Asp.net (C #) function for obtaining the address of the first image

First, find the location of the first

Then, separate spaces to obtain the attributes and attribute values of the image. The extracted SRC value is the image address.

CodeAs follows:

Copy code The Code is as follows: // <summary>
/// Obtain the image address in the text
/// </Summary>
/// <Param name = "content"> content </param>
/// <Returns> address string </returns>
Public static string getimageurl (string content)
{
Int mouse = 0;
Int cat = 0;
String imagelabel = "";
String imgsrc = "";
String [] attributes;

Do // get the connection of the first image as the main Image
{
Cat = content. indexof ("Mouse = content. indexof ('>', CAT );
Imagelabel = content. substring (CAT, mouse-cat); // Image Tag

Attributes = imagelabel. Split (''); // separate image attributes

Foreach (string temp_attributes in attributes) // obtain the image address attribute
If (temp_attributes.indexof ("src")> = 0)
{
Imgsrc = temp_attributes.tostring ();
Break;
}
Imgsrc = imgsrc. substring (imgsrc. indexof ('"') + 1, imgsrc. lastindexof ('"')-imgsrc. indexof ('"')-1); // extract the address from the cluster address attribute

} While (imgsrc = "" & CAT> 0 );

Return (imgsrc );
}