C# ASP.NET-使用会话存储文件上载对象

我想存储一个

FileUpload

对象，该对象包含

会话中的图像。然后在下一页，我想将图像保存到一个文件夹中。我可以做到这一点，没有任何问题，但当我试图存储一个更大的图像，图像变成0kb和Windows照片查看器说，该文件是空的。这是我的密码：

上传表单页面（C）：

//FileUploadPicture is of type FileUpload
Session["fileupload_object"] = FileUploadPicture;

Boolean imageUploadStatus = false;
string imageExtension = System.IO.Path.
    GetExtension(((FileUpload)Session["fileupload_object"]).FileName);
string[] acceptedImageExtensions = { ".gif", ".png", ".jpg", ".jpeg" };

for (int i = 0; i < acceptedImageExtensions.Length; i++)
{
    if (imageExtension.Equals(acceptedImageExtensions[i],
        StringComparison.InvariantCultureIgnoreCase))
        {
            imageUploadStatus = true;
        }
}

try
{

((FileUpload)Session["fileupload_object"]).PostedFile.
    SaveAs(imagePath + ((FileUpload)Session["fileupload_object"]).FileName);

}

catch (Exception ex) { }

Session["fileupload_filename"] = FileUploadPictureOfPaymentStatement.FileName;
HttpPostedFile httpPostedFile = FileUploadPictureOfPaymentStatement.PostedFile;
System.Drawing.Image image = Bitmap.FromStream(httpPostedFile.InputStream);
Session["image"] = image;

Boolean imageUploadStatus = false;
string imageExtension = System.IO.Path.GetExtension((Session["fileupload_filename"])
    .ToString());
string[] acceptedImageExtensions = { ".gif", ".png", ".jpg", ".jpeg" };
for (int i = 0; i < acceptedImageExtensions.Length; i++)
{
    if (imageExtension.Equals(acceptedImageExtensions[i], 
        StringComparison.InvariantCultureIgnoreCase))
    {
        imageUploadStatus = true;
    }
}

if(imageUploadStatus)
{
    try
    {
        ((System.Drawing.Image)Session["image"])
            .Save(imagePath + Session["fileupload_filename"].ToString());
    } catch(Exception ex) { }
}

将图片保存到文件夹页面（C#）：

//FileUploadPicture is of type FileUpload
Session["fileupload_object"] = FileUploadPicture;

Boolean imageUploadStatus = false;
string imageExtension = System.IO.Path.
    GetExtension(((FileUpload)Session["fileupload_object"]).FileName);
string[] acceptedImageExtensions = { ".gif", ".png", ".jpg", ".jpeg" };

for (int i = 0; i < acceptedImageExtensions.Length; i++)
{
    if (imageExtension.Equals(acceptedImageExtensions[i],
        StringComparison.InvariantCultureIgnoreCase))
        {
            imageUploadStatus = true;
        }
}

try
{

((FileUpload)Session["fileupload_object"]).PostedFile.
    SaveAs(imagePath + ((FileUpload)Session["fileupload_object"]).FileName);

}

catch (Exception ex) { }

Session["fileupload_filename"] = FileUploadPictureOfPaymentStatement.FileName;
HttpPostedFile httpPostedFile = FileUploadPictureOfPaymentStatement.PostedFile;
System.Drawing.Image image = Bitmap.FromStream(httpPostedFile.InputStream);
Session["image"] = image;

Boolean imageUploadStatus = false;
string imageExtension = System.IO.Path.GetExtension((Session["fileupload_filename"])
    .ToString());
string[] acceptedImageExtensions = { ".gif", ".png", ".jpg", ".jpeg" };
for (int i = 0; i < acceptedImageExtensions.Length; i++)
{
    if (imageExtension.Equals(acceptedImageExtensions[i], 
        StringComparison.InvariantCultureIgnoreCase))
    {
        imageUploadStatus = true;
    }
}

if(imageUploadStatus)
{
    try
    {
        ((System.Drawing.Image)Session["image"])
            .Save(imagePath + Session["fileupload_filename"].ToString());
    } catch(Exception ex) { }
}

将图片保存到文件夹页面（C#）：

//FileUploadPicture is of type FileUpload
Session["fileupload_object"] = FileUploadPicture;

Boolean imageUploadStatus = false;
string imageExtension = System.IO.Path.
    GetExtension(((FileUpload)Session["fileupload_object"]).FileName);
string[] acceptedImageExtensions = { ".gif", ".png", ".jpg", ".jpeg" };

for (int i = 0; i < acceptedImageExtensions.Length; i++)
{
    if (imageExtension.Equals(acceptedImageExtensions[i],
        StringComparison.InvariantCultureIgnoreCase))
        {
            imageUploadStatus = true;
        }
}

try
{

((FileUpload)Session["fileupload_object"]).PostedFile.
    SaveAs(imagePath + ((FileUpload)Session["fileupload_object"]).FileName);

}

catch (Exception ex) { }

Session["fileupload_filename"] = FileUploadPictureOfPaymentStatement.FileName;
HttpPostedFile httpPostedFile = FileUploadPictureOfPaymentStatement.PostedFile;
System.Drawing.Image image = Bitmap.FromStream(httpPostedFile.InputStream);
Session["image"] = image;

Boolean imageUploadStatus = false;
string imageExtension = System.IO.Path.GetExtension((Session["fileupload_filename"])
    .ToString());
string[] acceptedImageExtensions = { ".gif", ".png", ".jpg", ".jpeg" };
for (int i = 0; i < acceptedImageExtensions.Length; i++)
{
    if (imageExtension.Equals(acceptedImageExtensions[i], 
        StringComparison.InvariantCultureIgnoreCase))
    {
        imageUploadStatus = true;
    }
}

if(imageUploadStatus)
{
    try
    {
        ((System.Drawing.Image)Session["image"])
            .Save(imagePath + Session["fileupload_filename"].ToString());
    } catch(Exception ex) { }
}

Boolean imageUploadStatus=false；
字符串imageExtension=System.IO.Path.GetExtension（（会话[“文件上传\文件名]）
.ToString（））；
字符串[]acceptedImageExtensions={.gif“，.png“，.jpg“，.jpeg”}；
for（int i=0；i
正如菲利佩·德古奇（Felipe Deguchi）在评论中指出的那样，这个问题只是一个重复的问题

我只需要补充一点：

<system.web>
<httpRuntime executionTimeout="90" 
             maxRequestLength="20000" 
             useFullyQualifiedRedirectUrl="false" 
             requestLengthDiskThreshold="8192"/>
</system.web>



在我的
Web.config
嗨，你试过了吗？如果你真的，真的，必须在会话中存储这个，不要存储实际的文件上传控制-保存文件数据本身。另外，你如何处理
imageUploadStatus
？您没有真正验证是否只保存已接受的扩展这是个坏主意，在会话中存储图像的数据量…@Darren是的，我已更改为只将
文件名和
文件字节存储到
会话中，但问题仍然存在。