一、HTML添加文件标签：
<input type=”file” name=”ImageAddress” /><input type=”button” value=”上传” id=”btnUpload” />
二、添加按钮点击事件：
$(function () {
$("#btnUpload").click(function() {
$("form").ajaxSubmit({
url: "/ActionInfo/Upload",
type:"Post",
success: function(data) {
//返回后台保存图片的服务器地址就可以了。
if (data == "error") {
alert("错误了");
} else {
$("#imgDiv").html("<img src="" + data + "" alt="" />");
$("#IconUrl").val(data);
}
}
});
})
三、添加图片处理程序：
public ActionResult Upload()
{
if (Request.Files.Count > 0)
{
var file = Request.Files[0];
string virthPath = "/Upload/Images/" + Guid.NewGuid().ToString()+file.FileName;
string name = Server.MapPath(virthPath);
file.SaveAs(name);
return Content(virthPath);
}
return Content("error");
}
四、生成图片缩略图
HttpPostedFile file = context.Request.Files["file1"];
string filename = Guid.NewGuid().ToString() + "_" + file.FileName;
int hascode = filename.GetHashCode();
using (Image imageBig = Image.FromStream(file.InputStream))
{
int bWidth = imageBig.Width;
int bHeight = imageBig.Height;
using (Image simage = new Bitmap(200, 200 * bHeight / bWidth))
{
using (Graphics g = Graphics.FromImage(simage))
{
g.DrawImage(imageBig, 0, 0, simage.Width, simage.Height);
}
imageBig.Save(context.Request.MapPath("大图_" + filename));
simage.Save(context.Request.MapPath("小图_" + filename));
}
}
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