以下是我做之前在网上找的例子,但是后台文件保存那一块不太适合我的系统,我做了下修改,具体的修改已经在文章名为“java中怎样反向显示字符串(很多地方值得借鉴)”一文中一一列出,如果下面的对大家的系统不适用,你可参照我的实例。
最近用Extjs做项目,用到htmleditor控件,唯一的缺陷是不可以上传图片,为了以后方便,在基于htmleditor控件上写了一个支持上传图片的。
控件StarHtmleditor
/**
* 重载EXTJS-HTML编辑器
*
* @class HTMLEditor
* @extends Ext.form.HtmlEditor
* @author wuliangbo
*/
HTMLEditor = Ext.extend(Ext.form.HtmlEditor, {
addImage : function() {
var editor = this;
var imgform = new Ext.FormPanel({
region : 'center',
labelWidth : 55,
frame : true,
bodyStyle : 'padding:5px 5px 0',
autoScroll : true,
border : false,
fileUpload : true,
items : [{
xtype : 'textfield',
fieldLabel : '选择文件',
name : 'userfile',
inputType : 'file',
allowBlank : false,
blankText : '文件不能为空',
height : 25,
anchor : '90%'
}],
buttons : [{
text : '上传',
type : 'submit',
handler : function() {
if (!imgform.form.isValid()) {return;}
imgform.form.submit({
waitMsg : '正在上传',
url : 'Default.aspx',
success : function(form, action) {
var element = document.createElement("img");
element.src = action.result.fileURL;
if (Ext.isIE) {
editor.insertAtCursor(element.outerHTML);
} else {
var selection = editor.win.getSelection();
if (!selection.isCollapsed) {
selection.deleteFromDocument();
}
selection.getRangeAt(0).insertNode(element);
}
win.hide();
},
failure : function(form, action) {
form.reset();
if (action.failureType == Ext.form.Action.SERVER_INVALID)
Ext.MessageBox.alert('警告',
action.result.errors.msg);
}
});
}
}, {
text : '关闭',
type : 'submit',
handler : function() {
win.close(this);
}
}]
})
var win = new Ext.Window({
title : "上传图片",
width : 300,
height : 200,
modal : true,
border : false,
iconCls : "picture.png",
layout : "fit",
items : imgform
});
win.show();
},
createToolbar : function(editor) {
HTMLEditor.superclass.createToolbar.call(this, editor);
this.tb.insertButton(16, {
cls : "x-btn-icon",
icon : "picture.png",
handler : this.addImage,
scope : this
});
}
});
Ext.reg('StarHtmleditor', HTMLEditor);
页面js代码
Ext.onReady(function() {
Ext.QuickTips.init();
Ext.form.Field.prototype.msgTarget = 'side';
var ff = new Ext.FormPanel({
title : "文件上传",
renderTo : document.body,
width : 600,
height : 480,
labelWidth : 55,
frame : true,
items : [{
xtype : "textfield",
name : "title",
fieldLabel : "标题",
anchor : "98%"
}, {
xtype : "combo",
name : "topic_id",
fieldLabel : "所属栏目",
anchor : "98%"
}, {
xtype : "textfield",
name : "keywords",
fieldLabel : "关键字",
anchor : "98%"
}, {
xtype : "StarHtmleditor",
name : "content",
fieldLabel : "内容",
anchor : "98%"
}]
});
});
后台代码简单实现了一下
protected void Page_Load(object sender, EventArgs e)
{
string fileName = string.Empty;
string fileURL = string.Empty;
string rt = string.Empty;
try
{
HttpPostedFile file = Request.Files[0];
fileName = GetFileName(file.FileName);
file.SaveAs(Server.MapPath("upload//") + fileName);
fileURL = "upload/" + fileName;
rt = "{success:'true',fileURL:'" + fileURL + "'}";
}
catch
{
rt = "{success:'false',fileURL:'" + fileURL + "'}";
}
Response.Write(rt);
}
private string GetFileName(string FullName)
{
string fileName = string.Empty;
int last = FullName.LastIndexOf(@"/");
fileName = FullName.Substring(last + 1, FullName.Length - last - 1);
return fileName;
}
实现效果如下