceeption. When it first starts to throw an exception the server wont work until I reinstall my web app (copy and Paste). I think this forces a restart of IIS and somethiong gets cleared bercause the app is working again for some hours, sometime less. Now I have created a scheduled task recopying all the web site files every 15 minutes. This restarts the server and the users are able to use the site. Problem is that now the server either start throwing exceptions, or the user is kicked because the server restarts. So you see, this is absolutly not a good solution.I have looked in the Event Viewer on the sever. Her is some examples of the exceptions:
[Code]....
An other exception:
[Code]....
As you can see, the common part of all the exceptions is the Exception message: Unable to cast object of type 'System.Int32' to type 'System.String'. Her is the code of one of the places throwing an exxception:
[Code]....
We have an old asp application that instantiates a .NET com visible class. In this class, we do some serialization to store our object in the session.
When I call the following line of code in my test class, it works fine.
var cereal = new XmlSerializer(couponApplicator.GetType());
However, when it gets called in the website and I am debugging, it throws the following error:
{"Cannot execute a program. The command being executed was "C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\WINDOWS\TEMP\rwot-yx9.cmdline"."} System.SystemException {System.Runtime.InteropServices.ExternalException}
I thought maybe it was permissions related so I tried giving 'EVERYONE' full control to the windows/microsoft.net folder as well as the windows/temp folder. For reference, I am running this on a Windows XP machine.
i have this (simple) code
<% Html.RenderAction("Version", "Generic"); %>
in my masterpage of my asp.net mvc 2 app. This method returns the version of the application.
i also have this code in my controller:
class GenericController : BaseController
{
[ChildActionOnly]
public string Version()
{
try
{
string assemblyFile = Assembly.GetCallingAssembly().FullName;
FileInfo fi = new FileInfo(assemblyFile);
string version = fi.LastWriteTime.Year.ToString( ) + fi.LastWriteTime.Month.ToString() + fi.LastWriteTime.Day.ToString();
return version;
}
catch (Exception e)
{
return "1.0";
}
}
}
Now i get this error:
Execution of the child request failed. Please examine the InnerException for more information.
and the innerexcpetion is:
{"The controller for path '/Account/LogOn' was not found or does not implement IController."}
What i was thinking is that maybe the code can't execute because the user is not logged on yet, and tries to redirect to the logon method etc.
So the first thing i was thinking is to grant access in the web.config (like i do with the directory that has the css and images in it, it should also be accessable when you're not logged on:
<location path="Content">
<system.web>
<authorization>
<allow users="*" />
</authorization>
</system.web>
</location>
but what is the path for this (version) method ?
(or maybe there is another reason for the excpetion.
After googling for couple of days, I really cannot solve described issue. Hope here will find a solution
I'm using attached code when calling WCF service on the same server. I get Timeout error randomly in call WebReq.GetRequestStream()
When I'm check netstat I see that connection remains open, so probably is there a problem, but I don't know how to solve it
//request inicialization
HttpWebRequest WebReq = (HttpWebRequest)WebRequest.Create(url);
WebReq.Method = "POST";
WebReq.ContentType = "application/json; charset=utf-8";
WebReq.ContentLength = buffer.Length;
WebReq.Proxy = null;
WebReq.KeepAlive = false; //also tried with true
WebReq.AllowWriteStreamBuffering = false; //also tried with true
//this produces an error
using (Stream PostData = WebReq.GetRequestStream())
{
PostData.Write(buffer, 0, buffer.Length);
PostData.Close();
}
//open and read response
HttpWebResponse WebResp = (HttpWebResponse)WebReq.GetResponse();
Stream Answer = WebResp.GetResponseStream();
StreamReader _Answer = new StreamReader(Answer);
WebResp.Close();
//return string
return _Answer.ReadToEnd();
Timeout is thrown mostly after some 10 seconds of idle time, but also after five or so requests in the row. Really cannot find a pattern.
What could be wrong with this code? Is there any other (better) way for calling WCF service?
I have a custom authorization attribute, that basically check if the current user's role is equals to the current area name, and if not, redirect them to the signup view in that requested area. (dummy role provider at this this stage, therefor check it against the user's name at the moment)
It runs fine (IIS) but when I debug it I can see a Security Exception are being thrown by the code
The code:
[Code]....
I have several text boxes in an asp:Panel. When the user hits Enter from any of those boxes, I want the form to submit as if they've clicked btnAddTag. (When the cursor is not in those boxes, I have a different default submit button.)
The aspx:
<asp:Panel id="thePanel" runat="server">
<asp:Button ID="btnAddTag" Text="Add Tag" runat="server" />
</asp:Panel>
The vb:
tagPanel.DefaultButton = btnAddTag.UniqueID
The exception:
The DefaultButton of 'tagPanel' must be the ID of a control of type IButtonControl.
The value of btnAddTag.UniqueID is ctl00$phMain$btnAddTag (there's a master page, this section is called phMain).
I've also tried CType(tagPanel.FindControl("btnAddTag"), Button).UniqueID.
I am using Membership.DeleteUser("username",true) method to delete the user from DataBase. This works fine in my local machine. When i publish the same code, i am not able to delete the user..... it throws an javascript error saying..... "Login failed for user NT AUTHORITY/NETWORK SERVICE"
View 5 RepliesI have a date field in a typed dataset that created from database.
I get an NULL Value exception when I try to enter some null value. I am not able to set the Nullvalue property of the DateTime field in XSD to other value other than Throw Exception.
The following code listed on the bottom is a dropdown extender contained with a listview insert template. The code works fine however int VS 2008 Debug mode, its throwing the exception:Microsoft JScript runtime error: Sys.InvalidOperationException: Handler was not added through the Sys.UI.DomEvent.addHandler method.If I click ignore or continue, the taret label is properly populated with the appropriate value. Has anybody encountered this and is
<td>
<asp:Label ID="lblTest" style="height:25px;border: solid 1px black" runat="server" Text='<%#Bind("TestCode") %>' Width="90%"></asp:Label>
<asp:DropDownExtender ID="ddExtTestCode" runat="server" TargetControlID="lblTest" DropDownControlID="pnlTestCode"></asp:DropDownExtender>
<asp:Panel ID="pnlTestCode" runat="server" style="display : none; visibility: hidden;">
<asp:LinkButton runat="server" ID="Option1" Text="12345-New York" CommandArgument="12345" OnClick="OnTestCodeSelect"></asp:LinkButton>
<asp:LinkButton runat="server" ID="Option2" Text="45678-New Jersey" CommandArgument="45678" OnClick="OnTestCodeSelect"></asp:LinkButton>
</asp:Panel>
</td>
In Asp.net application. i cache a Linq to Xml result to a Cache object. when i cast the cache object back to generic list. i get the following exception.
[A]System.Collections.Generic.List`1[CarRentalAddress] cannot be cast to [B]System.Collections.Generic.List`1[CarRentalAddress]. Type A originates from 'mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' in the context 'LoadNeither' at location 'C:WINDOWSassemblyGAC_32mscorlib2.0.0.0__b77a5c561934e089mscorlib.dll'. Type B originates from 'mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' in the context 'LoadNeither' at location 'C:WINDOWSassemblyGAC_32mscorlib2.0.0.0__b77a5c561934e089mscorlib.dll'.
My code looks like this.
if (!Page.IsPostBack) { if (Cache["xml"] == null) { DataSet ds = new DataSet(); ds.ReadXml(HttpContext.Current.Server.MapPath("~/CarRentalAddress.xml")); var grid = (from d in ds.Tables[0].AsEnumerable() orderby d.Field<string>("City") where d.Field<string>("Enabled") == "1" select new CarRentalAddress { City = d.Field<string>("City"), HotelName = d.Field<string>("HotelName"), Address = d.Field<string>("Address"), EmailID1 = d.Field<string>("EmailID1"), EmailID2 = d.Field<string>("EmailID2") }).ToList(); Cache["xml"] = grid; totalrows = grid.Count().ToString(); grdAddress.DataSource = grid; grdAddress.DataBind(); } else { //Exception is thrown by this line var grid = (List<CarRentalAddress>)Cache["xml"]; totalrows = grid.Count().ToString(); grdAddress.DataSource = grid; grdAddress.DataBind(); } }
I am working on application which is deployed in UK environment. But the machine which I am using has US as dateculture.
I always face issues while running application on my machine as some of the functionality which involves date doesnot work and throws exception.
I tried to google on the datetime conversion issue but it did not help.
Can any one please guide me about the changes to be done so that the application works fine in both US and UK environments?
iam inserting record in three tables in a database, iam using begin trans , commit transaction and rollback,
i want to use throw method, if any value insert wrong, pls correct me, i want to throw the error and
its go to rollback
running = false;
int updaterec = DBmgr.ExecuteNonQuery(CommandType.Text, "update ASArrivedcontainer set billgen ='Y' where billgen ='y' and acontinerid in ("+SelValues+")");
if (updaterec > 0)
{
running = true;
DataSet BillContainerDetails = BillingDetails();
byte[] ContainerDetails = GenerateBill(DBmgr, sContainerIds, rcno,isGeneralRCNo, FetchContainerDetails, ModifyId,ref BillContainerDetails);
DBmgr.CreateParameters(6);
//string otherchargesId = obj.retriveSingleRecord("select top(1) ModifyId from ASOtherCharges");
DBmgr.AddParameters(0, "@InvoiceNo", "1","IN");
DBmgr.AddParameters(1, "@BillDate", DateTime.Now.ToString("yyyy/MM/dd hh:mm:ss tt"), "IN");
DBmgr.AddParameters(2, "@CustomerId", "1", "IN");
DBmgr.AddParameters(3, "@TotalAmount", "10000", "IN");
DBmgr.AddParameters(4, "@OtherChargesId", ModifyId, "IN");
DBmgr.AddParameters(5, "@ContainerDetails", ContainerDetails, "IN");
String BillNo = DBmgr.ExecuteScalar (CommandType.Text, "Insert into BillMaster(InvoiveNo,BillDate,CustomerId,TotalAmount,OtherChargesId,ContainerDetails) values (@InvoiceNo,@BillDate,@CustomerId,@TotalAmount,@OtherChargesId,@ContainerDetails)
Select @@Identity ").ToString();
if (!String.IsNullOrEmpty(BillNo))
{
running = true;
DBmgr.CreateParameters(4);
for (int i = 0; i < BillContainerDetails.Tables[0].Rows.Count; i++)
{
BillContainerDetails.Tables[0].Rows[i]["BillNo"] = BillNo;
DBmgr.AddParameters(0, "@Billno", BillContainerDetails.Tables[0].Rows[i].ItemArray[1].ToString(), "IN");
DBmgr.AddParameters(1, "@rcno", BillContainerDetails.Tables[0].Rows[i].ItemArray[2].ToString(), "IN");
DBmgr.AddParameters(2, "@acontinerid", BillContainerDetails.Tables[0].Rows[i].ItemArray[3].ToString(), "IN");
DBmgr.AddParameters(3, "@bflag", BillContainerDetails.Tables[0].Rows[i].ItemArray[4].ToString(), "IN");
//string value = BillContainerDetails.Tables[0].Rows[i].ItemArray[0].ToString(); ;
// string strsql = "insert into billcontinerdetail(billno,rcno,acontinerid,bflag) values(@billno,@rcno,@acontinerid,@bflag)";
String count = DBmgr.ExecuteScalar(CommandType.Text, "insert into billcontinerdetail(billno,rcno,acontinerid,bflag) values(@billno,@rcno,@acontinerid,@bflag)Select @@Identity").ToString();
if (count > 1)
{
running = true;
}
else
{
}
//running = true ;
//break;
}
DBmgr.CreateParameters(6);
for (int j = 0; j < BillContainerDetails.Tables[1].Rows.Count; j++)
{
DBmgr.AddParameters(0, "@billcontkey", BillContainerDetails.Tables[1].Rows[j].ItemArray[1].ToString(), "IN");
DBmgr.AddParameters(1, "@ratetypcode", BillContainerDetails.Tables[1].Rows[j].ItemArray[2].ToString(), "IN");
DBmgr.AddParameters(2, "@days", BillContainerDetails.Tables[1].Rows[j].ItemArray[3].ToString(), "IN");
DBmgr.AddParameters(3, "@amount", BillContainerDetails.Tables[1].Rows[j].ItemArray[4].ToString(), "IN");
DBmgr.AddParameters(4, "@level", BillContainerDetails.Tables[1].Rows[j].ItemArray[5].ToString(), "IN");
DBmgr.AddParameters(5, "@sflag", BillContainerDetails.Tables[1].Rows[j].ItemArray[6].ToString(), "IN");
// string strsql = "insert into billratedetail(billcontkey,ratetypcode,days,amount,level,sflag)values(@billcontkey,@ratetypcode,@days,@amount,@level,@sflag)";
String count = DBmgr.ExecuteScalar(CommandType.Text, "insert into billratedetail(billcontkey,ratetypcode,days,amount,level,sflag)values(@billcontkey,@ratetypcode,@days,@amount,@level,@sflag)Select @@identity ").ToString()
;
i am almost finished up with a website and i have used this try catch block only in few places. now what i want is that i want to catch all the exception so that i can report the same through mail.. is it possible in any way to catch all the exception in one place and mail it cause now writing this block everywhere will be a kind of tedious process?
View 4 RepliesWhat i would like to do is catch any exception that hasn't been handled in the web application then send the user to a screen saying something like
"Were sorry this has crashed"
And at the same time send the exception to our ticketing systems.
I am assuming I need to put it in the the global.cs somewhere just not sure where?
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.
In Asp.net (c#),i'm not able to catch exception(FileNotFoundException) properly... i don't know the reason..Actually File s not there..But catch statement fails to catch the exception..here is the code..
try
{
System.Drawing.Image imgg1 = System.Drawing.Image.FromFile(Server.MapPath("").ToString() + "\images\img1.jpg");
} [code]...
This problem is trivial to duplicate. Do any query on a table which contains a timestamp / rowversion column. Set a breakpoint and examine the resulting query in the Linq to SQL visualizer. Click on Execute which displays the results in a DataGridView. For each row you get "System Argument Exception: Parameter is not valid" when it tries to display the timestamp / rowversion in the grid. What is most annoying is that there is no way to get out of the visualizer without going to Task Manager and killing the Visual Studio process, devenv.exe.
This is definitely a bug. How can you presume to be able to display a database query when you can't display an essential datatype like timestamp / rowversion? Is there any way around this ? I would like to add that in general the CLR is woefully inadequate in the way it handles timestamp / rowversion fields. It would be nice if they could be defined, copied, compared, displayed and serialized in some standardized automatic way.
AjaxControlToolkit.ToolKitScriptManager.OnInit() throws thread abort exception for every aspx page. I have an asp.net 2.0 Ajax application, where I have set the following properties of ToolScriptManager on my pages.
<ajaxToolkit:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" EnableScriptGlobalization="true"
EnableScriptLocalization="true" CombineScripts="true" EnablePageMethods="true">
<Scripts>
I have this configuration on all the aspx pages in my application. When I checked the .NET CLR exception Performance counter I figured out a large number of exceptions, mainly one exception per page load is occuring. On running windbg I was noticed that
AjaxControlToolkit.ToolKitScriptManager.OnInit() has the following code block which is getting executed. The OutputCombinedScriptFile() returns true. But since I am setting my controls on DesignTime still designmode is set to false for toolkitscriptmanager.
if (!DesignMode && (null != Context) && OutputCombinedScriptFile(Context))
{
// This was a combined script request that was satisfied; end all processing now
Page.Response.End();
}
I am not sure if this is a reported bug or even a bug with ajax, but this is causing havoc in my load test results as I have around 3 hundred thousand HTTP requests to be handled per day out of which 80% are aspx page requests resulting in a large number of threadafbortexceptions, thus affecting the performance.
I have ObjectDataSource and GridView on one of the pages of my asp.net web project.
To initialize ObjectDataSource i use Init event:
protected void ObjectDataSource1_Init(object sender, EventArgs e)
{
ObjectDataSource1.EnablePaging = true;
ObjectDataSource1.TypeName = "CustomerDataSource";
ObjectDataSource1.DataObjectTypeName = "Customer";
ObjectDataSource1.SelectMethod = "GetCustomers";
ObjectDataSource1.UpdateMethod = "Update";
ObjectDataSource1.SelectCountMethod = "GetCustomersCount";
ObjectDataSource1.MaximumRowsParameterName = "maximumRows";
ObjectDataSource1.StartRowIndexParameterName = "startRowIndex";
}
Somewhere in DAL:
public static List<Customer> GetCustomers(int maximumRows, int startRowIndex)
{
try {
... some select to database here...
}
catch (Exception ex)
{
Utils.LogError(ex);
throw ex;
}
}
Now let's imagine that GetCustomers for some reason throws an exception. How could i catch this exception and handle it? I know i can use Application_Error, but i would like to catch this exception somehow on my page and show some friendly message to the user.
A developer has created a custom control in ASP.NET using VB.NET. The custom control uses a repeater. In certain scenarios, the rpt_ItemDataBound event is encountering a data error. My goal is rather than having the user see the yellow screen of death, give the user a friendlier error explaining exactly what the data error is. I figured I would be able to use a Try/Catch block as shown below throw the exception, however, it appears that the event has nowhere to be thrown to and stops executing at the "End Try" line.
Protected Sub rpt_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles rpt1.ItemDataBound, rpt2.ItemDataBound
Try
ProcessBadData...
Catch ex As Exception
Throw ex
End Try
End Sub
In VB.NET, I can find where the repeater's DataSource is being set, however, I can not find a DataBind event. how I can capture the exception in this ASCX control so I can report it to the user? Edit: The stack trace looks like this. There is another repeater within the repeater that is actually causing the error (rptOther) and I'm able to catch the error, but I can only throw it to the rpt_ItemDataBound. I can't figure out how rpt_ItemDataBound is getting called without a DataBind event.
at Company.WebForms.Control.rptOther_ItemDataBound(Object sender, RepeaterItemEventArgs e)
at System.Web.UI.WebControls.Repeater.OnItemDataBound(RepeaterItemEventArgs e)
at System.Web.UI.WebControls.Repeater.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem)
at System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource)
at System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e)
at System.Web.UI.WebControls.Repeater.DataBind()
at Company.WebForms.Control.rpt_ItemDataBound(Object sender, RepeaterItemEventArgs e)
just added reference to jquery minified and block ui on my page through scriptmanagerproxy and it throws error on page load.
<asp1:ScriptManagerProxy ID="ScriptManagerProxy1" runat="server">
<Scripts>
asp:ScriptReference Path="~/script/jquery-1.2.6.min.js" />
<asp:ScriptReference Path="~/script/jquery.blockUI.js" />
<asp:ScriptReference Path="~/script/Default.js" />
</Scripts>
</asp1:ScriptManagerProxy>
