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Imagine you have URL something like this:

http://www.yourdomain.com?param1=value1&param2=value2&param3=value3&param4=value4

and you want to get key-value pairs such as

• {“param1″, “param2″, “param3″, “param4″}
• {“value1″, “value2″, “value3″, “value4″}

It is easy to do using system function:

using System.Collections.Specialized;
NameValueCollection query = HttpUtility.ParseQueryString(queryString);
Response.Write(query["param1"]);

Use HttpContext.Current.Request instead of Request

i.e.

HttpContext.Current.Request.UserHostAddress

not

Request.UserHostAddress

Comparison: ASP .NET WebForms vs MVC

We had some problems with subdirectories under our root website.

We wanted to add different examples under our website root (organized into folders) like this:

• www.our-website.com/example1
• www.our-website.com/example2
• …

And we always got these errors.

At root of our website www.our-website.com we didn’t have any web.config and we didn’t want any. Every subfolder has its own web.config and it didn’t worked under IIS7

Solution:

Click on each folder under IIS and then right mouse click Convert To Application and it worked.

Just use this piece of code or read at this MSDN article:

private void VaryQualityLevel()
{
	// Get a bitmap.
	Bitmap bmp1 = new Bitmap(@"c:\TestPhoto.jpg");
	ImageCodecInfo jgpEncoder = GetEncoder(ImageFormat.Jpeg);

	// Create an Encoder object based on the GUID
	// for the Quality parameter category.
	System.Drawing.Imaging.Encoder myEncoder =
	System.Drawing.Imaging.Encoder.Quality;

	// Create an EncoderParameters object.
	// An EncoderParameters object has an array of EncoderParameter
	// objects. In this case, there is only one
	// EncoderParameter object in the array.
	EncoderParameters myEncoderParameters = new EncoderParameters(1);

	EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, 50L);
	myEncoderParameters.Param[0] = myEncoderParameter;
	bmp1.Save(@"c:\TestPhotoQualityFifty.jpg", jgpEncoder, myEncoderParameters);

	myEncoderParameter = new EncoderParameter(myEncoder, 100L);
	myEncoderParameters.Param[0] = myEncoderParameter;
	bmp1.Save(@"c:\TestPhotoQualityHundred.jpg", jgpEncoder, myEncoderParameters);

	// Save the bitmap as a JPG file with zero quality level compression.
	myEncoderParameter = new EncoderParameter(myEncoder, 0L);
	myEncoderParameters.Param[0] = myEncoderParameter;
	bmp1.Save(@"c:\TestPhotoQualityZero.jpg", jgpEncoder, myEncoderParameters);

}

...

private ImageCodecInfo GetEncoder(ImageFormat format)
{
	ImageCodecInfo[] codecs = ImageCodecInfo.GetImageDecoders();

	foreach (ImageCodecInfo codec in codecs)
	{
	if (codec.FormatID == format.Guid)
	{
	return codec;
	}
	}
	return null;
}