从流中获取数据构成图片时(Imange.fromSteam(stream s))发生GDI+一般性错误,请高手解决

Question

Image photo;
System.IO.MemoryStream fs = new MemoryStream();
System.IO.BinaryWriter bw=new System.IO.BinaryWriter(fs);....
try
{
   photo=System.Drawing.Image.FromStream(fs);
   photo=new System.Drawing.Bitmap(fs);
}
catch(System.Runtime.InteropServices.ExternalException e)
{
    Console.WriteLine(e.Message);//GDI+发生一般性异常
    Console.WriteLine(e.StackTrace);有的图片会激发这个异常,而且都是相同的.jpg格式的图片}

Answer 1

试这段呢？using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
// 添加新的命名空间。
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;namespace Serialization
{
/// <summary>
/// 对象串行化。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.PictureBox pictureBox1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Button button3;
private System.Windows.Forms.OpenFileDialog openFileDialog1;
private System.Windows.Forms.SaveFileDialog saveFileDialog1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null; public Form1()
{
// Windows 窗体设计器支持所必需的
InitializeComponent();
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
} /// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null) 
{
components.Dispose();
}
}
base.Dispose( disposing );
} #region Windows Form Designer generated code
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.pictureBox1 = new System.Windows.Forms.PictureBox();
this.button2 = new System.Windows.Forms.Button();
this.label1 = new System.Windows.Forms.Label();
this.button3 = new System.Windows.Forms.Button();
this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
this.saveFileDialog1 = new System.Windows.Forms.SaveFileDialog();
this.SuspendLayout();
// 
// button1
// 
this.button1.Location = new System.Drawing.Point(123, 268);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(56, 17);
this.button1.TabIndex = 0;
this.button1.Text = "输出";
this.button1.TextAlign = System.Drawing.ContentAlignment.TopCenter;
this.button1.Click += new System.EventHandler(this.button1_Click);
// 
// textBox1
// 
this.textBox1.Location = new System.Drawing.Point(54, 243);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(240, 21);
this.textBox1.TabIndex = 1;
this.textBox1.Text = "";
// 
// pictureBox1
// 
this.pictureBox1.Dock = System.Windows.Forms.DockStyle.Top;
this.pictureBox1.Location = new System.Drawing.Point(0, 0);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(301, 236);
this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
this.pictureBox1.TabIndex = 2;
this.pictureBox1.TabStop = false;
//this.pictureBox1.Click += new System.EventHandler(this.pictureBox1_Click);
// 
// button2
// 
this.button2.Location = new System.Drawing.Point(206, 268);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(56, 17);
this.button2.TabIndex = 3;
this.button2.Text = "输入";
this.button2.TextAlign = System.Drawing.ContentAlignment.TopCenter;
this.button2.Click += new System.EventHandler(this.button2_Click);
// 
// label1
// 
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(6, 249);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(48, 17);
this.label1.TabIndex = 4;
this.label1.Text = "文件名:";
// 
// button3
// 
this.button3.Location = new System.Drawing.Point(41, 268);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(56, 17);
this.button3.TabIndex = 5;
this.button3.Text = "选择图片";
this.button3.TextAlign = System.Drawing.ContentAlignment.TopCenter;
this.button3.Click += new System.EventHandler(this.button3_Click);
// 
// openFileDialog1
// 
this.openFileDialog1.Filter = "图像文件 (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|自定义文件(*.ser)|*.ser";
// 
// saveFileDialog1
// 
this.saveFileDialog1.FileName = "doc1";
this.saveFileDialog1.Filter = "自定义文件(*.ser)|*.ser";
// 
// Form1
// 
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(301, 287);
this.Controls.Add(this.button3);
this.Controls.Add(this.label1);
this.Controls.Add(this.button2);
this.Controls.Add(this.pictureBox1);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.button1);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
this.MaximizeBox = false;
this.Name = "Form1";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "对象串行化";
this.ResumeLayout(false); }
#endregion /// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main() 
{
Application.Run(new Form1());
}
// 定义私有变量。
// 输出文件流对象。
public Stream s;
// 串行化对象。
public BinaryFormatter f;
// 串行化对象输出。
private void button1_Click(object sender, System.EventArgs e)
{
if(pictureBox1.Image != null)
{
saveFileDialog1.Filter = "自定义文件(*.ser)|*.ser";
if(saveFileDialog1.ShowDialog() == DialogResult.OK)
{
s = File.Create(saveFileDialog1.FileName);
f = new BinaryFormatter();
// 存储图形文件和对应的文件名。
f.Serialize(s, pictureBox1.Image);
f.Serialize(s, textBox1.Text);
s.Close();
}
}
}
// 串行化对象输入。
private void button2_Click(object sender, System.EventArgs e)
{
openFileDialog1.Filter = "自定义文件(*.ser)|*.ser";
if(openFileDialog1.ShowDialog() == DialogResult.OK)
{
s = File.OpenRead(openFileDialog1.FileName);
f = new BinaryFormatter();
pictureBox1.Image = (Image)f.Deserialize(s);
textBox1.Text = (string)f.Deserialize(s);
s.Close();
}
} // 选择要存储的图形文件。
private void button3_Click(object sender, System.EventArgs e)
{
openFileDialog1.Filter = "图形文件(*.bmp;*.jpg;*.jpeg;*.gif)|*.bmp;*.jpg;*.jpeg;*.gif";
if(openFileDialog1.ShowDialog() == DialogResult.OK)
{
pictureBox1.Image = Image.FromFile(openFileDialog1.FileName);
textBox1.Text = openFileDialog1.FileName;
}
}
}
}  

Answer 2

System.IO.MemoryStream fs = new MemoryStream();
System.IO.BinaryWriter bw=new System.IO.BinaryWriter(fs); startIndex=0;
retval=reader.GetBytes(8,startIndex,outbyte,0,bufferSize);
while(retval==bufferSize)
{
bw.Write(outbyte);
bw.Flush(); startIndex += bufferSize;
retval = reader.GetBytes(8, startIndex, outbyte, 0, bufferSize);
}
bw.Write(outbyte, 0, (int)retval - 1);
bw.Flush();
// Close the output file.
try
{
data.photo=System.Drawing.Image.FromStream(fs);
// data.photo=new System.Drawing.Bitmap(fs);
}
catch(System.Runtime.InteropServices.ExternalException e)
{
Console.WriteLine(e.Message);
Console.WriteLine(e.StackTrace); //throw new ApplicationException("300
}
finally
{
bw.Close();
// fs.Close();
}
完整代码如上