FileUpload control - files disappears

Also, I have a question regarding attached file control

The idea is the following:

I created a contact us page, where a visitor will enter his comments and may or may not attached a file. Once the visitor click on submit.

Two things should happen.

Email will be sent to admin with attachments // this works fine

Attached file is inserted to database table. // posted files disappear ):

The problem I am facing is when I consumed “FileUpload” object when I send email, the code in the method below shows no posted files. however, where I comment out the method that send attachment to email. The postedFiles in the method below contains all the file.

I am not sure if I cannot consume FileUpload.PostedFiles twice. only one time it works, but when I want to consume it twice, by calling email attachment and saving attachment to database it gives me posted files is zero.

please advise and explain thanks

Here is the code that insert the file to database>>>

protected int pushEmailAttachmentsToDb(string tableName, int intDocOwnerId)
{
int rtn = 0;
try
{
string mySql = @" insert into " + tableName + "(docOwnerId ,DocName,ContentType,DocData) " +
" values(@docOwnerId, @DocName, @ContentType, @DocData)";
// save files to DB
foreach (HttpPostedFile postedFile in FileUpload.PostedFiles) // here is the issue, postedFiles is empty.
// foreach (HttpPostedFile postedFile in myUploadedFiles.)
{
string filename = Path.GetFileName(postedFile.FileName);
string contentType = postedFile.ContentType;
using (Stream fs = postedFile.InputStream)
{
using (BinaryReader br = new BinaryReader(fs))
{
byte[] bytes = br.ReadBytes((Int32)fs.Length);
CRUD DocInsert = new CRUD(); // added Nov 2017
Dictionary<string, Object> p = new Dictionary<string, object>();
p.Add("@docOwnerId", intDocOwnerId); // mySenderId
p.Add("@DocName", filename);
p.Add("@ContentType", contentType);
p.Add("@DocData", bytes);
rtn = DocInsert.InsertUpdateDelete(mySql, p);
}
}
}
return rtn;
}
catch (Exception ex)
{
lblOutput.Text = ex.ToString()
return rtn;
}
}

for more information, click the link below

https://kfmcvlos-my.sharepoint.com/:f:/g/personal/ahameed_kfmc_med_sa/Eg1OuohHZfhBgVsU8qQTNjwBaxBVn67JvU_0BO5o0gtRmw?e=MGPjza

thanks

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Jignesh Kumar6y ago
Hi,

Generally File upload control does not maintain state while postback in asp .net.
Please check this link
https://forums.asp.net/t/1425325.aspx?How+to+read+the+same+file+twice+using+stream+reader

Or,

You can store posted file in session and get from session values when you requre. At last you need to clear session data. some thing like below.
if(Session["UploadControl"] == null && FileUpload.HasFile)
{
Session["UploadControl"] = FileUpload;
}
Al6y ago
Thanks
Salman Beg6y ago
Hi. FileUpload.PostedFiles cannot consume twice. When you submit button then it will comes to FileUpload.PostedFiles but again if you need then you need to upload again. But one trick is there, when you upload then save it in the local folder and when you need it again just get the file from that folder and save it in db. After you saved delete that file from the folder. thanks