<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 == '') {
$.messager.alert("让选择要上传的图片!");
return false;
}
else {
var fileContentType = obj.value.match(/^(.*)(\.)(.{,})$/)[]; //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[]) {
//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[]);
}
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 = ;
maxheight = ; //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 >= )
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(, str.LastIndexOf("\\") + );
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) > )
{
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：
上传图片时，需要jquery.form.js的js文件，下载地址：http://download.csdn.net/detail/jiuqiyuliang/6919517