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How to check a uploaded file type using asp.net with C#.net
Jan 21 2020 11:07 AM
Hello Members,
Hope you are doing good!!
How can we check the uploaded file is PDF / doc or docx.
function
ValidateFileUpload(Source, args) {
var
fuData = document.getElementById(
'<%= fileUpload.ClientID %>'
);
var
FileUploadPath = fuData.value;
if
(FileUploadPath ==
''
) {
args.IsValid =
false
;
}
else
{
var
Extension = FileUploadPath.substring(FileUploadPath.lastIndexOf(
'.'
) + 1).toLowerCase();
if
(Extension ==
"doc"
|| Extension ==
"docx"
) {
args.IsValid =
true
;
}
if
(Extension ==
"pdf"
){
args.IsValid =
true
;
}
else
{
args.IsValid =
false
}
}
If it is PDF It needs to fire
<body>
<form id=
"form1"
runat=
"server"
>
<iframe id=
"myFrame"
style=
"display:none"
width=
"600"
height=
"300"
></iframe>
<input type=
"button"
value=
"Submit"
onclick =
"openPdf()"
/>
<script type=
"text/javascript"
>
function
openPdf()
{
var
omyFrame = document.getElementById(
"myFrame"
);
omyFrame.style.display=
"block"
;
omyFrame.src =
"http://www.africau.edu/images/default/sample.pdf"
;
}
</script>
<div>
<asp:TextBox ID=
"searchTxt"
runat=
"server"
Width=
"300px"
Height=
"25px"
Font-Size=
"Medium"
></asp:TextBox>
<input type=
"button"
value=
"Search"
onclick=
"return highlight(text) /*searchPrompt('search text', 'dvWord', false, true, 'red', 'orange')*/"
/>
</div>
</form>
</body>
If it is Doc or DOCX need to fire below doc
<script type="text/javascript">
function doHighlight(DivText, searchTerm, highlightStartTag, highlightEndTag) {
if ((!highlightStartTag) || (!highlightEndTag)) {
highlightStartTag = "<font style='color:blue; background-color:yellow;'>";
highlightEndTag =
"</font>"
;
}
var
newText =
""
;
var
i = -1;
var
lcSearchTerm = searchTerm.toLowerCase();
var
lcDivText = DivText.toLowerCase();
while
(DivText.length > 0) {
i = lcDivText.indexOf(lcSearchTerm, i + 1);
if
(i < 0) {
newText += DivText;
DivText =
""
;
}
else
{
if
(DivText.lastIndexOf(
">"
, i) >= DivText.lastIndexOf(
"<"
, i)) {
if
(lcDivText.lastIndexOf(
"/script>"
, i) >= lcDivText.lastIndexOf(
"<script"
, i)) {
newText += DivText.substring(0, i) + highlightStartTag + DivText.substr(i, searchTerm.length) + highlightEndTag;
DivText = DivText.substr(i + searchTerm.length);
lcDivText = DivText.toLowerCase();
i = -1;
}
}
}
}
return
newText;
}
function
highlightSearchTerms(searchText, divId, treatAsPhrase, warnOnFailure, highlightStartTag, highlightEndTag) {
debugger
;
if
(treatAsPhrase) {
searchArray = [searchText];
}
else
{
searchArray = searchText.split(
" "
);
}
var
div=document.getElementById(divId);
if
(!div ||
typeof
(div.innerHTML) ==
"undefined"
) {
if
(warnOnFailure) {
alert(
"Sorry, for some reason the text of this page is unavailable. Searching will not work."
);
}
return
false
;
}
var
DivText = div.innerHTML;
for
(
var
i = 0; i < searchArray.length; i++) {
DivText = doHighlight(DivText, searchArray[i], highlightStartTag, highlightEndTag);
}
div.innerHTML = DivText;
return
true
;
}
function
searchPrompt(defaultSearchText, divId, isPrompt, treatAsPhrase, textColor, bgColor) {
debugger
;
if
((!textColor) || (!bgColor)) {
highlightStartTag =
""
;
highlightEndTag =
""
;
}
else
{
highlightStartTag =
"<font style='color:"
+ textColor +
"; background-color:"
+ bgColor +
";'>"
;
highlightEndTag =
"</font>"
;
}
return
highlightSearchTerms(searchTxt.value, divId,
false
,
true
, highlightStartTag, highlightEndTag);
}
</script>
</head>
<body>
<form id=
"form1"
runat=
"server"
>
<div>
<asp:FileUpload ID=
"FileUpload1"
runat=
"server"
/>
<asp:Button ID=
"btnUpload"
runat=
"server"
Text=
"submit"
OnClick=
"btnUpload_Click"
/>
<div></div>
</div>
<div>
<asp:TextBox ID=
"searchTxt"
runat=
"server"
Width=
"300px"
Height=
"25px"
Font-Size=
"Medium"
></asp:TextBox>
<input type=
"button"
value=
"Search"
onclick=
"return searchPrompt('search text', 'dvWord', false, true, 'red', 'orange')"
/>
</div>
<div id=
"dvWord"
runat=
"server"
></div>
</form>
</body>
protected
void
btnUpload_Click(
object
sender, EventArgs e)
{
object
documentFormat = 8;
string
randomName = DateTime.Now.Ticks.ToString();
object
htmlFilePath = Server.MapPath(
"~/Temp/"
) + randomName +
".htm"
;
string
directoryPath = Server.MapPath(
"~/Temp/"
) + randomName +
"_files"
;
object
fileSavePath = Server.MapPath(
"~/Temp/"
) + Path.GetFileName(FileUpload1.PostedFile.FileName);
string
ext = System.IO.Path.GetExtension(
this
.FileUpload1.PostedFile.FileName);
//If Directory not present, create it.
if
(!Directory.Exists(Server.MapPath(
"~/Temp/"
)))
{
Directory.CreateDirectory(Server.MapPath(
"~/Temp/"
));
}
//Upload the word document and save to Temp folder.
FileUpload1.PostedFile.SaveAs(fileSavePath.ToString());
//Open the word document in background.
_Application applicationclass =
new
Application();
applicationclass.Documents.Open(
ref
fileSavePath);
applicationclass.Visible =
false
;
Document document = applicationclass.ActiveDocument;
//Save the word document as HTML file.
document.SaveAs(
ref
htmlFilePath,
ref
documentFormat);
//Close the word document.
document.Close();
//Read the saved Html File.
string
wordHTML = System.IO.File.ReadAllText(htmlFilePath.ToString());
//Loop and replace the Image Path.
foreach
(Match match
in
Regex.Matches(wordHTML,
"<v:imagedata.+?src=[\"'](.+?)[\"'].*?>"
, RegexOptions.IgnoreCase))
{
wordHTML = Regex.Replace(wordHTML, match.Groups[1].Value,
"Temp/"
+ match.Groups[1].Value);
}
dvWord.InnerHtml = wordHTML;
}
Can anyone guide me here.
Thank you in advance!!
Reply
Answers (
4
)
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