学习, And 整理了一下.
(一). 示例图片
(二). 示例代码
1
public partial class UpMultiFileControl2 : System.Web.UI.UserControl
2
{
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
try
92
{
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
catch
100
{
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
}
(三). 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.
免责声明：本文为网络用户发布，其观点仅代表作者个人观点，与本站无关，本站仅提供信息存储服务。文中陈述内容未经本站证实，其真实性、完整性、及时性本站不作任何保证或承诺，请读者仅作参考，并请自行核实相关内容。
