Saving TextBox content in a text file C#

Question

I created this form that allows me to open a txt file and puts the content in a TextBox. I want to be able to modify the content writing in the textbox and then save it using the SaveFileDialog. Here's my code

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1(){
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e){
            if (openFileDialog1.ShowDialog() == DialogResult.OK){
                System.IO.StreamReader input = new
                System.IO.StreamReader(openFileDialog1.FileName);
                TextBox_stampa_contenuto.AppendText(input.ReadToEnd());
                input.Close();
            }
        }

        private void salva_file_Click(object sender, EventArgs e){
            saveFileDialog1.ShowDialog();
        }

        private void saveFileDialog1_FileOk(object sender, CancelEventArgs e){
            string name = saveFileDialog1.FileName;
            File.WriteAllText(name, TextBox_stampa_contenuto.Text);

        }
    }

}

When I run it works perfectly opening the file, but after I modify it and try to save it doesn't work. The content stays the same. There's a way to fix it? And also how can I put the text in the textbox in write mode and not in append mode. Thanks.

Answer 1

Try This:

Solution 1: if you want to Save the contents of Textbox into TextFile you need to check the DialogResult return type of the SaveDialog.

private void salva_file_Click(object sender, EventArgs e)
{
        DialogResult result = saveFileDialog1.ShowDialog();
        if (result == DialogResult.OK)
        {
            string name = saveFileDialog1.FileName;
            File.WriteAllText(name, TextBox_stampa_contenuto.Text);
        }
 }

Solution 2: if you want to Insert the File Text into Textbox whithout appending you need to Assign the File String into TextBox Text property.

if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
  TextBox_stampa_contenuto.Text=System.IO.File.ReadAllText(openFileDialog1.FileName);      
}

Answer 2

using System.CodeDom.Compiler;
using System.Windows.Forms;

namespace Text_Editor
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void ladenToolStripMenuItem_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();
            openFileDialog.Filter = "*.txt|*.txt";
            openFileDialog.ShowDialog(richTextBox1);
            string test = File.ReadAllText(openFileDialog.FileName);
            richTextBox1.Text = test;

        }
        private void speichernToolStripMenuItem_Click(object sender, EventArgs e)
        {
            DialogResult result = saveFileDialog1.ShowDialog();
            if (result == DialogResult.OK)
            {
                string name = saveFileDialog1.FileName;
                File.WriteAllText(name, Tex.Text);
            }
            /*Stream myStream;
            SaveFileDialog saveFileDialog1 = new SaveFileDialog();

            saveFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
            saveFileDialog1.FilterIndex = 2;
            saveFileDialog1.RestoreDirectory = true;

            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                if ((myStream = saveFileDialog1.OpenFile()) != null)
                {
                    // Code to write the stream goes here.
                    myStream.Close();
                }
            }
        */
        }

        private void beendenToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}












namespace Text_Editor
{
    partial class Form1
    {
        /// <summary>
        ///  Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        ///  Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        ///  Required method for Designer support - do not modify
        ///  the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.menuStrip1 = new System.Windows.Forms.MenuStrip();
            this.dateiToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.ladenToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.speichernToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.beendenToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.richTextBox1 = new System.Windows.Forms.RichTextBox();
            this.menuStrip1.SuspendLayout();
            this.SuspendLayout();
            // 
            // menuStrip1
            // 
            this.menuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.dateiToolStripMenuItem});
            this.menuStrip1.Location = new System.Drawing.Point(0, 0);
            this.menuStrip1.Name = "menuStrip1";
            this.menuStrip1.Size = new System.Drawing.Size(800, 24);
            this.menuStrip1.TabIndex = 0;
            this.menuStrip1.Text = "menuStrip1";
            // 
            // dateiToolStripMenuItem
            // 
            this.dateiToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.ladenToolStripMenuItem,
            this.speichernToolStripMenuItem,
            this.beendenToolStripMenuItem});
            this.dateiToolStripMenuItem.Name = "dateiToolStripMenuItem";
            this.dateiToolStripMenuItem.Size = new System.Drawing.Size(46, 20);
            this.dateiToolStripMenuItem.Text = "Datei";
            // 
            // ladenToolStripMenuItem
            // 
            this.ladenToolStripMenuItem.Name = "ladenToolStripMenuItem";
            this.ladenToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
            this.ladenToolStripMenuItem.Text = "Laden";
            this.ladenToolStripMenuItem.Click += new System.EventHandler(this.ladenToolStripMenuItem_Click);
            // 
            // speichernToolStripMenuItem
            // 
            this.speichernToolStripMenuItem.Name = "speichernToolStripMenuItem";
            this.speichernToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
            this.speichernToolStripMenuItem.Text = "Speichern";
            this.speichernToolStripMenuItem.Click += new System.EventHandler(this.speichernToolStripMenuItem_Click);
            // 
            // beendenToolStripMenuItem
            // 
            this.beendenToolStripMenuItem.Name = "beendenToolStripMenuItem";
            this.beendenToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
            this.beendenToolStripMenuItem.Text = "Beenden";
            this.beendenToolStripMenuItem.Click += new System.EventHandler(this.beendenToolStripMenuItem_Click);
            // 
            // richTextBox1
            // 
            this.richTextBox1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.richTextBox1.Location = new System.Drawing.Point(0, 24);
            this.richTextBox1.Name = "richTextBox1";
            this.richTextBox1.Size = new System.Drawing.Size(800, 426);
            this.richTextBox1.TabIndex = 1;
            this.richTextBox1.Text = "";
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(800, 450);
            this.Controls.Add(this.richTextBox1);
            this.Controls.Add(this.menuStrip1);
            this.MainMenuStrip = this.menuStrip1;
            this.Name = "Form1";
            this.Text = "Form1";
            this.menuStrip1.ResumeLayout(false);
            this.menuStrip1.PerformLayout();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion
        private RichTextBox richTextBox1;
        private ToolStripMenuItem dateiToolStripMenuItem;
        private ToolStripMenuItem ladenToolStripMenuItem;
        private ToolStripMenuItem speichernToolStripMenuItem;
        private ToolStripMenuItem beendenToolStripMenuItem;
        private MenuStrip menuStrip1;
    }
}