TemplateEngin.cs
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
namespace FreeSql.Template
{
public clast TemplateEngin : IDisposable {
public interface ITemplateOutput {
///
///
///
/// 返回内容
/// 渲染对象
/// 当前文件路径
///
///
TemplateReturnInfo OuTpUt(StringBuilder tOuTpUt, IDictionary oPtIoNs, string rEfErErFiLeNaMe, TemplateEngin tEmPlAtEsEnDeR);
}
public clast TemplateReturnInfo {
public Dictionary Blocks;
public StringBuilder Sb;
}
public delegate bool TemplateIf(object exp);
public delegate void TemplatePrint(params object[] parms);
private static int _view = 0;
private static Regex _reg = new Regex(@"\{(\$TEMPLATE__CODE|\/\$TEMPLATE__CODE|import\s+|module\s+|extends\s+|block\s+|include\s+|for\s+|if\s+|#|\/for|elseif|else|\/if|\/block|\/module)([^\}]*)\}", RegexOptions.Compiled);
private static Regex _reg_forin = new Regex(@"^([\w_]+)\s*,?\s*([\w_]+)?\s+in\s+(.+)", RegexOptions.Compiled);
private static Regex _reg_foron = new Regex(@"^([\w_]+)\s*,?\s*([\w_]+)?,?\s*([\w_]+)?\s+on\s+(.+)", RegexOptions.Compiled);
private static Regex _reg_forab = new Regex(@"^([\w_]+)\s+([^,]+)\s*,\s*(.+)", RegexOptions.Compiled);
private static Regex _reg_miss = new Regex(@"\{\/?miss\}", RegexOptions.Compiled);
private static Regex _reg_code = new Regex(@"(\{%|%\})", RegexOptions.Compiled);
private static Regex _reg_syntax = new Regex(@"", RegexOptions.Compiled);
private static Regex _reg_blank = new Regex(@"\s+", RegexOptions.Compiled);
private static Regex _reg_complie_undefined = new Regex(@"(当前上下文中不存在名称)?“(\w+)”", RegexOptions.Compiled);
private Dictionary _cache = new Dictionary();
private object _cache_lock = new object();
private string _viewDir;
private string[] _usings;
private FileSystemWatcher _fsw = new FileSystemWatcher();
public TemplateEngin(string viewDir, params string[] usings) {
_viewDir = Utils.TranslateUrl(viewDir);
_usings = usings;
_fsw = new FileSystemWatcher(_viewDir);
_fsw.IncludeSubdirectories = true;
_fsw.Changed += ViewDirChange;
_fsw.Renamed += ViewDirChange;
_fsw.EnableRaisingEvents = true;
}
public void Dispose() {
_fsw.Dispose();
}
void ViewDirChange(object sender, FileSystemEventArgs e) {
string filename = e.FullPath.ToLower();
lock (_cache_lock) {
_cache.Remove(filename);
}
}
public TemplateReturnInfo RenderFile2(StringBuilder sb, IDictionary options, string filename, string refererFilename) {
if (filename[0] == '/' || string.IsNullOrEmpty(refererFilename)) refererFilename = _viewDir;
//else refererFilename = Path.GetDirectoryName(refererFilename);
string filename2 = Utils.TranslateUrl(filename, refererFilename);
Console.WriteLine(filename2);
ITemplateOutput tpl;
if (_cache.TryGetValue(filename2, out tpl) == false) {
string tplcode = File.Exists(filename2) == false ? string.Concat("文件不存在 ", filename) : Utils.ReadTextFile(filename2);
tpl = Parser(tplcode, _usings, options);
lock (_cache_lock) {
if (_cache.ContainsKey(filename2) == false) {
_cache.Add(filename2, tpl);
}
}
}
try {
return tpl.OuTpUt(sb, options, filename2, this);
} catch (Exception ex) {
TemplateReturnInfo ret = sb == null ?
new TemplateReturnInfo { Sb = new StringBuilder(), Blocks = new Dictionary() } :
new TemplateReturnInfo { Sb = sb, Blocks = new Dictionary() };
ret.Sb.Append(refererFilename);
ret.Sb.Append(" -> ");
ret.Sb.Append(filename);
ret.Sb.Append("\r\n");
ret.Sb.Append(ex.Message);
ret.Sb.Append("\r\n");
ret.Sb.Append(ex.StackTrace);
return ret;
}
}
public string RenderFile(string filename, IDictionary options) {
TemplateReturnInfo ret = this.RenderFile2(null, options, filename, null);
return ret.Sb.ToString();
}
private static ITemplateOutput Parser(string tplcode, string[] usings, IDictionary options) {
int view = Interlocked.Increment(ref _view);
StringBuilder sb = new StringBuilder();
IDictionary options_copy = new Hashtable();
foreach (DictionaryEntry options_de in options) options_copy[options_de.Key] = options_de.Value;
sb.AppendFormat(@"
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;{1}
//namespace TplDynamicCodeGenerate {{
public clast TplDynamicCodeGenerate_view{0} : FreeSql.Template.TemplateEngin.ITemplateOutput {{
public FreeSql.Template.TemplateEngin.TemplateReturnInfo OuTpUt(StringBuilder tOuTpUt, IDictionary oPtIoNs, string rEfErErFiLeNaMe, FreeSql.Template.TemplateEngin tEmPlAtEsEnDeR) {{
FreeSql.Template.TemplateEngin.TemplateReturnInfo rTn = tOuTpUt == null ?
new FreeSql.Template.TemplateEngin.TemplateReturnInfo {{ Sb = (tOuTpUt = new StringBuilder()), Blocks = new Dictionary() }} :
new FreeSql.Template.TemplateEngin.TemplateReturnInfo {{ Sb = tOuTpUt, Blocks = new Dictionary() }};
Dictionary TPL__blocks = rTn.Blocks;
Stack TPL__blocks_stack = new Stack();
int[] TPL__blocks_stack_peek;
List TPL__forc = new List();
Func pRoCeSsOpTiOnS = new Func(delegate () {{
IDictionary nEwoPtIoNs = new Hashtable();
foreach (DictionaryEntry oPtIoNs_dE in oPtIoNs)
nEwoPtIoNs[oPtIoNs_dE.Key] = oPtIoNs_dE.Value;
foreach (IDictionary TPL__forc_dIc in TPL__forc)
foreach (DictionaryEntry TPL__forc_dIc_dE in TPL__forc_dIc)
nEwoPtIoNs[TPL__forc_dIc_dE.Key] = TPL__forc_dIc_dE.Value;
return nEwoPtIoNs;
}});
FreeSql.Template.TemplateEngin.TemplateIf tPlIf = delegate(object exp) {{
if (exp is bool) return (bool)exp;
if (exp == null) return false;
if (exp is int && (int)exp == 0) return false;
if (exp is string && (string)exp == string.Empty) return false;
if (exp is long && (long)exp == 0) return false;
if (exp is short && (short)exp == 0) return false;
if (exp is byte && (byte)exp == 0) return false;
if (exp is double && (double)exp == 0) return false;
if (exp is float && (float)exp == 0) return false;
if (exp is decimal && (decimal)exp == 0) return false;
return true;
}};
FreeSql.Template.TemplateEngin.TemplatePrint print = delegate(object[] pArMs) {{
if (pArMs == null || pArMs.Length == 0) return;
foreach (object pArMs_A in pArMs) if (pArMs_A != null) tOuTpUt.Append(pArMs_A);
}};
FreeSql.Template.TemplateEngin.TemplatePrint Print = print;", view, usings?.Any() == true ? $"\r\nusing {string.Join(";\r\nusing ", usings)};" : "");
#region {miss}...{/miss}块内容将不被解析
string[] tmp_content_arr = _reg_miss.Split(tplcode);
if (tmp_content_arr.Length > 1) {
sb.AppendFormat(@"
string[] TPL__MISS = new string[{0}];", Math.Ceiling(1.0 * (tmp_content_arr.Length - 1) / 2));
int miss_len = -1;
for (int a = 1; a < tmp_content_arr.Length; a += 2) {
sb.Append(string.Concat(@"
TPL__MISS[", ++miss_len, @"] = """, Utils.GetConstString(tmp_content_arr[a]), @""";"));
tmp_content_arr[a] = string.Concat("{#TPL__MISS[", miss_len, "]}");
}
tplcode = string.Join("", tmp_content_arr);
}
#endregion
#region 扩展语法如
tplcode = htmlSyntax(tplcode, 3); //
//处理 {% %} 块 c#代码
tmp_content_arr = _reg_code.Split(tplcode);
if (tmp_content_arr.Length == 1) {
tplcode = Utils.GetConstString(tplcode)
.Replace("{%", "{$TEMPLATE__CODE}")
.Replace("%}", "{/$TEMPLATE__CODE}");
} else {
tmp_content_arr[0] = Utils.GetConstString(tmp_content_arr[0]);
for (int a = 1; a < tmp_content_arr.Length; a += 4) {
tmp_content_arr[a] = "{$TEMPLATE__CODE}";
tmp_content_arr[a + 2] = "{/$TEMPLATE__CODE}";
tmp_content_arr[a + 3] = Utils.GetConstString(tmp_content_arr[a + 3]);
}
tplcode = string.Join("", tmp_content_arr);
}
#endregion
sb.Append(@"
tOuTpUt.Append(""");
string error = null;
int tpl_tmpid = 0;
int forc_i = 0;
string extends = null;
Stack codeTree = new Stack();
Stack forEndRepl = new Stack();
sb.Append(_reg.Replace(tplcode, delegate (Match m) {
string _0 = m.Groups[0].Value;
if (!string.IsNullOrEmpty(error)) return _0;
string _1 = m.Groups[1].Value.Trim(' ', '\t');
string _2 = m.Groups[2].Value
.Replace("\\\\", "\\")
.Replace("\\\"", "\"");
_2 = Utils.ReplaceSingleQuote(_2);
switch (_1) {
#region $TEMPLATE__CODE--------------------------------------------------
case "$TEMPLATE__CODE":
codeTree.Push(_1);
return @""");
";
case "/$TEMPLATE__CODE":
string pop = codeTree.Pop();
if (pop != "$TEMPLATE__CODE") {
codeTree.Push(pop);
error = "编译出错，{% 与 %} 并没有配对";
return _0;
}
return @"
tOuTpUt.Append(""";
#endregion
case "include":
return string.Format(@""");
tEmPlAtEsEnDeR.RenderFile2(tOuTpUt, pRoCeSsOpTiOnS(), ""{0}"", rEfErErFiLeNaMe);
tOuTpUt.Append(""", _2);
case "import":
return _0;
case "module":
return _0;
case "/module":
return _0;
case "extends":
//{extends ../inc/layout.html}
if (string.IsNullOrEmpty(extends) == false) return _0;
extends = _2;
return string.Empty;
case "block":
codeTree.Push("block");
return string.Format(@""");
TPL__blocks_stack_peek = new int[] {{ tOuTpUt.Length, 0 }};
TPL__blocks_stack.Push(TPL__blocks_stack_peek);
TPL__blocks.Add(""{0}"", TPL__blocks_stack_peek);
tOuTpUt.Append(""", _2.Trim(' ', '\t'));
case "/block":
codeTreeEnd(codeTree, "block");
return @""");
TPL__blocks_stack_peek = TPL__blocks_stack.Pop();
TPL__blocks_stack_peek[1] = tOuTpUt.Length - TPL__blocks_stack_peek[0];
tOuTpUt.Append(""";
#region ##---------------------------------------------------------
case "#":
if (_2[0] == '#')
return string.Format(@""");
try {{ Print({0}); }} catch {{ }}
tOuTpUt.Append(""", _2.Substring(1));
return string.Format(@""");
Print({0});
tOuTpUt.Append(""", _2);
#endregion
#region for--------------------------------------------------------
case "for":
forc_i++;
int cur_tpl_tmpid = tpl_tmpid;
string sb_endRepl = string.Empty;
StringBuilder sbfor = new StringBuilder();
sbfor.Append(@""");");
Match mfor = _reg_forin.Match(_2);
if (mfor.Success) {
string mfor1 = mfor.Groups[1].Value.Trim(' ', '\t');
string mfor2 = mfor.Groups[2].Value.Trim(' ', '\t');
sbfor.AppendFormat(@"
//new Action(delegate () {{
IDictionary TPL__tmp{0} = new Hashtable();
TPL__forc.Add(TPL__tmp{0});
var TPL__tmp{1} = {3};
var TPL__tmp{2} = {4};", ++tpl_tmpid, ++tpl_tmpid, ++tpl_tmpid, mfor.Groups[3].Value, mfor1);
sb_endRepl = string.Concat(sb_endRepl, string.Format(@"
{0} = TPL__tmp{1};", mfor1, cur_tpl_tmpid + 3));
if (options_copy.Contains(mfor1) == false) options_copy[mfor1] = null;
if (!string.IsNullOrEmpty(mfor2)) {
sbfor.AppendFormat(@"
var TPL__tmp{1} = {0};
{0} = 0;", mfor2, ++tpl_tmpid);
sb_endRepl = string.Concat(sb_endRepl, string.Format(@"
{0} = TPL__tmp{1};", mfor2, tpl_tmpid));
if (options_copy.Contains(mfor2) == false) options_copy[mfor2] = null;
}
sbfor.AppendFormat(@"
if (TPL__tmp{1} != null)
foreach (var TPL__tmp{0} in TPL__tmp{1}) {{", ++tpl_tmpid, cur_tpl_tmpid + 2);
if (!string.IsNullOrEmpty(mfor2))
sbfor.AppendFormat(@"
TPL__tmp{1}[""{0}""] = ++ {0};", mfor2, cur_tpl_tmpid + 1);
sbfor.AppendFormat(@"
TPL__tmp{1}[""{0}""] = TPL__tmp{2};
{0} = TPL__tmp{2};
tOuTpUt.Append(""", mfor1, cur_tpl_tmpid + 1, tpl_tmpid);
codeTree.Push("for");
forEndRepl.Push(sb_endRepl);
return sbfor.ToString();
}
mfor = _reg_foron.Match(_2);
if (mfor.Success) {
string mfor1 = mfor.Groups[1].Value.Trim(' ', '\t');
string mfor2 = mfor.Groups[2].Value.Trim(' ', '\t');
string mfor3 = mfor.Groups[3].Value.Trim(' ', '\t');
sbfor.AppendFormat(@"
//new Action(delegate () {{
IDictionary TPL__tmp{0} = new Hashtable();
TPL__forc.Add(TPL__tmp{0});
var TPL__tmp{1} = {3};
var TPL__tmp{2} = {4};", ++tpl_tmpid, ++tpl_tmpid, ++tpl_tmpid, mfor.Groups[4].Value, mfor1);
sb_endRepl = string.Concat(sb_endRepl, string.Format(@"
{0} = TPL__tmp{1};", mfor1, cur_tpl_tmpid + 3));
if (options_copy.Contains(mfor1) == false) options_copy[mfor1] = null;
if (!string.IsNullOrEmpty(mfor2)) {
sbfor.AppendFormat(@"
var TPL__tmp{1} = {0};", mfor2, ++tpl_tmpid);
sb_endRepl = string.Concat(sb_endRepl, string.Format(@"
{0} = TPL__tmp{1};", mfor2, tpl_tmpid));
if (options_copy.Contains(mfor2) == false) options_copy[mfor2] = null;
}
if (!string.IsNullOrEmpty(mfor3)) {
sbfor.AppendFormat(@"
var TPL__tmp{1} = {0};
{0} = 0;", mfor3, ++tpl_tmpid);
sb_endRepl = string.Concat(sb_endRepl, string.Format(@"
{0} = TPL__tmp{1};", mfor3, tpl_tmpid));
if (options_copy.Contains(mfor3) == false) options_copy[mfor3] = null;
}
sbfor.AppendFormat(@"
if (TPL__tmp{2} != null)
foreach (DictionaryEntry TPL__tmp{1} in TPL__tmp{2}) {{
{0} = TPL__tmp{1}.Key;
TPL__tmp{3}[""{0}""] = {0};", mfor1, ++tpl_tmpid, cur_tpl_tmpid + 2, cur_tpl_tmpid + 1);
if (!string.IsNullOrEmpty(mfor2))
sbfor.AppendFormat(@"
{0} = TPL__tmp{1}.Value;
TPL__tmp{2}[""{0}""] = {0};", mfor2, tpl_tmpid, cur_tpl_tmpid + 1);
if (!string.IsNullOrEmpty(mfor3))
sbfor.AppendFormat(@"
TPL__tmp{1}[""{0}""] = ++ {0};", mfor3, cur_tpl_tmpid + 1);
sbfor.AppendFormat(@"
tOuTpUt.Append(""");
codeTree.Push("for");
forEndRepl.Push(sb_endRepl);
return sbfor.ToString();
}
mfor = _reg_forab.Match(_2);
if (mfor.Success) {
string mfor1 = mfor.Groups[1].Value.Trim(' ', '\t');
sbfor.AppendFormat(@"
//new Action(delegate () {{
IDictionary TPL__tmp{0} = new Hashtable();
TPL__forc.Add(TPL__tmp{0});
var TPL__tmp{1} = {5};
{5} = {3} - 1;
if ({5} == null) {5} = 0;
var TPL__tmp{2} = {4} + 1;
while (++{5} < TPL__tmp{2}) {{
TPL__tmp{0}[""{5}""] = {5};
tOuTpUt.Append(""", ++tpl_tmpid, ++tpl_tmpid, ++tpl_tmpid, mfor.Groups[2].Value, mfor.Groups[3].Value, mfor1);
sb_endRepl = string.Concat(sb_endRepl, string.Format(@"
{0} = TPL__tmp{1};", mfor1, cur_tpl_tmpid + 1));
if (options_copy.Contains(mfor1) == false) options_copy[mfor1] = null;
codeTree.Push("for");
forEndRepl.Push(sb_endRepl);
return sbfor.ToString();
}
return _0;
case "/for":
if (--forc_i < 0) return _0;
codeTreeEnd(codeTree, "for");
return string.Format(@""");
}}{0}
TPL__forc.RemoveAt(TPL__forc.Count - 1);
//}})();
tOuTpUt.Append(""", forEndRepl.Pop());
#endregion
#region if---------------------------------------------------------
case "if":
codeTree.Push("if");
return string.Format(@""");
if ({1}tPlIf({0})) {{
tOuTpUt.Append(""", _2[0] == '!' ? _2.Substring(1) : _2, _2[0] == '!' ? '!' : ' ');
case "elseif":
codeTreeEnd(codeTree, "if");
codeTree.Push("if");
return string.Format(@""");
}} else if ({1}tPlIf({0})) {{
tOuTpUt.Append(""", _2[0] == '!' ? _2.Substring(1) : _2, _2[0] == '!' ? '!' : ' ');
case "else":
codeTreeEnd(codeTree, "if");
codeTree.Push("if");
return @""");
} else {
tOuTpUt.Append(""";
case "/if":
codeTreeEnd(codeTree, "if");
return @""");
}
tOuTpUt.Append(""";
#endregion
}
return _0;
}));
sb.Append(@""");");
if (string.IsNullOrEmpty(extends) == false) {
sb.AppendFormat(@"
FreeSql.Template.TemplateEngin.TemplateReturnInfo eXtEnDs_ReT = tEmPlAtEsEnDeR.RenderFile2(null, pRoCeSsOpTiOnS(), ""{0}"", rEfErErFiLeNaMe);
string rTn_Sb_string = rTn.Sb.ToString();
foreach(string eXtEnDs_ReT_blocks_key in eXtEnDs_ReT.Blocks.Keys) {{
if (rTn.Blocks.ContainsKey(eXtEnDs_ReT_blocks_key)) {{
int[] eXtEnDs_ReT_blocks_value = eXtEnDs_ReT.Blocks[eXtEnDs_ReT_blocks_key];
eXtEnDs_ReT.Sb.Remove(eXtEnDs_ReT_blocks_value[0], eXtEnDs_ReT_blocks_value[1]);
int[] rTn_blocks_value = rTn.Blocks[eXtEnDs_ReT_blocks_key];
eXtEnDs_ReT.Sb.Insert(eXtEnDs_ReT_blocks_value[0], rTn_Sb_string.Substring(rTn_blocks_value[0], rTn_blocks_value[1]));
foreach(string eXtEnDs_ReT_blocks_keyb in eXtEnDs_ReT.Blocks.Keys) {{
if (eXtEnDs_ReT_blocks_keyb == eXtEnDs_ReT_blocks_key) continue;
int[] eXtEnDs_ReT_blocks_valueb = eXtEnDs_ReT.Blocks[eXtEnDs_ReT_blocks_keyb];
if (eXtEnDs_ReT_blocks_valueb[0] >= eXtEnDs_ReT_blocks_value[0])
eXtEnDs_ReT_blocks_valueb[0] = eXtEnDs_ReT_blocks_valueb[0] - eXtEnDs_ReT_blocks_value[1] + rTn_blocks_value[1];
}}
eXtEnDs_ReT_blocks_value[1] = rTn_blocks_value[1];
}}
}}
return eXtEnDs_ReT;
", extends);
} else {
sb.Append(@"
return rTn;");
}
sb.Append(@"
}
}
//}
");
var str = "FreeSql.Template.TemplateEngin.TemplatePrint Print = print;";
int dim_idx = sb.ToString().IndexOf(str) + str.Length;
foreach (string dic_name in options_copy.Keys) {
sb.Insert(dim_idx, string.Format(@"
dynamic {0} = oPtIoNs[""{0}""];", dic_name));
}
//Console.WriteLine(sb.ToString());
return Complie(sb.ToString(), @"TplDynamicCodeGenerate_view" + view);
}
private static string codeTreeEnd(Stack codeTree, string tag) {
string ret = string.Empty;
Stack pop = new Stack();
foreach (string ct in codeTree) {
if (ct == "import" ||
ct == "include") {
pop.Push(1);
} else if (ct == tag) {
pop.Push(2);
break;
} else {
if (string.IsNullOrEmpty(tag) == false) pop.Clear();
break;
}
}
if (pop.Count == 0 && string.IsNullOrEmpty(tag) == false)
return string.Concat("语法错误，{", tag, "} {/", tag, "} 并没配对");
while (pop.Count > 0 && pop.Pop() > 0) codeTree.Pop();
return ret;
}
#region htmlSyntax
private static string htmlSyntax(string tplcode, int num) {
while (num-- > 0) {
string[] arr = _reg_syntax.Split(tplcode);
if (arr.Length == 1) break;
for (int a = 1; a < arr.Length; a += 4) {
string tag = string.Concat('');
int fc = 1;
for (int b = a; fc > 0 && b < arr.Length; b += 4) {
if (b > a && arr[a].ToLower() == arr[b].ToLower()) fc++;
int bpos = 0;
while (true) {
int fa = arr[b + 3].IndexOf(tag, bpos);
int fb = arr[b + 3].IndexOf(end, bpos);
if (b == a) {
var z = arr[b + 3].IndexOf("/>");
if ((fb == -1 || z < fb) && z != -1) {
var y = arr[b + 3].Substring(0, z + 2);
if (_reg_htmltag.IsMatch(y) == false)
fb = z - end.Length + 2;
}
}
if (fa == -1 && fb == -1) break;
if (fa != -1 && (fa < fb || fb == -1)) {
fc++;
bpos = fa + tag.Length;
continue;
}
if (fb != -1) fc--;
if (fc 0) a1 = "elseif";
end3 = "{/if}";
} else {
arr[a] = string.Concat("指令 @", arr[a + 1], "='", arr[a + 2], "' 没紧接着 if/else 指令之后，无效. 2*/) {
string str1 = exp2.Substring(0, first_pos);
string str2 = exp2.Substring(first_pos + 1, quote_pos - first_pos - 1);
string str3 = exp2.Substring(quote_pos + 1);
string str4 = str2.Replace("\"", "\\\"");
quote_pos += str4.Length - str2.Length;
exp2 = string.Concat(str1, "\"", str4, "\"", str3);
break;
}
}
if (quote_pos == -1) break;
}
return exp2;
}
public static string GetConstString(object obj) {
return string.Concat(obj)
.Replace("\\", "\\\\")
.Replace("\"", "\\\"")
.Replace("\r", "\\r")
.Replace("\n", "\\n");
}
public static string ReadTextFile(string path) {
byte[] bytes = ReadFile(path);
return Encoding.UTF8.GetString(bytes).TrimStart((char)65279);
}
public static byte[] ReadFile(string path) {
if (File.Exists(path)) {
string destFileName = Path.GetTempFileName();
File.Copy(path, destFileName, true);
int read = 0;
byte[] data = new byte[1024];
using (MemoryStream ms = new MemoryStream()) {
using (FileStream fs = new FileStream(destFileName, FileMode.OpenOrCreate, FileAccess.Read)) {
do {
read = fs.Read(data, 0, data.Length);
if (read 