I earlier blogged about scripting datetime values for INSERT statements, or for example by use in the SubmitSQL method of the SQL Server Compact RemoteDataAccess API. In this post, I will show how to serialize byte arrays as a hexadecimal string. Notice that for the SubmitSQL method, there is a limit to the size of the SQL statement (not sure what is is, but 64 K is a good guess, I think). So if you have large images, that you want to send to your server, you are out of luck with this method.
Below is the code I currently have implemented in my ExportSqlCE INSERT statement generator.if (dt.Columns[iColumn].DataType == typeof(Byte))
Byte buffer = (Byte)dt.Rows[iRow][iColumn];
for (int i = 0; i < buffer.Length; i++)
There is a long discussion on Stackoverflow on how to do this faster, the code below seems to be the fastest:
private static string ByteArrayToHex(byte barray)
char c = new char[barray.Length * 2];
for (int i = 0; i < barray.Length; ++i)
b = ((byte)(barray[i] >> 4));
c[i * 2] = (char)(b > 9 ? b + 0x37 : b + 0x30);
b = ((byte)(barray[i] & 0xF));
c[i * 2 + 1] = (char)(b > 9 ? b + 0x37 : b + 0x30);
return new string(c);
Maybe I should update my ExportSqlCe code? - Happy scripting!