fileUpload.ascx代码:
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="fileUpload.ascx.cs" Inherits="fileUpload" %> <style type="text/css"> .style3 { width: 196px; } .style4 { width: 507px; height: 269px; } .style5 { width: 82%; } .style6 { height: 180px; } .style7 { width: 102px; text-align: right; } </style> <table align="left" cellpadding="0" cellspacing="0" class="style4" style="background-image: url('upload.JPG')"> <tr> <td valign="top"> <table align="center" cellpadding="0" cellspacing="0" class="style5" style="font-size: small"> <tr> <td class="style6" colspan="3"> </td> </tr> <tr> <td class="style7"> 选择文件：</td> <td class="style3"> <asp:FileUpload ID="FileUpload1" runat="server" /> </td> <td style="text-align: left"> <asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/WebControlUpload/shangchuan.JPG" onclick="ImageButton1_Click" /> </td> </tr> <tr> <td colspan="3"> </td> </tr> </table> </td> </tr> </table>
fileUpload.ascx.cs代码:
public partial class fileUpload : System.Web.UI.UserControl { protected void Page_Load(object sender, EventArgs e) { } protected void ImageButton1_Click(object sender, ImageClickEventArgs e) { string serverPath = Server.MapPath("UpLoad"); //获取服务器端目录绝对路径 if (!System.IO.Directory.Exists(serverPath)) //如果不存在该目录 { System.IO.Directory.CreateDirectory(serverPath); //创建该目录 } if (FileUpload1.HasFile) //判断是否选择上传的文件 { string imgtype = FileUpload1.PostedFile.ContentType;//获取客户端发送的文件类型 imgtype = imgtype.Substring(0, 5); if (imgtype != "image") { Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('请选择图片');", true); } else { int filesize = FileUpload1.PostedFile.ContentLength / 1024 / 1024;//获取上传文件的大小 if (filesize > 8) //如果大于8M { Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('只允许上传不大于8兆的文件');", true); //弹出提示信息 return; } else //否则 { //使用SaveAs方法将上传的文件存储到服务器中 FileUpload1.SaveAs(serverPath + "\" + FileUpload1.FileName); Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('上传成功');", true); } } } else //如果没有选择文件 { //弹出提示信息 Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('请选择文件');", true); return; } } }
Default.aspx代码:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <%@ Register src="fileUpload.ascx" tagname="fileUpload" tagprefix="uc1" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>具有文件上传功能的用户控件</title> <style type="text/css"> #form1 { width: 639px; height: 152px; text-align: right; } </style> </head> <body> <form id="form1" runat="server"> <uc1:fileUpload ID="fileUpload1" runat="server" /> </form> </body> </html>
最终效果图:
