How to Enumerate StringBuilder object with null character as delimiter between strings

How to Enumerate StringBuilder object with null character as delimiter between strings

• KAllbritain

  Whoa!  After even more searching with ubiquitious search terms, I finally discovered the solution!  The solution is to use IntPtr as the return value and then get the pointed strings one at a time and incrementing the pointer until we cannot find anymore strings.  The details are at this link.  Hopefully this way someone else would have to search a few hours less! :D

  http://www.dotnet247.com/247reference/msgs/12/63214.aspx

  
  

• Sushisource

  It's the CLR marshaler that cuts the string at the first null character. If you change the type from StringBuilder to char[] you should get the entire buffer back.

  
  
  

• leoku

  All,

  I have a similar situation.  In my case it is a return value from a function that I am trying to run.  The returned string is supposed to be a set of null-delimited string values finally finished off with an additional null.  i.e. Value1<null>Value2<null>Value3<null><null>  Unfortunately, using Byte[] or char[] does not work for me.

  The call is to an application API (DataStage 7.5.1a to be exact so if you know there is a .NET API wrapper for DataStage API, that would be even better :D) and the API documentation is not correct so I do not know the exact type that they used for the return value.  They copied and pasted another method's structure and forgot to update it.  Evil copy-paste!  In another online post I found someone saying the return is a char* but I'm not 100% sure.  Anyway, so I tried StringBuilder and string, both of which return only the first value.  If I use Byte[] or char[], I get an exception stating:  "Cannot marshal 'return value': Invalid managed/unmanaged type combination."

  Any help would be greatly appreciated!

  T.

  
  

• Andy Jarvis

  thanks.

  i changed StringBuilder to Byte[]. its working

  regards

  ranu

  
  

• HopeDreamsComeTrue

  thanks for your reply.

  the code i used is as follows

  **************///code for importing GetPrivateProfileSection() method///**************************

  [DllImport("kernel32")]

  private static extern int GetPrivateProfileString(string section,

  string key, string def, StringBuilder retVal,

  int size, string filePath);

  **************///code for reading .ini file //**************************

  StringBuilder temp = new StringBuilder(1024);

  int i = GetPrivateProfileString("exch2000-gate", null, "", temp,

  1024, "C:\\randhir\\fpadmin\\FPUserList.ini");

  string str = temp.ToString();

  my aim is to enumerate key names of a specified section "exch2000-gate". in my above code temp is stringbuilder conating of all key value names. you may advise to use GetPrivateProfileSection() method to retrieve key names and their values. but by giving "null" as a second parameter i can enumerate key names to a specified buffer temp.

  i reffered the following link for my code.

  http://msdn2.microsoft.com/en-us/library/ms724353.aspx

  thanks and regards

  ranadheer.

  
  

• werwin

  Is the string returned from a call to native code
  
  

• Manoj G

  and the code is to be executed when the window form is loaded.

  i used the code in the following method

  private void Form1_Load(object sender, EventArgs e)

  
  

• hungryghost

  Hi,

  Can you please post the code that you are using

  Greetz,

  Geert

  Geert Verhoeven
  Consultant @ Ausy Belgium

  My Personal Blog

  
  
  
• How to Enumerate StringBuilder object with null character as delimiter between strings