繁體中文当前位置: 首页 > 图文教程 > 网络编程 > ASP.NET > ASP.NET FileUpload 上传图片实例
- ASP.NET
- 一个无刷新效果定时自动更新页面的例子
- ASP.NET2.0的控件状态和视图状态探讨
- 用好ASP.NET 2.0的URL映射
- 详解：如何在.NET中访问MySQL数据库？
- 如何实现Asp与Asp.Net共享Session
- 利用.net的强大功能发送email
- .NET中加密与解密QueryString的方法
- Asp.net生成htm静态文件的两种途径
- C#定时器的使用
- 从XML文件中读取数据绑定到DropDownList
- ASP.NET 2.0 里输出文本格式流
- 用.net动态创建类的实例
- .Net下的MSMQ的同步异步调用
- ASP.NET 2.0实现防止同一用户同时登陆
- asp.NET自定义服务器控件内部细节
- 组合.NET数据控件构建强大用户接口
- 用ASP.NET 2.0 FormView控件控制显示
- 菜鸟也学习ASP.NET如何读取数据库内容
- 教你简单方便获取Web设计的免费资源
- 专家详解：复杂表达式的执行步骤
ASP.NET FileUpload 上传图片实例
出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-09-13 浏览: 127 ::
收藏到网摘: n/a
Add a FileUpload control to the aspx page
复制代码 代码如下:
<table style="width: 100%">
<tr>
<td>
<asp:ValidationSummary ID="ValidationSummary1" runat="server" />
<br />
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="btn_upload" runat="server" OnClick="btn_upload_Click"
Text="Upload" />
<asp:CustomValidator ID="CustomValidator1" runat="server"
ControlToValidate="FileUpload1" Display="Static"
ErrorMessage="You should only can upload image file such as files with .jpg or gif extension"
OnServerValidate="Image_validate">*</asp:CustomValidator>
</td>
</tr>
</table>
Add to code behind cs file
复制代码 代码如下:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Drawing;
public partial class practice_FileUpload : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btn_upload_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
string path = @Page.MapPath("User_Edit.aspx").Replace("User_Edit.aspx", "") + "Documents\\";
string s = path + Session["UserName"].ToString();
if (!System.IO.Directory.Exists(path + Session["UserName"].ToString()))
{
System.IO.Directory.CreateDirectory(path + Session["UserName"].ToString());
}
if (FileUpload1.HasFile)
{
FileUpload1.SaveAs(Server.MapPath("~/Seeker/Documents/" + Session["UserName"].ToString() + "/" + this.FileUpload1.FileName));
}
}
}
protected void Image_validate(object source, ServerValidateEventArgs args)
{
string fileExt = Path.GetExtension(FileUpload1.FileName).ToLower();
string fileName = Path.GetFileName(FileUpload1.FileName);
if (fileExt != ".jpg" && fileExt != ".gif")
{
args.IsValid = false;
}
}
protected void CustomValidator2_ServerValidate(object source, ServerValidateEventArgs args)
{
Bitmap bmIP = new Bitmap(FileUpload1.PostedFile.InputStream);
if (bmIP.Width > 100 | bmIP.Height > 100)
{
args.IsValid = false;
}
else
{
args.IsValid = true;
}
}
}
The default size of files uploaded by the FileUpload control is 4MB. This solution was found from the Internet。
值得注意的是，FileUpload 默认上传文件最大为4MB。这是在网上找到的。
如果要增加，则可以在Machine.config里面进行修改
复制代码 代码如下:
<httpRuntime
executionTimeout = "110" [in Seconds][number
maxRequestLength = "4096" [number]
requestLengthDiskThreshold = "80" [number]
useFullyQualifiedRedirectUrl = "false" [true|false]
minFreeThreads = "8" [number]
minLocalRequestFreeThreads = "4" [number]
appRequestQueueLimit = "5000" [number]
enableKernelOutputCache = "true" [true|false]
enableVersionHeader = "true" [true|false]
apartmentThreading = "false" [true|false]
requireRootedSaveAsPath = "true" [true|false]
enable = "true" [true|false]
sendCacheControlHeader = "true" [true|false]
shutdownTimeout = "90" [in Seconds][number]
delayNotificationTimeout = "5" [in Seconds][number]
waitChangeNotification = "0" [number]
maxWaitChangeNotification = "0" [number]
enableHeaderChecking = "true" [true|false]
/>
评论 (0) All
