`string.Format()` considers each &#39;{&#39; or &#39;}&#39; to be part of a placeholder (like &#39;{0}&#39; you already use). You need to escape each literal occurrence by doubling it.

So in your case do:

     string tmp = @&quot;
        if (UseImageFiles) {{
            ...
        }}&quot;;



How can I display and count the values whose dates are yesterday?
I used `time()` to insert date in the database. Example:

    URL: google.com youtube.com google.com youtube.com test.com youtube.com
    DateVisited: 1313668492 1313668540 1313668571 13154314
    
I want do display how many URLs that have multiple existed in the table and also how many of that URL have been visited yesterday. Example result:

    LINK       | timesExisted | timesVisitedYesterday
    Google.com |       2      | 2
    youtube.com|       3      | 3

I already have the idea on getting yesterday&#39;s date, but I don&#39;t have an idea on counting how many times a URL has existed for yesterday and counting how many times a URL has existed in the table.

MySQL selecting yesterday&#39;s date

One (or a couple) of our tests are taking forever and we&#39;d like to optimize them.

We have say 1000 tests so it&#39;s impractical for me to go through run each file.

Is there an easy to way to find the slow ones?

This is rspec 1.3

How to find which rspec test is taking so long

What do I do wrong here?

    string tmp = @&quot;
        if (UseImageFiles) {
            vCalHeader += &quot;&quot;&lt;td&gt;&lt;img onmousedown=&#39;&#39; src= &#39;{0}cal_fastreverse.gif&#39; width=&#39;13px&#39; height=&#39;9&#39; onmouseover=&#39;changeBorder(this, 0)&#39; onmouseout=&#39;changeBorder(this, 1)&#39; style=&#39;border:1px solid white&#39;&gt;&lt;/td&gt;\n&quot;&quot;; //Year scroller (decrease 1 year)
            calHeight += 22;
        }&quot;;

    string x = &quot;xter&quot;;
    tmp = string.Format(tmp, x);

I get

&gt; Input string was not in correct format

when trying to change `{0}`. I am doing this in C# and WinForms.

&gt; Format Exception was unhandled    
&gt;   Input string was not in correct format   

Troubleshoot tips I get:

&gt;    Make sure your method arguments are in right format. When converting a string to datetime, parse the string to take out  the date before putting each variable into the DateTime object.

string.Format() giving &quot;Input string is not in correct format&quot;

What do I do wrong here?
<pre><code class="hljs language-ini">string tmp = @"
 if (UseImageFiles) {
 vCalHeader += ""&#x3C;td>&#x3C;img onmousedown='' src= '{0}cal_fastreverse.gif' width='13px' height='9' onmouseover='changeBorder(this, 0)' onmouseout='changeBorder(this, 1)' style='border:1px solid white'>&#x3C;/td>\n""; //Year scroller (decrease 1 year)
 calHeight += 22;
 }";

string x = "xter";
tmp = string.Format(tmp, x);
</code></pre>
I get
> Input string was not in correct format
when trying to change <code>{0}</code>. I am doing this in C# and WinForms.
> Format Exception was unhandled 
> Input string was not in correct format
Troubleshoot tips I get:
> Make sure your method arguments are in right format. When converting a string to datetime, parse the string to take out the date before putting each variable into the DateTime object.

I am developing a  Windows Form Application with several pages.  I am using a TabControl to implement this. Instead of using the header to switch between tabs, I want my application to control this e.g.  the next tab should open after the user has filled in a text box and clicked the next button.


Hide Tab Header on C# TabControl

I&#39;m using ASP.NET MVC 3 and Entity Framework 4.1 Code First.

Let&#39;s say I have a `User` entity :

    public class User
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string Email { get; set; }
        public string Password { get; set; }        
    }

When editing it in my `UserController` I want to add a `PasswordConfirmation` field and verify that `PasswordConfirmation == Password` 

1. By composition
-----------------
My first try was :

    public class EditUserModel
    {
        [Required]
        public User User { get; set; }

        [Compare(&quot;User.Password&quot;, ErrorMessage = &quot;Passwords don&#39;t match.&quot;)]
        public string PasswordConfirmation { get; set; }
    }

In this case the client side validation &lt;del&gt;works but&lt;/del&gt; (**Edit:** client side validation working was a coincidence.) **doesn&#39;t work** and the **server side validation fails** with the following message : *Could not find a property named User.Password*

**Edit:** I think the best solution, in this case, would be to create a custom  `CompareAttribute`

**Implementing `IValidatableObject`**

    public class EditUserModel : IValidatableObject
    {
        [Required]
        public User User { get; set; }
        public string PasswordConfirmation { get; set; }

        public IEnumerable&lt;ValidationResult&gt; Validate(ValidationContext validationContext)
        {
            if(this.PasswordConfirmation != this.User.Password)
                return new[] { new ValidationResult(&quot;Passwords don&#39;t match&quot;, new[] { &quot;PasswordConfirmation &quot; }) };

            return new ValidationResult[0];
        }
    }

In this case the **server side validation works** but the **client side validation doesn&#39;t work** anymore. Implementing `IClientValidatable` seems a bit too complicated and I prefer not having client side validation in this case.

2. By inheritance
-----------------

    public class EditUserModel : User
    {
        [Compare(&quot;Password&quot;, ErrorMessage = &quot;Passwords don&#39;t match.&quot;)]
        public string PasswordConfirmation  { get; set; }
    }

When trying to directly save `EditUserModel` using EF it doesn&#39;t work, I get some some error message about the `EditUserModel` metadata so I&#39;m using *AutoMapper* to convert from `User` to `EditUserModel` and backwards.
This solution **works** but it more complex because I have to convert from the model to the view model and backwards.

3. By duplication
-----------------
*(Suggested by Malte Clasen)*

The view model would have all the properties of the model plus additional ones. *AutoMapper* can be used to convert from one to another.

    public class EditUserModel {    
      public string Name { get; set; }    
      public string Email { get; set; }    
      public string Password { get; set; }   
      [Compare(&quot;Password&quot;, ErrorMessage = &quot;Passwords don&#39;t match.&quot;)]     
      public string ConfirmPassword { get; set; }        
    }

This is the solution I like the least because of code duplication (DRY) 


**Questions**

What are the pros and cons of inheritance, composition and duplication in this case ?

Is there a simple way to have both client side and server side validation without having to convert the model to the view model and backwards ?

ASP.NET MVC Architecture : ViewModel by composition, inheritance or duplication?

What do the question mark (`?`) and colon (`:`) mean?

    ((OperationURL[1] == &quot;GET&quot;) ? GetRequestSignature() : &quot;&quot;)

It appears in the following statement:

    string requestUri = _apiURL + &quot;?e=&quot; + OperationURL[0] + ((OperationURL[1] == &quot;GET&quot;) ? GetRequestSignature() : &quot;&quot;);

Question mark and colon in statement. What does it mean?

Is it possible to include a link to a website in the XML documentation? For example, my method&#39;s summarized as

    ///&lt;Summary&gt;
    /// This is a math function I found HERE.
    ///&lt;/Summary&gt;
    public void SomeMathThing(Double[] doubleArray)
    {
       ...
    }

and when I type

&lt;!-- language: lang-none --&gt;

    SomeMathThing(

I want IntelliSense to show the summary with the option to click on &quot;HERE&quot; to link to an outside website. Is this possible? How would it be done?

C# XML Documentation Website Link

The class `CancellationTokenSource` is disposable. A quick look in Reflector proves usage of `KernelEvent`, a (very likely) unmanaged resource.
Since `CancellationTokenSource` has no finalizer, if we do not dispose it, the GC won&#39;t do it.

On the other hand, if you look at the samples listed on the MSDN article [Cancellation in Managed Threads](http://msdn.microsoft.com/en-us/library/dd997364.aspx), only one code snippet disposes of the token.

What is the proper way to dispose of it in code?

 1. You cannot wrap code starting your parallel task with `using` if you do not wait for it. And it makes sense to have cancellation only if you do not wait.
 2. Of course you can add `ContinueWith` on task with a `Dispose` call, but is that the way to go?
 3. What about cancelable PLINQ queries, which do not synchronize back, but just do something at the end? Let&#39;s say `.ForAll(x =&gt; Console.Write(x))`?
 4. Is it reusable? Can the same token be used for several calls and then dispose it together with the host component, let&#39;s say UI control? 

Because it does not have something like a `Reset` method to clean-up `IsCancelRequested` and `Token` field I would suppose it&#39;s not reusable, thus every time you start a task (or a PLINQ query) you should create a new one. Is it true? If yes, my question is what is the correct and recommended strategy to deal with `Dispose` on those many `CancellationTokenSource` instances?

When to dispose CancellationTokenSource?

How can I insert the assembly version number (which I set to auto increment) into a Winform form text?

Version number in Winform form text

I currently have an application with a GUI.

Would it be possible to use this same application from the commandline (without GUI and with using parameters).

Or do I have to create a separate .exe (and application) for the commandline tool?

C# application both GUI and commandline

I have a modal dialog, and need to hide the Close (X) button, but I cannot use 
`ControlBox = false`, because I need to keep the Minimize and Maximize buttons.

I need to hide just Close button, is there any way to do that?

Thanks a lot!

Update: I had permission to disable it, which is simpler :) Thanks all!

How to hide only the Close (x) button?

I have a button and I want image (.ico file) and text to exist on it. My problem is that I want button&#39;s height to be small, but I can&#39;t manage to &quot;shrink&quot; the image as much as I want to. The result is to have a piece of image visible on the button and not the hole image. At the image property the image size is fixed (48x48) and the option is grey so I can&#39;t change it. How can I make this image to be 16x16?


How can I make the image size smaller on a button?

I&#39;m trying to replace a character at a specific index in a string. 

What I&#39;m doing is:

    String myName = &quot;domanokz&quot;;
    myName.charAt(4) = &#39;x&#39;;

This gives an error.  Is there any method to do this?

Replace a character at a specific index in a string?

I&#39;m doing dynamic SQL to convert all columns in a table a string

so After after all I do

    EXEC(@template); 

where @template is the dynamic generated query so: 

    col1  col2 col3
    ---------------
    1    7    13 
    2    8    14
    3    9    15
    4   10    16
    5   11    17
    6   12    18

(this results: 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18)

How do I assign to a variable the resulting string

something like?
 

    DECLARE  @result AS varchar(max);
     SET @result = EXEC(@template); 

Assign result of dynamic sql to variable

Is use of `string.IsNullOrEmpty(string)` when checking a string considered as bad practice when there is `string.IsNullOrWhiteSpace(string)` in .NET 4.0 and above?

string.IsNullOrEmpty(string) vs. string.IsNullOrWhiteSpace(string)

The Java documentation doesn&#39;t seem to mention anything about deprecation for `StringTokenizer`, yet I keep hearing about how it was deprecated long ago.  Was it deprecated because it had bugs/errors, or is `String.split()` simply better to use overall?

I have some code that uses `StringTokenizer` and I am wondering if I should seriously be concerned about refactoring it to use `String.split()`, or whether the deprecation is purely a matter of convenience and my code is safe.

Why is StringTokenizer deprecated?

How to remove leading zeros in strings using C#?

For example in the following numbers, I would like to remove all the leading zeros.

    0001234
    0000001234
    00001234

Content Type	Original Author	Original Content on Stackoverflow
Question	Mr.Rendezvous	View Question on Stackoverflow
Solution 1 - C#	Christian.K	View Answer on Stackoverflow

string.Format() giving "Input string is not in correct format"

C# Problem Overview

C# Solutions

Solution 1 - C#

How to find which rspec test is taking so long

MySQL selecting yesterday's date

Attributions