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What exactly does an #if 0 … #endif block do?
...
When the preprocessor sees #if it checks whether the next token has a non-zero value. If it does, it keeps the code around for the compiler. If it doesn't, it gets rid of that code so the compiler never sees it.
If someone says #if 0 they are effectively commenting out the code s...
How to add item to the beginning of List?
.... The databinding operation will add to the statically declared item.
<asp:DropDownList ID="ddl" runat="server" AppendDataBoundItems="true">
<asp:ListItem Value="0" Text="Please choose..."></asp:ListItem>
</asp:DropDownList>
http://msdn.microsoft.com/en-us/library/syst...
Difference Between ViewResult() and ActionResult()
What is the difference between ViewResult() and ActionResult() in ASP.NET MVC?
8 Answers
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What is a .snk for?
...lobal Assembly Cache (GAC).
The .snk file contains the public and private tokens for your key. When you want to sign some data (or binary) with that key, a checksum is calculated on the data, which is then encrypted with the private token. The encrypted checksum is then added to the data. Anyone ca...
How to split a file into equal parts, without breaking individual lines? [duplicate]
...r
enter code here
line="to=xxx@gmail.com=yyy@yahoo.co.in";
string[] tokens = line.Split(new char[] { '=' }, 2, 0);
ans:
tokens[0]=to
token[1]=xxx@gmail.com=yyy@yahoo.co.in"
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ASP.NET MVC ambiguous action methods
...Delete")]
public ActionResult DeleteConfirmed(int id = 0)
See http://www.asp.net/mvc/tutorials/getting-started-with-mvc3-part9-cs
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How do you do Impersonation in .NET?
...nerally use WindowsIdentity.RunImpersonated, which accepts a handle to the token of the user account, and then either an Action or Func<T> for the code to execute.
WindowsIdentity.RunImpersonated(tokenHandle, () =>
{
// do whatever you want as this user.
});
or
var result = WindowsI...
#ifdef vs #if - which is better/safer as a method for enabling/disabling compilation of particular s
...rather than 0/1 in your #define, and because the value is a single lexical token, it's the one time you don't need parentheses around it.
#define DEBUG_ENABLED true
instead of
#define DEBUG_ENABLED (1)
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What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?
...happen in a particular order, and some have specific use cases.
Braces as Token Delimiters
The ${var} syntax is primarily used for delimiting ambiguous tokens. For example, consider the following:
$ var1=foo; var2=bar; var12=12
$ echo $var12
12
$ echo ${var1}2
foo2
Braces in Array Expansions
T...
How to make sure that string is valid JSON using JSON.NET
...method).
(Using JSON.Net)
Simplest way would be to Parse the string using JToken.Parse, and also to check if the string starts with { or [ and ends with } or ] respectively (added from this answer):
private static bool IsValidJson(string strInput)
{
if (string.IsNullOrWhiteSpace(strInput)) { ret...