如何分割文件？(满分求)

Question

分割一个TXT   按它的大小来分割   每10K一个文件 例如文件5M 则分割成512个文件  这样如何分割呢？

Answer 1

        private void cmdSave_Click(object sender, EventArgs e)
        {
            SaveFileDialog s = new SaveFileDialog();
            s.Filter = "文本文件(*.txt)|*.txt";
            s.ValidateNames = true;
            s.ShowDialog();
            string f = s.FileName;
            if (f != "")
            {
                if (checkBox1.Checked)   // 分割文件
                {
                    f=f.Substring(0,f.Length-4);
                    int id = 1;
                    byte[] buff = Encoding.Default.GetBytes(txtContent.Text);
                    int b = 0, l;
                    int c = 1024 * int.Parse(txtSize.Text);
                    while (b < buff.Length)
                    {                        if (b + c < buff.Length)
                        {
                            string t1 = Encoding.Default.GetString(buff, b,c);
                            string t2 = Encoding.Default.GetString(buff, b, c + 1);
                            if (t2.Length == t1.Length)
                            {
                                l = c - 1;
                            }
                            else
                            {
                                l = c;
                            }
                        }
                        else
                        {
                            l = buff.Length - b;
                        }
                        string fn = f + string.Format("{0:d5}", id) + ".txt";
                        StreamWriter sw = new StreamWriter(fn, false, Encoding.Default);
                        sw.Write(Encoding.Default.GetString(buff, b, l));
                        sw.Close();
                        b += l;
                        ++id;
                    }
                }
                else
                {
                    txtContent.SaveFile(f, RichTextBoxStreamType.PlainText);
                }
            }
        }

Answer 2

txtSize.Text 文件大小 以K位单位。

Answer 3

刚才说错啦！
txtSize.Text 分割块的大小 以K位单位。

Answer 4

txtContent  你这个是干嘛的啊？

Answer 5

是文件的内容， RichTextBox,上面是我编写的程序中的一个部分，供参考！

Answer 6

  private void cmdSave_Click(object sender, EventArgs e)
        {
            SaveFileDialog s = new SaveFileDialog();
            s.Filter = "文本文件(*.txt)|*.txt";
            s.ValidateNames = true;
            s.ShowDialog();
            string f = s.FileName;
            if (f != "")
            {
                if (checkBox1.Checked)   // 分割文件
                {
                    f=f.Substring(0,f.Length-4);
                    int id = 1;
                    byte[] buff = Encoding.Default.GetBytes(txtContent.Text);
                    int b = 0, l;
                    int c = 1024 * int.Parse(txtSize.Text);
                    while (b < buff.Length)
                    {                        if (b + c < buff.Length)
                        {
                            string t1 = Encoding.Default.GetString(buff, b,c);
                            string t2 = Encoding.Default.GetString(buff, b, c + 1);
                            if (t2.Length == t1.Length)
                            {
                                l = c - 1;
                            }
                            else
                            {
                                l = c;
                            }
                        }
                        else
                        {
                            l = buff.Length - b;
                        }
                        string fn = f + string.Format("{0:d5}", id) + ".txt";
                        StreamWriter sw = new StreamWriter(fn, false, Encoding.Default);
                        sw.Write(Encoding.Default.GetString(buff, b, l));
                        sw.Close();
                        b += l;
                        ++id;
                    }
                }
                else
                {
                    txtContent.SaveFile(f, RichTextBoxStreamType.PlainText);
                }
            }
        }

Answer 7

FileStream   vFileStream   =   new   FileStream(vFileName,   FileMode.Open,   FileAccess.Read); 
vBeginPostion   =   0; 
vEndPostion   =   vFileStream.Length; 
while   (true) 
{ 
        vCurrPostion   = vBeginPostion   +   (vEndPostion   -   vBeginPostion)   
        vFileStream.Seek(vCurrPostion,   SeekOrigin.Begin); 
      vReadLength   =   vFileStream.Read(vBuffer,   0,   vBuffer.Length);
 }
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