Write and Read Text from Text (.txt) file using Thread in ASP.Net

dorsa

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User: dorsa
Posted: on May 18, 2020 03:04 AM
Forum: ASP.Net Web Forms
Answer: 1
Views: 2928

I want to write some numbers from textbox1 to Text1.text file and Immediately after that read the number from Text1.text and show it in textbox2. I write this code in 2 btn. I use the below code: Now I want to use 2 thread in my code: 1. the first one is inserted the number from textbox1 to a txt file 2. sleep the first thread 3. immediately the second thread run and read that number from the file or the first thread. I don't know how can I do this in vb.net web form?! And also I don't know how to use thread in my code:

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="TestThread.aspx.vb" Inherits="WebAppAwaitVB.TestThread" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:TextBox ID="textbox1" runat="server"></asp:TextBox>
            <br />
            <br />
            <asp:Label ID="lblWrietToFile" runat="server" Text="Label"></asp:Label>
            <br />
            <br />
            <asp:Button ID="Button1" runat="server" Text="Write to file" Width="129px" />
            <br />
            <br />
            <br />
            <br />
            <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
            <br />
            <br />
            <asp:Label ID="lblError" runat="server" Text="Label"></asp:Label>
            <br />
            <br />
            <asp:Button ID="Button2" runat="server" Text="Read From File" />
            <br />
        </div>
    </form>
</body>
</html>

Imports System.IO


Public Class TestThread
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    End Sub

    Public Sub WriteToFile()

        Using writer As New StreamWriter("E:\Text.txt", True)
            Dim strNumOne As String = textbox1.Text
            writer.WriteLine(strNumOne)
        End Using

    End Sub

    Public Sub ReadFromFile()
        ' Store the line in this String.
        Dim line As String

        ' Create new StreamReader instance with Using block.
        Using reader As StreamReader = New StreamReader("E:\Text.txt")
            ' Read one line from file
            line = reader.ReadLine
        End Using

        ' Write the line we read from "file.txt"
        TextBox2.Text = line
        Console.WriteLine(line)
    End Sub

    Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        WriteToFile()

        lblWrietToFile.Text = "Write To File has been finished...!"
    End Sub

    Protected Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        ReadFromFile()
    End Sub
End Class

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dharmend...

0 4

Reply
ANSWER
User: dharmendr
Replied: on May 18, 2020 06:51 AM
Report

Hi dorsa,

Refer below code.

HTML

<asp:TextBox ID="textbox1" runat="server"></asp:TextBox>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
<asp:Button runat="server" Text="Write Read File" ID="btnStart" OnClick="btnStart_Click" />

Code

protected void btnStart_Click(object sender, EventArgs e)
{
    Thread thread1 = new Thread(WriteToFile);
    Thread thread2 = new Thread(ReadFromFile);
    thread1.Start();
    Thread.Sleep(2000);
    thread2.Start();
    Thread.Sleep(5000);
}

public void WriteToFile()
{
    using (StreamWriter writer = new StreamWriter(@"D:\Text.txt", true))
    {
        string strNumOne = textbox1.Text;
        writer.WriteLine(strNumOne);
        writer.Close();
    }
}

public void ReadFromFile()
{
    // Store the line in this String.
    string line = "";

    // Create new StreamReader instance with Using block.
    using (StreamReader reader = new StreamReader(@"D:\Text.txt"))
    {
        // Read one line from file
        line = reader.ReadLine();
    }
    // Write the line we read from "file.txt"
    TextBox2.Text = line;
}

VB.Net

Protected Sub btnStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
    Dim thread1 As New Thread(AddressOf WriteTofile)
    Dim thread2 As New Thread(AddressOf ReadFromFiel)
    thread1.Start()
    Thread.Sleep(2000)
    thread2.Start()
    Thread.Sleep(5000)
End Sub

Public Sub WriteTofile()
    Using writer As New StreamWriter("D:\Text.txt", True)
        Dim strNumOne As String = textbox1.Text
        writer.WriteLine(strNumOne)
        writer.Close()
    End Using
End Sub

Public Sub ReadFromFiel()
    Dim line As String = ""

    ' Create new StreamReader instance with Using block.
    Using reader As StreamReader = New StreamReader("D:\Text.txt")
        Do Until reader.EndOfStream
            line = reader.ReadLine()
        Loop

        ' Read one line from file
        'line = reader.ReadLine
        reader.Close()
    End Using

    ' Write the line we read from "file.txt"
    TextBox2.Text = line
End Sub

Screenshot

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Write and Read Text from Text (.txt) file using Thread in ASP.Net

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