自定义服务器控件开发之2：文件上传控件
文件上传的控件，支持上传后事件，跨服务器上传，自定义可上传文件类型、大小，以及上传文件命名规则。
1
using
System.Web.UI.HtmlControls;
2
using
System.Configuration;
3
using
System.ComponentModel;
4
using
System.Web.Security;
5
using
System.Security.Principal;
6
using
System.Drawing;
7
using
System.Drawing.Text;
8
using
System.Collections;
9
using
System.Collections.Specialized;
10
11
namespace
Rungoo.WebCtrlLib
12
{
13
/**//// <summary>
14
/// 文件上传控件
15 /// Author: nowind
16 /// Date: 2006-3-4
17 /// Email: [email protected]
18 /// QQ: 87505959
19
/// </summary>
20 [DefaultProperty("Text"),
21 ToolboxData("<{0}:WebUploadFile runat=server></{0}:WebUploadFile>")]
22 public class WebUploadFile : System.Web.UI.WebControls.WebControl,INamingContainer
23 {
24 private event EventHandler uploaded;
25
26 属性#region 属性
27
28 机器属性#region 机器属性
29 /**//// <summary>
30 /// 域
31 /// </summary>
32 [Bindable(true),
33 Category("Data"),Description("图片存放目标计算机的IP或者机器名，只在跨计算机上传时候填写"),
34 DefaultValue("")]
35 public string ComputerDomain
36 {
37 get { return ViewState["ComputerDomain"] == null ? String.Empty : (string)ViewState["ComputerDomain"] ; }
38 set { ViewState["ComputerDomain"] = value; }
39 }
40
41 /**//// <summary>
42 /// 登陆用户
43 /// </summary>
44 [Bindable(true),
45 Category("Data"),Description("图片存放目标计算机登陆用户，只在跨计算机上传时候填写"),
46 DefaultValue("")]
47 public string ComputerUsername
48 {
49 get { return ViewState["ComputerUsername"] == null ? String.Empty : (string)ViewState["ComputerUsername"] ; }
50 set { ViewState["ComputerUsername"] = value; }
51 }
52
53 /**//// <summary>
54 /// 登陆密码
55 /// </summary>
56 [Bindable(true),
57 Category("Data"),Description("图片存放目标计算机登陆密码，只在跨计算机上传时候填写"),
58 DefaultValue("")]
59 public string ComputerPassword
60 {
61 get { return ViewState["ComputerPassword"] == null ? String.Empty : (string)ViewState["ComputerPassword"] ; }
62 set { ViewState["ComputerPassword"] = value; }
63 }
64
65 /**//// <summary>
66 /// 文件存放路径
67 /// </summary>
68 [Bindable(true),
69 Category("Data"),Description(@"文件存放的物理路径。如果跨计算机上传，则必须填写，且包含完整共享目录路径，且保证该目录Windows权限可写,如 \\192.168.3.1\nowind\upload\；如果上传本地机器，则为图片存放物理目录全路径，如 D:\nowind\113\ ，也可以不填写，自动采用 ComputerUrlPath 指定的目录"),
70 DefaultValue("")]
71 public string ComputerFilePath
72 {
73 get { return ViewState["ComputerFilePath"] == null ? "" : (string)ViewState["ComputerFilePath"] ; }
74 set { ViewState["ComputerFilePath"] = value; }
75 }
76
77 /**//// <summary>
78 /// 文件服务路径
79 /// </summary>
80 [Bindable(true),
81 Category("Data"),Description(@"文件的Web访问路径。跨计算机上传时，必须填写Url完全路径，如 http://192.168.3.1/nowind/upload/ ；如果上传本地机器，则填写站点根目录后的全路径,如upload/file/"),
82 DefaultValue("")]
83 public string ComputerUrlPath
84 {
85 get { return ViewState["ComputerUrlPath"] == null ? String.Empty : (string)ViewState["ComputerUrlPath"] ; }
86 set
87 {
88 value = value.EndsWith(@"/") ? value : value+"/";
89 ViewState["ComputerUrlPath"] = value;
90 }
91 }
92 #endregion
93
94 /**//// <summary>
95 /// 上传成功后是否显示文件信息
96 /// </summary>
97 [Bindable(true),
98 Category("Appearance"),Description("上传成功后是否显示文件信息"),
99 DefaultValue("")]
100 public System.Boolean IsShowFileInfo
101 {
102 get { return ViewState["IsShowFileInfo"] == null ? false : (bool)ViewState["IsShowFileInfo"] ; }
103 set { ViewState["IsShowFileInfo"] = value; }
104 }
105
106 /**//// <summary>
107 /// 文件大小上限
108 /// </summary>
109 [Bindable(true),
110 Category("Data"),Description("文件大小上限，以K为单位，默认为100K，0表示不限制"),
111 DefaultValue("")]
112 public System.Int64 FileMaxSize
113 {
114 get { return ViewState["FileMaxSize"] == null ? 100 : (System.Int64)ViewState["FileMaxSize"] ; }
115 set
116 {
117 if( value < 0 || value > System.Int64.MaxValue)
118 throw new ArgumentException("设置的值超过有效范围");
119 ViewState["FileMaxSize"] = value;
120 }
121 }
122
123 /**//// <summary>
124 /// 是否覆盖服务器上已存在的同名文件
125 /// </summary>
126 [Bindable(true),
127 Category("Data"),Description("是否覆盖服务器上已存在的同名文件"),
128 DefaultValue("")]
129 public System.Boolean IsOverwrite
130 {
131 get { return ViewState["IsOverwrite"] == null ? true : (bool)ViewState["IsOverwrite"] ; }
132 set { ViewState["IsOverwrite"] = value; }
133 }
134
135 /**//// <summary>
136 /// 是否重新命名上传文件
137 /// </summary>
138 [Bindable(true),
139 Category("Data"),Description("是否重新命名上传文件"),
140 DefaultValue("")]
141 public System.Boolean IsRename
142 {
143 get { return ViewState["IsRename"] == null ? true : (bool)ViewState["IsRename"] ; }
144 set { ViewState["IsRename"] = value; }
145 }
146
147 /**//// <summary>
148 /// 文件类型
149 /// </summary>
150 [Bindable(true),
151 Category("Data"),Description("文件类型，多种文件类型以(,)分割，默认为rar,zip,doc,txt,wma,mp3,pdf类型"),
152 DefaultValue("")]
153 public System.String FileType
154 {
155 get { return ViewState["FileType"] == null ? "rar,zip,doc,txt,wma,mp3,pdf" : (string)ViewState["FileType"] ; }
156 set { ViewState["FileType"] = value; }
157 }
158
159 /**//// <summary>
160 /// 文件的完整Url路径
161 /// </summary>
162 [Bindable(true),
163 Category("Data"),Description("文件的完整Url路径,相对于根目录，如image/xxx.jpg"),Browsable(false),
164 DefaultValue("")]
165 public System.String FileFullUrl
166 {
167 get { return ViewState["FileFullUrl"] == null ? String.Empty : (string)ViewState["FileFullUrl"] ; }
168 set { ViewState["FileFullUrl"] = value; }
169 }
170
171 其他属性#region 其他属性
172
173 //控件宽度属性
174 [Bindable(true),
175 Category("Layout"),
176 DefaultValue("")]
177 public override Unit Width
178 {
179 get{ return this.pnlFrame.Width;}
180 set{ this.pnlFrame.Width = value;}
181 }
182
183 //控件高度属性
184 [Bindable(true),
185 Category("Layout"),
186 DefaultValue("")]
187 public override Unit Height
188 {
189 get{ return this.pnlFrame.Height;}
190 set{ this.pnlFrame.Height = value;}
191 }
192
193 //前景色属性
194 [Bindable(true),
195 Category("Appearance"),
196 DefaultValue("")]
197 public override Color ForeColor
198 {
199 get{ return pnlFrame.ForeColor;}
200 set{ this.pnlFrame.ForeColor = value;}
201 }
202
203 //背景色属性
204 [Bindable(true),
205 Category("Appearance"),
206 DefaultValue("")]
207 public override Color BackColor
208 {
209 get{ return pnlFrame.BackColor;}
210 set{ this.pnlFrame.BackColor = value;}
211 }
212
213 //按钮样式
214 [Bindable(true),
215 Category("Appearance"),Description("按钮样式"),
216 DefaultValue("")]
217 public string CssButton
218 {
219 get { return ViewState["CssButton"] == null ? String.Empty : (string)ViewState["CssButton"] ; }
220 set { ViewState["CssButton"] = value; }
221 }
222
223 //浏览框样式属性
224 [Bindable(true),
225 Category("Appearance"),Description("浏览框样式属性"),
226 DefaultValue("")]
227 public string CssInputFile
228 {
229 get { return ViewState["CssInputFile"] == null ? String.Empty : (string)ViewState["CssInputFile"] ; }
230 set { ViewState["CssInputFile"] = value; }
231 }
232
233 //文字样式属性
234 [Bindable(true),
235 Category("Appearance"),Description("文字样式属性"),
236 DefaultValue("")]
237 public override string CssClass
238 {
239 get { return ViewState["CssClass"] == null ? String.Empty : (string)ViewState["CssClass"] ; }
240 set { ViewState["CssClass"] = value; }
241 }
242
243 //控件边框颜色属性
244 [Bindable(true),
245 Category("Appearance"),
246 DefaultValue("")]
247 public override Color BorderColor
248 {
249 get{ return this.pnlFrame.BorderColor;}
250 set{ this.pnlFrame.BorderColor = value;}
251 }
252
253 //控件边框样式属性
254 [Bindable(true),
255 Category("Appearance"),
256 DefaultValue("")]
257 public override BorderStyle BorderStyle
258 {
259 get{ return this.pnlFrame.BorderStyle;}
260 set{ this.pnlFrame.BorderStyle = value;}
261 }
262
263 //控件边框宽度属性
264 [Bindable(true),
265 Category("Appearance"),
266 DefaultValue("")]
267 public override Unit BorderWidth
268 {
269 get{ return this.pnlFrame.BorderWidth;}
270 set{ this.pnlFrame.BorderWidth = value;}
271 }
272
273 #endregion
274
275 //处理上传成功后用户自定义事件
276 [Bindable(true),
277 Category("Action"), Description("处理上传成功后用户自定义事件"),
278 DefaultValue("")]
279 public event EventHandler Uploaded
280 {
281 add{ this.uploaded += value;}
282 remove{ this.uploaded -= value;}
283 }
284 #endregion
285
286 声明子控件#region 声明子控件
287 private Label lblInfo = new Label(); //用于文件信息
288 private Label lblMsg = new Label(); //上传文件重命名称
289 private System.Web.UI.WebControls.FileUpload fileUpload = new FileUpload(); //浏览本地文件
290 private System.Web.UI.HtmlControls.HtmlButton btnUpload = new HtmlButton(); //上传按钮
291 private Panel pnlFrame = new Panel(); //承载其它控件的容器Panel控件
292 #endregion
293
294 构造函数初始化子控件#region 构造函数初始化子控件
295 public WebUploadFile()
296 {
297 this.fileUpload.ID = "fileUpload";
298
299 this.lblInfo.ID = "lblInfo";
300 this.lblInfo.Text = this.FileFullUrl;
301 this.lblInfo.Visible = false;
302
303 this.lblMsg.ID = "lblMsg";
304 this.lblMsg.Text = "";
305 this.lblMsg.ForeColor = Color.Red;
306 this.lblMsg.Visible = false;
307
308 this.btnUpload.ID = "btnUpload";
309 this.btnUpload.InnerText = "上传";
310 this.btnUpload.ServerClick += new EventHandler(this.Upload_Click);
311
312 this.pnlFrame.ForeColor = this.ForeColor;
313 this.pnlFrame.BackColor = Color.Empty;
314
315 //将子控件添加到此自定义控件中
316 this.Controls.Add(fileUpload);
317 this.Controls.Add(lblInfo);
318 this.Controls.Add(lblMsg);
319 this.Controls.Add(btnUpload);
320 this.Controls.Add(pnlFrame);
321 }
322
323 #endregion
324
325 创建子控件#region 创建子控件
326 protected override void EnsureChildControls()
327 {
328
329 }
330 #endregion
331
332 将此控件呈现给指定的输出参数#region 将此控件呈现给指定的输出参数
333 /**//// <summary>
334 /// 将此控件呈现给指定的输出参数。
335 /// </summary>
336 /// <param name="output"> 要写出到的 HTML 编写器 </param>
337 protected override void Render(HtmlTextWriter output)
338 {
339 //开始输出
340 output.AddAttribute(HtmlTextWriterAttribute.Id,base.ID);
341 this.pnlFrame.RenderBeginTag(output);
342
343 //在Panel中绘制表格
344 output.AddAttribute(HtmlTextWriterAttribute.Border,"0");
345 output.AddAttribute(HtmlTextWriterAttribute.Cellpadding,"0");
346 output.AddAttribute(HtmlTextWriterAttribute.Cellspacing,"0");
347 output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Width,"100%");
348 //output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Height,"25px");
349
350 output.RenderBeginTag(HtmlTextWriterTag.Table);
351
352 output.RenderBeginTag(HtmlTextWriterTag.Tr);
353 output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Align,"Left");
354 //output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Width,"70%");
355 output.RenderBeginTag(HtmlTextWriterTag.Td);
356
357 //文件浏览框
358 //output.Write("<input name=\"" + base.ID + ":fileUpload\" id=\"" + base.ID + "_fileUpload\" class=\"" + this.CssInputFile + "\" style=\"width:75%\" type=\"file\" />");
359 this.fileUpload.Attributes.Add("Width", "70%");
360 this.fileUpload.Attributes.Add("Class", this.CssInputFile);
361 this.fileUpload.RenderControl(output);
362 output.Write(" ");
363 //上传按钮
364 //this.btnUpload.Attributes.Add("OnClick","javascript:if(document.getElementById('"+this.ID+"_fileUpload').value==''){alert('请浏览上传的文件');return false;}");
365 this.btnUpload.Attributes.Add("Class", this.CssButton);
366 this.btnUpload.CausesValidation = false;
367 this.btnUpload.RenderControl(output);
368
369 output.Write(" ");
370 //上传结果信息
371 this.lblMsg.RenderControl(output);
372 output.RenderEndTag();
373 output.RenderEndTag();
374
375 //显示文件信息
376 if( this.IsShowFileInfo == true )
377 {
378 output.RenderBeginTag(HtmlTextWriterTag.Tr);
379 output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Valign,"Middle");
380 output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Height,"24px");
381 output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Class,this.CssClass);
382 output.RenderBeginTag(HtmlTextWriterTag.Td);
383 output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Align,"left");
384 output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Valign,"absmiddle");
385
386 this.lblInfo.RenderControl(output);
387
388 output.RenderEndTag();// </td>
389 output.RenderEndTag();// </tr>
390 }
391
392 output.RenderEndTag();// </table>
393
394 //结束输出
395 this.pnlFrame.RenderEndTag(output);
396 }
397 #endregion
398
399 上载文件#region 上载文件
400 private void Upload_Click(object sender, System.EventArgs e)
401 {
402 this.lblInfo.Visible = false;
403 //this.lblInfo.Text = "";
404 this.lblMsg.Visible = false;
405 this.lblMsg.Text = "";
406
407 System.Web.UI.ClientScriptManager client = this.Page.ClientScript;
408 Type cstype = Page.GetType();
409
410 //站点根路径
411 string appPath = FileClass.GetApplicationPath();
412
413 // 判断路径
414 if( this.fileUpload.PostedFile == null || this.fileUpload.PostedFile.ToString() == "" )
415 {
416 //this.lblMsg.Text = "未发现操作文件";
417 //this.lblMsg.Visible = true;
418 client.RegisterStartupScript(cstype, "error", "<script language='javascript'>alert('未发现操作文件')</script>");
419 return;
420 }
421
422 FileClass classValidUser = new FileClass();
423 if( this.ComputerDomain != "" ) //如果计算机地址设置不为空则默认为存放文件到远程计算机
424 {
425 bool loginResult = false; //登陆远程计算机成功与否
426 loginResult = classValidUser.ImpersonateValidUser(this.ComputerUsername , this.ComputerPassword , this.ComputerDomain );
427 if( loginResult == false )
428 {
429 //lblMsg.Visible = true;
430 //lblMsg.Text = "登陆远程服务器失败";
431 client.RegisterStartupScript(cstype, "error", "<script language='javascript'>alert('登陆远程服务器失败')</script>");
432 return;
433 }
434 }
435
436 try
437 {
438 string fileName = null; //保存的文件短名称
439 HttpPostedFile filImage = this.fileUpload.PostedFile;
440 string sourceFileName = null; //原始文件名称
441 sourceFileName= System.IO.Path.GetFileName(filImage.FileName);
442 string sourceFileExtension = System.IO.Path.GetExtension(sourceFileName).ToLower();//扩展名 如.jpg
443
444 StringCollection sc = new StringCollection();
445 foreach( string str in this.FileType.Split(',') )
446 sc.Add( "."+str.ToLower() );
447 if( !sc.Contains(sourceFileExtension) )
448 {
449 client.RegisterStartupScript(cstype, "error", "<script language='javascript'>alert('文件格式不对')</script>");
450 return;
451 }
452
453 // 文件大小
454 int fileLen = filImage.ContentLength;
455 if( this.FileMaxSize != 0 ) //为0则不限制上传文件大小
456 {
457 // 判断文件大小
458 if(fileLen < 0 || fileLen > this.FileMaxSize * 1024)
459 {
460 string msg = "文件大小不能超过"+this.FileMaxSize+"K";
461 client.RegisterStartupScript(cstype, "error", "<script language='javascript'>alert('" + msg + "')</script>");
462 return;
463 }
464 }
465
466 // 读取文件到缓存
467 byte[] bufData = new byte[fileLen];
468 filImage.InputStream.Read(bufData, 0, fileLen);
469 MemoryStream ms = new MemoryStream(bufData);
470 if( this.IsRename )
471 {
472 // 以时间命名文件名,精确到毫秒
473 DateTime dtNow = DateTime.Now;
474 fileName = dtNow.ToString("yyyyMMddhhmmss")+DateTime.Now.Millisecond.ToString("000")+sourceFileExtension;
475 }
476 else
477 fileName = sourceFileName;
478
479 // 文件存放路径文件夹
480 string filePath = "";
481 if(this.ComputerFilePath == null || this.ComputerFilePath == "" )
482 {
483 filePath = appPath + this.ComputerUrlPath;
484 filePath = filePath.EndsWith(@"/") ? filePath : filePath+"/";
485 filePath = filePath.Replace(@"//",@"/");
486 filePath = this.Page.Server.MapPath( filePath );
487 }
488 else
489 filePath = this.ComputerFilePath.Replace(@"/",@"\");
490 filePath = filePath.EndsWith(@"\") == true ? filePath : filePath + @"\";
491 string fileFullPath = filePath + fileName;
492
493 //返回文件url全路径，以"/"结尾
494 string fileUrlPath = this.ComputerUrlPath.Replace(@"\",@"/");
495 fileUrlPath = this.ComputerUrlPath.EndsWith(@"/") == true ? this.ComputerUrlPath : this.ComputerUrlPath + @"/";
496 fileUrlPath += fileName;
497
498 // 判断存放图片文件的目录是否存在，如果不存在，则创建。
499 DirectoryInfo di = new DirectoryInfo(filePath);
500 if( di.Attributes == FileAttributes.ReadOnly )
501 {
502 string msg = "指定文件夹为只读，不能写入文件";
503 client.RegisterStartupScript(cstype, "error", "<script language='javascript'>alert('" + msg + "')</script>");
504 return;
505 }
506 if(!Directory.Exists(filePath))
507 Directory.CreateDirectory(filePath);
508 if( File.Exists( fileFullPath ) && !this.IsOverwrite )
509 {
510 string msg = "文件已经存在";
511 client.RegisterStartupScript(cstype, "error", "<script language='javascript'>alert('" + msg + "')</script>");
512 return;
513 }
514
515 // 把文件写入服务器
516 FileStream newFile = new FileStream(fileFullPath,FileMode.Create);
517 newFile.Write(bufData,0,fileLen);
518 newFile.Flush();
519 newFile.Close();
520
521 // 注销远程登陆
522 if( this.ComputerDomain != "" )
523 classValidUser.UndoImpersonation();
524
525 //返回文件路径
526 this.FileFullUrl = fileUrlPath;
527
528 //保存路径信息
529 lblMsg.Visible=true;
530 lblMsg.Text="上载成功";
531 lblInfo.Visible = true;
532 double size = (double)fileLen/1024;
533 lblInfo.Text = "文件名:"+fileName+" 文件大小:"+size.ToString("0.00")+"K";
534
535 //激发用户自定义事件
536 if( uploaded != null )
537 uploaded(this,new System.EventArgs());
538
539 }
540 catch(Exception ex)
541 {
542 lblMsg.Visible=true;
543 lblMsg.Text="上载失败："+ex.Message;
544 lblInfo.Visible = false;
545 }
546 }
547 #endregion
548
549 }
550
}
using
System.Web.UI.HtmlControls;2
using
System.Configuration;3
using
System.ComponentModel;4
using
System.Web.Security;5
using
System.Security.Principal;6
using
System.Drawing;7
using
System.Drawing.Text;8
using
System.Collections;9
using
System.Collections.Specialized;10
11
namespace
Rungoo.WebCtrlLib12
{13
/**//// <summary>14
/// 文件上传控件15
/// Author: nowind16
/// Date: 2006-3-417
/// Email: [email protected]18
/// QQ: 8750595919
/// </summary>20
[DefaultProperty("Text"), 21
ToolboxData("<{0}:WebUploadFile runat=server></{0}:WebUploadFile>")]22
public class WebUploadFile : System.Web.UI.WebControls.WebControl,INamingContainer23
{24
private event EventHandler uploaded;25
26
属性#region 属性27
28
机器属性#region 机器属性29
/**//// <summary>30
/// 域31
/// </summary>32
[Bindable(true), 33
Category("Data"),Description("图片存放目标计算机的IP或者机器名，只在跨计算机上传时候填写"),34
DefaultValue("")] 35
public string ComputerDomain36
{37
get { return ViewState["ComputerDomain"] == null ? String.Empty : (string)ViewState["ComputerDomain"] ; }38
set { ViewState["ComputerDomain"] = value; }39
}40
41
/**//// <summary>42
/// 登陆用户43
/// </summary>44
[Bindable(true), 45
Category("Data"),Description("图片存放目标计算机登陆用户，只在跨计算机上传时候填写"),46
DefaultValue("")] 47
public string ComputerUsername48
{49
get { return ViewState["ComputerUsername"] == null ? String.Empty : (string)ViewState["ComputerUsername"] ; }50
set { ViewState["ComputerUsername"] = value; }51
}52
53
/**//// <summary>54
/// 登陆密码55
/// </summary>56
[Bindable(true), 57
Category("Data"),Description("图片存放目标计算机登陆密码，只在跨计算机上传时候填写"),58
DefaultValue("")] 59
public string ComputerPassword60
{61
get { return ViewState["ComputerPassword"] == null ? String.Empty : (string)ViewState["ComputerPassword"] ; }62
set { ViewState["ComputerPassword"] = value; }63
}64
65
/**//// <summary>66
/// 文件存放路径67
/// </summary>68
[Bindable(true), 69
Category("Data"),Description(@"文件存放的物理路径。如果跨计算机上传，则必须填写，且包含完整共享目录路径，且保证该目录Windows权限可写,如 \\192.168.3.1\nowind\upload\；如果上传本地机器，则为图片存放物理目录全路径，如 D:\nowind\113\ ，也可以不填写，自动采用 ComputerUrlPath 指定的目录"),70
DefaultValue("")] 71
public string ComputerFilePath72
{73
get { return ViewState["ComputerFilePath"] == null ? "" : (string)ViewState["ComputerFilePath"] ; }74
set { ViewState["ComputerFilePath"] = value; }75
}76
77
/**//// <summary>78
/// 文件服务路径79
/// </summary>80
[Bindable(true), 81
Category("Data"),Description(@"文件的Web访问路径。跨计算机上传时，必须填写Url完全路径，如 http://192.168.3.1/nowind/upload/ ；如果上传本地机器，则填写站点根目录后的全路径,如upload/file/"),82
DefaultValue("")] 83
public string ComputerUrlPath84
{85
get { return ViewState["ComputerUrlPath"] == null ? String.Empty : (string)ViewState["ComputerUrlPath"] ; }86
set 87
{88
value = value.EndsWith(@"/") ? value : value+"/";89
ViewState["ComputerUrlPath"] = value; 90
}91
}92
#endregion93
94
/**//// <summary>95
/// 上传成功后是否显示文件信息96
/// </summary>97
[Bindable(true), 98
Category("Appearance"),Description("上传成功后是否显示文件信息"),99
DefaultValue("")] 100
public System.Boolean IsShowFileInfo101
{102
get { return ViewState["IsShowFileInfo"] == null ? false : (bool)ViewState["IsShowFileInfo"] ; }103
set { ViewState["IsShowFileInfo"] = value; }104
}105
106
/**//// <summary>107
/// 文件大小上限108
/// </summary>109
[Bindable(true), 110
Category("Data"),Description("文件大小上限，以K为单位，默认为100K，0表示不限制"),111
DefaultValue("")] 112
public System.Int64 FileMaxSize113
{114
get { return ViewState["FileMaxSize"] == null ? 100 : (System.Int64)ViewState["FileMaxSize"] ; }115
set 116
{ 117
if( value < 0 || value > System.Int64.MaxValue)118
throw new ArgumentException("设置的值超过有效范围");119
ViewState["FileMaxSize"] = value; 120
}121
}122
123
/**//// <summary>124
/// 是否覆盖服务器上已存在的同名文件125
/// </summary>126
[Bindable(true), 127
Category("Data"),Description("是否覆盖服务器上已存在的同名文件"),128
DefaultValue("")] 129
public System.Boolean IsOverwrite130
{131
get { return ViewState["IsOverwrite"] == null ? true : (bool)ViewState["IsOverwrite"] ; }132
set { ViewState["IsOverwrite"] = value; }133
}134
135
/**//// <summary>136
/// 是否重新命名上传文件137
/// </summary>138
[Bindable(true), 139
Category("Data"),Description("是否重新命名上传文件"),140
DefaultValue("")] 141
public System.Boolean IsRename142
{143
get { return ViewState["IsRename"] == null ? true : (bool)ViewState["IsRename"] ; }144
set { ViewState["IsRename"] = value; }145
}146
147
/**//// <summary>148
/// 文件类型149
/// </summary>150
[Bindable(true), 151
Category("Data"),Description("文件类型，多种文件类型以(,)分割，默认为rar,zip,doc,txt,wma,mp3,pdf类型"),152
DefaultValue("")] 153
public System.String FileType154
{155
get { return ViewState["FileType"] == null ? "rar,zip,doc,txt,wma,mp3,pdf" : (string)ViewState["FileType"] ; }156
set { ViewState["FileType"] = value; }157
}158
159
/**//// <summary>160
/// 文件的完整Url路径161
/// </summary>162
[Bindable(true), 163
Category("Data"),Description("文件的完整Url路径,相对于根目录，如image/xxx.jpg"),Browsable(false),164
DefaultValue("")] 165
public System.String FileFullUrl166
{167
get { return ViewState["FileFullUrl"] == null ? String.Empty : (string)ViewState["FileFullUrl"] ; }168
set { ViewState["FileFullUrl"] = value; }169
}170
171
其他属性#region 其他属性172
173
//控件宽度属性 174
[Bindable(true), 175
Category("Layout"), 176
DefaultValue("")] 177
public override Unit Width178
{179
get{ return this.pnlFrame.Width;}180
set{ this.pnlFrame.Width = value;}181
}182
183
//控件高度属性 184
[Bindable(true), 185
Category("Layout"), 186
DefaultValue("")] 187
public override Unit Height188
{189
get{ return this.pnlFrame.Height;}190
set{ this.pnlFrame.Height = value;}191
}192
193
//前景色属性 194
[Bindable(true), 195
Category("Appearance"), 196
DefaultValue("")] 197
public override Color ForeColor198
{199
get{ return pnlFrame.ForeColor;}200
set{ this.pnlFrame.ForeColor = value;}201
}202
203
//背景色属性 204
[Bindable(true), 205
Category("Appearance"), 206
DefaultValue("")] 207
public override Color BackColor208
{209
get{ return pnlFrame.BackColor;}210
set{ this.pnlFrame.BackColor = value;}211
}212
213
//按钮样式214
[Bindable(true), 215
Category("Appearance"),Description("按钮样式"),216
DefaultValue("")] 217
public string CssButton 218
{219
get { return ViewState["CssButton"] == null ? String.Empty : (string)ViewState["CssButton"] ; }220
set { ViewState["CssButton"] = value; }221
}222
223
//浏览框样式属性224
[Bindable(true), 225
Category("Appearance"),Description("浏览框样式属性"),226
DefaultValue("")] 227
public string CssInputFile228
{229
get { return ViewState["CssInputFile"] == null ? String.Empty : (string)ViewState["CssInputFile"] ; }230
set { ViewState["CssInputFile"] = value; }231
}232
233
//文字样式属性234
[Bindable(true), 235
Category("Appearance"),Description("文字样式属性"),236
DefaultValue("")] 237
public override string CssClass 238
{239
get { return ViewState["CssClass"] == null ? String.Empty : (string)ViewState["CssClass"] ; }240
set { ViewState["CssClass"] = value; }241
}242
243
//控件边框颜色属性 244
[Bindable(true), 245
Category("Appearance"), 246
DefaultValue("")] 247
public override Color BorderColor248
{249
get{ return this.pnlFrame.BorderColor;}250
set{ this.pnlFrame.BorderColor = value;}251
}252
253
//控件边框样式属性 254
[Bindable(true), 255
Category("Appearance"), 256
DefaultValue("")] 257
public override BorderStyle BorderStyle258
{259
get{ return this.pnlFrame.BorderStyle;}260
set{ this.pnlFrame.BorderStyle = value;}261
}262
263
//控件边框宽度属性 264
[Bindable(true), 265
Category("Appearance"), 266
DefaultValue("")] 267
public override Unit BorderWidth268
{269
get{ return this.pnlFrame.BorderWidth;}270
set{ this.pnlFrame.BorderWidth = value;}271
}272
273
#endregion274
275
//处理上传成功后用户自定义事件276
[Bindable(true), 277
Category("Action"), Description("处理上传成功后用户自定义事件"),278
DefaultValue("")] 279
public event EventHandler Uploaded280
{281
add{ this.uploaded += value;}282
remove{ this.uploaded -= value;}283
}284
#endregion285
286
声明子控件#region 声明子控件287
private Label lblInfo = new Label(); //用于文件信息288
private Label lblMsg = new Label(); //上传文件重命名称289
private System.Web.UI.WebControls.FileUpload fileUpload = new FileUpload(); //浏览本地文件290
private System.Web.UI.HtmlControls.HtmlButton btnUpload = new HtmlButton(); //上传按钮291
private Panel pnlFrame = new Panel(); //承载其它控件的容器Panel控件292
#endregion293
294
构造函数初始化子控件#region 构造函数初始化子控件295
public WebUploadFile()296
{297
this.fileUpload.ID = "fileUpload";298
299
this.lblInfo.ID = "lblInfo";300
this.lblInfo.Text = this.FileFullUrl;301
this.lblInfo.Visible = false;302
303
this.lblMsg.ID = "lblMsg";304
this.lblMsg.Text = "";305
this.lblMsg.ForeColor = Color.Red;306
this.lblMsg.Visible = false;307
308
this.btnUpload.ID = "btnUpload";309
this.btnUpload.InnerText = "上传";310
this.btnUpload.ServerClick += new EventHandler(this.Upload_Click);311
312
this.pnlFrame.ForeColor = this.ForeColor;313
this.pnlFrame.BackColor = Color.Empty;314
315
//将子控件添加到此自定义控件中316
this.Controls.Add(fileUpload);317
this.Controls.Add(lblInfo);318
this.Controls.Add(lblMsg);319
this.Controls.Add(btnUpload);320
this.Controls.Add(pnlFrame);321
}322
323
#endregion324
325
创建子控件#region 创建子控件326
protected override void EnsureChildControls()327
{328
329
}330
#endregion331
332
将此控件呈现给指定的输出参数#region 将此控件呈现给指定的输出参数333
/**//// <summary> 334
/// 将此控件呈现给指定的输出参数。335
/// </summary>336
/// <param name="output"> 要写出到的 HTML 编写器 </param>337
protected override void Render(HtmlTextWriter output)338
{339
//开始输出340
output.AddAttribute(HtmlTextWriterAttribute.Id,base.ID);341
this.pnlFrame.RenderBeginTag(output);342
343
//在Panel中绘制表格344
output.AddAttribute(HtmlTextWriterAttribute.Border,"0");345
output.AddAttribute(HtmlTextWriterAttribute.Cellpadding,"0");346
output.AddAttribute(HtmlTextWriterAttribute.Cellspacing,"0");347
output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Width,"100%");348
//output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Height,"25px");349
350
output.RenderBeginTag(HtmlTextWriterTag.Table); 351
352
output.RenderBeginTag(HtmlTextWriterTag.Tr);353
output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Align,"Left"); 354
//output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Width,"70%");355
output.RenderBeginTag(HtmlTextWriterTag.Td);356
357
//文件浏览框358
//output.Write("<input name=\"" + base.ID + ":fileUpload\" id=\"" + base.ID + "_fileUpload\" class=\"" + this.CssInputFile + "\" style=\"width:75%\" type=\"file\" />");359
this.fileUpload.Attributes.Add("Width", "70%");360
this.fileUpload.Attributes.Add("Class", this.CssInputFile);361
this.fileUpload.RenderControl(output);362
output.Write(" ");363
//上传按钮364
//this.btnUpload.Attributes.Add("OnClick","javascript:if(document.getElementById('"+this.ID+"_fileUpload').value==''){alert('请浏览上传的文件');return false;}");365
this.btnUpload.Attributes.Add("Class", this.CssButton);366
this.btnUpload.CausesValidation = false;367
this.btnUpload.RenderControl(output);368
369
output.Write(" ");370
//上传结果信息371
this.lblMsg.RenderControl(output);372
output.RenderEndTag();373
output.RenderEndTag();374
375
//显示文件信息376
if( this.IsShowFileInfo == true )377
{378
output.RenderBeginTag(HtmlTextWriterTag.Tr);379
output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Valign,"Middle");380
output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Height,"24px");381
output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Class,this.CssClass);382
output.RenderBeginTag(HtmlTextWriterTag.Td);383
output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Align,"left");384
output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Valign,"absmiddle");385
386
this.lblInfo.RenderControl(output);387
388
output.RenderEndTag();// </td>389
output.RenderEndTag();// </tr>390
}391
392
output.RenderEndTag();// </table>393
394
//结束输出395
this.pnlFrame.RenderEndTag(output);396
}397
#endregion 398
399
上载文件#region 上载文件400
private void Upload_Click(object sender, System.EventArgs e)401
{402
this.lblInfo.Visible = false;403
//this.lblInfo.Text = "";404
this.lblMsg.Visible = false;405
this.lblMsg.Text = "";406
407
System.Web.UI.ClientScriptManager client = this.Page.ClientScript;408
Type cstype = Page.GetType();409
410
//站点根路径411
string appPath = FileClass.GetApplicationPath();412
413
// 判断路径414
if( this.fileUpload.PostedFile == null || this.fileUpload.PostedFile.ToString() == "" )415
{416
//this.lblMsg.Text = "未发现操作文件";417
//this.lblMsg.Visible = true;418
client.RegisterStartupScript(cstype, "error", "<script language='javascript'>alert('未发现操作文件')</script>");419
return;420
}421
422
FileClass classValidUser = new FileClass();423
if( this.ComputerDomain != "" ) //如果计算机地址设置不为空则默认为存放文件到远程计算机424
{425
bool loginResult = false; //登陆远程计算机成功与否426
loginResult = classValidUser.ImpersonateValidUser(this.ComputerUsername , this.ComputerPassword , this.ComputerDomain );427
if( loginResult == false )428
{429
//lblMsg.Visible = true;430
//lblMsg.Text = "登陆远程服务器失败";431
client.RegisterStartupScript(cstype, "error", "<script language='javascript'>alert('登陆远程服务器失败')</script>");432
return;433
}434
}435
436
try437
{438
string fileName = null; //保存的文件短名称439
HttpPostedFile filImage = this.fileUpload.PostedFile;440
string sourceFileName = null; //原始文件名称 441
sourceFileName= System.IO.Path.GetFileName(filImage.FileName);442
string sourceFileExtension = System.IO.Path.GetExtension(sourceFileName).ToLower();//扩展名 如.jpg443
444
StringCollection sc = new StringCollection();445
foreach( string str in this.FileType.Split(',') )446
sc.Add( "."+str.ToLower() );447
if( !sc.Contains(sourceFileExtension) )448
{449
client.RegisterStartupScript(cstype, "error", "<script language='javascript'>alert('文件格式不对')</script>");450
return;451
}452
453
// 文件大小454
int fileLen = filImage.ContentLength; 455
if( this.FileMaxSize != 0 ) //为0则不限制上传文件大小456
{457
// 判断文件大小458
if(fileLen < 0 || fileLen > this.FileMaxSize * 1024)459
{460
string msg = "文件大小不能超过"+this.FileMaxSize+"K";461
client.RegisterStartupScript(cstype, "error", "<script language='javascript'>alert('" + msg + "')</script>");462
return;463
}464
}465
466
// 读取文件到缓存467
byte[] bufData = new byte[fileLen];468
filImage.InputStream.Read(bufData, 0, fileLen);469
MemoryStream ms = new MemoryStream(bufData);470
if( this.IsRename )471
{472
// 以时间命名文件名,精确到毫秒473
DateTime dtNow = DateTime.Now;474
fileName = dtNow.ToString("yyyyMMddhhmmss")+DateTime.Now.Millisecond.ToString("000")+sourceFileExtension;475
}476
else477
fileName = sourceFileName;478
479
// 文件存放路径文件夹480
string filePath = "";481
if(this.ComputerFilePath == null || this.ComputerFilePath == "" )482
{483
filePath = appPath + this.ComputerUrlPath;484
filePath = filePath.EndsWith(@"/") ? filePath : filePath+"/";485
filePath = filePath.Replace(@"//",@"/");486
filePath = this.Page.Server.MapPath( filePath );487
}488
else489
filePath = this.ComputerFilePath.Replace(@"/",@"\");490
filePath = filePath.EndsWith(@"\") == true ? filePath : filePath + @"\";491
string fileFullPath = filePath + fileName;492
493
//返回文件url全路径，以"/"结尾494
string fileUrlPath = this.ComputerUrlPath.Replace(@"\",@"/");495
fileUrlPath = this.ComputerUrlPath.EndsWith(@"/") == true ? this.ComputerUrlPath : this.ComputerUrlPath + @"/";496
fileUrlPath += fileName;497
498
// 判断存放图片文件的目录是否存在，如果不存在，则创建。499
DirectoryInfo di = new DirectoryInfo(filePath);500
if( di.Attributes == FileAttributes.ReadOnly )501
{502
string msg = "指定文件夹为只读，不能写入文件";503
client.RegisterStartupScript(cstype, "error", "<script language='javascript'>alert('" + msg + "')</script>");504
return;505
}506
if(!Directory.Exists(filePath))507
Directory.CreateDirectory(filePath);508
if( File.Exists( fileFullPath ) && !this.IsOverwrite )509
{510
string msg = "文件已经存在";511
client.RegisterStartupScript(cstype, "error", "<script language='javascript'>alert('" + msg + "')</script>");512
return;513
}514
515
// 把文件写入服务器516
FileStream newFile = new FileStream(fileFullPath,FileMode.Create);517
newFile.Write(bufData,0,fileLen);518
newFile.Flush();519
newFile.Close();520
521
// 注销远程登陆522
if( this.ComputerDomain != "" )523
classValidUser.UndoImpersonation();524
525
//返回文件路径526
this.FileFullUrl = fileUrlPath;527
528
//保存路径信息529
lblMsg.Visible=true;530
lblMsg.Text="上载成功";531
lblInfo.Visible = true;532
double size = (double)fileLen/1024;533
lblInfo.Text = "文件名:"+fileName+" 文件大小:"+size.ToString("0.00")+"K";534
535
//激发用户自定义事件536
if( uploaded != null )537
uploaded(this,new System.EventArgs());538
539
} 540
catch(Exception ex)541
{542
lblMsg.Visible=true;543
lblMsg.Text="上载失败："+ex.Message;544
lblInfo.Visible = false;545
}546
}547
#endregion548
549
}550
}