1
public partial class UpMultiFileControl2 : System.Web.UI.UserControl2
{3
protected void Page_Load(object sender, EventArgs e)4
{5
if (!Page.IsPostBack)6
{7
SaveCurrentPageFileControls();8
}9
}10
protected void btAddFile_Click(object sender, EventArgs e)11
{12
AddOneFileControl();13
}14

15
/// <summary>16
/// 添加一个上传文件控件17
/// </summary>18
private void AddOneFileControl()19
{20
ArrayList al = new ArrayList();21
this.tbFiles.Rows.Clear();22
GetFileControlsFromSession(); 23
HtmlTableRow htr = new HtmlTableRow();24
HtmlTableCell htc = new HtmlTableCell(); 25
htc.Controls.Add(new FileUpload());26
htr.Controls.Add(htc);27
this.tbFiles.Rows.Add(htr);28
SaveCurrentPageFileControls();29
}30

31
/// <summary>32
/// 读取缓存中存储的上传文件控件集33
/// </summary>34
private void GetFileControlsFromSession()35
{36
ArrayList al = new ArrayList(); 37
if (Session["FilesControls"] != null)38
{39
al = (System.Collections.ArrayList)Session["FilesControls"];40
for (int i = 0; i < al.Count; i++)41
{42
HtmlTableRow htr1 = new HtmlTableRow(); 43
HtmlTableCell htc1 = new HtmlTableCell();44
htc1.Controls.Add((System.Web.UI.WebControls.FileUpload)al[i]);45
htr1.Controls.Add(htc1);46
this.tbFiles.Rows.Add(htr1);47
}48
}49
}50
51
/// <summary>52
/// 保存当前页面上传文件控件集到缓存中53
/// </summary> 54
private void SaveCurrentPageFileControls()55
{ 56
ArrayList al = new ArrayList(); 57
foreach (Control controlTR in this.tbFiles.Controls)58
{59
if (controlTR.GetType().ToString() == "System.Web.UI.HtmlControls.HtmlTableRow")60
{61
HtmlTableCell htc = (HtmlTableCell)controlTR.Controls[0];62
foreach (Control controlFileUpload in htc.Controls)63
{64
if (controlFileUpload.GetType().ToString() == "System.Web.UI.WebControls.FileUpload")65
{66
FileUpload tempFileUpload = (FileUpload)controlFileUpload;67
al.Add(tempFileUpload);68
}69
}70
} 71
} 72
Session.Add("FilesControls", al);73
}74

75
protected void btUpFiles_Click(object sender, EventArgs e)76
{77
UpLoadFiles();78
}79

80
/// <summary>81
/// 上传文件操作82
/// </summary>83
private void UpLoadFiles()84
{85
string filepath = Server.MapPath("./")+"UploadFiles";86
87
HttpFileCollection uploadedFiles = Request.Files; 88
for (int i = 0; i < uploadedFiles.Count; i++)89
{ 90
HttpPostedFile userPostedFile = uploadedFiles[i]; 91
try92
{ 93
if (userPostedFile.ContentLength > 0 )94
{ 95
userPostedFile.SaveAs(filepath + "\" + System.IO.Path.GetFileName(userPostedFile.FileName));96
Response.Write("已上传文件: "" + filepath +"\"+ userPostedFile.FileName +""<br><br>" ); 97
} 98
} 99
catch100
{101
Response.Write("上传文件: "" + userPostedFile.FileName +""出错!");102
} 103
}104
if (Session["FilesControls"] != null)105
{106
Session.Remove("FilesControls");107
}108
} 109
}---------------
二、改变上传文件大小和时间限制
<httpRuntime>
executionTimeout="110" //上传等待时间
maxRequestLength="4096" //上传文件大小,默认为4M
</httpRuntime>
上传文件大小是由上面两个参数所决定的. 涉及到安全因素,不要设得太大.

