DataSource Controls :: Specific Error Messages In Try Catch Block
May 23, 2010
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.
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Similar Messages:
Feb 7, 2010
Here 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
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Jul 22, 2010
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]....
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Jan 17, 2011
In the global.asax file, I capture the error details (if one occurs) and I have it send that error detail to an email address.
I am finding that it's reporting all sorts of strange ones when the website gets hit with a crawler....or at least I think it is. ( HTTP_USER_AGENT: Mozilla/4.0 (compatible; Synapse)).
The following are common errors that repeat multiple times at the same date and time:
Error Message: Input string was not in a correct format.
Error Message: Invalid character in a Base-64 string.
Error Message: Unable to validate data.
Error Message: The serialized data is invalid.
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Jan 4, 2010
- I have a situation in which I must execute a dynamically built stored procedure against tables that may, or may not be in the database. The data retrieved is then shunted to a VB.Net backed ASP based report page. By design, if the tables are not present in the database, the relevant data is automatically hidden on the report page. Currently, I'm doing this by checking for the inevitable error, and hiding the div in the catch block. A bit kludgy, but it worked. I can't include the VB code-behind, but the relevant stored procedure is included below.
However, a problem with this method was recently brought to my attention when, for no apparent reason, the div was being hidden even though the proper data was available. As it turned out, the user trying to select the table in the dynamic SQL call didn't have the proper select permissions, an easy enough fix once I could track it down. So, two fold question. First and foremost - is there a better way to check for a missing table than through catching the error in the VB.Net codebehind? All things considered, I'd rather save the error checking for an actual error. Secondly, is there a preferred method to squirrel out a particular OLE DB error out of the general object caught by the try->catch block other than just checking the actual stack trace string?
SQL Query - The main gist of the code is that, due to the design of the database, I have to determine the name of the actual table being targeted manually. The database records jobs in a single table, but each job also gets its own table for processing data on the items processed in that job, and it's data from those tables I have to retrieve. Absolutely nothing I can do about this setup, unfortunately.
DECLARE @sql NVarChar(Max),
@params NVarChar(Max),
@where NVarChar(Max)
-- Retained for live testing of stored procedure.
-- DECLARE @Table NvarChar(255) SET @Table = N'tblMSGExportMessage_10000'
-- DECLARE @AcctID Integer SET @AcctID = 10000
-- DECLARE @Type Integer SET @Type = 0 -- 0 = Errors only, 1 = All Messages
-- DECLARE @Count Integer
-- Sets our parameters for our two dynamic SQL calls.
SELECT @params = N'@MsgExportAccount INT, @cnt INT OUTPUT'
-- Sets our where clause dependent upon whether we want all results or just errors............................
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Dec 31, 2010
I have a couple of questions on exception handling in .net: 1- Why do we have to catch specific exceptions other than the reason of displaying a particular error to the user? What if we wanted to always display a generic error to the user and not give him much details, would it be okay to catch only generic xceptions?
2- Is throwing exceptions from the data access layer to the UI layer best practice, or is it recommended to return a string or perhaps a boolean values from the data access layer to the UI layer?
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Nov 11, 2013
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); }
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Sep 27, 2010
I have a stored procedure that creates a dynamic query. Sometimes the query is not built because there are no elements in the dynamic query. When the aspx page loads the SqlDataSource throws an error that the query is malformed. How can I catch this error, and handle it with a default message, before it returns the error to the aspx page?
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Apr 22, 2010
Following is the error I am getting while accessing some of the pages on my website.
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections.
(provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
It is trowing an exception and giving the about mentioned error.
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Feb 28, 2010
i get error A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 0 - No connection could be made because the target machine actively refused it.)
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Jan 21, 2010
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.
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Aug 31, 2010
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.
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Mar 31, 2010
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?
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Aug 13, 2010
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?
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Apr 29, 2010
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.
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Feb 9, 2010
is final run if htere is a return in catch blobk ?
example
try{
}catch(){[code]....
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Jun 10, 2010
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).
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Jan 26, 2010
For error messages, validation faults etc you have
ModelState.AddErrorMessage("Fool!");
But, where do you put success responses like "You successfully transfered alot of money to your ex." + "Your balance is now zero". I still want to set it at the controller level and preferably in key-value way, the same way as errormessages but without invalidating the modelstate.
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Apr 2, 2010
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.
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Oct 22, 2010
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);
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Oct 7, 2010
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
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Mar 25, 2011
I have developed Dynamic Data application for DB administration. I'd like to show thrown exception message (when connection to db is closed) in UI friendly manner. I cant figure out where to catch this exception.
Tried EntityDataSource events in List PageTemplate - no success.
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Oct 7, 2010
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..
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Jan 29, 2010
I am using forms authentication and authorization through roleManager. I have two Roles - "Customers" and "Employees". The redirection to the default page for the "Customers" role is working fine, but I get an oledb error stating that one or more parameters are not being passed when I redirect a user from the "Employees" role. The following is the code in login.aspx that handles the authentication of the user:
If myReader.Read() Then ' We have a match
If myReader(1) Then ' This is true if an Employee and false otherwise
If Not Roles.IsUserInRole(logInUser.UserName, "Employees") Then
Roles.AddUserToRole(logInUser.UserName, "Employees")
End If
ElseIf Not Roles.IsUserInRole(logInUser.UserName, "Customers") Then
Roles.AddUserToRole(logInUser.UserName, "Customers")
End If
FormsAuthentication.RedirectFromLoginPage(logInUser.UserName, logInUser.RememberMeSet)
Else
Response.Write("Invalid credentials")
End If............................................
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May 21, 2010
I am using Asp.Net MVC 2.0 for creating a user and assigning properties to the user at the same time. I am using my Windows account to access database on my local computer. I am using pre-installed MVC code o create a user with unique user name and password. User is created OK. Then I want to add profile properties like First and Last name at the same time.
I am creatingProfileBase object:
ProfileBase profileBase = ProfileBase.Create(profileInformation.UserName);
where profileInformation is a RegisterModel and has user info.
When I am trying to:
profileBase.SetPropertyValue(.....);
I am getting the following error # 2147467259 A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Shared Memory Provider, error: 40 - Could not open a connection to SQL Server)"}
Why is my connection string works fine the first time and not working now? And how to configure connection to use TCP-IP?
I have SQL Server Browser running ander Local account and openned port in my Firewall.
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