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标题 asp.net+ajaxfileupload.js 实现文件异步上传代码分享
内容
    由于代码很简单,这里就闲话不多说了,直接上代码,小伙伴们自己研读代码就明白了。
    前台代码:
    代码如下:
    /*修改头像*/
    //上传
    function _sc() {
    $(".ckfile").html("").css("color", "#535353");
    $("#_userImgPath").val("");
    var str = $("#file").val();
    if ($.trim(str) == "") {
    $(".ckfile").html("请选择文件。").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", "上传中,请稍后…");
    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", "我的头像");
    $("#_userImgPath").val(msg);
    }
    }
    });
    } else {
    $(".ckfile").html("文件格式错误。").css("color", "red");
    return false;
    }
    }
    }
    后台代码:
    代码如下:
    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;
    //文件类型
    private string type = ".jpg|.jpeg|.png|.gif|.bmp";
    //保存名称
    string name = "";
    //保存路径
    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>
    /// 上传图片
    /// </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("文件错误。");
    Response.End();
    return;
    }
    if (size * 1024 < _size)
    {
    Response.Write("文件过大,最大限制为" + 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("文件格式错误。");
    Response.End();
    return;
    }
    //保存路径
    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,出错了。");
    Response.End();
    }
    }
    }
    }
    是不是很实用,也很简单易懂呢,以上是自己项目中使用的代码,小伙伴们如果发现有问题的地方,还请告之。谢谢
随便看

 

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更新时间:2025/5/18 12:27:23