Hi,
I have a structure which I want to pass as a pointer to a C dll. The
problem is that C# adds '\0' character at the end of each string
(which is contained in the struct).
I understand that C# does it so that no null terminated strings are
passed but I want to pass the strings without the padding.
Example,
[StructLayout(LayoutKind.Sequential)]
public struct Name
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst= 6)]
public string LastName
};
Name nm = new Name();
nm.Lastname = "GEORGE";
Cfunction(ref nm); //here at the 'C' end the value of LastName becomes
// LastName[0] = 'G'
// LastName[1] = 'E'
// LastName[2] = 'O'
// LastName[3] = 'R'
// LastName[4] = 'G'
// LastName[5] = 0
Instead of '0' I want 'E' (basically no '\0' termination)
Is there any other way except increasing the size of LastName(which
would increase the size of struct)?
Thanks a lot,
Gaurav
************************** 2 2742
Hi,
inline
"GB" <ga************@yahoo.co.uk> wrote in message
news:d5**************************@posting.google.c om... Hi,
I have a structure which I want to pass as a pointer to a C dll. The problem is that C# adds '\0' character at the end of each string (which is contained in the struct).
I understand that C# does it so that no null terminated strings are passed but I want to pass the strings without the padding.
Example,
[StructLayout(LayoutKind.Sequential)] public struct Name { [MarshalAs(UnmanagedType.ByValTStr, SizeConst= 6)] public string LastName };
One way is to declare LastName as a character array:
[MarshalAs(UnmanagedType.ByValArray, SizeConst=6)]
public char[] LastName; Name nm = new Name(); nm.Lastname = "GEORGE";
would become:
nm.Lastname = "GEORGE".ToCharArray(0,6);
hth,
greetings Cfunction(ref nm); //here at the 'C' end the value of LastName becomes // LastName[0] = 'G' // LastName[1] = 'E' // LastName[2] = 'O' // LastName[3] = 'R' // LastName[4] = 'G' // LastName[5] = 0 Instead of '0' I want 'E' (basically no '\0' termination)
Is there any other way except increasing the size of LastName(which would increase the size of struct)?
Thanks a lot, Gaurav **************************
Hi,
inline
"GB" <ga************@yahoo.co.uk> wrote in message
news:d5**************************@posting.google.c om... Hi,
I have a structure which I want to pass as a pointer to a C dll. The problem is that C# adds '\0' character at the end of each string (which is contained in the struct).
I understand that C# does it so that no null terminated strings are passed but I want to pass the strings without the padding.
Example,
[StructLayout(LayoutKind.Sequential)] public struct Name { [MarshalAs(UnmanagedType.ByValTStr, SizeConst= 6)] public string LastName };
One way is to declare LastName as a character array:
[MarshalAs(UnmanagedType.ByValArray, SizeConst=6)]
public char[] LastName; Name nm = new Name(); nm.Lastname = "GEORGE";
would become:
nm.Lastname = "GEORGE".ToCharArray(0,6);
hth,
greetings Cfunction(ref nm); //here at the 'C' end the value of LastName becomes // LastName[0] = 'G' // LastName[1] = 'E' // LastName[2] = 'O' // LastName[3] = 'R' // LastName[4] = 'G' // LastName[5] = 0 Instead of '0' I want 'E' (basically no '\0' termination)
Is there any other way except increasing the size of LastName(which would increase the size of struct)?
Thanks a lot, Gaurav ************************** This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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