MAPI works on one x64 System but not another
I want to send E-Mails via MAPI. On one Windows Server 2008 R2 x64 it works fine. I tried the same Code on a Windows Server 2012 R2 x64 there I always get the following Exception:
System.OverflowException: Arithmetic operation resulted in an overflow.
at System.IntPtr.op_Explicit(IntPtr value)
The Code looks like this:
IntPtr GetRecipients(out int recipCount)
{
recipCount = 0;
if (m_recipients.Count == 0)
return IntPtr.Zero;
int size = Marshal.SizeOf(typeof(MapiRecipDesc));
IntPtr intPtr = Marshal.AllocHGlobal(m_recipients.Count * size);
int ptr = (int)intPtr;
foreach (MapiRecipDesc mapiDesc in m_recipients)
{
Marshal.StructureToPtr(mapiDesc, (IntPtr)ptr, false);
ptr += size;
}
recipCount = m_recipients.Count;
return intPtr;
}
This line:
IntPtr intPtr = Marshal.AllocHGlobal(m_recipients.Count * size);
is where the Error occurs.
size = 40 and m_recipients.Count = 1.
Why does it work on one System but not another?
c# mapi
add a comment |
I want to send E-Mails via MAPI. On one Windows Server 2008 R2 x64 it works fine. I tried the same Code on a Windows Server 2012 R2 x64 there I always get the following Exception:
System.OverflowException: Arithmetic operation resulted in an overflow.
at System.IntPtr.op_Explicit(IntPtr value)
The Code looks like this:
IntPtr GetRecipients(out int recipCount)
{
recipCount = 0;
if (m_recipients.Count == 0)
return IntPtr.Zero;
int size = Marshal.SizeOf(typeof(MapiRecipDesc));
IntPtr intPtr = Marshal.AllocHGlobal(m_recipients.Count * size);
int ptr = (int)intPtr;
foreach (MapiRecipDesc mapiDesc in m_recipients)
{
Marshal.StructureToPtr(mapiDesc, (IntPtr)ptr, false);
ptr += size;
}
recipCount = m_recipients.Count;
return intPtr;
}
This line:
IntPtr intPtr = Marshal.AllocHGlobal(m_recipients.Count * size);
is where the Error occurs.
size = 40 and m_recipients.Count = 1.
Why does it work on one System but not another?
c# mapi
2
Not so sure you identified the correct statement, the MarshalAlloc call has no IntPtr cast. I'd need the exception stack trace to make the call. But the casts to/from int are certainly not safe. That can easily bomb on a 64-bit operating system. A 32-bit program can have a 4 gigabyte address space, a 64-bit program will allocate at high addresses on recent Windows versions. Use IntPtr.Add() instead.
– Hans Passant
Nov 19 '18 at 17:49
You're right the problem was the line int ptr = (int)intPtr; I had to change it to long and it worked.
– E-Nuff
Nov 20 '18 at 7:27
add a comment |
I want to send E-Mails via MAPI. On one Windows Server 2008 R2 x64 it works fine. I tried the same Code on a Windows Server 2012 R2 x64 there I always get the following Exception:
System.OverflowException: Arithmetic operation resulted in an overflow.
at System.IntPtr.op_Explicit(IntPtr value)
The Code looks like this:
IntPtr GetRecipients(out int recipCount)
{
recipCount = 0;
if (m_recipients.Count == 0)
return IntPtr.Zero;
int size = Marshal.SizeOf(typeof(MapiRecipDesc));
IntPtr intPtr = Marshal.AllocHGlobal(m_recipients.Count * size);
int ptr = (int)intPtr;
foreach (MapiRecipDesc mapiDesc in m_recipients)
{
Marshal.StructureToPtr(mapiDesc, (IntPtr)ptr, false);
ptr += size;
}
recipCount = m_recipients.Count;
return intPtr;
}
This line:
IntPtr intPtr = Marshal.AllocHGlobal(m_recipients.Count * size);
is where the Error occurs.
size = 40 and m_recipients.Count = 1.
Why does it work on one System but not another?
c# mapi
I want to send E-Mails via MAPI. On one Windows Server 2008 R2 x64 it works fine. I tried the same Code on a Windows Server 2012 R2 x64 there I always get the following Exception:
System.OverflowException: Arithmetic operation resulted in an overflow.
at System.IntPtr.op_Explicit(IntPtr value)
The Code looks like this:
IntPtr GetRecipients(out int recipCount)
{
recipCount = 0;
if (m_recipients.Count == 0)
return IntPtr.Zero;
int size = Marshal.SizeOf(typeof(MapiRecipDesc));
IntPtr intPtr = Marshal.AllocHGlobal(m_recipients.Count * size);
int ptr = (int)intPtr;
foreach (MapiRecipDesc mapiDesc in m_recipients)
{
Marshal.StructureToPtr(mapiDesc, (IntPtr)ptr, false);
ptr += size;
}
recipCount = m_recipients.Count;
return intPtr;
}
This line:
IntPtr intPtr = Marshal.AllocHGlobal(m_recipients.Count * size);
is where the Error occurs.
size = 40 and m_recipients.Count = 1.
Why does it work on one System but not another?
c# mapi
c# mapi
edited Nov 19 '18 at 15:54
asked Nov 19 '18 at 15:48
E-Nuff
10716
10716
2
Not so sure you identified the correct statement, the MarshalAlloc call has no IntPtr cast. I'd need the exception stack trace to make the call. But the casts to/from int are certainly not safe. That can easily bomb on a 64-bit operating system. A 32-bit program can have a 4 gigabyte address space, a 64-bit program will allocate at high addresses on recent Windows versions. Use IntPtr.Add() instead.
– Hans Passant
Nov 19 '18 at 17:49
You're right the problem was the line int ptr = (int)intPtr; I had to change it to long and it worked.
– E-Nuff
Nov 20 '18 at 7:27
add a comment |
2
Not so sure you identified the correct statement, the MarshalAlloc call has no IntPtr cast. I'd need the exception stack trace to make the call. But the casts to/from int are certainly not safe. That can easily bomb on a 64-bit operating system. A 32-bit program can have a 4 gigabyte address space, a 64-bit program will allocate at high addresses on recent Windows versions. Use IntPtr.Add() instead.
– Hans Passant
Nov 19 '18 at 17:49
You're right the problem was the line int ptr = (int)intPtr; I had to change it to long and it worked.
– E-Nuff
Nov 20 '18 at 7:27
2
2
Not so sure you identified the correct statement, the MarshalAlloc call has no IntPtr cast. I'd need the exception stack trace to make the call. But the casts to/from int are certainly not safe. That can easily bomb on a 64-bit operating system. A 32-bit program can have a 4 gigabyte address space, a 64-bit program will allocate at high addresses on recent Windows versions. Use IntPtr.Add() instead.
– Hans Passant
Nov 19 '18 at 17:49
Not so sure you identified the correct statement, the MarshalAlloc call has no IntPtr cast. I'd need the exception stack trace to make the call. But the casts to/from int are certainly not safe. That can easily bomb on a 64-bit operating system. A 32-bit program can have a 4 gigabyte address space, a 64-bit program will allocate at high addresses on recent Windows versions. Use IntPtr.Add() instead.
– Hans Passant
Nov 19 '18 at 17:49
You're right the problem was the line int ptr = (int)intPtr; I had to change it to long and it worked.
– E-Nuff
Nov 20 '18 at 7:27
You're right the problem was the line int ptr = (int)intPtr; I had to change it to long and it worked.
– E-Nuff
Nov 20 '18 at 7:27
add a comment |
1 Answer
1
active
oldest
votes
After some additional debugging I saw that Hans Passant was right. The line that was the problem was:
int ptr = (int)intPtr;
I had to change to long
and it worked
long ptr = (long)intPtr;
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53378217%2fmapi-works-on-one-x64-system-but-not-another%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
After some additional debugging I saw that Hans Passant was right. The line that was the problem was:
int ptr = (int)intPtr;
I had to change to long
and it worked
long ptr = (long)intPtr;
add a comment |
After some additional debugging I saw that Hans Passant was right. The line that was the problem was:
int ptr = (int)intPtr;
I had to change to long
and it worked
long ptr = (long)intPtr;
add a comment |
After some additional debugging I saw that Hans Passant was right. The line that was the problem was:
int ptr = (int)intPtr;
I had to change to long
and it worked
long ptr = (long)intPtr;
After some additional debugging I saw that Hans Passant was right. The line that was the problem was:
int ptr = (int)intPtr;
I had to change to long
and it worked
long ptr = (long)intPtr;
answered Nov 21 '18 at 8:00
E-Nuff
10716
10716
add a comment |
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53378217%2fmapi-works-on-one-x64-system-but-not-another%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
2
Not so sure you identified the correct statement, the MarshalAlloc call has no IntPtr cast. I'd need the exception stack trace to make the call. But the casts to/from int are certainly not safe. That can easily bomb on a 64-bit operating system. A 32-bit program can have a 4 gigabyte address space, a 64-bit program will allocate at high addresses on recent Windows versions. Use IntPtr.Add() instead.
– Hans Passant
Nov 19 '18 at 17:49
You're right the problem was the line int ptr = (int)intPtr; I had to change it to long and it worked.
– E-Nuff
Nov 20 '18 at 7:27