A first chance exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll in C#.net application..What is a first chance exception?

"First chance exception messages most often do not mean there is a problem in the code." 
When an application is being debugged, the debugger gets notified whenever an exception is encountered  At this point, the application is suspended and the debugger decides how to handle the exception. The first pass through this mechanism is called a “first chance” exception. Depending on the debugger’s configuration, it will either resume the application and pass the exception on or it will leave the application suspended and enter debug mode. If the application handles the exception, it continues to run normally.

In Visual Studio, you may see a message in the output window that looks like this:

A first chance exception of type ‘System.ApplicationException’ occurred in myapp.exe

In Visual Studio 2005 Beta2, you will see this message anytime a first chance exception is encountered in your application’s code.  If you are using Visual Studio .NET 2003, this message is shown if you have configured the debugger to stop when the specific exception type is thrown.

If the application does not handle the exception, the debugger is re-notified. This is known as a “second chance” exception. The debugger again suspends the application and determines how to handle this exception. Typically, debuggers are configured to stop on second chance (unhandled) exceptions and debug mode is entered, allowing you to debug. 

Does a first chance exception mean there is a problem in my code?First chance exception messages most often do not mean there is a problem in the code. For applications / components which handle exceptions gracefully, first chance exception messages let the developer know that an exceptional situation was encountered and was handled.

For code without exception handling, the debugger will receive a second chance exception notification and will stop with a unhandled exception. 
ref: https://msdn.microsoft.com/en-us/library/dd997368(v=vs.110).aspx

What is the difference between bool and Boolean types in C#?

bool is an alias for System.Boolean just as int is an alias for System.Int32.
C# Type.NET Framework Type

bool System.Boolean

byte System.Byte

sbyte  System.SByte

char System.Char

decimal System.Decimal

double System.Double

float System.Single

int System.Int32

uint System.UInt32

long System.Int64

ulong System.UInt64

object System.Object

short System.Int16

ushort System.UInt16

string System.String

Folder Permissions on Windows Azure Web Sites

What you can do is change permissions on a local instance of the application and then deploy it with Web Deploy. When you do that, Web Deploy will use the SetAcl operation to change permissions.

SetACL – Automate Permissions and Manage ACLs...
----------------------------------------------------------------------------------------------------------------------

Folder permissions cannot be set/customized. This means whatever location your app writes to should be under your site root.

Difference between single quotes and double quotes in Javascript

You'll want to use single quotes where you want double quotes to appear inside the string (e.g. for html attributes) without having to escape them, or vice versa. Other than that, there is no difference.

I wouldn't say there is a preferred method. You can use either. However, if you are using one form of quote in the string, you might want to use the other as the literal.

alert('Say "Hello"');

alert("Say 'Hello'");

Bootstrap's JavaScript requires jQuery version 1.9.1 or higher

Change the order of files it should be like below..

<script src="js/jquery-1.11.0.min.js"></script>

<script src="js/bootstrap.min.js"></script>

<script src="js/wow.min.js"></script>

How to get my project path?

private void btn_upload_Click(object sender, EventArgs e)

        {

            OpenFileDialog op1 = new OpenFileDialog();

            op1.Multiselect = true;

            op1.ShowDialog();

            op1.Filter = "allfiles|*.xls";

            textBox1.Text = op1.FileName;

            int count = 0;

            string[] FName;

            foreach (string s in op1.FileNames)

            {

                //string startupPath1 = System.IO.Directory.GetCurrentDirectory();

                //string startupPath = Environment.CurrentDirectory;

                string wanted_path = Path.GetDirectoryName(Path.GetDirectoryName(System.IO.Directory.GetCurrentDirectory()));

                FName = s.Split('\\');

                File.Copy(s, wanted_path + "\\Upload\\ " + FName[FName.Length - 1]);

                count++;

            }

            MessageBox.Show(Convert.ToString(count) + " File(s) copied");

        }

How can I check ModelState.IsValid from inside my Razor view

@if (!ViewData.ModelState.IsValid)
{
    <div>There are some errors</div>

<script>fun()<script>
}

function fun()

{

}

InnerException = {"The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value.\r\nThe statement has been terminated."}

This is the case if you have a date time set to 0001-01-01 because it’s out of range for Sql Server (even with Sql Server 2008 R2). In fact, Sql Server date can have date only after the year 1753.

The solution to this problem is to set a property date or to make nullable this field in the database and into your entity. This ways, you could set to null if the date is not set. Otherwise, you can use instead of of 0001-01-01 an other date has a “not set date” which is over 1753-01-01.

What's the difference between event.stopPropagation and event.preventDefault?

stopPropagation stops the event from bubbling up the event chain.

preventDefault prevents the default action the browser makes on that event.

Let's say you have

<div id="foo">
 <button id="but" />
</div>

$("#foo").click(function() {
   // mouse click on div
});

$("#but").click(function(ev) {
   // mouse click on button
   ev.stopPropagation();
});

jQuery limit to 2 decimal places

var amount = $("#textid").slider("value") * 1.60;
$("#textboxid2").val('$' + amount.toFixed(2));