How to generate a new html page on the server using asp.net?
I want to make it so that by pressing a button on the homepage a user will be able to create a new html page on the server of the website (e.g. www.example.com/0002.html) I need this page to be alw开发者_如何学JAVAays there and accessible by everyone. How can one create a html page programmably using asp.net?
To create a file on the server, your server side code would need to use a FileStream to write to the disk, just like you would write to the disk in a normal desktop application. The one thing you would need to do is write it inside of the directory which holds your site.
Some code to write a file:
using (StreamWriter sw = new StreamWriter(Server.MapPath("fileName.html")))
using (HtmlTextWriter writer = new HtmlTextWriter(sw))
{
writer.RenderBeginTag(HtmlTextWriterTag.Html);
writer.RenderBeginTag(HtmlTextWriterTag.Head);
writer.Write("Head Contents");
writer.RenderEndTag();
writer.RenderBeginTag(HtmlTextWriterTag.Body);
writer.Write("Body Contents");
writer.RenderEndTag();
writer.RenderEndTag();
}
protected void Button1_Click(object sender, EventArgs e)
{
string body = "<html><body>Web page</body></html>";
//number of current file
int filenumber = 1;
string numberFilePath = "/number.txt";
//change number if some html was already saved and number.txt was created
if (File.Exists(Server.MapPath(numberFilePath)))
{
//open file with saved number
using (StreamReader sr = new StreamReader(numberFilePath))
{
filenumber = int.Parse(sr.ReadLine()) + 1;
}
}
using (StreamWriter sw = new StreamWriter(Server.MapPath(filenumber.ToString("D4") + ".html")))
{
sw.Write(body);
//write last saved html number to file
using (StreamWriter numberWriter = new StreamWriter(Server.MapPath(numberFilePath), false))
{
numberWriter.Write(filenumber);
}
}
}
This is simpliest way I can think of. I didn't test it but it should work. Anyway it's better to use database for that kind of things. And I didn't add any try-catch code to keep code simple...
Just create a new file and save it somewhere that is publicly accessible with the .html file extension. Here's a short script from another SO question:
using (StreamWriter w = new StreamWriter(Server.MapPath("~/page.html"), true))
{
w.WriteLine("<html><body>Hello dere!</body></html>"); // Write the text
}
At it's most basic you could just use a stream writer to make a new text file with the HTML markup inside of it.
var filePath = ""; // What ever you want your path to be
var contentOfPage = "<html>Whatever you are writing</html>";
using (StreamWriter writer = new StreamWriter(Server.MapPath(filePath))
{
writer.WriteLine(contentOfPage);
}
Importantly how are you going to decide what the filenames will be? If you don't add in a mechanism for this you'll just be overwriting the same file every time!
Now you can use the inbuilt .Net method, it's pretty ugly but it works I suppose.
fileName = System.IO.Path.GetRandomFileName();
// You may want to put an html on the end in your case
fileName = System.IO.Path.GetRandomFileName() + ".html";
Here I'd probably implement a bespoke way if I made it, for SEO purposes, but if that's not important
Based on your comments, what you need is such code in the button click event code:
//get all HTML files in current directory that has numeric name:
string strRootPath = Server.MapPath(".");
List<string> arrExistingFiles = Directory.GetFiles(strRootPath, "*.html").ToList().FindAll(fName =>
{
int dummy;
return Int32.TryParse(Path.GetFileNameWithoutExtension(fName), out dummy);
});
//calculate next number based on the maximum file name, plus 1:
int nextFileNumber = arrExistingFiles.ConvertAll(fName => Int32.Parse(Path.GetFileNameWithoutExtension(fName))).Max() + 1;
//generate file name with leading zeros and .html extension:
string strNewFileName = nextFileNumber.ToString().PadLeft(5, '0') + ".html";
string strNewFilePath = Server.MapPath(strNewFileName);
//write contents:
File.WriteAllText(strNewFilePath, body);
//let user option to see the file:
litCreateFileResult.Text = string.Format("File created successfully. <a href=\"{0}\" target=\"_blank\">View</a>", strNewFileName);
The code is pretty much commented, the only thing worth adding is the last line, for this to work add this to your .aspx form:
<asp:Literal ID="litCreateFileResult" runat="server" />
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