上传用户头像
如何点击一个按钮，弹出选择文件对话框，选择图片后自动上传并显示在image控件中？ --------------------编程问答-------------------- 请查阅上传控件 --------------------编程问答-------------------- --------------------编程问答-------------------- <%@ Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Button1_Click(object sender, EventArgs e)
{
FileUpload1.SaveAs(Server.MapPath("~/" + System.IO.Path.GetFileName(FileUpload1.FileName)));
Image1.Visible = true;
Image1.ImageUrl = "~/" + System.IO.Path.GetFileName(FileUpload1.FileName);
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
</head>
<body>
<form id="form1" runat="server">
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
<asp:Image ID="Image1" runat="server" Visible="false" />
</form>
</body>
</html>
--------------------编程问答-------------------- asp:FileUpoload 控件 --------------------编程问答-------------------- change 事件上写上你上传代码同时替换掉路径 --------------------编程问答-------------------- FileUpload控件上传。使用文件流。 --------------------编程问答--------------------
<div id="uphead">
<div id="myimg">
<%-- <asp:Image ID="newPreview" runat="server" />--%>
<img id="newPreview" runat="server" alt="我的头像" src="" />
</div>
<div id="MyFileUpload1">
<asp:FileUpload ID="FileUpload1" runat="server" Height="22px" onchange="showprepic(this.value)"
Width="250px" />
</div>
<asp:HiddenField ID="HiddenField1" runat="server" />
注：上传图片必须小于50k，大小为130px*127px为佳</div>
后台
#region 上传图片--------------------编程问答-------------------- asp:FileUpoloa 控件 --------------------编程问答--------------------
public string ShowPotole()
{
try
{
string fileName = "";
string fileName1 = "";
if (this.FileUpload1.HasFile)//检查是否有文件
{
string fullFileName = this.FileUpload1.PostedFile.FileName;//文件路径名
fileName = fullFileName.Substring(fullFileName.LastIndexOf("\\") + 1); //图片名称
string type = fullFileName.Substring(fullFileName.LastIndexOf(".") + 1); //图片格式
if (type == "jpg" || type == "JPG" || type == "gif" || type == "GIF" || type == "BMP" || type == "bmp" || type == "png") //判断是否为图片类型
{
if (this.FileUpload1.PostedFile.ContentLength > 200 * 1024)
{
Response.Write("<script>alert('上传图片必须小于50k！');</script>");
return "";
}
else
{
string path = HttpContext.Current.Request.MapPath("~/");//获取上传文件的网站目录路径
if (File.Exists(Server.MapPath("~/AmyShow/" + fileName)))//(这个地方做判断是不是 有这 张图片如果已经有图片 则不能上传 )
{
Response.Write("<script>alert('图片名称已经存在！，不允许上传！');</script>");
return "";
}
else
{
fileName1 = "AmyShow/" + DateTime.Now.ToString("yyyyMMddhhmmss") + fileName.ToString();
this.FileUpload1.SaveAs(path + fileName1);//存储文件到磁盘
// this.newPreview.InnerText. = "~/admin/img/" + fileName;//显示图片
// this.newPreview.InnerHtml = "~/admin/img/" + fileName;//显示图片
}
}
}
else
{
return "";
}
}
return fileName1;
}
catch (Exception)
{
throw;
}
}
#endregion
FileUpload...
uploadify...
swfupload...
http://www.cnblogs.com/zhongweiv/archive/2011/11/29/CutAvatar.html --------------------编程问答-------------------- 貌似HTML5提供了新东西。
补充：.NET技术 , ASP.NET
