单个文件上传,并在客户端验证文件的格式
前台代码:
1
using System;
2using System.Data;
3using System.Configuration;
4using System.Collections;
5using System.Web;
6using System.Web.Security;
7using System.Web.UI;
8using System.Web.UI.WebControls;
9using System.Web.UI.WebControls.WebParts;
10using System.Web.UI.HtmlControls;
11
12
13
/// <summary>
14
/// 功能:单个文件上传,并使用JavaScript在前端验证,
15///
16/// 上传文件的格式;
17///
18/// 时间:二00八年一月二十三日
19///
20/// 作者:曹代明
21///
22
/// </summary>
23public partial class Jun_UpdateFile : System.Web.UI.Page
24{
25 protected void Page_Load(object sender, EventArgs e)
26
{
27
28
}
29 protected void Button1_Click(object sender, EventArgs e)
30 {
31 string FileName = this.FileUpload1.FileName.Trim().ToString();
32 this.UpdateFile(FileName);
33 this.Button1.Text = "单个文件上传成功";
34 }
35
36
公共方法
54
55}
56
using System;2
using System.Data;3
using System.Configuration;4
using System.Collections;5
using System.Web;6
using System.Web.Security;7
using System.Web.UI;8
using System.Web.UI.WebControls;9
using System.Web.UI.WebControls.WebParts;10
using System.Web.UI.HtmlControls;11
12
13
/// <summary>
14
/// 功能:单个文件上传,并使用JavaScript在前端验证,15
/// 16
/// 上传文件的格式;17
/// 18
/// 时间:二00八年一月二十三日19
/// 20
/// 作者:曹代明21
/// 22
/// </summary>23
public partial class Jun_UpdateFile : System.Web.UI.Page24
{
25
protected void Page_Load(object sender, EventArgs e)26
{27
28
}29
protected void Button1_Click(object sender, EventArgs e)30
{31
string FileName = this.FileUpload1.FileName.Trim().ToString();32
this.UpdateFile(FileName);33
this.Button1.Text = "单个文件上传成功";34
}35
36
公共方法54
55
}56
后台代码:
1<%@ Page Language="C#" AutoEventWireup="true" CodeFile="UpdateFile.aspx.cs" Inherits="Jun_UpdateFile" %>
2
3<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
4
5<html xmlns="http://www.w3.org/1999/xhtml" >
6
7<head runat="server">
8<script language="javascript" type="text/javascript">
9 function Check_FileType()
10{
11
12 var str=document.getElementById("FileUpload1").value;
13 var pos = str.lastIndexOf(".");
14 var lastname = str.substring(pos,str.length)
15 if (lastname.toLowerCase()!=".jpg" && lastname.toLowerCase()!=".gif")
16 {
17 alert("您上传的文件类型为"+lastname+"，图片必须为.jpg,.gif类型");
18 return false;
19 }
20 else
21 {
22 return true;
23 }
24}
25
26</script>
27 <title>无标题页</title>
28</head>
29
30<body>
31 <form id="form1" runat="server">
32 <div>
33
34 <asp:FileUpload ID="FileUpload1" runat="server" />
35 <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="单个文件上传" OnClientClick="return Check_FileType()" /></div>
36 </form>
37</body>
38</html>
39
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="UpdateFile.aspx.cs" Inherits="Jun_UpdateFile" %>2
3
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">4
5
<html xmlns="http://www.w3.org/1999/xhtml" >6
7
<head runat="server">8
<script language="javascript" type="text/javascript">9
function Check_FileType()10
{11
12
var str=document.getElementById("FileUpload1").value;13
var pos = str.lastIndexOf(".");14
var lastname = str.substring(pos,str.length) 15
if (lastname.toLowerCase()!=".jpg" && lastname.toLowerCase()!=".gif")16
{17
alert("您上传的文件类型为"+lastname+"，图片必须为.jpg,.gif类型");18
return false;19
}20
else21
{22
return true;23
}24
}25
26
</script>27
<title>无标题页</title>28
</head>29
30
<body>31
<form id="form1" runat="server">32
<div>33
34
<asp:FileUpload ID="FileUpload1" runat="server" />35
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="单个文件上传" OnClientClick="return Check_FileType()" /></div>36
</form>37
</body>38
</html>39
