由於代碼很簡單，這裡就閒話不多說了，直接上代碼，小伙伴們自己研讀代碼就明白了。
前台代碼：
復制代碼 代碼如下:
/*修改頭像*/
//上傳
function _sc() {
$(".ckfile").html("").css("color", "#535353");
$("#_userImgPath").val("");
var str = $("#file").val();
if ($.trim(str) == "") {
$(".ckfile").html("請選擇文件。").css("color", "red");
return false;
}
else {
var postfix = str.substring(str.lastIndexOf(".") + 1).toUpperCase();
if (postfix == "JPG" || postfix == "JPEG" || postfix == "PNG" || postfix == "GIF" || postfix == "BMP") {
$('#showimg').attr('src', 'Images/loading.gif').attr("title", "上傳中，請稍後…");
var path = "Upload/UserImg";
$.ajaxFileUpload({
url: '/Upload.aspx?path=Upload|UserImg&shape=100*100',
secureuri: false,
fileElementId: 'file',
dataType: 'text',
success: function (msg) {
if (msg.lastIndexOf(path) == -1) {
$(".ckfile").html(msg).css("color", "red");
}
else {
$('#showimg').attr('src', msg).attr("title", "我的頭像");
$("#_userImgPath").val(msg);
}
}
});
} else {
$(".ckfile").html("文件格式錯誤。").css("color", "red");
return false;
}
}
}
後台代碼：
復制代碼 代碼如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using SS.Upload;
using WFC.Fenxiao;
namespace wanfangcheng
{
public partial class Upload : BasePage
{
//文件大小 1024 kb
private long size = 1024;
//文件類型
private string type = ".jpg|.jpeg|.png|.gif|.bmp";
//保存名稱
string name = "";
//保存路徑
private string path = @"Upload/UserImg";
//保存大小
private string shape = "100*100";
protected void Page_Load(object sender, EventArgs e)
{
HttpFileCollection files = Request.Files;
if (files != null && files.Count > 0)
{
name = BaseRole.Instance.UserId.ToString();
if (Request.QueryString["size"] != null)
{
size = Convert.ToInt32(Request.QueryString["size"]);
}
if (Request.QueryString["path"] != null)
{
path = Request.QueryString["path"].ToString().Trim().Replace('|', '/');
}
if (Request.QueryString["name"] != null)
{
name = Request.QueryString["name"].ToString().Trim();
}
if (Request.QueryString["shape"] != null)
{
shape = Request.QueryString["shape"].ToString().Trim();
}
uploadMethod(files);
}
}
/// <summary>
/// 上傳圖片
/// </summary>
/// <param name="hc"></param>
public void uploadMethod(HttpFileCollection hc)
{
HttpPostedFile _file = hc[0];
//文件大小
long _size = _file.ContentLength;
if (_size <= 0)
{
Response.Write("文件錯誤。");
Response.End();
return;
}
if (size * 1024 < _size)
{
Response.Write("文件過大,最大限制為" + size + "KB。");
Response.End();
return;
}
//文件名
string _name = _file.FileName;
//文件格式
string _tp = System.IO.Path.GetExtension(_name).ToLower();
if (type.IndexOf(_tp) == -1)
{
Response.Write("文件格式錯誤。");
Response.End();
return;
}
//保存路徑
string _path = HttpContext.Current.Server.MapPath(path) + @"/" + name + _tp;
try
{
int w = Convert.ToInt32(shape.Split('*')[0]);
int h = Convert.ToInt32(shape.Split('*')[1]);
ImageHelper.CutForCustom(_file, _path, w, h, 50);
Response.Write(path + @"/" + name + _tp);
}
catch (Exception)
{
Response.Write("哎呦，出錯了。");
Response.End();
}
}
}
}
是不是很實用，也很簡單易懂呢，以上是自己項目中使用的代碼，小伙伴們如果發現有問題的地方，還請告之。謝謝
