using HtmlInputFile problem

[Viktor Popov]

Hi,

I'm trying to upload a file and I do that with this code, but there is a
thing which doesn't work. I can't understand how to check if it isn't
written the path to the file(the text field of <input> control is empty) or
it is.
I have tryed with the following:
if( filMyFile.Poste dFile != null) //HtmlInputFile filMyFile;
{
code
}
else
{
code
}

and with:
if(filMyFile.Va lue=="")
{
code
}
else
{
code
}
but everytime( when the text filed with the path is empty or filled) the if
statement works in same way.
How could be checked if the path is filled or it isn't?
Here is my code.Thank you in advance!

private void Button1_Click(o bject sender, System.EventArg s e)
{
msg.Text="";
if(filMyFile.Po stedFile != null)
{
try
{
// Get a reference to PostedFile object
HttpPostedFile myFile = filMyFile.Poste dFile;
// Get size of uploaded file
int nFileLen = myFile.ContentL ength;
if(myFile.Conte ntType.CompareT o("image/gif")==0)
{
// Allocate a buffer for reading of the file
byte[] myData = new byte[nFileLen];
// Read uploaded file from the Stream
myFile.InputStr eam.Read(myData , 0, nFileLen);
string strFilename = Path.GetFileNam e(myFile.FileNa me);
string strDir = "c:\\Inetpub\\w wwroot\\Estates \\Files\\" +
Session["usrName"].ToString();
Directory.Creat eDirectory( strDir);
string
strRoute=MapPat h("/Estates/Files/"+Session["usrName"].ToString()+"/"+strFile
name);
//string strFilename = Path.GetFileNam e(myFile.FileNa me);
//string strRoute=MapPat h("/Estates/Files/"+strFilena me );
WriteToFile(str Route,myData);
msg.Text="The file was attached";
}
else
{
msg.Text="This file is not a gif!!!";
}
}
catch(Exception exc)
{
msg.Text = "Error by saving: " + exc.ToString();
}
}
else
{
msg.Text="Pleas e, atach your file!";
return;
}
}
---
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[Alan Ferrandiz [MCT]]

I use this JavaScript (see below) code to check for the existence/selection of a file but instead of writing the client code directly into the aspx page I use the RegisterStartup Script method. In this script I validate the user input by allowing them to enter just ..doc files. It's more efficient since the page has no need to make a roundtrip just for validation purposes. Run this code in the Page_Load event handler.

In my case, the HTML input file is a HTML server control and its name (client attribute and case sensitive, do not confuse with ID server-side attribute) is txtFile and the ASP.NET button is named btnEnviar. Set the encType="multip art/form-data" attribute in the HTML form of your upload page

Hope this helps
Alan Ferrandiz
MCSD, MCT, MSF Practitioner

Dim sb As New System.Text.Str ingBuilder()
sb.Append("<scr ipt language=""Java Script"">")
sb.Append(vbNew Line)
sb.Append(" function btnEnviarOnClic k()")
sb.Append(vbNew Line)
sb.Append(" {")
sb.Append(vbNew Line)
sb.Append(" var archivo = document.Form1. txtFile.value;" )
sb.Append(vbNew Line)
sb.Append(" if (archivo.length )")
sb.Append(vbNew Line)
sb.Append(" {")
sb.Append(vbNew Line)
sb.Append(" var extension = document.Form1. txtFile.value;" )
sb.Append(vbNew Line)
sb.Append(" extension = extension.subst ring(extension. length-3,extension.len gth);")
sb.Append(vbNew Line)
sb.Append(" extension = extension.toLow erCase();")
sb.Append(vbNew Line)
sb.Append(" if(extension != 'doc')")
sb.Append(vbNew Line)
sb.Append(" {")
sb.Append(vbNew Line)
sb.Append(" window.alert("" Selecciono un archivo ."" + extension + "", por favor seleccione un archivo .doc"");")
sb.Append(vbNew Line)
sb.Append(" document.Form1. txtFile.focus() ;")
sb.Append(vbNew Line)
sb.Append(" return false;")
sb.Append(vbNew Line)
sb.Append(" }")
sb.Append(vbNew Line)
sb.Append(" else")
sb.Append(vbNew Line)
sb.Append(" return true;")
sb.Append(vbNew Line)
sb.Append(" }")
sb.Append(vbNew Line)
sb.Append(" else")
sb.Append(vbNew Line)
sb.Append(" {")
sb.Append(vbNew Line)
sb.Append(" window.alert("" Debe seleccionar un archivo"");")
sb.Append(vbNew Line)
sb.Append(" document.Form1. txtFile.focus() ;")
sb.Append(vbNew Line)
sb.Append(" return false;")
sb.Append(vbNew Line)
sb.Append(" }")
sb.Append(vbNew Line)
sb.Append(" }")
sb.Append(vbNew Line)
sb.Append("</script>")

Page.RegisterSt artupScript("", sb.ToString)
btnEnviar.Attri butes.Add( "onClick", "return btnEnviarOnClic k();")


"Viktor Popov" <vi****@yahoo.c om> escribió en el mensaje news:uJ******** ******@tk2msftn gp13.phx.gbl...

Hi,

I'm trying to upload a file and I do that with this code, but there is a
thing which doesn't work. I can't understand how to check if it isn't
written the path to the file(the text field of <input> control is empty) or
it is.
I have tryed with the following:
if( filMyFile.Poste dFile != null) //HtmlInputFile filMyFile;
{
code
}
else
{
code
}

and with:
if(filMyFile.Va lue=="")
{
code
}
else
{
code
}
but everytime( when the text filed with the path is empty or filled) the if
statement works in same way.
How could be checked if the path is filled or it isn't?
Here is my code.Thank you in advance!



private void Button1_Click(o bject sender, System.EventArg s e)
{
msg.Text="";
if(filMyFile.Po stedFile != null)
{
try
{
// Get a reference to PostedFile object
HttpPostedFile myFile = filMyFile.Poste dFile;
// Get size of uploaded file
int nFileLen = myFile.ContentL ength;
if(myFile.Conte ntType.CompareT o("image/gif")==0)
{
// Allocate a buffer for reading of the file
byte[] myData = new byte[nFileLen];
// Read uploaded file from the Stream
myFile.InputStr eam.Read(myData , 0, nFileLen);
string strFilename = Path.GetFileNam e(myFile.FileNa me);
string strDir = "c:\\Inetpub\\w wwroot\\Estates \\Files\\" +
Session["usrName"].ToString();
Directory.Creat eDirectory( strDir);
string
strRoute=MapPat h("/Estates/Files/"+Session["usrName"].ToString()+"/"+strFile
name);
//string strFilename = Path.GetFileNam e(myFile.FileNa me);
//string strRoute=MapPat h("/Estates/Files/"+strFilena me );
WriteToFile(str Route,myData);
msg.Text="The file was attached";
}
else
{
msg.Text="This file is not a gif!!!";
}
}
catch(Exception exc)
{
msg.Text = "Error by saving: " + exc.ToString();
}
}
else
{
msg.Text="Pleas e, atach your file!";
return;
}
}


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.729 / Virus Database: 484 - Release Date: 27.7.2004 a.