substitute img when EVAL file name is not found

[Keith G Hicks]

I'm hoping there's a simple way to do this. I need to show a dummy image in
an asp image object if the file is missing. Here's my asp.net 2.0 markup:

<asp:Image ID="imgGrad" runat="server" BorderColor="Di mGray"
BorderStyle="So lid" BorderWidth="1p x" Height="120px" ImageUrl='<%#
"~/Images/ClassmatePics/" & Eval("GradPhoto FileName") %>' ToolTip="Click to
enlarge" /></td>
"GradPhotoFileN ame" is stored in a field in a table. If the file name stored
in the table is "JeffJones. jpg" but there is no "JeffJones. jpg" file in the
"~/Images/ClassmatePics/" folder then I have a dummy jpg image that I want
to show ("MissingPhoto. jpg").

I'm hoping there's an easy way to do that maybe in the EVAL code but I don't
know how. Can someone help me out?

Thanks,

Keith

[Peter Bromberg [C# MVP]]

Probably the easiest way is to call a protected method that accepts type
object (e.g., Eval("GradPhoto FileName") ) -- and returns the proper string
url to the image, or the alternate image url.
--Peter
"Keith G Hicks" <kr*@comcast.ne twrote in message
news:eZ******** ******@TK2MSFTN GP05.phx.gbl...

I'm hoping there's a simple way to do this. I need to show a dummy image
in
an asp image object if the file is missing. Here's my asp.net 2.0 markup:

<asp:Image ID="imgGrad" runat="server" BorderColor="Di mGray"
BorderStyle="So lid" BorderWidth="1p x" Height="120px" ImageUrl='<%#
"~/Images/ClassmatePics/" & Eval("GradPhoto FileName") %>' ToolTip="Click
to
enlarge" /></td>
"GradPhotoFileN ame" is stored in a field in a table. If the file name
stored
in the table is "JeffJones. jpg" but there is no "JeffJones. jpg" file in
the
"~/Images/ClassmatePics/" folder then I have a dummy jpg image that I want
to show ("MissingPhoto. jpg").

I'm hoping there's an easy way to do that maybe in the EVAL code but I
don't
know how. Can someone help me out?

Thanks,

Keith

[Keith G Hicks]

I appreciate the hint but being pretty new to all of this (asp.net) I have
no idea how to go about doing that. I'm fine with VB and can create subs and
functions just fine so if that's what you mean I can do that part I guess
but implementing it in my markup below is not remotely clear to me. I need
as much help as possible.

THanks,

Keith

"Peter Bromberg [C# MVP]" <pb*******@nosp ammaam.yahoo.co mwrote in message
news:30******** *************** ***********@mic rosoft.com...

Probably the easiest way is to call a protected method that accepts type
object (e.g., Eval("GradPhoto FileName") ) -- and returns the proper

string

url to the image, or the alternate image url.
--Peter
"Keith G Hicks" <kr*@comcast.ne twrote in message
news:eZ******** ******@TK2MSFTN GP05.phx.gbl...

I'm hoping there's a simple way to do this. I need to show a dummy image
in
an asp image object if the file is missing. Here's my asp.net 2.0

markup:

<asp:Image ID="imgGrad" runat="server" BorderColor="Di mGray"
BorderStyle="So lid" BorderWidth="1p x" Height="120px" ImageUrl='<%#
"~/Images/ClassmatePics/" & Eval("GradPhoto FileName") %>' ToolTip="Click
to
enlarge" /></td>
"GradPhotoFileN ame" is stored in a field in a table. If the file name
stored
in the table is "JeffJones. jpg" but there is no "JeffJones. jpg" file in
the
"~/Images/ClassmatePics/" folder then I have a dummy jpg image that I

want

to show ("MissingPhoto. jpg").

I'm hoping there's an easy way to do that maybe in the EVAL code but I
don't
know how. Can someone help me out?

Thanks,

Keith

[S.M. Altaf [MVP]]

Do this from the codebehind. You have the value of "GradPhotoFileN ame", you
can check if System.Io.File. Exists() and if it doesn't, set the .ImageUrl
property of your imgGrad image to your dummy image URL. I do not know how
you're binding your image to the data though, but how you assign the values
in the codebehind will depend on the method you're using.

--
---------------------------------------------------
S.M. Altaf [MVP]
http://www.mendhak.com/
"Keith G Hicks" <kr*@comcast.ne twrote in message
news:#m******** ******@TK2MSFTN GP04.phx.gbl...

I appreciate the hint but being pretty new to all of this (asp.net) I have
no idea how to go about doing that. I'm fine with VB and can create subs
and
functions just fine so if that's what you mean I can do that part I guess
but implementing it in my markup below is not remotely clear to me. I need
as much help as possible.

THanks,

Keith

"Peter Bromberg [C# MVP]" <pb*******@nosp ammaam.yahoo.co mwrote in
message
news:30******** *************** ***********@mic rosoft.com...

>Probably the easiest way is to call a protected method that accepts type
object (e.g., Eval("GradPhoto FileName") ) -- and returns the proper

string

>url to the image, or the alternate image url.
--Peter
"Keith G Hicks" <kr*@comcast.ne twrote in message
news:eZ******* *******@TK2MSFT NGP05.phx.gbl.. .

I'm hoping there's a simple way to do this. I need to show a dummy
image
in
an asp image object if the file is missing. Here's my asp.net 2.0

markup:

>
<asp:Image ID="imgGrad" runat="server" BorderColor="Di mGray"
BorderStyle="So lid" BorderWidth="1p x" Height="120px" ImageUrl='<%#
"~/Images/ClassmatePics/" & Eval("GradPhoto FileName") %>'
ToolTip="Click
to
enlarge" /></td>
"GradPhotoFileN ame" is stored in a field in a table. If the file name
stored
in the table is "JeffJones. jpg" but there is no "JeffJones. jpg" file in
the
"~/Images/ClassmatePics/" folder then I have a dummy jpg image that I

want

to show ("MissingPhoto. jpg").

I'm hoping there's an easy way to do that maybe in the EVAL code but I
don't
know how. Can someone help me out?

Thanks,

Keith

[Keith G Hicks]

Here's what I've done so far:

The following markup for an asp:image is in an aspx file in my root folder:

<asp:Image runat="server" ID="imgGradLarg e" ImageUrl='<%#
imageFileToDisp lay("~/Images/ClassmatePics/", val("GradPhotoF ileName"))
%>'></asp:Image>

This VB.net code is in my App_Code folder in a file caled MyUtils.vb

Public Shared Function imageFileToDisp lay(ByVal imageFilePath As String,
ByVal imageFileName As String) As String
If System.IO.File. Exists(imageFil ePath & "/" & imageFileName) Then
imageFileToDisp lay = imageFilePath & "/" & imageFileName
Else
imageFileToDisp lay = imageFilePath & "/NoClassmatePic. jpg"
End If
End Function

I'm sure there's more wrong that I am not aware of but for starters I get
this error:

Compiler Error Message: BC30451: Name 'imageFileToDis play' is not declared.

If you are tempted to respond with "You need to declare
'imageFileToDis play'" then please don't respond. I need to know HOW to do
that in the aspx markup. I haven't found anything that explains how to do
that.

If you see anything else I need to correct, please feel free to be as
specific as possible.

I really need specific coding help. I'm a bit lost on this right now. Pseudo
code suggestions are not what I'm looking for. I need someone to either show
me (I'm still learning) how to corrrect the above code or at least point me
to a website that expains (with actual example code) how to do what I'm
trying to do.

Keith

"Keith G Hicks" <kr*@comcast.ne twrote in message
news:eZ******** ******@TK2MSFTN GP05.phx.gbl...

I'm hoping there's a simple way to do this. I need to show a dummy image

in

an asp image object if the file is missing. Here's my asp.net 2.0 markup:

<asp:Image ID="imgGrad" runat="server" BorderColor="Di mGray"
BorderStyle="So lid" BorderWidth="1p x" Height="120px" ImageUrl='<%#
"~/Images/ClassmatePics/" & Eval("GradPhoto FileName") %>' ToolTip="Click

to

enlarge" /></td>
"GradPhotoFileN ame" is stored in a field in a table. If the file name

stored

in the table is "JeffJones. jpg" but there is no "JeffJones. jpg" file in

the

"~/Images/ClassmatePics/" folder then I have a dummy jpg image that I want
to show ("MissingPhoto. jpg").

I'm hoping there's an easy way to do that maybe in the EVAL code but I

don't

know how. Can someone help me out?

Thanks,

Keith

[Keith G Hicks]

Ok, I moved my function into the codebehind file for the page as follows:

Protected Function imageFileToDisp lay(ByVal imageFilePath As String,
ByVal imageFileName As String) As String
If File.Exists(Res olveUrl(imageFi lePath) & imageFileName) Then
imageFileToDisp lay = imageFilePath & imageFileName
Else
imageFileToDisp lay = imageFilePath & "NoClassmatePic .jpg"
End If
End Function

and it runs without errors. The problem is that the
ResolveUrl(imag eFilePath) only returns part of the path like this:

/mysite/...

but I need

C:\Inetpub\wwwr oot\mysite\.... ..

What vb.net function will give me this?

Keith
"Keith G Hicks" <kr*@comcast.ne twrote in message
news:eI******** *****@TK2MSFTNG P02.phx.gbl...

Here's what I've done so far:

The following markup for an asp:image is in an aspx file in my root

folder:

>
<asp:Image runat="server" ID="imgGradLarg e" ImageUrl='<%#
imageFileToDisp lay("~/Images/ClassmatePics/", val("GradPhotoF ileName"))
%>'></asp:Image>

This VB.net code is in my App_Code folder in a file caled MyUtils.vb

Public Shared Function imageFileToDisp lay(ByVal imageFilePath As String,
ByVal imageFileName As String) As String
If System.IO.File. Exists(imageFil ePath & "/" & imageFileName) Then
imageFileToDisp lay = imageFilePath & "/" & imageFileName
Else
imageFileToDisp lay = imageFilePath & "/NoClassmatePic. jpg"
End If
End Function

I'm sure there's more wrong that I am not aware of but for starters I get
this error:

Compiler Error Message: BC30451: Name 'imageFileToDis play' is not

declared.

>
If you are tempted to respond with "You need to declare
'imageFileToDis play'" then please don't respond. I need to know HOW to do
that in the aspx markup. I haven't found anything that explains how to do
that.

If you see anything else I need to correct, please feel free to be as
specific as possible.

I really need specific coding help. I'm a bit lost on this right now.

Pseudo

code suggestions are not what I'm looking for. I need someone to either

show

me (I'm still learning) how to corrrect the above code or at least point

me

to a website that expains (with actual example code) how to do what I'm
trying to do.

Keith

"Keith G Hicks" <kr*@comcast.ne twrote in message
news:eZ******** ******@TK2MSFTN GP05.phx.gbl...

I'm hoping there's a simple way to do this. I need to show a dummy image

in

an asp image object if the file is missing. Here's my asp.net 2.0

markup:

<asp:Image ID="imgGrad" runat="server" BorderColor="Di mGray"
BorderStyle="So lid" BorderWidth="1p x" Height="120px" ImageUrl='<%#
"~/Images/ClassmatePics/" & Eval("GradPhoto FileName") %>' ToolTip="Click

to

enlarge" /></td>
"GradPhotoFileN ame" is stored in a field in a table. If the file name

stored

in the table is "JeffJones. jpg" but there is no "JeffJones. jpg" file in

the

"~/Images/ClassmatePics/" folder then I have a dummy jpg image that I

want

to show ("MissingPhoto. jpg").

I'm hoping there's an easy way to do that maybe in the EVAL code but I

don't

know how. Can someone help me out?

Thanks,

Keith

[David]

Hhhmmmm....

Not sure, but if your markup is calling imageFileToDisp lay, then you should
be able to change both of the imageFileToDisp lay in your IF and ELSE
statements to return... i.e.

return imageFilePath & "/NoClassmatePic. jpg"
--
Best regards,
Dave Colliver.
http://www.AshfieldFOCUS.com
~~
http://www.FOCUSPortals.com - Local franchises available
"Keith G Hicks" <kr*@comcast.ne twrote in message
news:eI******** *****@TK2MSFTNG P02.phx.gbl...

Here's what I've done so far:

The following markup for an asp:image is in an aspx file in my root
folder:

<asp:Image runat="server" ID="imgGradLarg e" ImageUrl='<%#
imageFileToDisp lay("~/Images/ClassmatePics/", val("GradPhotoF ileName"))
%>'></asp:Image>

This VB.net code is in my App_Code folder in a file caled MyUtils.vb

Public Shared Function imageFileToDisp lay(ByVal imageFilePath As String,
ByVal imageFileName As String) As String
If System.IO.File. Exists(imageFil ePath & "/" & imageFileName) Then
imageFileToDisp lay = imageFilePath & "/" & imageFileName
Else
imageFileToDisp lay = imageFilePath & "/NoClassmatePic. jpg"
End If
End Function

I'm sure there's more wrong that I am not aware of but for starters I get
this error:

Compiler Error Message: BC30451: Name 'imageFileToDis play' is not
declared.

If you are tempted to respond with "You need to declare
'imageFileToDis play'" then please don't respond. I need to know HOW to do
that in the aspx markup. I haven't found anything that explains how to do
that.

If you see anything else I need to correct, please feel free to be as
specific as possible.

I really need specific coding help. I'm a bit lost on this right now.
Pseudo
code suggestions are not what I'm looking for. I need someone to either
show
me (I'm still learning) how to corrrect the above code or at least point
me
to a website that expains (with actual example code) how to do what I'm
trying to do.

Keith

"Keith G Hicks" <kr*@comcast.ne twrote in message
news:eZ******** ******@TK2MSFTN GP05.phx.gbl...

>I'm hoping there's a simple way to do this. I need to show a dummy image

in

>an asp image object if the file is missing. Here's my asp.net 2.0 markup:

<asp:Image ID="imgGrad" runat="server" BorderColor="Di mGray"
BorderStyle="S olid" BorderWidth="1p x" Height="120px" ImageUrl='<%#
"~/Images/ClassmatePics/" & Eval("GradPhoto FileName") %>' ToolTip="Click

to

>enlarge" /></td>
"GradPhotoFile Name" is stored in a field in a table. If the file name

stored

>in the table is "JeffJones. jpg" but there is no "JeffJones. jpg" file in

the

>"~/Images/ClassmatePics/" folder then I have a dummy jpg image that I
want
to show ("MissingPhoto. jpg").

I'm hoping there's an easy way to do that maybe in the EVAL code but I

don't

>know how. Can someone help me out?

Thanks,

Keith

[David]

I have never used resolveurl, so not sure what it does. However, you should
probably look at Server.MapPath instead of resolveurl.
--
Best regards,
Dave Colliver.
http://www.AshfieldFOCUS.com
~~
http://www.FOCUSPortals.com - Local franchises available
"Keith G Hicks" <kr*@comcast.ne twrote in message
news:er******** ******@TK2MSFTN GP02.phx.gbl...

Ok, I moved my function into the codebehind file for the page as follows:

Protected Function imageFileToDisp lay(ByVal imageFilePath As String,
ByVal imageFileName As String) As String
If File.Exists(Res olveUrl(imageFi lePath) & imageFileName) Then
imageFileToDisp lay = imageFilePath & imageFileName
Else
imageFileToDisp lay = imageFilePath & "NoClassmatePic .jpg"
End If
End Function

and it runs without errors. The problem is that the
ResolveUrl(imag eFilePath) only returns part of the path like this:

/mysite/...

but I need

C:\Inetpub\wwwr oot\mysite\.... ..

What vb.net function will give me this?

Keith
"Keith G Hicks" <kr*@comcast.ne twrote in message
news:eI******** *****@TK2MSFTNG P02.phx.gbl...

>Here's what I've done so far:

The following markup for an asp:image is in an aspx file in my root

folder:

>>
<asp:Image runat="server" ID="imgGradLarg e" ImageUrl='<%#
imageFileToDis play("~/Images/ClassmatePics/", val("GradPhotoF ileName"))
%>'></asp:Image>

This VB.net code is in my App_Code folder in a file caled MyUtils.vb

Public Shared Function imageFileToDisp lay(ByVal imageFilePath As String,
ByVal imageFileName As String) As String
If System.IO.File. Exists(imageFil ePath & "/" & imageFileName) Then
imageFileToDisp lay = imageFilePath & "/" & imageFileName
Else
imageFileToDisp lay = imageFilePath & "/NoClassmatePic. jpg"
End If
End Function

I'm sure there's more wrong that I am not aware of but for starters I get
this error:

Compiler Error Message: BC30451: Name 'imageFileToDis play' is not

declared.

>>
If you are tempted to respond with "You need to declare
'imageFileToDi splay'" then please don't respond. I need to know HOW to do
that in the aspx markup. I haven't found anything that explains how to do
that.

If you see anything else I need to correct, please feel free to be as
specific as possible.

I really need specific coding help. I'm a bit lost on this right now.

Pseudo

>code suggestions are not what I'm looking for. I need someone to either

show

>me (I'm still learning) how to corrrect the above code or at least point

me

>to a website that expains (with actual example code) how to do what I'm
trying to do.

Keith

"Keith G Hicks" <kr*@comcast.ne twrote in message
news:eZ******* *******@TK2MSFT NGP05.phx.gbl.. .

I'm hoping there's a simple way to do this. I need to show a dummy
image

in

an asp image object if the file is missing. Here's my asp.net 2.0

markup:

>
<asp:Image ID="imgGrad" runat="server" BorderColor="Di mGray"
BorderStyle="So lid" BorderWidth="1p x" Height="120px" ImageUrl='<%#
"~/Images/ClassmatePics/" & Eval("GradPhoto FileName") %>'
ToolTip="Click

to

enlarge" /></td>
"GradPhotoFileN ame" is stored in a field in a table. If the file name

stored

in the table is "JeffJones. jpg" but there is no "JeffJones. jpg" file in

the

"~/Images/ClassmatePics/" folder then I have a dummy jpg image that I

want

to show ("MissingPhoto. jpg").

I'm hoping there's an easy way to do that maybe in the EVAL code but I

don't

know how. Can someone help me out?

Thanks,

Keith

[Keith G Hicks]

Well I got it working. So for anyone who ever has a similar question here's
what I ended up doing:

My code behind function is as follows (with Imports System.IO at the top of
the file):

Protected Function imageFileToDisp lay(ByVal imageFileName As String) As
String
If File.Exists(Sys tem.AppDomain.C urrentDomain.Ba seDirectory &
"Images\Classma tePics\" & imageFileName) Then
imageFileToDisp lay = "~/Images/ClassmatePics/" & imageFileName
Else
imageFileToDisp lay = "~/Images/ClassmatePics/NoClassmatePic. jpg"
End If
End Function

System.AppDomai n.CurrentDomain .BaseDirectory is getting the entire path of
the site's root (C:\Inetpub\www root\mySite for example). I suppose I could
have passed the path from the aspx file to the code behind but it's 6 of
one, 1/2 dozen of the other IMO. I didn't use ResolveURL because that
doesn't give the the whole base path.

My markup in the aspx page is as follows:

<asp:Image ID="imgGrad" runat="server" BorderColor="Da rkGray"
BorderStyle="So lid" BorderWidth="1p x" Height="130px" ImageUrl='<%#
imageFileToDisp lay(Eval("GradP hotoFileName")) %>' ToolTip="Click to enlarge"
/>

it all works perfectly fine.

Keith

[Peter Bromberg [C# MVP]]

Probably Server.MapPath( "relativepathto image") would do the trick for you.
Peter

"Keith G Hicks" <kr*@comcast.ne twrote in message
news:eQ******** ******@TK2MSFTN GP06.phx.gbl...

Well I got it working. So for anyone who ever has a similar question
here's
what I ended up doing:

My code behind function is as follows (with Imports System.IO at the top
of
the file):

Protected Function imageFileToDisp lay(ByVal imageFileName As String) As
String
If File.Exists(Sys tem.AppDomain.C urrentDomain.Ba seDirectory &
"Images\Classma tePics\" & imageFileName) Then
imageFileToDisp lay = "~/Images/ClassmatePics/" & imageFileName
Else
imageFileToDisp lay =
"~/Images/ClassmatePics/NoClassmatePic. jpg"
End If
End Function

System.AppDomai n.CurrentDomain .BaseDirectory is getting the entire path of
the site's root (C:\Inetpub\www root\mySite for example). I suppose I could
have passed the path from the aspx file to the code behind but it's 6 of
one, 1/2 dozen of the other IMO. I didn't use ResolveURL because that
doesn't give the the whole base path.

My markup in the aspx page is as follows:

<asp:Image ID="imgGrad" runat="server" BorderColor="Da rkGray"
BorderStyle="So lid" BorderWidth="1p x" Height="130px" ImageUrl='<%#
imageFileToDisp lay(Eval("GradP hotoFileName")) %>' ToolTip="Click to
enlarge"
/>

it all works perfectly fine.

Keith