ASP. NET operations related to txt files (read write save)
- 2021-07-06 10:41:04
- OfStack
ASP. NET Read the contents of the txt file (Notepad):
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.IO;
// Get txt File stream
namespace test
{
public partial class Text : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Response.Write(GetInterIDList("asp.txt"));
}
// Read txt Contents of the file
public string GetInterIDList(string strfile)
{
string strout;
strout = "";
if (!File.Exists(System.Web.HttpContext.Current.Server.MapPath(strfile)))
{
}
else
{
StreamReader sr = new StreamReader(System.Web.HttpContext.Current.Server.MapPath(strfile), System.Text.Encoding.Default);
String input = sr.ReadToEnd();
sr.Close();
strout = input;
}
return strout;
}
}
}
Reading the contents of txt file is to get the file stream. Remember to reference using System. IO; .
ASP. NET Write to txt file (Notepad):
string txtPath = Server.MapPath("~\\Public\\AttInfo\\") + "Test.txt";
StreamWriter sw = new StreamWriter(txtPath, false, System.Text.Encoding.Default);
sw.WriteLine("Hello World");
sw.WriteLine(""); // Output blank lines
sw.WriteLine("ASP.NET Network programming - Script home! ");
sw.Close();
Note: If writing to Notepad does not require a newline, you can use Write, and if you need a newline, you can use WriteLine.
ASP. NET Save the txt file (Notepad):
public void ProcessRequest(HttpContext context)
{
context.Response.Clear();
context.Response.Buffer = true;
//Server.UrlEncode Prevent the saved file name from being garbled
context.Response.AddHeader("Content-Disposition", "attachment;filename=" + context.Server.UrlEncode(" Consumption details " + string.Format("{0:yyyyMMddHHmmss}", System.DateTime.Now) + ".txt"));
context.Response.ContentType = "text/plain";
string message = "Hello World";
// If you want to wrap the exported file, use the Environment.NewLine
message += "Hello World" + Environment.NewLine;
context.Response.Write(message);
// Stop the execution of the page
context.Response.End();
}
Note 3 points:
1. Save the file name garbled problem: encode with Server. UrlEncode
2. Wrap problem in txt file: Environment. NewLine
3. Calls can be made with js: window. location. href= "download. ashx" or window. open ("download. ashx")
The above is about the txt file related operations, if my article is helpful to you, just like it.