this is not a question, this is snippet to encode any file to base64 string and decode that encoded string to that file back. i attach the project to this post too.
Form1.cs :
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace encode_decode_Base64
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void btnEncode_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(txtInFile.Text))
{
FileStream fs = new FileStream(txtInFile.Text,
FileMode.Open,
FileAccess.Read);
byte[] filebytes = new byte[fs.Length];
fs.Read(filebytes, 0, Convert.ToInt32(fs.Length));
string encodedData =
Convert.ToBase64String(filebytes,
Base64FormattingOptions.InsertLineBreaks);
txtEncoded.Text = encodedData;
}
}
private void btnDecode_Click(object sender, EventArgs e)
{
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
byte[] filebytes = Convert.FromBase64String(txtEncoded.Text);
FileStream fs = new FileStream(saveFileDialog1.FileName,
FileMode.CreateNew,
FileAccess.Write,
FileShare.None);
fs.Write(filebytes, 0, filebytes.Length);
fs.Close();
}
}
private void button1_Click(object sender, EventArgs e)
{
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
txtInFile.Text = openFileDialog1.FileName;
}
}
}
}Form1.Designer.cs:
namespace encode_decode_Base64
{
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.btnEncode = new System.Windows.Forms.Button();
this.btnDecode = new System.Windows.Forms.Button();
this.txtEncoded = new System.Windows.Forms.TextBox();
this.txtInFile = new System.Windows.Forms.TextBox();
this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
this.button1 = new System.Windows.Forms.Button();
this.lblBrowse = new System.Windows.Forms.Label();
this.lblEncoded = new System.Windows.Forms.Label();
this.saveFileDialog1 = new System.Windows.Forms.SaveFileDialog();
this.SuspendLayout();
//
// btnEncode
//
this.btnEncode.Location = new System.Drawing.Point(288, 87);
this.btnEncode.Name = "btnEncode";
this.btnEncode.Size = new System.Drawing.Size(75, 23);
this.btnEncode.TabIndex = 1;
this.btnEncode.Text = "Encode";
this.btnEncode.UseVisualStyleBackColor = true;
this.btnEncode.Click += new System.EventHandler(this.btnEncode_Click);
//
// btnDecode
//
this.btnDecode.Location = new System.Drawing.Point(288, 415);
this.btnDecode.Name = "btnDecode";
this.btnDecode.Size = new System.Drawing.Size(75, 23);
this.btnDecode.TabIndex = 2;
this.btnDecode.Text = "Decode";
this.btnDecode.UseVisualStyleBackColor = true;
this.btnDecode.Click += new System.EventHandler(this.btnDecode_Click);
//
// txtEncoded
//
this.txtEncoded.Location = new System.Drawing.Point(28, 155);
this.txtEncoded.Multiline = true;
this.txtEncoded.Name = "txtEncoded";
this.txtEncoded.Size = new System.Drawing.Size(381, 228);
this.txtEncoded.TabIndex = 3;
//
// txtInFile
//
this.txtInFile.Location = new System.Drawing.Point(28, 87);
this.txtInFile.Name = "txtInFile";
this.txtInFile.Size = new System.Drawing.Size(161, 20);
this.txtInFile.TabIndex = 5;
//
// openFileDialog1
//
this.openFileDialog1.FileName = "openFileDialog1";
//
// button1
//
this.button1.Location = new System.Drawing.Point(212, 85);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(43, 23);
this.button1.TabIndex = 6;
this.button1.Text = "...";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// lblBrowse
//
this.lblBrowse.AutoSize = true;
this.lblBrowse.Location = new System.Drawing.Point(35, 57);
this.lblBrowse.Name = "lblBrowse";
this.lblBrowse.Size = new System.Drawing.Size(113, 13);
this.lblBrowse.TabIndex = 7;
this.lblBrowse.Text = "Select a file to encode";
//
// lblEncoded
//
this.lblEncoded.AutoSize = true;
this.lblEncoded.Location = new System.Drawing.Point(35, 126);
this.lblEncoded.Name = "lblEncoded";
this.lblEncoded.Size = new System.Drawing.Size(105, 13);
this.lblEncoded.TabIndex = 8;
this.lblEncoded.Text = "Encoded file content";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(517, 684);
this.Controls.Add(this.lblEncoded);
this.Controls.Add(this.lblBrowse);
this.Controls.Add(this.button1);
this.Controls.Add(this.txtInFile);
this.Controls.Add(this.txtEncoded);
this.Controls.Add(this.btnDecode);
this.Controls.Add(this.btnEncode);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.Button btnEncode;
private System.Windows.Forms.Button btnDecode;
private System.Windows.Forms.TextBox txtEncoded;
private System.Windows.Forms.TextBox txtInFile;
private System.Windows.Forms.OpenFileDialog openFileDialog1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Label lblBrowse;
private System.Windows.Forms.Label lblEncoded;
private System.Windows.Forms.SaveFileDialog saveFileDialog1;
}
}