C# - How To Handle All Sql Exceptions Throughout The Page
Jul 18, 2010
"I DONOT WANT TO use the default error page tachnique, because i donot want the webpage to redirect!"
yes there is the try and catch
yes there are way to add exception handling mathods overwrite for controls
but what i need is,
it may just be a simple sql command,it may be a control such as formview, it may be a control such as datagrid, whatever it may be, when an illegal entry is done into the table of the database,
"THE BIG ERROR PAGE SHOULD NOT COME!!"
instead
a label at the top of the same page (where the illegal operation is performed) should display the error like
"error caused by "this control" and the error message is "null is not allowed in this field blah blah"
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Jan 26, 2010
I'm building the standard 3-tier ASP.NET web application but I'm struggling as to where to do certain things - specifically handling exceptions.
I've tried to have a look around on the web for some examples but can't find any which go as far as a whole project showing how everything links together.
In my data-tier I'm connecting to SQL Server and doing some stuff. I know I need to catch exceptions that could be raised as a result but I'm not sure where to do it.
From what I've read I should be doing it in the UI tier but in that case I'm not sure how to ensure that the connection to the database is closed. Is anyone able to clarify how to do this? Also if anyone knows as to where I could find an example 3-tier web application that follows best practices that would be great too.
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Jan 27, 2011
Looking for best practice focused answers here with explanations.
Should the presentation layer of an ASP.Net app catch and handle exceptions thrown from the business layer, or should these be allowed to bubble out, where they can all be logged and handled uniformly in the Global.ascx's Application_Error handler?
[code]....
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Mar 2, 2011
How can we prevent page crash in asp.net? Is there any generic function or place like global.asax where we specify a file to redirect to when an unhanded exception occurs? (like we redirect to a specified page when 404 page not found exception occurs?
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May 7, 2010
I am making MSSQL stored procedure CLR calls from ASP pages. When an exception occurs, it is logged and then rethrown. In this scenario I need to be able to handle the exception (if possible) in the ASP page. Note that I cannot move away from classic ASP in this instance; I am stuck within a legacy system for this project. let me know if you know of a way to handle the exceptions in classic ASP.
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Feb 28, 2011
I have a simple method that is secured
[PrincipalPermission(SecurityAction.Demand, Role = "Administrator")]
protected void lnkClearCache_Click(object sender, EventArgs e)
{
}
If this is clicked without the role, it generates a System.Security.SecurityException: Request for principal permission failed. as expected.
I use ELMAH to handle logging for my errors, and I have a custom ELMAH event in my global.asax to transfer to the error pages in ways that preserve status codes which works correctly.
[Code]....
This works all well and fine and redirects to my error page which works properly, however instead of displaying the content as expected. I immediately get a second request for the error page but this time using the value of customErrorsSection.DefaultRedirect that does not come from my code in any way that I can see.
As far as I can tell it's almost as if when .NET raises an exception for PrincipalPermission and then lets the entire request complete, then after the request is complete it throws away the application response and instead responds with the default custom error.
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Feb 1, 2010
Is there a way to globally handle exceptions in regular ASP.NET Web Service (asmx) using ELMAH like we do it in ASP.NET web site ?
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Mar 27, 2010
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I am honestly just not sure how to handle this.
As I said, the result I want is....To Reload the Top Frame with some Error Message...whether I have to do some weird redirection or whatever. My problem lies specifically with the Global.asax file.
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Feb 17, 2010
In sqlserver2005 how to handle exceptions in stored procedures and
1)redirect to other page
2)write in to log file
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Dec 9, 2010
We have a asp.net application and want to implement logging. The first idea was to use the Application_Error method in the global.asax file.
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Mar 10, 2010
I've got a master page where I've created two content place holders ('menu content place holder' and 'main body content place holder'). I've placed several controls (drop down lists and a calendar) in one of these content place holders (the 'menu content place holder'). In my content page I've set the 'menu content place holder' to 'Default to Master page content'. In my 'main body content place holder' I've included several controls (table, labels) which depend on the user selected items in the 'menu content place holder'.
After including a reference in all the necessary places- like this:
DropDownList ddlList1 = Master.FindControl("ddlList1")
as
DropDownList;
I still get the following exception (this exception occurs in my content page):
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.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
[Code]....
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Nov 15, 2010
I am making a web application, this is my first application.I want to know when there is not a matching catch block for the exception generated and I don't want to display the exception generated, instead I want to display some message or want to forward to some other link or page, where should I write that message or how should I display this? Please elaborate me on this.
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Nov 1, 2010
I have been tasked with implementing a strategy to catch all errors in an ASP.net application which cause a user request or interaction to crash and then e-mailk this exception to a support team in advance of a user calling about the error.Some errors however are not causing the page to crash or be redirected to the custom error page but these are being emailed to the support team instead of simply being loggedMy requirement is to seperate what exception types will cause a page fail and which will not.Example I am currently receiving a System.Web.HttpUnHandledException which is not causing any page to fall over and therefore is not of relevance to the support team. this can be logged but does not require emailing.
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Sep 13, 2010
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Apr 20, 2010
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Feb 26, 2011
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Feb 23, 2010
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Nov 17, 2010
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[Code]....
I get a different 404 error page but still produced by iis7 itself ("The resource you are looking for has been removed, had its name changed, or is temporarily unavailable.").
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Aug 9, 2010
Using C#
Table
ID Name
001 Raja
002 Ramu
003 Ravi
004 Sajuee
Detail View Code:
<asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False" Height="50px" Width="125px" AllowPaging="True" EnableViewState="False">
<Fields>
<asp:BoundField DataField="ProductName" HeaderText="Product" SortExpression="ProductName" /> <asp:BoundField DataField="vehiclename" HeaderText="Category" ReadOnly="True" SortExpression="vehiclename" /> <asp:BoundField DataField="platecode" HeaderText="Supplier" ReadOnly="True" SortExpression="platecode" /> <asp:BoundField DataField="inscom" HeaderText="Qty/Unit" SortExpression="inscom" /> <asp:BoundField DataField="inedate" HeaderText="Price" SortExpression="inedate" /> </Fields>
</asp:DetailsView>
When i run the code, Details View is Displaying First ID, First Name from the table.
Detail View Displaying like this
ID 001
Name Raja
Link: 1 2 3 4
But when i click the link2 it showing errors as "The DetailsView 'DetailsView1' fired event PageIndexChanging which wasn't handled."
Details View is not displaying all the data.
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May 7, 2010
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I don't want to tightly couple them, so I think I will have to do this with Events/Delegates. I'm a little unclear as to how I would implement this, though.
A couple of examples:
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I'm trying to accomplish something similar to the ValidationSummary Control, except that I want the page to be able to display the messages as the enum feels fit.
Again, I don't want to tightly bind or rely a control existing on the Page. I want the controls to raise these events, but the page can ignore them if it wants.I'd love a code sample just to get me started.
I know this is a more involved question, so I'll wait longer before voting/choosing the answers.
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Feb 16, 2011
I have the following querystring (where kvks is dynamic):
http://api.openkvk.nl/json/SELECT bedrijfsnaam FROM kvk WHERE kvks = 27312152 LIMIT 1;
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url.append("http://api.openkvk.nl/json/SELECT bedrijfsnaam FROM kvk WHERE kvks = ");
url.append(Dossierno);
url.append(" LIMIT 1");[code]....
If yes, how can I send a querystring and return the json object on the getaddress aspx page?
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Mar 5, 2011
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Mar 22, 2011
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I have a table with id typeId and Name that contains all of the data for the drop down list (different types of service providers , (plumbers, elec)I was thinking of selecting everything from that table and then in the page applying a filter by service provider type and using that to populate the ddls.
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Aug 20, 2010
I am able to route my urls to an existing page. Here is how our scenario is currently working:
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Oct 28, 2010
I have an aspx webpage in which an user control is added dynamically as follows:
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