用 FileUpload 控件实现多文件上传代码,Asp.Net代码库,德仔网

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【Asp.Net】用 FileUpload 控件实现多文件上传
作者:Dezai.CN / 发布于2011/5/3/ 659
<div>public partial class UpMultiFileControl2 : System.Web.UI.UserControl
{
 protected void Page_Load(object sender, EventArgs e)
 {
 if (!Page.IsPostBack)
 {
 SaveCurrentPageFileControls();
 }
 }
 protected void btAddFile_Click(object sender, EventArgs e)
 {
 AddOneFileControl();
 }
<div> /**//// 〈summary〉
 /// 添加一个上传文件控件
 /// 〈/summary〉
 private void AddOneFileControl()
 {
 ArrayList al = new ArrayList();
 this.tbFiles.Rows.Clear();
 GetFileControlsFromSession();
 HtmlTableRow htr = new HtmlTableRow();
 HtmlTableCell htc = new HtmlTableCell();
 htc.Controls.Add(new FileUpload());
 htr.Controls.Add(htc);
 this.tbFiles.Rows.Add(htr);
 SaveCurrentPageFileControls();
 }
<div> /**//// 〈summary〉
 /// 读取缓存中存储的上传文件控件集
 /// 〈/summary〉
 private void GetFileControlsFromSession()
 {
 ArrayList al = new ArrayList();
 if (Session[&ldquo;FilesControls&ldquo;] != null)
 {
 al = (System.Collections.ArrayList)Session[&ldquo;FilesControls&ldquo;];
 for (int i = 0; i 〈 al.Count; i++)
 {
 HtmlTableRow htr1 = new HtmlTableRow();
 HtmlTableCell htc1 = new HtmlTableCell();
 htc1.Controls.Add((System.Web.UI.WebControls.FileUpload)al[i]);
 htr1.Controls.Add(htc1);
 this.tbFiles.Rows.Add(htr1);
 }
 }
 }
<div> /**//// 〈summary〉
 /// 保存当前页面上传文件控件集到缓存中
 /// 〈/summary〉
 private void SaveCurrentPageFileControls()
 {
 ArrayList al = new ArrayList();
 foreach (Control controlTR in this.tbFiles.Controls)
 {
 if (controlTR.GetType().ToString() == &ldquo;System.Web.UI.HtmlControls.HtmlTableRow&ldquo;)
 {
 HtmlTableCell htc = (HtmlTableCell)controlTR.Controls[0];
 foreach (Control controlFileUpload in htc.Controls)
 {
 if (controlFileUpload.GetType().ToString() == &ldquo;System.Web.UI.WebControls.FileUpload&ldquo;)
 {
 FileUpload tempFileUpload = (FileUpload)controlFileUpload;
 al.Add(tempFileUpload);
 }
 }
 }
 }
 Session.Add(&ldquo;FilesControls&ldquo;, al);
 }
<div> protected void btUpFiles_Click(object sender, EventArgs e)
 {
 UpLoadFiles();
 }
<div> /**//// 〈summary〉
 /// 上传文件操作
 /// 〈/summary〉
 private void UpLoadFiles()
 {
 string filepath = Server.MapPath(&ldquo;./&ldquo;)+&ldquo;UploadFiles&ldquo;;</div>
<div> HttpFileCollection uploadedFiles = Request.Files;
 for (int i = 0; i 〈 uploadedFiles.Count; i++)
 {
 HttpPostedFile userPostedFile = uploadedFiles[i];
 try
 {
 if (userPostedFile.ContentLength 〉 0 )
 {
 userPostedFile.SaveAs(filepath + &ldquo;\\&ldquo; + System.IO.Path.GetFileName(userPostedFile.FileName));
 Response.Write(&ldquo;已上传文件: \&ldquo;&ldquo; + filepath +&ldquo;\\&ldquo;+ userPostedFile.FileName +&ldquo;\&ldquo;〈br〉〈br〉&ldquo; );
 }
 }
 catch
 {
 Response.Write(&ldquo;上传文件: \&ldquo;&ldquo; + userPostedFile.FileName +&ldquo;\&ldquo;出错!&ldquo;);
 }
 }
 if (Session[&ldquo;FilesControls&ldquo;] != null)
 {
 Session.Remove(&ldquo;FilesControls&ldquo;);
 }
 }
}
<div>(三). 改变上传文件大小和时间限制</div>
<div> 〈httpRuntime〉
 executionTimeout=&ldquo;110&ldquo; //上传等待时间
 maxRequestLength=&ldquo;4096&ldquo; //上传文件大小,默认为4M
 〈/httpRuntime〉</div>
<div> 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。 
</div>
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　多文件上传　
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