cannot convert from 'string' to 'ref string'

[Guest]

I have an activeX dll, I am calling one function from that
dll. I am using C# as coding language. I am getting
following error.
cannot convert from 'string' to 'ref string'
How do I call this function ?.

My statement is like this
CustomOutVal = CustObj.Authenticate(txtUserName.Text,
pass , Domain );

Regards,
Kishor

 

[Guest]

hi
try passing the strings as ref to the function

check this article
http://www.codeproject.com/dotnet/cominterop.asp

regards
ansil

 

[Jon Skeet [C# MVP]]

I have an activeX dll, I am calling one function from that
dll. I am using C# as coding language. I am getting
following error.
cannot convert from 'string' to 'ref string'
How do I call this function ?.

By specifiying the parameter as "ref" as well.

See http://www.pobox.com/~skeet/csharp/parameters.html

 

[Guest]

Which of the parameters is supposed to be passed by ref?? If it is the first
parameter (txtUserName.Text) then you will need to create another string
variable, set it = to txtUserName.text and pass that into the call. The
reason for this is that properties cannot be used as reference parameters..

To top this off, when calling a method that has a ref parameter, specify the
ref keyword..

an example would be (if the first parameter is the ref parameter):
string tempUserName = txtUserName.Text;
CustomOutVal = CustObj.Authenticate(ref tmpUserName,
pass , Domain );

Hope this helps

Eddie de Bear

 

[Guest]

Thanks,
problem solved

Kishor

Which of the parameters is supposed to be passed by ref?? If it is the first
parameter (txtUserName.Text) then you will need to create another string
variable, set it = to txtUserName.text and pass that into the call. The
reason for this is that properties cannot be used as reference parameters..

To top this off, when calling a method that has a ref parameter, specify the
ref keyword..

an example would be (if the first parameter is the ref parameter):
string tempUserName = txtUserName.Text;
CustomOutVal = CustObj.Authenticate(ref tmpUserName,
pass , Domain );

Hope this helps

Eddie de Bear