extjs文件上传

   Ext.QuickTips.init();
 
    var fp = new Ext.FormPanel({
          region : 'center',
          labelWidth : 35,
          frame : true,
          bodyStyle : 'padding:5px 5px 0',
          autoScroll : true,
          border : false,
          fileUpload : true,
          items : [
             {
             xtype : 'textfield',
             fieldLabel : 'File',
             name : 'userfile',
             id:'txtFile',
             inputType : 'file',
             width : 160,
             allowBlank : true,
             blankText : 'File cannot be empty',
             height : 25,
             anchor : '90%'
             },
             {
             bodyStyle:"padding-left:60px",
             html:"<br/><span><font color='#666666'></font></span>"
             }],
          buttons : [{
            text : 'Upload',
            type : 'submit',
            handler : function() {
             if(document.getElementById("txtFile").value == '') return;
             if (!fp.form.isValid()) {return;}
             fp.form.submit({
                waitMsg : 'Uploading ....',
                url : 'FileUpload.ashx',
                success : function(form, action) {
                win.close(this);
                },
                failure : function(form, action) {
               
               
                win.close(this);
                }
                });
             }
             }, {
             text : 'Close',
             type : 'submit',
             handler : function() {
              win.close(this);
              }
              }]
          });

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