MVC+Jquery局部刷新上传图片
<div id="cnblogs_post_body">做了一个简单的MVC局部刷新上传图片的例子来分享一下，希望能对大家有所帮助1、先看一下http://malsup.com/jquery/form/网站因为我们做此项目要用到此提供的一个jquery.form.js文件，里面提供了api过于ajax局部刷新的知识
http://pic002.cnblogs.com/images/2012/386982/2012102121491453.png
2、建一个MVC项目将jquery.form.js加入的javascript文件中
3、写一个PicUploadHander类继承IHttpHandler
<div class="cnblogs_code">public class PicUploadHander : IHttpHandler { public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/plain"; //验证上传的权限TODO string _fileNamePath = ""; try { _fileNamePath = context.Request.Files[0].FileName; //开始上传 string _savedFileResult = UpLoadImage(_fileNamePath, context); context.Response.Write(_savedFileResult); } catch { context.Response.Write("上传提交出错"); } } public string UpLoadImage(string fileNamePath, HttpContext context) { try { string serverPath = System.Web.HttpContext.Current.Server.MapPath("~"); string toFilePath = Path.Combine(serverPath, @"Content\Upload\Images\"); //获取要保存的文件信息 FileInfo file = new FileInfo(fileNamePath); //获得文件扩展名 string fileNameExt = file.Extension; //验证合法的文件 if (CheckImageExt(fileNameExt)) { //生成将要保存的随机文件名 string fileName = GetImageName() + fileNameExt; //获得要保存的文件路径 string serverFileName = toFilePath + fileName; //物理完整路径 string toFileFullPath = serverFileName; //HttpContext.Current.Server.MapPath(toFilePath); //将要保存的完整文件名 string toFile = toFileFullPath;//+ fileName; ///创建WebClient实例 WebClient myWebClient = new WebClient(); //设定windows网络安全认证 方法1 myWebClient.Credentials = CredentialCache.DefaultCredentials; ////设定windows网络安全认证 方法2 context.Request.Files[0].SaveAs(toFile); string relativePath = System.Web.HttpContext.Current.Request.ApplicationPath + string.Format(@"Content/Upload/Images/{0}", fileName); return relativePath; } else { throw new Exception("文件格式非法，请上传gif或jpg格式的文件。"); } } catch (Exception ex) { return ex.Message; } } public bool IsReusable { get { return false; } } #region Private Methods /// <summary> /// 检查是否为合法的上传图片 /// </summary> /// <param name="_fileExt"></param> /// <returns></returns> private bool CheckImageExt(string _ImageExt) { string[] allowExt = new string[] { ".gif", ".jpg", ".jpeg", ".bmp" }; for (int i = 0; i < allowExt.Length; i++) { if (allowExt == _ImageExt) { return true; } } return false; } private string GetImageName() { Random rd = new Random(); StringBuilder serial = new StringBuilder(); serial.Append(DateTime.Now.ToString("yyyyMMddHHmmssff")); serial.Append(rd.Next(0, 999999).ToString()); return serial.ToString(); } #endregion
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