1. Path should be physical path

2. All folder should present before you create file.

3. Previous files should be in write mode if case of overriding files.

4. Make sure permission are for writing to User of process.

5. Do not include any special character which windows do not permit in folder name or file name.

6. FILE FORMAT has nothing to do with this error most often.

7. Recheck permission if you try all above.

8. Recheck Path again .

Point #7 and #8 are most important solution and always works for me.

When ASP.NET application is first called the complete code is loaded in Memory, specially the pages in App_Code folder and they act as part of web server and not as standard PHP site where they run and loaded on each request. Hence, once this happens all static object become static in memory for each and every request your server will get. This is indeed good way to share information between all User and all request, if that help your case. But in most general case you never want to share information between user in this dynamic method, which is not permanent. Anyways, for connection it really doesn’t make a difference if you share the object as you anyways want to open connection and close it as soon as you are done. In most case you have 1 simple insert or fetch query to run. And in a website with several users at a time it hardly make a difference as Sqlconnection are open and close in jiffy and took less than 1 second in most cases. For a shopping cart which has 100 -200 order per month this case will work just fine.

However, since connection is shared, there is every possible chance that if you fire a SQL query for say Reader, it get shared with some user on some other session and this is what you don’t want. It happens to our project when we have Bulk CSV upload which usually take 30-50 seconds, but if someone during this time fires and open other page of website they start to get random Database related errors. From SqlReader is close to field “Xyz” is not available, as they tend to share the connection with other requests.

Hope you avoid those problem. The colleague who did this in our project is not working with us anymore, but hey, where ever you are , please don’t punish us like this again !!!

IRequiresSessionState

which is part of Following namespace (using for helping copy/paste )

using System.Web.SessionState;

Self reminder

["10:20","10:30","10:40"]

but it was returing something like

{“d”:”[\"10:20\",\"10:30\",\"10:40\"]“}

the difference is that it is converting the array in to string, however the ideal result can be

{“d”:["10:20","10:30","10:40"]}

But we cannot change that functionality now, so what I realise we should use the eval function of javascript to make our Jquery or whatever JSON parse you are using. So my Jquery code looks like

….

success: function(data) {
var items = [];
$.each(data, function(ind, val) {
var myobject = eval(val);
$.each(myobject, function(i, v) {                   
items.push(‘<option value=”‘ + v + ‘”>’ + v+ ‘</option>’);
});
});
}

…

this convert the String to Javascript object using Eval function. Easy enough !!!

using (SqlCommand sqlCmd = new SqlCommand(“”, Connection.MyConnection))
{
sqlCmd.CommandText = “Insert into tblTimezone (TimeZone, TimeZoneDifference, isDST) Values(@TimeZone, @TimeZoneDifference, @isDST)”;
sqlCmd.Connection = Connection.MyConnection;
sqlCmd.Connection.Open();
foreach (TimeZoneInfo tzi in TimeZoneInfo.GetSystemTimeZones())
{
sqlCmd.Parameters.Clear();
sqlCmd.Parameters.AddWithValue(“@TimeZone”, tzi.DisplayName);
sqlCmd.Parameters.AddWithValue(“@TimeZoneDifference”, tzi.BaseUtcOffset.ToString());
sqlCmd.Parameters.AddWithValue(“@isDST”, (tzi.SupportsDaylightSavingTime ? 1 : 0));
sqlCmd.ExecuteNonQuery();
}
sqlCmd.Connection.Close();
sqlCmd.Dispose();
}

Keep it simple

It was really a nice decision to choose WPF. It is not only easier for me to learn as I already have some experience in HTML and web programming, but it give me control which is best suited for programmer of my culture. With no efforts I am now able to create a better looking UI. Ofcourse I didn’t test the UI on Windowx XP yet, but otherwise it looks great. I am not going to test it on Windows XP anyways as we don’t going to support it. Once I have the UI ready. I need to now communicate with Online database. So for this I already know the solution called as Web Services. But where will I found the Web Service in Visual Studio 2010 .. oh I think they rename it as WCF.. nope, they make a new concept altogether called WCF. Hmm.. with past experience of webservice I know that it was the perfect solution for me, but again WCF is almost similar no difference to code, so what harm it does to use it. Afterall it bring some new security measure and ease. So I again learn WCF and it took me 1 hr to cover the difference between Web Service and WCF and I am up and ready with my solution.

Making game UI is really so exciting that I am now looking for opportunity to upgrade my Chess game to WPF interface. Programming is really fun with those concept of programming and tools that I learn in recent past. It was complex then before in planning, but easy to implement. However the attitude of programmer is they need something ease to plan and implementation they are not bothered. I must suggest using WPF and WCF in your project where you need them. I haven’t try but they says WPF and Silverlight has same code or reusable. Well if that is the case then surely I will start giving Silverlight solution in next quarter or so.

Now the time came to run my first .NET 4.0 Framework application, I configure a New website in IIS. Select .NET framework 4.0 from ASP.NET tab in Website property. But what I found is I am getting 404 error. Strangely enough that Default.aspx page does exists and with .NET 2.0 it works just fine. So what goes wrong ? I search and experiment with web.config, but to no avail.

Then I found this article http://www.denalimultimedia.com/info/Articles.aspx?cid=20&topic=IIS-6-ASP-NET-4-0-page-not-found-404, which clearly mention that

• Install framework asp.net 4.0 and restart [Web Platform Installer does it just fine]
• IIS 6.0 console should now display ASP.NET 4.0 under tab “ASP.NET” [It was again done if #1 above is right]
• Under Web Services Extensions (in IIS console) .NET 4.0 framework might be set as: prohibited. This must be ALLOWED otherwise a browser might just return the error 404 page not found which is not very descriptive
• ASP.NET 4.0 applications must be run in a separate process (Application Pool) otherwise you’ll get the error ‘Server Application Unavailable’.

It is anyways always good to run different programming languages in different pool. For Example, if you want to run PHP on same server I use different pool for them. Covering those 4 steps I got my server working with .NET 4.0. Wondering why Web Platform Team forgot to complete 2 step in their installer.

Well this message can be a direct/indirect attack on those who thing Microsoft is up again only making $$$ and not services. Well guys you are wrong, check this website out. You will find PHP and hence any software made on PHP works fine on Windows server and that to with easy. I am using PHP on Windows from IIS 5.5 and it always work fine for me, but with IIS 7 and MS WEB it is really getting much easier to install PHP and any application on it.

I like the concept and idea, love to see same thing from Apache when they start support for .NET framework ?

this file format is based on one idea, Create a XML of Data and formatting in file, zip it and save it. Simple and easy. This file format is not limted to MS Office, but OpenOffice.org understand it very well.

In my project I need to create an Excel file such that my user can generate a summary report in Excel fileformat on button click. All I need to do is add 10 more lines (Except data retrivel logic) in my software, include few library and I am done.

Thanks to http://simpleooxml.codeplex.com/ which make my work easy, this is wrapper highlevel class based on Microsoft OpenXML Format SDK. which include some .NET assembly. This wrapper make it easy for you write Excel of Word document in few lines. A sample for ASP.NET is included from author, though I use it for Windows Application and it works like charm.

Here is sample of such query

SELECT * FROM
    (SELECT ROW_NUMBER()
        OVER (ORDER BY EmployeeName) AS Row,
        EmployeeId, EmployeeName, Salary
    FROM Employees) AS EMP
WHERE Row BETWEEN 2 AND 4

I took this sample and knowledge from a great resources for .NET developer. Website URL is http://www.openwinforms.com/row_number_to_sql_select.html

Hope you like the solution. Any alternative is welcome.

But today I thought to experiment a bit. I simply create a Class file in my application, import ZedLibrary in that class file. Create an object of ZedGraph Control within my class, Set all values that are set in my old application’s initilizecomponent function, and create disk graph as I do previously. And it works!!! i know this sound “obvious” thing to whom that know a control cannot be used without making its instance on form. But for those who are not very mature like me, they might not know this. Also, some controls are graphic bound (due to bad coding only). But seriously ZedControl is perfect in that manner.  

I learn a new thing today in .NET framework, that really tells why it is true object oriented and what we see on screen is only CODE at the end of day, so there is nothing to worries about the display if you can control it through property and methods.  

Now let me finish my project first .

You can go to ZedGraph Wiki, or can ask question on its sourceforge forum which still is somewhat active and people are posting there.

This is really a good project and I will stick with it as I modify its source as well for one of very own custom requirement and hence I know its source architecture to us it in future as well.

http://forums.asp.net/p/1002747/1324414.aspx#1324414

It mainly suggest to use TemplateField column with imagebutton, as Imagebutton is not quite compatible with ButtonField. Rest you can read above for details on it.

http://blogs.msdn.com/jamesche/archive/2007/09/30/running-asp-net-in-a-shared-hosting-environment.aspx

 Hope it helps

 http://www.aspfree.com/c/a/VB.NET/Executing-LongRunning-Tasks-with-the-Progress-Bar-in-ASPNET/

This article suggest a method on how to show progress bar in your web application.