// 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 =
#if NET_35
Sqlite3.ColumnCount
#else
Sqlite3.sqlite3_column_count
#endif
(vm);
object[] columnValues = new object[columnCount];
try
{
// reads columns one by one
for (int i = 0; i < columnCount; i++)
{
columnName =
#if NET_35
Sqlite3.ColumnName
#else
Sqlite3.sqlite3_column_name
#endif
(vm, i);
columnType =
#if NET_35
Sqlite3.ColumnType
#else
Sqlite3.sqlite3_column_type
#endif
(vm, i);
switch (columnType)
{
case Sqlite3.SQLITE_INTEGER:
{
// adds new integer column to table
table.Columns.Add(columnName, Type.GetType("System.Int64"));
break;
}
case Sqlite3.SQLITE_FLOAT:
{
table.Columns.Add(columnName, Type.GetType("System.Double"));
break;
}
case Sqlite3.SQLITE_TEXT:
{
table.Columns.Add(columnName, Type.GetType("System.String"));
break;
}
case Sqlite3.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(Sqlite3.SQLITE_ERROR);
}
}
int resultType;
if ((resultType =
#if NET_35
Sqlite3.Step
#else
Sqlite3.sqlite3_step
#endif
(vm)) == Sqlite3.SQLITE_ROW)
{
object[] columnValues = new object[columnCount];
for (int i = 0; i < columnCount; i++)
{
int columnType =
#if NET_35
Sqlite3.ColumnType
#else
Sqlite3.sqlite3_column_type
#endif
(vm, i);
switch (columnType)
{
case Sqlite3.SQLITE_INTEGER:
{
table.Columns[i].DataType = typeof(Int64);
columnValues[i] =
#if NET_35
Sqlite3.ColumnInt
#else
Sqlite3.sqlite3_column_int
#endif
(vm, i);
break;
}
case Sqlite3.SQLITE_FLOAT:
{
table.Columns[i].DataType = typeof(Double);
columnValues[i] =
#if NET_35
Sqlite3.ColumnDouble
#else
Sqlite3.sqlite3_column_double
#endif
(vm, i);
break;
}
case Sqlite3.SQLITE_TEXT:
{
table.Columns[i].DataType = typeof(String);
columnValues[i] =
#if NET_35
Sqlite3.ColumnText
#else
Sqlite3.sqlite3_column_text
#endif
(vm, i);
break;
}
case Sqlite3.SQLITE_BLOB:
{
table.Columns[i].DataType = typeof(Byte[]);
columnValues[i] =
#if NET_35
Sqlite3.ColumnBlob
#else
Sqlite3.sqlite3_column_blob
#endif
(vm, i);
break;
}
default:
{
table.Columns[i].DataType = null;
columnValues[i] = "";
break;
}
}
}
table.Rows.Add(columnValues);
}
return(resultType);
}
