asp.net中文件的上传和下载 http://blog.csdn.net/jxufewbt/archive/2006/04/21/671406.aspx 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 http://dotnet.aspx.cc/article/58ea3515-36f2-4fd9-ac89-eaf49f59816c/read.aspx http://community.csdn.net/Expert/topic/5341/5341805.xml?temp=.752331其中回帖和发布新贴中提交图片就是一个很好的例子,只要去掉文件格式的限制代码就可以了 刚刚完成了,给你代码页面代码:<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML> <HEAD> <title>Upload</title> <meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.0"> <meta name="CODE_LANGUAGE" content="Visual Basic 7.0"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> <script language="javascript"> function addFiles(oContainer) { var sLineHTML="<div><input type='file' name='files' style='width:300'><input type='button' onclick='javascript:delFileInput(this)' value='删除'></div>"; oContainer.insertAdjacentHTML('beforeEnd',sLineHTML); } function delFileInput(oInputButton) { var divToDel=oInputButton.parentNode; divToDel.parentNode.removeChild(divToDel); } </script> </HEAD> <body MS_POSITIONING="GridLayout"> <form id="Form1" method="post" runat="server" encType="multipart/form-data"> <table align="center"> <tr> <td align="center"><h1> <asp:label id="Title" Runat="server"></asp:label></h1> </td> </tr> <tr> <td id="TD"> <INPUT style="WIDTH: 300px" type="file" name="Files"> </td> </tr> <tr> <td> <asp:label id="strStatus" runat="server" BorderColor="White" BorderStyle="None" Font-Size="9pt" Font-Bold="True" Font-Names="宋体" Width="500px"></asp:label> </td> </tr> <tr> <td align="center"> <BUTTON style="WIDTH: 79px; HEIGHT: 20px" onclick="javascript:addFiles(TD);" type="button"> 继续添加</BUTTON> <asp:Button ID="btnUpLoad" Runat="server" Text=" 上 传 " EnableViewState="False" CausesValidation="true"></asp:Button> <asp:Button id="Button1" Runat="server" CausesValidation="true" EnableViewState="False" Text="上传保存到数据库"></asp:Button> </td> </tr> <TR> <TD align="center"> <asp:DataGrid id="DataGrid1" runat="server" Width="100%" AutoGenerateColumns="False" ShowHeader="False" GridLines="None"> <Columns> <asp:HyperLinkColumn DataNavigateUrlField="url" DataTextField="file_name"></asp:HyperLinkColumn> <asp:ButtonColumn Text="删除" CommandName="Delete"> <ItemStyle Wrap="False"></ItemStyle> </asp:ButtonColumn> </Columns> </asp:DataGrid></TD> </TR> </table> </form> </body></HTML> 后台代码using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Drawing;using System.Web;using System.Web.SessionState;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;using System.IO;namespace pmsx.WebPrint{ /// <summary> /// file 的摘要说明。 /// </summary> public class file : System.Web.UI.Page { protected System.Web.UI.WebControls.Label strStatus; protected System.Web.UI.WebControls.Label Title; protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.WebControls.Button btnUpLoad; protected System.Web.UI.WebControls.DataGrid DataGrid1; public string pid; private void Page_Load(object sender, System.EventArgs e) { // 在此处放置用户代码以初始化页面 Title.Text = "<h3>多文件上传</h3>"; pid="DJS2007001"; if(!IsPostBack) GridBind(pid); } public void GridBind(string id) { string sql="select *,'../aspx/xmfjxz.aspx?file=../upfile/'+phy_file_name as url from t_add_file where pro_id='"+ id +"'"; DataSet ds=csqlcon.getdataset(sql); this.DataGrid1.DataSource=ds.Tables[0]; DataGrid1.DataKeyField="id"; DataGrid1.DataBind(); } #region Web 窗体设计器生成的代码 override protected void OnInit(EventArgs e) { // // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。 // InitializeComponent(); base.OnInit(e); } /// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void InitializeComponent() { this.btnUpLoad.Click += new System.EventHandler(this.btnUpLoad_Click); this.Button1.Click += new System.EventHandler(this.Button1_Click); this.DataGrid1.ItemCreated += new System.Web.UI.WebControls.DataGridItemEventHandler(this.DataGrid1_ItemCreated); this.DataGrid1.DeleteCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_DeleteCommand); this.Load += new System.EventHandler(this.Page_Load); } #endregion /// <summary> /// 上传附件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnUpLoad_Click(object sender, System.EventArgs e) { System.Web.HttpFileCollection files = System.Web.HttpContext.Current.Request.Files; System.Text.StringBuilder strMsg = new System.Text.StringBuilder("上传的文件信息分别为:<hr color=red>"); int fileCount; int filecount = files.Count; try { for(fileCount = 0;fileCount<files.Count;fileCount++) { //定义访问客户端上传文件的对象 System.Web.HttpPostedFile postedFile = files[fileCount]; string fileName, fileExtension; //取得上传得文件名,文件名加入时分秒// fileName = System.IO.Path.GetFileName(postedFile.FileName); fileName=Path.GetFileNameWithoutExtension(postedFile.FileName)+DateTime.Now.ToString("yyyyMMddssffmm")+Path.GetExtension(postedFile.FileName); if(fileName != String.Empty) { //取得文件的扩展名 fileExtension = System.IO.Path.GetExtension(fileName); //上传的文件信息 strMsg.Append("上传的文件类型:" + postedFile.ContentType.ToString() + "<br>"); strMsg.Append("客户端文件地址:" + postedFile.FileName + "<br>"); strMsg.Append("上传文件的文件名:" + fileName + "<br>"); strMsg.Append("上传文件的扩展名:" + fileExtension + "<br><hr color=red>"); //保存到指定的文件夹 postedFile.SaveAs(Server.MapPath("../upfile/") + fileName); } } strStatus.Text = strMsg.ToString(); GridBind(pid); } catch(System.Exception error) { strStatus.Text = error.Message; } } /// <summary> /// 上传附件并保存数据库 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Button1_Click(object sender, System.EventArgs e) { System.Web.HttpFileCollection files = System.Web.HttpContext.Current.Request.Files; System.Text.StringBuilder strMsg = new System.Text.StringBuilder("上传的文件信息分别为:<hr color=red>"); int fileCount; int filecount = files.Count; try { for(fileCount = 0;fileCount<files.Count;fileCount++) { //定义访问客户端上传文件的对象 System.Web.HttpPostedFile postedFile = files[fileCount]; string fileName, fileExtension; //取得上传得文件名,文件名加入时分秒 string fileNameExc = System.IO.Path.GetFileName(postedFile.FileName); fileName=Path.GetFileNameWithoutExtension(postedFile.FileName)+DateTime.Now.ToString("yyyyMMddssffmm")+Path.GetExtension(postedFile.FileName); if(fileName != String.Empty) { //取得文件的扩展名 fileExtension = System.IO.Path.GetExtension(fileName); //上传的文件信息 strMsg.Append("上传的文件类型:" + postedFile.ContentType.ToString() + "<br>"); strMsg.Append("客户端文件地址:" + postedFile.FileName + "<br>"); strMsg.Append("上传文件的文件名:" + fileName + "<br>"); strMsg.Append("上传文件的扩展名:" + fileExtension + "<br><hr color=red>"); //保存到指定的文件夹 postedFile.SaveAs(Server.MapPath("../upfile/") + fileName); } string sql="insert into t_add_file (PRO_ID,FILE_NAME,PHY_FILE_NAME)VALUES('"+pid+"','"+fileNameExc+"','"+fileName+"')"; csqlcon.executesql(sql); } strStatus.Text = strMsg.ToString(); GridBind(pid); } catch(System.Exception error) { strStatus.Text = error.Message; } } private void DataGrid1_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e) { string sql = "Delete From t_add_file Where id="+this.DataGrid1.DataKeys[e.Item.ItemIndex].ToString(); try { //删除数据 DataSet ds=csqlcon.getdataset("select * from t_add_file where id="+this.DataGrid1.DataKeys[e.Item.ItemIndex].ToString()); string pfname=ds.Tables[0].Rows[0]["phy_file_name"].ToString(); string url=Server.MapPath("../upfile/")+ pfname; if (System.IO.File.Exists(url) ) { System.IO.File.Delete(Server.MapPath("../upfile/") + pfname); } csqlcon.executesql(sql); } catch { strStatus.Text="删除失败!"; } GridBind(pid); } private void DataGrid1_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e) { if(e.Item.ItemType==ListItemType.Item || e.Item.ItemType==ListItemType.AlternatingItem) { LinkButton link = (LinkButton)e.Item.Cells[1].Controls[0]; link.Attributes.Add("onclick","javascript:return window.confirm('是否要删除此附件?');"); } } }} 这里的数据库建表要哪些自段啊,还是只要1个pid就行了? 可以使用ftpwebrequest类来做.不过,如果程序运行在服务器上,下载时,也会下载到服务器上.上传时,如果程序运行在服务器上,下载的路径将会是服务器的路径,并非客户机的本地路径.所以,这个类比较适应于做上传程序运行在本地,文件上传到远程的环境. 哈哈,真是详细,LOOV266(神游太虚) .net中上传文件,最主要不就是这么一句吗?htmlInputFile1.PostedFile.SaveAs(@"c:\abc\fileName.ext"); '@top' 附近有语法错误。 图片显示问题 <img>标记的问题 请问我这段sql语句如何排序加order by 请高手帮忙 一个Ajaxpro 图片上传预览的问题上 一frame,加上runat="server"后,如何在后台控制 请教有关使用Visio的问题 如何引用excel命名空间? 如何在DropDownList的下拉选项的前面显示空格 希望有人可以回答:为什么WEB控件不可以成功而HTML控件却成功了! AjaxPro 配合 Repeater 实现无刷新的问题 在线等~~~~ repeater里面FindControl成功,,但设置控件属性失败,这个是什么原因呢?谢谢
页面代码:<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>Upload</title>
<meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.0">
<meta name="CODE_LANGUAGE" content="Visual Basic 7.0">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
<script language="javascript">
function addFiles(oContainer)
{
var sLineHTML="<div><input type='file' name='files' style='width:300'><input type='button' onclick='javascript:delFileInput(this)' value='删除'></div>";
oContainer.insertAdjacentHTML('beforeEnd',sLineHTML);
}
function delFileInput(oInputButton)
{
var divToDel=oInputButton.parentNode;
divToDel.parentNode.removeChild(divToDel);
}
</script>
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server" encType="multipart/form-data">
<table align="center">
<tr>
<td align="center"><h1>
<asp:label id="Title" Runat="server"></asp:label></h1>
</td>
</tr>
<tr>
<td id="TD">
<INPUT style="WIDTH: 300px" type="file" name="Files">
</td>
</tr>
<tr>
<td>
<asp:label id="strStatus" runat="server" BorderColor="White" BorderStyle="None" Font-Size="9pt"
Font-Bold="True" Font-Names="宋体" Width="500px"></asp:label>
</td>
</tr>
<tr>
<td align="center">
<BUTTON style="WIDTH: 79px; HEIGHT: 20px" onclick="javascript:addFiles(TD);" type="button">
继续添加</BUTTON>
<asp:Button ID="btnUpLoad" Runat="server" Text=" 上 传 " EnableViewState="False" CausesValidation="true"></asp:Button>
<asp:Button id="Button1" Runat="server" CausesValidation="true" EnableViewState="False" Text="上传保存到数据库"></asp:Button>
</td>
</tr>
<TR>
<TD align="center">
<asp:DataGrid id="DataGrid1" runat="server" Width="100%" AutoGenerateColumns="False" ShowHeader="False"
GridLines="None">
<Columns>
<asp:HyperLinkColumn DataNavigateUrlField="url" DataTextField="file_name"></asp:HyperLinkColumn>
<asp:ButtonColumn Text="删除" CommandName="Delete">
<ItemStyle Wrap="False"></ItemStyle>
</asp:ButtonColumn>
</Columns>
</asp:DataGrid></TD>
</TR>
</table>
</form>
</body>
</HTML>
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.IO;
namespace pmsx.WebPrint
{
/// <summary>
/// file 的摘要说明。
/// </summary>
public class file : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label strStatus;
protected System.Web.UI.WebControls.Label Title;
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.Button btnUpLoad;
protected System.Web.UI.WebControls.DataGrid DataGrid1;
public string pid;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
Title.Text = "<h3>多文件上传</h3>";
pid="DJS2007001";
if(!IsPostBack)
GridBind(pid);
}
public void GridBind(string id)
{
string sql="select *,'../aspx/xmfjxz.aspx?file=../upfile/'+phy_file_name as url from t_add_file where pro_id='"+ id +"'";
DataSet ds=csqlcon.getdataset(sql);
this.DataGrid1.DataSource=ds.Tables[0];
DataGrid1.DataKeyField="id";
DataGrid1.DataBind();
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.btnUpLoad.Click += new System.EventHandler(this.btnUpLoad_Click);
this.Button1.Click += new System.EventHandler(this.Button1_Click);
this.DataGrid1.ItemCreated += new System.Web.UI.WebControls.DataGridItemEventHandler(this.DataGrid1_ItemCreated);
this.DataGrid1.DeleteCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_DeleteCommand);
this.Load += new System.EventHandler(this.Page_Load); }
#endregion
/// <summary>
/// 上传附件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnUpLoad_Click(object sender, System.EventArgs e)
{
System.Web.HttpFileCollection files = System.Web.HttpContext.Current.Request.Files;
System.Text.StringBuilder strMsg = new System.Text.StringBuilder("上传的文件信息分别为:<hr color=red>");
int fileCount;
int filecount = files.Count;
try
{
for(fileCount = 0;fileCount<files.Count;fileCount++)
{
//定义访问客户端上传文件的对象
System.Web.HttpPostedFile postedFile = files[fileCount];
string fileName, fileExtension;
//取得上传得文件名,文件名加入时分秒
// fileName = System.IO.Path.GetFileName(postedFile.FileName);
fileName=Path.GetFileNameWithoutExtension(postedFile.FileName)+DateTime.Now.ToString("yyyyMMddssffmm")+Path.GetExtension(postedFile.FileName);
if(fileName != String.Empty)
{
//取得文件的扩展名
fileExtension = System.IO.Path.GetExtension(fileName);
//上传的文件信息
strMsg.Append("上传的文件类型:" + postedFile.ContentType.ToString() + "<br>");
strMsg.Append("客户端文件地址:" + postedFile.FileName + "<br>");
strMsg.Append("上传文件的文件名:" + fileName + "<br>");
strMsg.Append("上传文件的扩展名:" + fileExtension + "<br><hr color=red>");
//保存到指定的文件夹
postedFile.SaveAs(Server.MapPath("../upfile/") + fileName);
}
}
strStatus.Text = strMsg.ToString();
GridBind(pid);
}
catch(System.Exception error)
{
strStatus.Text = error.Message;
}
}
/// <summary>
/// 上传附件并保存数据库
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Button1_Click(object sender, System.EventArgs e)
{
System.Web.HttpFileCollection files = System.Web.HttpContext.Current.Request.Files;
System.Text.StringBuilder strMsg = new System.Text.StringBuilder("上传的文件信息分别为:<hr color=red>");
int fileCount;
int filecount = files.Count;
try
{
for(fileCount = 0;fileCount<files.Count;fileCount++)
{
//定义访问客户端上传文件的对象
System.Web.HttpPostedFile postedFile = files[fileCount];
string fileName, fileExtension;
//取得上传得文件名,文件名加入时分秒
string fileNameExc = System.IO.Path.GetFileName(postedFile.FileName);
fileName=Path.GetFileNameWithoutExtension(postedFile.FileName)+DateTime.Now.ToString("yyyyMMddssffmm")+Path.GetExtension(postedFile.FileName);
if(fileName != String.Empty)
{
//取得文件的扩展名
fileExtension = System.IO.Path.GetExtension(fileName);
//上传的文件信息
strMsg.Append("上传的文件类型:" + postedFile.ContentType.ToString() + "<br>");
strMsg.Append("客户端文件地址:" + postedFile.FileName + "<br>");
strMsg.Append("上传文件的文件名:" + fileName + "<br>");
strMsg.Append("上传文件的扩展名:" + fileExtension + "<br><hr color=red>");
//保存到指定的文件夹
postedFile.SaveAs(Server.MapPath("../upfile/") + fileName);
}
string sql="insert into t_add_file (PRO_ID,FILE_NAME,PHY_FILE_NAME)VALUES('"+pid+"','"+fileNameExc+"','"+fileName+"')";
csqlcon.executesql(sql);
}
strStatus.Text = strMsg.ToString();
GridBind(pid);
}
catch(System.Exception error)
{
strStatus.Text = error.Message;
}
} private void DataGrid1_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
string sql = "Delete From t_add_file Where id="+this.DataGrid1.DataKeys[e.Item.ItemIndex].ToString(); try
{
//删除数据
DataSet ds=csqlcon.getdataset("select * from t_add_file where id="+this.DataGrid1.DataKeys[e.Item.ItemIndex].ToString());
string pfname=ds.Tables[0].Rows[0]["phy_file_name"].ToString();
string url=Server.MapPath("../upfile/")+ pfname;
if (System.IO.File.Exists(url) )
{
System.IO.File.Delete(Server.MapPath("../upfile/") + pfname);
}
csqlcon.executesql(sql);
}
catch
{
strStatus.Text="删除失败!";
}
GridBind(pid);
} private void DataGrid1_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
if(e.Item.ItemType==ListItemType.Item || e.Item.ItemType==ListItemType.AlternatingItem)
{
LinkButton link = (LinkButton)e.Item.Cells[1].Controls[0];
link.Attributes.Add("onclick","javascript:return window.confirm('是否要删除此附件?');");
}
} }
}
不过,如果程序运行在服务器上,下载时,也会下载到服务器上.
上传时,如果程序运行在服务器上,下载的路径将会是服务器的路径,并非客户机的本地路径.所以,这个类比较适应于做上传程序运行在本地,文件上传到远程的环境.