1
<HTML>
2 <HEAD>
3 <title>UpLoad</title>
4 <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
5 <meta name="CODE_LANGUAGE" Content="C#">
6 <meta name="vs_defaultClientScript" content="JavaScript">
7 <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
8 <base target="_self">
9
<style type="text/css">
10
#myImg
11
{
12 filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale);
13
}
14
</style>
15 <script language="javascript">
16
17 function viewfile()
18 {
19 //document.getElementById("myImg").src=document.getElementById("File1").value;
20 document.getElementById("myImg").filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = document.getElementById("File1").value;
21 }
22
23 </script>
24 </HEAD>
25 <body>
26 <form id="Form1" method="post" runat="server">
27 <TABLE id="Table1" cellSpacing="1" cellPadding="1" width="300" border="0">
28 <TR>
29 <TD align="center" height="25">
30 <asp:Image id="Image1" runat="server" ImageUrl="Images/load2.gif"></asp:Image>
31 </TD>
32 </TR>
33 <TR>
34 <TD align="center"><img width="80" height="80" alt="图标" id="myImg" >
35 </TD>
36 </TR>
37 <TR>
38 <TD align="center"><INPUT id="File1" type="file" name="File1" runat="server" onpropertychange="viewfile();"></TD>
39 </TR>
40 <TR>
41 <TD align="center">
42 <asp:Button id="btnUpLoad" runat="server" Text="上传" CssClass="ckpUp"></asp:Button></TD>
43 </TR>
44 </TABLE>
45 </form>
46 </body>
47</HTML>
后台代码：
1using System;
2using System.Collections;
3using System.ComponentModel;
4using System.Data;
5using System.Drawing;
6using System.Web;
7using System.Text;
8using System.Web.SessionState;
9using System.Web.UI;
10using System.Web.UI.WebControls;
11using System.Web.UI.HtmlControls;
12using System.IO;//引用File类时用到
13
14namespace aaaaaaaaaaaaa
15{
16 /// <summary>
17 /// UpLoad 的摘要说明。
18 /// </summary>
19 public class UpLoad : System.Web.UI.Page
20 {
21 protected System.Web.UI.WebControls.Image Image1;
22 protected System.Web.UI.WebControls.Button btnUpLoad;
23 protected System.Web.UI.HtmlControls.HtmlInputFile File1;
24
25 private void Page_Load(object sender, System.EventArgs e)
26 {
27 // 在此处放置用户代码以初始化页面
28
29 if(!IsPostBack)
30 {
31 this.Image1.Visible=false;
32 }
33
34 }
35
36 //关闭并刷新父窗口
37 public static void CloseWin(string url)
38 {
39 StringBuilder str = new StringBuilder();
40 str.Append("<script language=javascript>");
41 str.Append("var e = (window.parent.opener == undefined) ? dialogArguments : window.parent.opener.document;");
42 str.Append("e.location='" + url + "';");
43 str.Append("window.close();");
44 str.Append("</script>");
45
46 HttpContext.Current.Response.Write(str.ToString());
47 }
48
49
Web 窗体设计器生成的代码
70
71 private void btnUpLoad_Click(object sender, System.EventArgs e)
72 {
73 string Sourcefile = this.File1.Value;
74 if(Sourcefile=="")
75 {
76 Response.Write("<script>alert('请选择图片文件')</script>");
77 }
78 else
79 {
80 string fileExtName = Sourcefile.Substring(Sourcefile.LastIndexOf(".")+1,3);//取扩展名
81
82 if(fileExtName.ToLower() !="jpg" )//本程序暂用jpg格式
83 {
84 Response.Write("请选择格式为jpg的图片文件");
85 }
86 else
87 {
88 string ImgServerPath = Server.MapPath(".")+"/Images/UpLoad/";
89 string ImgServerName = "lib_"+Request.QueryString["ID"]+"."+fileExtName.ToLower();
90
91 if (Request.Files.Count > 0)
92 {
93 if (Request.Files[0].FileName!="")
94 {
95 string ServerFullPath=ImgServerPath+ImgServerName;
96
97 try
98 {
99
100 this.Image1.Visible=true;
101 //删除原有图像
102 File.Delete(ImgServerPath+"lib_"+Request.QueryString["ID"]+".jpg");
103
104 Request.Files[0].SaveAs(ServerFullPath);
105 }
106 catch(System.Exception ex)
107 {
108 Response.Write("<script>alert('上传失败,文件不存在或权限不能访问!');</script>");
109 return;
110 }
111 this.Image1.Visible=false;
112
113 CloseWin("aaaa.aspx?id="+Request.QueryString["ID"].ToString());
114 }
115 }
116 }
117 }
118 }
119 }
120}
121
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