Just set the `AutoScroll` property of your `Panel` to true and it will handle adding the scrollbars for you.

    this.panel1.AutoScroll = true;

I&#39;m using Django 1.0.2.  I&#39;ve written a ModelForm backed by a Model.  This model has a ForeignKey where blank=False.  When Django generates HTML for this form it creates a select box with one option for each row in the table referenced by the ForeignKey.  It also creates an option at the top of the list that has no value and displays as a series of dashes:

    &lt;option value=&quot;&quot;&gt;---------&lt;/option&gt;

What I&#39;d like to know is:

1.  What is the cleanest way to remove this auto-generated option from the select box?  
2.  What is the cleanest way to customize it so that it shows as:

        &lt;option value=&quot;&quot;&gt;Select Item&lt;/option&gt;

In searching for a solution I came across [Django ticket 4653](http://code.djangoproject.com/ticket/4653) which gave me the impression that others had the same question and that the default behavior of Django may have been modified.  This ticket is over a year old so I was hoping there might be a cleaner way to accomplish these things.

Thanks for any help,

Jeff

Edit: I&#39;ve configured the ForeignKey field as such: 

    verb = models.ForeignKey(Verb, blank=False, default=get_default_verb)

This does set the default so that it&#39;s no longer the empty/dashes option but unfortunately it doesn&#39;t seem to resolve either of my questions.  That is, the empty/dashes option still appears in the list.

Customize/remove Django select box blank option

What is the difference between **GET** and **POST** for **Ajax** requests?

I don&#39;t see any difference between those two, except that when I use **GET**, the parameters are send in URL, which for me don&#39;t really make any difference, since all requests are made on background and user doesn&#39;t find any difference.

edit:
What are **PUT** and **DELETE** methods used for?

GET vs POST in Ajax

How do you add a scrollbar to a Panel control with many controls in windows form application?

<p>How do you add a scrollbar to a Panel control with many controls in windows form application?</p>


I&#39;ve been reading lots on how to trigger an application from inside a C# program (Process.Start()), but I haven t been able to find any information on how to have this new application run within a panel of my C# program.  For example, I&#39;d like a button click to open a notepad.exe WITHIN my application, not externally.

How can I run another application within a panel of my C# program?

I&#39;m stuck trying to turn on a single pixel on a Windows Form.

    graphics.DrawLine(Pens.Black, 50, 50, 51, 50); // draws two pixels
    
    graphics.DrawLine(Pens.Black, 50, 50, 50, 50); // draws no pixels

The API really should have a method to set the color of one pixel, but I don&#39;t see one.

I am using C#.


Draw a single pixel on Windows Forms

I&#39;d like to do two things on my progress bar.

 1. Change the green colour to red.
 1. Remove the blocks and make it in one color.

Any information about those two things I wonder how to accomplish will be greatfuly appreaciated!

Thanks.

How to change the color of progressbar in C# .NET 3.5?

Is there any relatively easy way to insert a modern browser into a .NET application? 

As far as I understand, the `WebBrowser` control is a wrapper for **IE**, which wouldn&#39;t be a problem except that it looks like it is a very old version of **IE**, with all that entails in terms of CSS screw-ups, potential security risks (if the rendering engine wasn&#39;t patched, can I really expect the zillion buffer overflow problems to be fixed?), and other issues. 

I am using *Visual Studio C#* (express edition - does it make any difference here?)

I would like to integrate a good web browser in my applications. In some, I just use it to handle the user registration process, interface with some of my website&#39;s features and other things of that order, but I have another application in mind that will require more err... control. 

I need:

 - A browser that can integrate inside a window of my application (not a separate window)
 - A good support for CSS, js and other web technologies, on par with any modern browser
 - Basic browser functions like &quot;navigate&quot;, &quot;back&quot;, &quot;reload&quot;...
 - Liberal access to the page code and output. 

I was thinking about Chrome, since it comes under the BSD license, but I would be just as happy with a recent version of IE. 

As much as possible, I would like to keep things simple. The best would be if one could patch the existing `WebBrowser` control, which does already about 70% of what I need, but I don&#39;t think that&#39;s possible.

I have found an activeX control for Mozilla (http://www.iol.ie/~locka/mozilla/control.htm) but it looks like it&#39;s an old version, so it&#39;s not necessarily an improvement.

I am open to suggestions

Replacing .NET WebBrowser control with a better browser, like Chrome?

In WinForms, to set focus to a specific control, I always seem to wind up calling `Control.Select()` **and** `Control.Focus()` to get it to work.

What is the difference, and is this the correct approach?

What&#39;s the difference between Control.Select() and Control.Focus()?

I have a set of controls with attached commands and logic that are constantly reused in the same way.  I decided to create a user control that holds all the common controls and logic. 

However I also need the control to be able to hold content that can be named.  I tried the following:

&lt;!-- language: xaml --&gt;

    &lt;UserControl.ContentTemplate&gt;
        &lt;DataTemplate&gt;
            &lt;Button&gt;a reused button&lt;/Button&gt;
            &lt;ContentPresenter Content=&quot;{TemplateBinding Content}&quot;/&gt;
            &lt;Button&gt;a reused button&lt;/Button&gt;
        &lt;/DataTemplate&gt;
    &lt;/UserControl.ContentTemplate&gt;

However it seems any content placed inside the user control cannot be named.  For example if I use the control in the following way:

&lt;!-- language: xaml --&gt;

    &lt;lib:UserControl1&gt;
         &lt;Button Name=&quot;buttonName&quot;&gt;content&lt;/Button&gt;
    &lt;/lib:UserControl1&gt;

I receive the following error:

&gt; Cannot set Name attribute value &#39;buttonName&#39;
&gt; on element &#39;Button&#39;. &#39;Button&#39; is
&gt; under the scope of element
&gt; &#39;UserControl1&#39;, which already had a
&gt; name registered when it was defined in
&gt; another scope.

If I remove the buttonName, then it compiles, however I need to be able to name the content. How can I achieve this?

How to create a WPF UserControl with NAMED content

Getting into the first serious WPF project.  It seems like there are a lot of basic controls flat out missing.  Specifically, I am looking for the Numeric UpDown control.  Was there an out of band release that I missed?  Really don&#39;t feel like writing my own control.  

I do not want to use the WindowsFormHost and plop a WinForm ctl on it.  I want it to be fully WPF without any legacy junk.

Thanks

Where is the WPF Numeric UpDown control?

I&#39;m working on a python script that starts several processes and database connections. Every now and then I want to kill the script with a &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;C&lt;/kbd&gt; signal, and I&#39;d like to do some cleanup.

In Perl I&#39;d do this:

&lt;!-- language: perl --&gt;

    $SIG{&#39;INT&#39;} = &#39;exit_gracefully&#39;;
    
    sub exit_gracefully {
        print &quot;Caught ^C \n&quot;;
        exit (0);
    }

How do I do the analogue of this in Python?

How do I capture SIGINT in Python?

How can one get word wrap functionality for a `Label` for text which goes out of bounds?


Word wrap for a label in Windows Forms

These are three different things you can add to a project and I am not quite sure if I understand the difference. They all seem to for example show up in the component toolbox when working with a `Form`. What are some common usage scenarios for each of them? What is the difference?

What is the difference between User Control, Custom Control and Component?

How do I determine, without using jQuery or any other JavaScript library, if a div with a vertical scrollbar is scrolled all the way to the bottom?

My question is not how to scroll to the bottom. I know how to do that. I want to determine if the the div is scrolled to the bottom already.

This does not work:

    if (objDiv.scrollTop == objDiv.scrollHeight) 



How can I determine if a div is scrolled to the bottom?

How can I determine the height of a horizontal scrollbar, or the width of a vertical one, in JavaScript?

How can I get the browser&#39;s scrollbar sizes?

I have a `TextBlock` in WPF. I write many lines to it, far exceeding its vertical height. I expected a vertical scroll bar to appear automatically when that happens, but it didn&#39;t. I tried to look for a scroll bar property in the Properties pane, but could not find one.

How can I make vertical scroll bar created automatically for my `TextBlock` once its contents exceed its height?

Clarification: I would rather do it from the designer and not by directly writing to the XAML.

Automatic vertical scroll bar in WPF TextBlock?

I want to hide any scrollbars from my `div` elements and my whole `body`, but still let the user scroll with the mouse wheel or arrow keys. How can this be achieved with raw JavaScript or jQuery? Any ideas?

How can I disable a browser or element scrollbar, but still allow scrolling with wheel or arrow keys?

I have an `iframe` on www.example.com that points to support.example.com (which is a CNAME to a foreign domain).

I automatically resize the height of my iframe so that the frame will not need any scrollbars to display the contained webpage.

On Firefox and IE this works great, there is no scrollbar since I use `&lt;iframe ... scrolling=&quot;no&quot;&gt;&lt;/iframe&gt;`. However, on webkit browsers (Safari and Chrome), the vertical scrollbar persists even when there is sufficient room for the page without the scrollbar (the scrollbar is grayed out).

How do I hide the scrollbar for webkit browsers?

Safari/Chrome (Webkit) - Cannot hide iframe vertical scrollbar

How can I change the Java Runtime Version on Windows.

I installed Java&amp;nbsp;7 for some tests, and now I need the old java6 as system default, but I don&#39;t want to uninstall the Java&amp;nbsp;7 (I need it for later tests). Can I change the system-used [JRE][1] in the control panel/Java/JRE tab? I can change/edit/add/delete the user-used version, but not the system-used.

  [1]: https://en.wikipedia.org/wiki/Java_virtual_machine


How can I change the Java Runtime Version on Windows (7)?

I was wondering how to change or modify the transparency of a Panel in C#, not the whole form, but the panel only.. I&#39;ve seen many C# tutorials on Opacity, but its for the Form. im looking for how it could be possible with the Panel only. Thank You!

How can I set the opacity or transparency of a Panel in WinForms?

There are many times when more than one panel would suitable for the layout I want, however I know there is a difference in render times for different panel types. 

For example, [MSDN][1] states that 

&gt; A relatively simple `Panel`, such as `Canvas`, can have significantly
&gt; better performance than a more complex `Panel`, such as `Grid`.

So in terms of render time and performance, in what order are WPF panels the most efficient?

WPF Panels:

* `Canvas`
* `DockPanel`
* `Grid`
* `UniformGrid`
* `StackPanel`
* `WrapPanel`
* `VirtualizingPanel` / `VirtualizingStackPanel`

I&#39;m fairly sure I saw a list of this somewhere online, but I can&#39;t find it now.

The ideal answer I am looking for would provide me a list of panels in the order that they would render fastest. I understand the number of children is a big factor in how efficient the panels are, so for the sake of this question, assume each panel only has a `Label`/`TextBox` pair. 

In addition, I would like a list of exceptions, such as specific panels which perform better than others based on certain conditions.

**Update**

To summarize based on the [accepted answer][2] below, the panel performance is based on the number and layout of child items, however in general the list from fastest to slowest is: 

* `Canvas`
* `StackPanel`
* `WrapPanel`
* `DockPanel`
* `Grid`

In addition, a `VirtualizingPanel` / `VirtualizingStackPanel` should always be used if there are a lot of items that don&#39;t always fit on the screen.

I&#39;d highly recommend you read the [accepted answer][3] below for more details before just picking an item from this list.


  [1]: http://msdn.microsoft.com/en-us/library/ms745058.aspx#LayoutSystem_Overview
  [2]: https://stackoverflow.com/a/9996707/302677
  [3]: https://stackoverflow.com/a/9996707/302677

In what order are Panels the most efficient in terms of render time and performance?

When I trying to access the admin page it gives me the following error:

    System check identified no issues (0 silenced).
    June 21, 2016 - 15:26:14
    Django version 1.9.7, using settings &#39;librato_chart_sender_web.settings&#39;
    Starting development server at http://127.0.0.1:8000/
    Quit the server with CONTROL-C.
    Internal Server Error: /admin/
    Traceback (most recent call last):
      File &quot;/Library/Python/2.7/site-packages/django/core/handlers/base.py&quot;, line 149, in get_response
        response = self.process_exception_by_middleware(e, request)
      File &quot;/Library/Python/2.7/site-packages/django/core/handlers/base.py&quot;, line 147, in get_response
        response = wrapped_callback(request, *callback_args, **callback_kwargs)
      File &quot;/Library/Python/2.7/site-packages/django/contrib/admin/sites.py&quot;, line 265, in wrapper
        return self.admin_view(view, cacheable)(*args, **kwargs)
      File &quot;/Library/Python/2.7/site-packages/django/utils/decorators.py&quot;, line 149, in _wrapped_view
        response = view_func(request, *args, **kwargs)
      File &quot;/Library/Python/2.7/site-packages/django/views/decorators/cache.py&quot;, line 57, in _wrapped_view_func
        response = view_func(request, *args, **kwargs)
      File &quot;/Library/Python/2.7/site-packages/django/contrib/admin/sites.py&quot;, line 233, in inner
        if not self.has_permission(request):
      File &quot;/Library/Python/2.7/site-packages/django/contrib/admin/sites.py&quot;, line 173, in has_permission
        return request.user.is_active and request.user.is_staff
    AttributeError: &#39;WSGIRequest&#39; object has no attribute &#39;user&#39;
    [21/Jun/2016 15:26:18] &quot;GET /admin/ HTTP/1.1&quot; 500 78473

Im quite new in django ... but I followed this tutorial: https://docs.djangoproject.com/en/1.9/ref/contrib/admin/

I dont have any custom AdminSites and custom AdminModels.

I already googled about this problem but still I cannot solve it for my case in any way. Can you help ?

here is my `settings.py`:

    &quot;&quot;&quot;
    Django settings for librato_chart_sender_web project.
    
    Generated by &#39;django-admin startproject&#39; using Django 1.11.dev20160523235928.
    
    For more information on this file, see
    https://docs.djangoproject.com/en/dev/topics/settings/
    
    For the full list of settings and their values, see
    https://docs.djangoproject.com/en/dev/ref/settings/
    &quot;&quot;&quot;
    
    import os
    
    # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
    BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
    
    
    # Quick-start development settings - unsuitable for production
    # See https://docs.djangoproject.com/en/dev/howto/deployment/checklist/
    
    # SECURITY WARNING: keep the secret key used in production secret!
    SECRET_KEY = &#39;*1@+=wzrqx^6$9z&amp;@2@d8r(w$js+ktw45lv2skez(=kz+rwff_&#39;
    
    # SECURITY WARNING: don&#39;t run with debug turned on in production!
    DEBUG = True
    
    ALLOWED_HOSTS = []
    
    
    # Application definition
    
    INSTALLED_APPS = [
        &#39;django.contrib.admin&#39;,
        &#39;librato_chart_sender&#39;,
        &#39;fontawesome&#39;,
        &#39;django.contrib.auth&#39;,
        &#39;django.contrib.contenttypes&#39;,
        &#39;django.contrib.sessions&#39;,
        &#39;django.contrib.messages&#39;,
        &#39;django.contrib.staticfiles&#39;,
    ]
    
    MIDDLEWARE = [
        &#39;django.middleware.security.SecurityMiddleware&#39;,
        &#39;django.contrib.sessions.middleware.SessionMiddleware&#39;,
        &#39;django.middleware.common.CommonMiddleware&#39;,
        &#39;django.middleware.csrf.CsrfViewMiddleware&#39;,
        &#39;django.contrib.auth.middleware.AuthenticationMiddleware&#39;,
        &#39;django.contrib.messages.middleware.MessageMiddleware&#39;,
        &#39;django.middleware.clickjacking.XFrameOptionsMiddleware&#39;,
    ]
    
    ROOT_URLCONF = &#39;librato_chart_sender_web.urls&#39;
    
    TEMPLATES = [
        {
            &#39;BACKEND&#39;: &#39;django.template.backends.django.DjangoTemplates&#39;,
            &#39;DIRS&#39;: [os.path.join(BASE_DIR, &#39;librato_chart_sender/templates&#39;)],
            &#39;APP_DIRS&#39;: True,
            &#39;OPTIONS&#39;: {
                &#39;context_processors&#39;: [
                    &#39;django.template.context_processors.debug&#39;,
                    &#39;django.template.context_processors.request&#39;,
                    &#39;django.contrib.auth.context_processors.auth&#39;,
                    &#39;django.contrib.messages.context_processors.messages&#39;,
                ],
            },
        },
    ]
    
    WSGI_APPLICATION = &#39;librato_chart_sender_web.wsgi.application&#39;
    
    
    # Database
    # https://docs.djangoproject.com/en/dev/ref/settings/#databases
    
    DATABASES = {
        &#39;default&#39;: {
            &#39;ENGINE&#39;: &#39;django.db.backends.sqlite3&#39;,
            &#39;NAME&#39;: os.path.join(BASE_DIR, &#39;db.sqlite3&#39;),
        }
    }
    
    
    # Password validation
    # https://docs.djangoproject.com/en/dev/ref/settings/#auth-password-validators
    
    AUTH_PASSWORD_VALIDATORS = [
        {
            &#39;NAME&#39;: &#39;django.contrib.auth.password_validation.UserAttributeSimilarityValidator&#39;,
        },
        {
            &#39;NAME&#39;: &#39;django.contrib.auth.password_validation.MinimumLengthValidator&#39;,
        },
        {
            &#39;NAME&#39;: &#39;django.contrib.auth.password_validation.CommonPasswordValidator&#39;,
        },
        {
            &#39;NAME&#39;: &#39;django.contrib.auth.password_validation.NumericPasswordValidator&#39;,
        },
    ]
    
    
    # Internationalization
    # https://docs.djangoproject.com/en/dev/topics/i18n/
    
    LANGUAGE_CODE = &#39;en-us&#39;
    
    TIME_ZONE = &#39;GMT&#39;
    
    USE_I18N = True
    
    USE_L10N = True
    
    USE_TZ = True
    
    
    # Static files (CSS, JavaScript, Images)
    # https://docs.djangoproject.com/en/dev/howto/static-files/
    
    STATIC_URL = &#39;/static/&#39;
    STATICFILES_DIRS = [
        (&#39;css&#39;, &#39;librato_chart_sender/static/css&#39;),
        (&#39;js&#39;, &#39;librato_chart_sender/static/js&#39;),
        (&#39;fonts&#39;, &#39;librato_chart_sender/static/fonts&#39;),
    ]


and `admin.py`:

    from django.contrib import admin
    from .models import Configuration
    
    # Register your models here.
    
    admin.site.register(Configuration)

Content Type	Original Author	Original Content on Stackoverflow
Question	Chetan	View Question on Stackoverflow
Solution 1 - Winforms	Samuel	View Answer on Stackoverflow

How do you add a scrollbar to a Panel control with many controls in windows form application?

Winforms Problem Overview

Winforms Solutions

Solution 1 - Winforms

GET vs POST in Ajax

Customize/remove Django select box blank option

Attributions