时间:2021-07-01 10:21:17 帮助过:10人阅读
基于ASP.Net +easyUI框架上传图片,实现图片上传,提交表单:
- <body>
- <link href="../../Easyui/themes/easyui.css" rel="stylesheet" type="text/css" />
- <script charset="utf-8" src="../../Easyui/jquery.easyui.min.js" type="text/javascript"></script>
- <script charset="utf-8" src="../../Easyui/easyui-lang-zh_CN.js" type="text/javascript"></script>
- <script charset="utf-8" src="../../Js/jquery.form.js" type="text/javascript"></script>
- <script type="text/javascript">
- //检查图片的格式是否正确,同时实现预览
- function setImagePreview(obj, localImagId, imgObjPreview) {
- var array = new Array('gif', 'jpeg', 'png', 'jpg', 'bmp'); //可以上传的文件类型
- if (obj.value == '') {
- $.messager.alert("让选择要上传的图片!");
- return false;
- }
- else {
- var fileContentType = obj.value.match(/^(.*)(\.)(.{1,8})$/)[3]; //这个文件类型正则很有用
- ////布尔型变量
- var isExists = false;
- //循环判断图片的格式是否正确
- for (var i in array) {
- if (fileContentType.toLowerCase() == array[i].toLowerCase()) {
- //图片格式正确之后,根据浏览器的不同设置图片的大小
- if (obj.files && obj.files[0]) {
- //火狐下,直接设img属性
- imgObjPreview.style.display = 'block';
- imgObjPreview.style.width = '200px';
- imgObjPreview.style.height = '150px';
- //火狐7以上版本不能用上面的getAsDataURL()方式获取,需要一下方式
- imgObjPreview.src = window.URL.createObjectURL(obj.files[0]);
- }
- else {
- //IE下,使用滤镜
- obj.select();
- var imgSrc = document.selection.createRange().text;
- //必须设置初始大小
- localImagId.style.width = "200px";
- localImagId.style.height = "150px";
- //图片异常的捕捉,防止用户修改后缀来伪造图片
- try {
- localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
- localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;
- }
- catch (e) {
- $.messager.alert("您上传的图片格式不正确,请重新选择!");
- return false;
- }
- imgObjPreview.style.display = 'none';
- document.selection.empty();
- }
- isExists = true;
- return true;
- }
- }
- if (isExists == false) {
- $.messager.alert("上传图片类型不正确!");
- return false;
- }
- return false;
- }
- }
- //显示图片
- function over(imgid, obj, imgbig) {
- //大图显示的最大尺寸 4比3的大小 400 300
- maxwidth = 400;
- maxheight = 300;
- //显示
- obj.style.display = "";
- imgbig.src = imgid.src;
- //1、宽和高都超过了,看谁超过的多,谁超的多就将谁设置为最大值,其余策略按照2、3
- //2、如果宽超过了并且高没有超,设置宽为最大值
- //3、如果宽没超过并且高超过了,设置高为最大值
- if (img.width > maxwidth && img.height > maxheight) {
- pare = (img.width - maxwidth) - (img.height - maxheight);
- if (pare >= 0)
- img.width = maxwidth;
- else
- img.height = maxheight;
- }
- else if (img.width > maxwidth && img.height <= maxheight) {
- img.width = maxwidth;
- }
- else if (img.width <= maxwidth && img.height > maxheight) {
- img.height = maxheight;
- }
- };
- //保存信息
- function submitForm() {
- //先上传图片后,再提交
- upLoadFile();
- var test = document.getElementById("test").value = "add";
- var tbName = document.getElementById("tbName").value;
- var idFile = document.getElementById("idFile").value;
- //先判断是否上传图片之后在提交
- $('#ff').form('submit', {
- url: "../../Handler/add.ashx?tbName=" + tbName + "&idFile=" + idFile + "&test=" + test,
- dataType: "json",
- onSubmit: function () {
- if ($(this).form('validate'))
- return true;
- else {
- return false;
- }
- },
- success: function (data) {
- var dataJson = $.parseJSON(data);
- if (dataJson.success) {
- $("#add_address").dialog('destroy'); //销毁dialog对象
- $.messager.alert("提示", dataJson.msg)
- $("#dateList").datagrid("reload").datagrid('clearSelections').datagrid('clearChecked');
- } else {
- $("#add_address").dialog('destroy'); //销毁dialog对象
- $.messager.alert("提示", dataJson.msg)
- }
- }
- });
- }
- //上传图片
- function upLoadFile() {
- var idFile = document.getElementById("idFile").value;
- //判断是否选择图片
- var options = {
- type: "POST",
- url: '../../Handler/InputImg.ashx'
- //success: showResponse
- };
- // 将options传给ajaxForm
- $('#ff').ajaxSubmit(options);
- }
- </script>
- <form id="ff" runat="server" method="post">
- <table style="width: 422px; margin-top: 20px; height: 91px;">
- <tr>
- <th style="text-align: right; width: 100px;" class="style1">
- 链接名称:
- </th>
- <td style="text-align: left" class="style1">
- <asp:TextBox ID="tbID" runat="server" Style="display: none"></asp:TextBox>
- <asp:TextBox ID="tbName" runat="server" Width="274px" Height="20px" class="easyui-validatebox"
- data-options="required:true"></asp:TextBox>
- </td>
- </tr>
- <tr>
- <th style="text-align: right; " class="style2">
- 链接logo:
- </th>
- <td class="style3">
- <div style="width: 307px; height: 22px;">
- 选择图片:<input id="idFile" style="width: 224px" runat="server" name="idFile" onchange="javascript:setImagePreview(this,localImag,preview);"
- type="file" />
- </div>
- <%--预 览:
- <div id="localImag">
- <img id="preview" onclick="over(preview,divImage,imgbig);" src="" style="width: 200px;
- height: 150px;" />
- </div>--%>
- </td>
- </tr>
- </table>
- <div style="width: 325px; text-align: center; margin-top: 20px; margin-left: 50px">
- <input type="hidden" id="test" name="test" />
- <a id="btn_sc" href="javascript:void(0)" class="easyui-linkbutton" onclick="submitForm()">
- 上传</a>
- <a href="Friendly.aspx" class="easyui-linkbutton">取消</a>
- </div>
- </form>
- </body>
提交表单的一般处理程序:
- BLL.J_Friendly frend = null;
- Model.J_Friendly fr = null;
- public void ProcessRequest(HttpContext context)
- {
- context.Response.ContentType = "text/plain";
- string command = context.Request["test"].ToString();//前台传的标示值
- if (command == "add")
- {
- AddFrend(context);
- }
- if (command == "update")
- {
- UpdateFrend(context);
- }
- }
- public void AddFrend(HttpContext context)
- {
- frend = new BLL.J_Friendly();
- fr = new Model.J_Friendly();
- string tbName = context.Request.QueryString["tbName"].Trim();
- if (frend.Exists("F_Name='" + tbName + "'"))
- {
- context.Response.Write("{\"msg\":\"添加失败,链接名称与已有的链接名称重复!\",\"success\":false}");
- return;
- }
- else
- {
- try
- {
- fr.F_Name = context.Request.QueryString["tbName"].Trim();
- }
- catch
- {
- context.Response.Write("{\"msg\":\"添加失败,请核对信息!\",\"success\":false}");
- return;
- }
- try
- {
- string img = context.Request.QueryString["idFile"].Trim();
- if (img == "")
- {
- context.Response.Write("{\"msg\":\"添加失败,请核对图片信息!\",\"success\":false}");
- return;
- }
- else
- {
- string str = context.Request.QueryString["idFile"].Trim();
- string str1 = str.Remove(0, str.LastIndexOf("\\") + 1);
- fr.F_Img = "../../Upload/Images/" + str1;
- }
- }
- catch
- {
- context.Response.Write("{\"msg\":\"添加失败,请核对信息!\",\"success\":false}");
- return;
- }
- }
- if (frend.Add(fr) > 0)
- {
- context.Response.Write("{\"msg\":\"添加成功!\",\"success\":true}");
- }
- else
- {
- context.Response.Write("{\"msg\":\"添加失败,请核对信息!\",\"success\":false}");
- }
- }
原型图:
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