If I have a HTML file on disk, How can I read it all at once in to a String variable at run time? Then I need to do some processing on that string variable.
Some html file like this:
<html>
<table cellspacing="0" cellpadding="0" rules="all" border="1" style="border-width:1px;border-style:solid;width:274px;border-collapse:collapse;">
<COLGROUP><col width=35px><col width=60px><col width=60px><col width=60px><col width=59px></COLGROUP>
<tr style="height:20px;">
<th style="background-color:#A9C4E9;"></th><th align="center" valign="middle" style="color:buttontext;background-color:#D3DCE9;">A</th><th align="center" valign="middle" style="color:buttontext;background-color:#D3DCE9;">B</th><th align="center" valign="middle" style="color:buttontext;background-color:#D3DCE9;">C</th><th align="center" valign="middle" style="color:buttontext;background-color:#D3DCE9;">D</th>
</tr><tr style="height:20px;">
<th align="center" valign="middle" style="color:buttontext;background-color:#E4ECF7;">1</th><td align="left" valign="top" style="color:windowtext;background-color:window;">Hi</td><td align="left" valign="top" style="color:windowtext;background-color:window;">Cell Two</td><td align="left" valign="top" style="color:windowtext;background-color:window;">Actually a longer text</td><td align="left" valign="top" style="color:windowtext;background-color:window;">Final Word</td>
</tr>
</table>
</html>
This question is related to
c#
html
file-io
html-parsing
What kind of processing are you trying to do? You can do XmlDocument doc = new XmlDocument(); followed by doc.Load(filename). Then the XML document can be parsed in memory.
Read here for more information on XmlDocument:
string html = File.ReadAllText(path);
var htmlText = System.IO.File.ReadAllText(@"C:/filename.html");
And if file in at application root, user below
var htmlText = System.IO.File.ReadAllText(HttpContext.Current.Server.MapPath(@"~/filename.html"));
Use System.IO.File.ReadAllText(fileName)
Use File.ReadAllText(path_to_file) to read
You can do it the simple way:
string pathToHTMLFile = @"C:\temp\someFile.html";
string htmlString = File.ReadAllText(pathToHTMLFile);
Or you could stream it in with FileStream/StreamReader:
using (FileStream fs = File.Open(pathToHTMLFile, FileMode.Open, FileAccess.ReadWrite))
{
using (StreamReader sr = new StreamReader(fs))
{
htmlString = sr.ReadToEnd();
}
}
This latter method allows you to open the file while still permitting others to perform Read/Write operations on the file. I can't imagine an HTML file being very big, but it has the added benefit of streaming the file instead of capturing it as one large chunk like the first method.
This is mostly covered already, but one addition as I ran into an issue with the previous code samples.
Dim strHTML as String = System.IO.File.ReadAllText(HttpContext.Current.Server.MapPath("~/folder/filename.html"))
Source: Stackoverflow.com