Can save images to a structured text file C# ?

Dong Lam Trien

Suppose structured

public struct stStaff
{
public WhatType? Picture; // Pictures 3x4 (what kind for pictures ?)
public string FullName; // FullName
public DateTime BirthDay; // Birthday

}

Can save images to a structured text file (note: do not store the path of the image), to save the image of the structure of text files will have style? one example of this?

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Vulpes14y ago
Unfortunately, the code has run off the edge of the screen and so I can't read the part which is giving the error.

However, you can't use BinaryWriter to write a Bitmap directly to a file.

You have to convert the Bitmap to a byte array first and then write that to the file. There is an overload of the Write method which takes a byte array as a parameter:

http://msdn.microsoft.com/en-us/library/bx149a0k.aspx
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Dong Lam Trien14y ago

Suppose I have the structure

public struct st Staff          {             public Bitmap Picture;    // Picturs 3x4             public string FullName;   // Full name             public DateTime BirthDay; // Birthday          }

in my save button code

Path = @"C:\data\database.dat"; FileStream fs; try {     fs = new FileStream(path, FileMode.Create); } catch (Exception ex) {     MessageBox.Show("Error: " + ex.Message);     return; }       BinaryWriter bw = new BinaryWriter(fs);    Staff = new Staff(); Staff.Picture = (Bitmap)pictureBox1.Image; Staff.FullName = txtFullName.Text; Staff.BirthDay = DateTime.Parse(mskNgaysinh.Text);   //ClsStaff Staff;  // Save for (int i = 0; i < list.Count; i++) {    Staff = (Staff)list[i];    bw.Write(Staff.Picture);  // warning error: The best overloaded method match for                          //'System.IO.BinaryWriter.Write(bool)' has some invalid arguments    bw.Write(Staff.FullName);    bw.Write(Staff.BirthDay.ToBinary()); }   bw.Flush(); bw.Close(); fs.Close();

I get an error at this line
bw.Write(Staff.Picture); // warning error: The best overloaded method match for 'System.IO.BinaryWriter.Write(bool)' has some invalid arguments
I wonder in the text file can save the Bitmap type? or to switch to the new chain store? if it is correct on how?

Vulpes14y ago
Well, if you can't save the path of the image in the text file, then you could convert the image to a byte array and then save the byte values to the file. These values will of course range from 0 to 255 and so an ANSI text file could be used.

You'll also need to store its length so that it can be distinguished from the FullName and BirthDay fields within the same record when it's read back.

Check this link for some methods to convert an image to and from a byte array:

http://www.codeproject.com/Articles/15460/C-Image-to-Byte-Array-and-Byte-Array-to-Image-Conv
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