Safety After Writing Some Data To HtmlControl?
Jul 15, 2010
I have a hidden input on my form, and my JavaScript code writes there dynamically generated string based on the user behavior on the page.Later, I access to that inpput via server side code.Many users will be using this page at the same time, so what about thread safety ?I mean, could it be possible that userA has an access to that string generated by userB ? Or maybe server will read that string from each user's Web Browser ?
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Apr 23, 2010
I have a short snippet of C# code like this:
HtmlGenericControl titleH3 = new HtmlGenericControl("h3");
titleH3.Attributes.Add("class", "accordion");
HtmlAnchor titleAnchor = new HtmlAnchor();
titleAnchor.HRef = "#";
titleAnchor.InnerText = "Foo Bar";
titleH3.Controls.Add(titleAnchor);
What I want is a way to return a string that looks like this:
<h3 class="accordion"><a href="#">Foo Bar</a></h3>
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May 4, 2010
I have a textarea HtmlControl. If I write a paragraph in it, press enter and write another paragraph I can see on the page that I have two paragraphs. But when I submit the form and then try to access the paragraphs using myTextArea.InnerHtml the value that I get is of all the text in one paragraph with out any formatting.
How do I get the text out formatted in html <p> tags?
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Dec 17, 2010
The question is, is it possible that requests for the same session are executed from multiple threads? Are methods in ASP.NET reentrant? Especially we are using AJAX which means that asychronous requests are taking place.
Would this mean to place locks around operations on objects placed inside the session?I know that locks are essential when handling static and application wide variables, but the question is is the same true for session objects?
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Jan 10, 2011
Assuming a static method like below is called from ASP.NET page,can a different thread(b) overwrite the value of s1 after the first line is executed by thread(a)?If so, can assigning parameters to local variables before manipulation solve this?
public static string TestMethod(string s1, string s2, string s3)
{
s1 = s2 + s3;
....
...
return s1;
}
Is there are a simple way to recreate such thread safety related issues?
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Dec 5, 2010
On the MSDN page for the Membership.ApplicationName property (which applies to an asp.net membership provider), it warns that although one can change Membership.ApplicationName in code, 'The ApplicationName property is not thread safe for multiple writes, and changing the ApplicationName property value can result in unexpected behavior for multiple users of an application.' They therefore recommend avoiding using it for a 'web application'.
This is because the default SqlMembershipProvider is written as a singleton. But here's my question: is it OK if all the threads in my application process are going to set Membership.ApplicationName to the same thing?
I'm thinking of having multiple applications on my IIS box, each with their own separate application pool. I want to point them to the same location, but based on the hostname, set the application provider to different things. Wouldn't this actually be OK? It might not be a thread-safe operation, but doesn't each application pool have its own process and therefore its own instance of SqlMembershipProvider? So, every thread that tried to set Membership.ApplicationName for a given SqlMembershipProvider instance would be trying to set it to the same thing (the provider that is appropriate for that hostname).
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Jan 31, 2011
I've seen some code that puts a lock around the following code:
if (!CurrentSessionContext.HasBind(sessionFactory))
{
CurrentSessionContext.Bind(sessionFactory.OpenSession());
}
ISession session = sessionFactory.GetCurrentSession();
[code]...
sessionFactory is a DI-injected singleton and the configuration uses a "web" (not "managed_web") context.
Am I correct in assuming that this code does not require synchronised access?
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Sep 29, 2010
I want to show my data on an ASP.NET page using C# in XML format
<person>
<email>a@a.com</email>
<dob>YYYY-MM-DD- HH:MM:SS</dob>
<city>XYZ</city>
</email>
</person>
Do you have any code with examples.
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Mar 7, 2011
I have a page with a gridview on it. It selects rows relevent by using a querystring id passed on from the previous page.
From this gridview, i want to write only the displayed rows to a .txt file. How can i do this?
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Apr 4, 2010
I want to write an .xml file using the following code into the App_Data/posts, why is it causing an error:
Stream writer = new FileStream("..''App_Data''posts''" + new Guid(post_ID.ToString()).ToString() + ".xml", FileMode.Create);
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Sep 27, 2010
I'm trying to find out if there is a shorter way of writing data to a view than what I am currently doing. This is what I currently have in my view:
<td>
<%
if (Model.AnnualIncome != null)
[code]...
Is there a shorter way of displaying annual income to the screen than having all the <% %>?
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Sep 24, 2010
I have an ASP.NET app that writes binary data to a SQL database. It worked fine using SQL Express, but does not ever write the data using SQL Server 2008 R2. SQL Profiler shows the binary data in the UPDATE query, but nothing happens... no errors, no data saved. Does anyone know what I'm missing? Other data types work fine.
My data type is VarBinary(MAX)...
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Jul 22, 2010
i have write data from db to .txt file,where db have large amount data,i need to wite data into file, if some error occure, then reInitiated that file and write data again without stop process.that is Continuous calling same process
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Feb 9, 2010
I was just wondering that when we insert some datainto database we can use the following method.
create a sql datasourse ,
set the conection string,
set the insert comand type,
set insert parameters,
and Set the SQL Statement like
sqldatasource.insertStatement="insert into tablename(field1, field2) values(@parameter1, @parameter2)";
and then call the datasourse insert() function,
this method is usually used for single line insertion at the end of the DB.
Now I am a starter in asp.net c#,
I want to know that if There is a way that I have lots of data like some XML file that have the same table structure as the SQL database table
and I want to write that data to the database, HOw to do it Properly,
I can Still achieve the required results by iterating through XML datarows and for each row conecting to db and inserting and then disconecting dfrom the db,
But I want to know that if there is a way to do it in one go meaning I have to conect to database only one time,
Note: I already have some data in my SQL table, there are three fields(ID Name and Nickname) the ID(primary key) is INT type and auto incremented, the name and nickname are strigns.
the xml file has the structure
<userdata>
<user>
<name>michel</name>
<nickname>micho</nickname>
</user>
</userdata>
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Aug 24, 2010
I have a web page (Provider) that creates an XML file to be send to the Requester in this fashion:
1. A Requester page needs to send an XML file to the provider page
2. Provider will read the XML file to authenticate the request
3. Provider will Create an xml file with some data.
4. Provider will send the xml file back to the Requester.
Can anyone provide sample code for both the Requestor page (step 1) and the Provider page (steps 2 & 3)
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Apr 9, 2010
I'm looking for a quick way to log some data - I seem to remember a way to write to the access log, similar to System.Out.Println() but I can't seem to remember how to do it.I can't attach a debugger, nor can I add additional information to the web app via Response.Write().Is there a simple way - a single statement with no configuration changes would be ideal - to write to either the error or access logs?
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Feb 19, 2010
I would like to read from a data reader (or other) and write to a grid of some kind one row at a time in a loop. I prefer this rather than load a data bound grid control all at once. I need to do this because I have to perform some calculations on the data before writing each row.
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Feb 3, 2010
I am getting error when i write the belwo code in the code behind.
Error: The name DataIem Does not exist in the context
protected void getHotDeals()
{
D4T.tbDealDataTable dealTable;
dealTable = dealTA.HotDeals();
StringBuilder sb = new StringBuilder();
[Code]....
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Mar 2, 2011
How to write and deploy SSIS data transfer packages. ?
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Feb 23, 2010
Having serious trouble inserting data into my db... i am able to select and display data just not write it to the database..
[Code]....
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Sep 21, 2010
I've created 2 web user controls. A = User control that displays an image, and B is the user control that hosts A. I'm trying to stream an array of bytes to A, but it seems like the Response.BinaryWrite method completely overwrites any heirachial controls (I can't see any of B's other controls besides the image).
How do I get A to just display the image from the byte stream? It doesn't come from a database, it's an image I created on the fly.
A's code:
[Code]....
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Feb 16, 2011
I've got an asp.net application (written in vb.net). I have a results page that spits out some calculations. Ineed to write out that output to MS Word. The catch is, this happens within a folder that is secured (only users that are logged in can generate
the word document).
Here's what I'm using to gen the document. This works ok when running it locally, but not when loaded to GoDaddy hosting.
[Code]....
My code seems works fine locally. However, after loading it to GoDaddy it only works on a non-secured (not subject to ASP Membership), but when trying to use it in a secured folder the page clocks and eventually closes out.
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Jun 3, 2010
i just cannot work this out... i have a gridview and when a user clicks on a row the checkbox unchecks itself... when the user clicks the row a sqldatasource.update is called from the selectedindexchanged event, problem is when it writes back to the database it writes back every checkbox as unchecked, i want just the row that's selected...
what i can't work out is i've tried putting a where clause in the sqlcommand which is something like where primarykeyID = gridview1.selectedvalue... now it won't write anything back to the database...!!!
... once i take out the where clause, it writes back to every row..!!
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Apr 19, 2010
I'm writing an asp.net site in vs2005 asp.net c#, I'm using google charts api and found a lot of disadvantages. Which tools do you use and recommend? I need charts, pies, bars and data presentation, even payed systems can be considered(<200$ per server). I used in the past the buid in reports viewer which has a lot of bugs.
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Jul 19, 2010
my nested Grid Rowupdating Event is not fired., so i want to declare event in code., how can i do this/
[Code]....
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