C # conversion from struct variable to byte [] variable

If you can convert the struct variable instance to the byte [] type, you can easily compress the variable storage. Below is a preliminary implementation of mine.

Using system. runtime. interopservices; # structure to be converted by region [structlayout (layoutkind. sequential, pack = 1)] // the alignment of the strutest variable in the memory (required for successful pointer type conversion) public struct strutest {public int intid; Public int intname; public datetime dtbegintime ;}# endregion /// <summary> /// Summary of xamconverter. Conversion between a specific structure variable and byte [] /// Author: Xam // Date: 2007-4-23 // note: apply convertion functions to deal with convertion between struct value and byte [] value; // </Summary> public class xamconverter {# region constructor public xamconverter () {// todo: add the constructor logic here //} # endregion # region method 1 forced conversion through pointer type # region structure variable to byte [] conversion // <summary> /// structure Variable to byte [] // </Summary> /// <Param name = "S"> Structure Variable </param> /// <returns> byte [] (allocated space) </returns> Public unsafe byte [] xamstructtobytes (strutest s) {byte [] arr = new byte [sizeof (strutest)]; fixed (byte * Parr = ARR) {* (strutest *) Parr) = s;} return arr ;} # endregion # conversion from Region byte [] to structural variables /// <summary> /// byte [] to conversion from structural variables /// </Summary> // <param name = "arr"> byte [] </param> // <returns> Structure Variable </returns> Public unsafe strutest xambytestostruct (byte [] ARR) {If (ARR. length <sizeof (strutest) throw new argumentexception (); strutest s; fixed (byte * Parr = ARR) {S = * (strutest *) Parr );} return s ;} # endregion # convert the region structure variable array to byte [] /// <summary> // convert the structure variable array to byte [] /// </Summary> // /<Param name = "S"> structure variable array </param> // <Param name = "tsize"> size of the structure variable array </param> // <returns> byte [] </returns> Public unsafe byte [] xamstructtobytes (strutest [] S, int tsize) {int I; byte [] arr = new byte [sizeof (strutest) * tsize]; for (I = 0; I <tsize; I ++) {fixed (byte * Parr = ARR) {(strutest *) Parr) [I]) = s [I] ;}} return arr ;} # endregion # conversion from Region byte [] to structure variable array // <summary> // byte [] to structure variable array // /<Param name = "arr"> byte [] </param> // <Param name = "tsize"> size of the array of Structure Variables contained in byte [] </Param >/// <returns> </returns> Public unsafe strutest [] xambytestostruct (byte [] arr, int tsize) {If (ARR. length <sizeof (strutest) * tsize) throw new argumentexception (); int I; strutest [] S = new strutest [tsize]; for (I = 0; I <tsize; I ++) {fixed (byte * Parr = ARR) {s [I] = (strutest *) Parr) [I]) ;}} return s ;} # endregion # region Mode 2 # conversion from Region Structure Variables to byte [] // <summary> // conversion from Structure Variables to byte [] /// </ summary> /// <Param name = "S"> Structure Variable </param> /// <returns> byte [] (allocated space) </returns> Public unsafe byte [] xamstructtobytesb (strutest s) {int size = marshal. sizeof (s); system. intptr = marshal. allochglobal (size); marshal. structuretoptr (S, PTR, true); byte [] BA = new byte [size]; marshal. copy (PTR, Ba, 0, ba. length); Return BA ;} # endregion # conversion from Region byte [] to structural variables /// <summary> /// byte [] to conversion from structural variables /// </Summary> // <param name = "arr"> byte [] </param> // <returns> Structure Variable </returns> Public unsafe strutest xambytestostructb (byte [] ARR) {strutest strureturn = new strutest (); int size = marshal. sizeof (strureturn); system. intptr = marshal. allochglobal (size); marshal. copy (ARR, 0, PTR, arr. length); strureturn = (strutest) Marshal. ptrtostructure (PTR, strureturn. getType (); Return strureturn ;} # endregion # convert the region structure variable array to byte [] /// <summary> // convert the structure variable array to byte [] /// </Summary> // /<Param name = "S"> structure variable array </param> // <Param name = "tsize"> size of the structure variable array </param> // <returns> byte [] </returns> Public unsafe byte [] xamstructtobytesb (strutest [] S, int tsize) {int I; int size = marshal. sizeof (s [0]) * s. length; system. intptr [] ptrs = new intptr [S. length]; for (I = 0; I <tsize; I ++) {ptrs [I] = marshal. allochglobal (size); marshal. structuretoptr (s [I], ptrs [I], true);} byte [] BA = new byte [size]; for (I = 0; I <tsize; I ++) {marshal. copy (ptrs [I], Ba, I * marshal. sizeof (s [0]), Marshal. sizeof (s [0]);} return BA ;} # endregion # conversion from Region byte [] to structure variable array // <summary> // byte [] to structure variable array // /<Param name = "arr"> byte [] </param> // <Param name = "tsize"> size of the array of Structure Variables contained in byte [] </Param >/// <returns> </returns> Public unsafe strutest [] xambytestostructb (byte [] arr, int tsize) {If (ARR. length <sizeof (strutest) * tsize) throw new argumentexception (); strutest [] strureturn = new strutest [tsize]; int intunitsize = marshal. sizeof (strureturn [0]); int size = intunitsize * tsize; int I; int inttemp; system. intptr [] ptrs = new intptr [tsize]; for (I = 0; I <tsize; I ++) {inttemp = I * intunitsize; ptrs [I] = marshal. allochglobal (size); marshal. copy (ARR, inttemp, ptrs [I], intunitsize); strureturn [I] = (strutest) Marshal. ptrtostructure (ptrs [I], strureturn [I]. getType ();} return strureturn;} # endregion}

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Demo

# Region structure array test xamconverter XC = new xamconverter (); strutest [] ST = new strutest [3]; ST [0]. intid = 1; ST [0]. intname = 12; ST [0]. dtbegintime = datetime. now; ST [2]. intid = 2; ST [2]. intname = 232; ST [2]. dtbegintime = datetime. now; byte [] inputbytes = XC. xamstructtobytesb (St, 3); strutest [] st2 = XC. xambytestostructb (inputbytes, 3); MessageBox. show (st2 [2]. dtbegintime. tostring () + "=" + st2 [2]. intname. tostring (); # endregion