Asp.net 2.0 用 FileUpload 控件实现多文件上传 用户控件(示例代码下载).NET技术
Posted on 2006-08-24 00:49 桦林 阅读(5018) 评论(5) 收藏 举报
一、示例代码
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public partial class UpMultiFileControl2 : System.Web.UI.UserControl
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{
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protected void Page_Load(object sender, EventArgs e)
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{
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if (!Page.IsPostBack)
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{
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SaveCurrentPageFileControls();
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}
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}
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protected void btAddFile_Click(object sender, EventArgs e)
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{
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AddOneFileControl();
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}
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/// <summary>
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/// 添加一个上传文件控件
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/// </summary>
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private void AddOneFileControl()
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{
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ArrayList al = new ArrayList();
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this.tbFiles.Rows.Clear();
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GetFileControlsFromSession();
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HtmlTableRow htr = new HtmlTableRow();
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HtmlTableCell htc = new HtmlTableCell();
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htc.Controls.Add(new FileUpload());
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htr.Controls.Add(htc);
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this.tbFiles.Rows.Add(htr);
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SaveCurrentPageFileControls();
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}
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/// <summary>
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/// 读取缓存中存储的上传文件控件集
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/// </summary>
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private void GetFileControlsFromSession()
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{
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ArrayList al = new ArrayList();
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if (Session["FilesControls"] != null)
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{
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al = (System.Collections.ArrayList)Session["FilesControls"];
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for (int i = 0; i < al.Count; i++)
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{
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HtmlTableRow htr1 = new HtmlTableRow();
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HtmlTableCell htc1 = new HtmlTableCell();
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htc1.Controls.Add((System.Web.UI.WebControls.FileUpload)al[i]);
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htr1.Controls.Add(htc1);
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this.tbFiles.Rows.Add(htr1);
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}
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}
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}
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/// <summary>
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/// 保存当前页面上传文件控件集到缓存中
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/// </summary>
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private void SaveCurrentPageFileControls()
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{
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ArrayList al = new ArrayList();
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foreach (Control controlTR in this.tbFiles.Controls)
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{
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if (controlTR.GetType().ToString() == "System.Web.UI.HtmlControls.HtmlTableRow")
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{
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HtmlTableCell htc = (HtmlTableCell)controlTR.Controls[0];
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foreach (Control controlFileUpload in htc.Controls)
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{
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if (controlFileUpload.GetType().ToString() == "System.Web.UI.WebControls.FileUpload")
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{
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FileUpload tempFileUpload = (FileUpload)controlFileUpload;
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al.Add(tempFileUpload);
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}
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}
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}
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}
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Session.Add("FilesControls", al);
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}
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protected void btUpFiles_Click(object sender, EventArgs e)
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{
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UpLoadFiles();
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}
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/// <summary>
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/// 上传文件操作
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/// </summary>
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private void UpLoadFiles()
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{
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string filepath = Server.MapPath("./")+"UploadFiles";
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HttpFileCollection uploadedFiles = Request.Files;
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for (int i = 0; i < uploadedFiles.Count; i++)
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{
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HttpPostedFile userPostedFile = uploadedFiles[i];
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try
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{
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if (userPostedFile.ContentLength > 0 )
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{
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userPostedFile.SaveAs(filepath + "\" + System.IO.Path.GetFileName(userPostedFile.FileName));
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Response.Write("已上传文件: "" + filepath +"\"+ userPostedFile.FileName +""<br><br>" );
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}
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}
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catch
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{
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Response.Write("上传文件: "" + userPostedFile.FileName +""出错!");
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}
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}
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if (Session["FilesControls"] != null)
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{
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Session.Remove("FilesControls");
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}
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}
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}
---------------
二、改变上传文件大小和时间限制
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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

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/// <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

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/// <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
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/// <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

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

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/// <summary>81
/// 上传文件操作82
/// </summary>83
private void UpLoadFiles()84
{85
string filepath = Server.MapPath("./")+"UploadFiles";86
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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.


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