Mixing
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
asked Nov 19 '18 at 15:48
E-Nuff
10716
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
asked Nov 19 '18 at 15:48
E-Nuff
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 |
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
asked Nov 19 '18 at 15:48
E-Nuff
10716
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
asked Nov 19 '18 at 15:48
E-Nuff
10716
asked Nov 19 '18 at 15:48
E-Nuff
10716
edited Nov 19 '18 at 15:54
asked Nov 19 '18 at 15:48
E-Nuff
10716
asked Nov 19 '18 at 15:48
E-Nuff
10716
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
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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;
answered Nov 21 '18 at 8:00
E-Nuff
10716
add a comment |
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1 Answer
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1 Answer
1
active
oldest
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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;
answered Nov 21 '18 at 8:00
E-Nuff
10716
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;
answered Nov 21 '18 at 8:00
E-Nuff
10716
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;
answered Nov 21 '18 at 8:00
E-Nuff
10716
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
answered Nov 21 '18 at 8:00
E-Nuff
10716
answered Nov 21 '18 at 8:00
E-Nuff
10716
answered Nov 21 '18 at 8:00
E-Nuff
10716
10716
add a comment |
add a comment |
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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