Extjs文件上传

1.前台js代码

var formPanel = new Ext.form.FormPanel({

        title: '标识',

        labelAlign: 'right',

        buttonAlign: 'center',

        labelWidth: 80,

        defaults: { autoWidth: true },

        padding: 10,

        frame: false,

        border: false,

        autoScroll: true,

        fileUpload: true,

        items: [       

                {

                    layout: 'column',

                    border: false,

                    columnWidth: 1,

                    items:

                     [

                      {

                          columnWidth: 1,

                          layout: 'form',

                          border: false,

                          items: [MLCBMXX,MLCGYS,

                                   [

                                     {

                                         xtype: 'textfield',

                                         id: 'txtFile',

                                         fieldLabel: '仓储数据文件',

                                         inputType: 'file',

                                         buttonText: '浏览',

                                         width: 258

                                     }

                                    ]

                                 ]

                      }

                     ]

                }        

               ],

          bbar: [

                 {

                    text:'上传',

                    iconCls: 'icon_uploading',

                    handler: function() {

                    

                    if (!formPanel.getForm().isValid()) {

                        Ext.MessageBox.alert("信息", "表单输入验证失败，请正确填写完整！");

                        return;

                    }

 

                        formPanel.form.submit({

                            waitMsg: 'Uploading ....',

                            url: 'Upload.ashx',

                            method: "POST",

                            success: function(form, action) {

                             

                            },

                            failure:function(form,action){



                            }



                            }

                            

                        });

                        

                    }                 

                 }

                ]               

     });

2.后台"一般处理程序"Upload.ashx

<%@ WebHandler Language="C#" Class="Upload" %>

using System;

using System.Web;

using System.IO;

using System.Web.Script.Serialization;

using System.Collections;

using System.Collections.Generic;

using System.Web.Services;

using System.Web.Services.Protocols;

using System.Xml;

using System.Data;

using System.Text;

using Inch.Base.Web;

using Inch.Base.Database;



public class Upload : IHttpHandler {

    

    public void ProcessRequest (HttpContext context) {

        FileInfo info = new FileInfo();

        try

        {

            info.success = true;   

            int iTotal = context.Request.Files.Count;

            if (iTotal == 0)

                return;

            HttpPostedFile file = context.Request.Files[0];

            int len = file.ContentLength;

            if (len > 0 && !string.IsNullOrEmpty(file.FileName))

            {

                string parentPath = HttpContext.Current.Server.MapPath("~/upload/");

                if (!Directory.Exists(parentPath))

                {

                    Directory.CreateDirectory(parentPath);

                }

                file.SaveAs(Path.Combine(parentPath, Path.GetFileName(file.FileName)));



                info.path = Path.Combine(parentPath, Path.GetFileName(file.FileName));

                info.name = Path.GetFileName(file.FileName);

                info.size = len.ToString();

                info.isError = false;

            }

        }

        catch (Exception e)

        {

            info.errorMessage = e.Message;

            info.isError = true;

        }

        finally

        {

            JavaScriptSerializer j = new JavaScriptSerializer();

            context.Response.Write(j.Serialize(info));

            context.Response.End();

        }

    }





    public string json(System.Data.DataTable data)

    {

        int colums = data.Columns.Count;

        StringBuilder str = new StringBuilder();

        foreach (DataRow row in data.Rows)

        {

            string rowStr = "";

            foreach (DataColumn Column in data.Columns)

            {

                rowStr = rowStr + ",'" + row[Column.ColumnName] + "'";

            }

            if (rowStr != "")

                rowStr = rowStr.Substring(1);

            str.Append(",").Append("[").Append(rowStr).Append("]");

        }

        if (str.ToString() != null && str.ToString() != "")

            return "[" + str.ToString().Substring(1) + "]";

        else

            return "[]";

    }



    public bool IsReusable

    {

        get

        {

            return false;

        }

    }



    public class FileInfo

    {

        public string name;

        public string path;

        public string size;

        public string tp;

        public bool success;

        public string errorMessage;

        public bool isError;

    }

}