C# - How To Handle Exception Created By An Unmanaged Code Block
Dec 7, 2010In my code i am running an exe file through a process call. How to handle exception generated by the exe file.
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Security Exception:
Description:
The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission contact your system administrator or change the application's trust level in the configuration file.
Exception Details: System.Security.SecurityException:
System.Security.Permissions.SecurityPermission
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<% foreach( item in Model) { %>
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what is the difference between “managed” vs “unmanaged”? I am a beginner in C# ASP.net
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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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Oct 25, 2010I have 2 separate code-block asp.Net expressions in an aspx markup, with an html content between (span element in the example below). In the first code-block, there is "i" as an increment variable for the for loop.Then the code-block is cut with an html content.And another code-block expression is opened but as I see I can reach the "i" variable which was declared in the previous code-block.
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<p>
<%for (int i = 0; i < 30; i++)
{
[code]....
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Jul 12, 2010i got this exception when i done the code given below..
"Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack."
--code--
try
{
if (retVal == 0)
Response.Redirect("Success.aspx");
}
catch(Exception error)
{
Response.Redirect("errorpage.aspx");
}
finally{
}
from searching in net i found it to be a bug and if its success then we should end response... ie " Response.Redirect("Success.aspx", false); ".it works fine.. is this a good method or there is any other efficient method to handle this exception
Web Forms :: How Can The Caller Handle The Exception
Mar 21, 2011 I have a textbox that invokes a function on text changed. When the function encounters exception, I want to throw the exception back to the caller. But the problem is the caller is from .aspx file, not .cs file. How can the caller handle the exception?
[Code]....
[Code]....
C# - How To Handle Session Expires Exception
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Nov 11, 2010For example, I am using wenclient.DownloadfileAsync to download a file asynchronously.
In the DownloadFileCompleted event handler, I can check if I have any exception or not by using AsyncCompletedEventArgs.Error property.
If I re-throw this exception, however my executable is stopping running immediately.
I am wondering how to handle this kind of exeception? How to pass this exception back to the
calling thread?
AJAX :: How To Handle Async Exception Thrown In Module
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(the alert will print a message as:
Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.
Details: Error parsing near 'MyButt" />
|<html>
<head>)
at the moment my idea is to clear the response in the module and find a way to use the scriptmanager to send the correctly response of an error/exception. it's this possible? or samebody has another option of how to manage this case? note:i can't edit the aspx to manage this client client side with custom javascript
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Dec 28, 2011I am converting the entered values in textbox into decimal values to saev in sql table. In case user does not enter any value i get a Format exception. How do i handle this..
My code is as below
DMLObj.Add("ItemID", Convert.ToInt32(drpitemname.SelectedValue).ToString());
DMLObj.Add("SupplierName", Convert.ToInt32(drpvendor.SelectedValue).ToString());
DMLObj.Add("Quantity", Convert.ToDecimal(txtqty.Text).ToString());//qty.ToString());
DMLObj.Add("Unit", Convert.ToInt32(drpunit.SelectedValue).ToString());
[Code] ....
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Dec 10, 2010I made a web form in asp.net and I am using loop to add button on the page. But problem is this, I'm not able to handle event of it.
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Feb 17, 2010I've created an array of buttons like static Button[] myButtons = new Button[3];
and then creating and adding buttons to my panel like myButtons[i] = new Button();
myPanel.Controls.Add(myButtons[i]);
in my code behind.
How can I handle the events that occurs when a user clicks these buttons, like using OnClick="myMethod" with regular buttons?
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Some experts suggested Min pool size =1, I applied that but no luck.
I have attached error image.
DataSource Controls :: How To Handle Error Unhandled Exception Occurred During The Execution
May 31, 2010string connectionstring = WebConfigurationManager.ConnectionStrings["AdventureWorks"].ConnectionString;
SqlConnection con = new SqlConnection(connectionstring);
DataSet ds = new DataSet();
DataRelation dr = new DataRelation("show", ds.Tables["HumanResources.Employee"].Columns["EmployeeID"], ds.Tables["HumanResources.EmployeeAddress"].Columns["EmployeeID"],false);
ds.Relations.Add(dr);
foreach (DataRow row1 in ds.Tables["HumanResources.Employee"].Rows)
{
Response.Write("customertitle:" + row1["Title"].ToString());
foreach (DataRow row2 in row1.GetChildRows(dr))
{
Response.Write("customer add" + row2["ModifiedDate"].ToString());
}
}
Object reference not set to an instance of an object. 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.NullReferenceException: Object reference not set to an instance of an object. Source Error:
[Code]....
Line 31: Line 32: DataSet ds = new DataSet();Line 33: DataRelation dr = new DataRelation("show", ds.Tables["HumanResources.Employee"].Columns["EmployeeID"], ds.Tables["HumanResources.EmployeeAddress"].Columns["EmployeeID"],false);Line 34: //ds.Tables["HumanResources.Employee"].ParentRelations.Add(dr);Line 35: ds.Relations.Add(dr);
Source File: d:databaseDataset showing selected
field of 2 tables.aspx.cs Line: 33
Stack Trace:
[Code]....
[NullReferenceException: Object reference not set to an instance of an object.] dataset__with_two_tables.Page_Load(Object sender, EventArgs e) in d:databaseDataset showing selected field of 2 tables.aspx.cs:33 System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +15 System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +33 System.Web.UI.Control.OnLoad(EventArgs e) +99 System.Web.UI.Control.LoadRecursive() +47 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1436
Get .NET HttpContext For Isolated Code Block?
Apr 9, 2010In .NET is it possible to get the HttpContext of the current page from within an external class?
So, for example in my page test1.aspx codebehind I've got:
Dim blah As New FeedWriter()
blah.Run()
But inside FeedWriter.vb, can I get the HttpContext of test1.aspx? Or would I have to pass it in to Run()? (I'm unwilling to do the latter because FeedWriter implements an interface which will need to be re-written if it's to take arguments)