Question

最好的办法是将单一档案上载到p.net mvc3 razor,并以jquery加以验证。

我只需要使用上载jpg, 小于5 mb。

成就

Answer 1

你需要用javascript证实,这里是样本。

function onSelect(e) {
    if (e.files[0].size > 256000) {
        alert( The file size is too large for upload );
        e.preventDefault();
        return false;
    }
    // Array with information about the uploaded files
    var files = e.files;
    var ext = $( #logo ).val().split( . ).pop().toLowerCase();
    if ($.inArray(ext, [ gif ,  jpeg ,  jpg ,  png ,  tif ,  pdf ]) == -1) {
        alert( This type of file is restricted from being uploaded due to security reasons );
        e.preventDefault();
        return false;
    } 
    return true;
}

也就是说,档案不得超过256K,只允许gif、jpg、jpeg、tif、png和pdf。仅改动256 000至500 000,具体文件类型

I m在MVC 3中,用这种方式对Telerik上载控制进行raz。你们也可以使用标准上载投入,在选择时或在承诺之前只用火焚烧这一活动。

Answer 2

Aside jQuery validation (very nice Acid s answer) You should also do server validation. Here s some simple example:

http://www.ohchr.org。

@if (TempData["imageUploadFailure"] != null)
{
    @* Here some jQuery popup for example *@
}

@using (Html.BeginForm("ImageUpload", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{                  
    <legend>Add Image</legend>

    <label>Image</label>
    <input name="image" type="file" value=""/>
    <br/>

    <input type="submit" value="Send"/>
}

http://www.ohchr.org。

public ActionResult ImageUpload()
{
    return View();
}

[HttpPost]
public ActionResult ImageUpload(HttpPostedFileBase image)
{
    var result = ImageUtility.SaveImage("/Content/Images/", 1000000, "jpg,png", image, HttpContext.Server);

    if (!result.Success)
    {
        var builder = new StringBuilder();
        result.Errors.ForEach(e => builder.AppendLine(e));

        TempData.Add("imageUploadFailure", builder.ToString());
    }

    return RedirectToAction("ImageUpload");
}

ImageUtility helper class:

public static class ImageUtility
{
    public static SaveImageResult SaveImage(string path, int maxSize, string allowedExtensions,  HttpPostedFileBase image, HttpServerUtilityBase server)
    {
        var result = new SaveImageResult { Success = false };

        if (image == null || image.ContentLength == 0)
        {
            result.Errors.Add("There was problem with sending image.");
            return result;
        }

        // Check image size
        if (image.ContentLength > maxSize)
            result.Errors.Add("Image is too big.");

        // Check image extension
        var extension = Path.GetExtension(image.FileName).Substring(1).ToLower();
        if (!allowedExtensions.Contains(extension))
            result.Errors.Add(string.Format(" {0}  format is not allowed.", extension));

        // If there are no errors save image
        if (!result.Errors.Any())
        {
            // Generate unique name for safety reasons
            var newName = Guid.NewGuid().ToString("N") + "." + extension;
            var serverPath = server.MapPath("~" + path + newName);
            image.SaveAs(serverPath);

            result.Success = true;
        }

        return result;
    }
}

public class SaveImageResult
{
    public bool Success { get; set; }
    public List<string> Errors { get; set; }

    public SaveImageResult()
    {
        Errors = new List<string>();
    }
}

您还可以保留答复格式、不同档案重新命名或增加多个档案处理功能等。

Answer 3

这只是要具体说明要接受的档案类型:2010年管理视听。

In your View(.cshtml):

ATTACHMENT:<input type="file" name="file" id="file" accept=".PNG,.TXT,.JPG,.BMP" />

仅具体说明你所需要的格式。

友情链接