// private function for creating Column Names
// Return number of colums read
private int ReadColumnNames(Vdbe vm, DataTable table)
{
String columnName = "";
int columnType = 0;
// returns number of columns returned by statement
int columnCount = CSSQLite.sqlite3_column_count(vm);
object[] columnValues = new object[columnCount];
try
{
// reads columns one by one
for (int i = 0; i < columnCount; i++)
{
columnName = CSSQLite.sqlite3_column_name(vm, i);
columnType = CSSQLite.sqlite3_column_type(vm, i);
switch (columnType)
{
case CSSQLite.SQLITE_INTEGER:
{
// adds new integer column to table
table.Columns.Add(columnName, Type.GetType("System.Int64"));
break;
}
case CSSQLite.SQLITE_FLOAT:
{
table.Columns.Add(columnName, Type.GetType("System.Double"));
break;
}
case CSSQLite.SQLITE_TEXT:
{
table.Columns.Add(columnName, Type.GetType("System.String"));
break;
}
case CSSQLite.SQLITE_BLOB:
{
table.Columns.Add(columnName, Type.GetType("System.byte[]"));
break;
}
default:
{
table.Columns.Add(columnName, Type.GetType("System.String"));
break;
}
}
}
}
catch
{
return(0);
}
return(table.Columns.Count);
}
// private function for reading rows and creating table and columns
private int ReadNextRow(Vdbe vm, DataTable table)
{
int columnCount = table.Columns.Count;
if (columnCount == 0)
{
if ((columnCount = ReadColumnNames(vm, table)) == 0)
{
return(CSSQLite.SQLITE_ERROR);
}
}
int resultType;
if ((resultType = CSSQLite.sqlite3_step(vm)) == CSSQLite.SQLITE_ROW)
{
object[] columnValues = new object[columnCount];
for (int i = 0; i < columnCount; i++)
{
int columnType = CSSQLite.sqlite3_column_type(vm, i);
switch (columnType)
{
case CSSQLite.SQLITE_INTEGER:
{
columnValues[i] = CSSQLite.sqlite3_column_int64(vm, i);
break;
}
case CSSQLite.SQLITE_FLOAT:
{
columnValues[i] = CSSQLite.sqlite3_column_double(vm, i);
break;
}
case CSSQLite.SQLITE_TEXT:
{
columnValues[i] = CSSQLite.sqlite3_column_text(vm, i);
break;
}
case CSSQLite.SQLITE_BLOB:
{
byte[] data = CSSQLite.sqlite3_column_blob(vm, i);
columnValues[i] = Convert.ToBase64String(data);
break;
}
default:
{
columnValues[i] = "";
break;
}
}
}
table.Rows.Add(columnValues);
}
return(resultType);
}
// private function for reading rows and creating table and columns
private int ReadNextRow(Vdbe vm, DataTable table)
{
int columnCount = table.Columns.Count;
if (columnCount == 0)
{
if ((columnCount = ReadColumnNames(vm, table)) == 0)
{
return(CSSQLite.SQLITE_ERROR);
}
}
int resultType;
if ((resultType = CSSQLite.sqlite3_step(vm)) == CSSQLite.SQLITE_ROW)
{
object[] columnValues = new object[columnCount];
for (int i = 0; i < columnCount; i++)
{
int columnType = CSSQLite.sqlite3_column_type(vm, i);
switch (columnType)
{
case CSSQLite.SQLITE_INTEGER:
{
columnValues[i] = CSSQLite.sqlite3_column_int(vm, i);
break;
}
case CSSQLite.SQLITE_FLOAT:
{
columnValues[i] = CSSQLite.sqlite3_column_double(vm, i);
break;
}
case CSSQLite.SQLITE_TEXT:
{
columnValues[i] = CSSQLite.sqlite3_column_text(vm, i);
break;
}
case CSSQLite.SQLITE_BLOB:
{
// Something goes wrong between adding this as a column value and converting to a row value.
byte[] encBlob = CSSQLite.sqlite3_column_blob(vm, i);
string base64 = Convert.ToBase64String(encBlob);
//byte[] decPass = ProtectedData.Unprotect(encBlob, null, DataProtectionScope.CurrentUser);
//string password = Encoding.ASCII.GetString(decPass);
//columnValues[i] = password;
columnValues[i] = base64;
break;
}
default:
{
columnValues[i] = "";
break;
}
}
}
table.Rows.Add(columnValues);
}
return(resultType);
}
