public IndexFileNTX(Stream stream, DbfTable dbfTable, bool?skipDeleted = null, int indexPageCacheSize = 0)
: base(stream, dbfTable, skipDeleted, indexPageCacheSize) // 'stream', 'dbfTable' and 'skipDeleted' already stored by base class constructor
{
this.header = GetHeader(stream); // fill 'header' & IsStreamValid/Exception if error
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}
//
/// <summary>
/// Create a new DBF datafile.
/// Create() can't overwrite exists file - it's a precautionary measure.
/// </summary>
/// <param name="path">A not exists filename.</param>
/// <param name="columns">Definition of columns</param>
/// <param name="encoding">Encoding for open created file. -- It mean too, CodepageCodes of new file will OEM</param>
/// <returns></returns>
public static DbfTable Create(string path, IEnumerable <ColumnDefinitionForCreateTable> columns, Encoding encoding, DbfTableType tableType = DbfTableType.Undefined)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
if (columns == null)
{
throw new ArgumentNullException("columns");
}
//
var streamDBF = new FileStream(path, FileMode.CreateNew, FileAccess.ReadWrite, FileShare.None);
DbfTable dbfTable = CreateHeader_DBF(streamDBF, columns, tableType, CodepageCodes.OEM, encoding);
if (dbfTable.isExistsMemoField)
{
MemoFileType memoType = dbfTable.DefaultMemoFileFormatForDbf();
Stream streamMemo = CreateHeader_Memo(path, memoType);
dbfTable.JoinMemoStream(streamMemo, memoType);
}
return(dbfTable);
}
// http://stackoverflow.com/questions/1852837/is-there-a-generic-constructor-with-parameter-constraint-in-c
// http://stackoverflow.com/questions/700966/generic-type-in-constructor
public T Read <T>() where T : class, new() // new from 1.3 version
{
do
{
row_ = dbfTable.GetRow(nextRecNo, false); // Don't throw an exception, returns null if record not found
nextRecNo++;
} while (skipDeleted && (row_ != null) && row_.deleted);
return(DbfTable.Get <T>(row_));
}
public bool recNoOverflowException = true; //
internal ClipperReader(DbfTable dbfTable, bool skipDeleted)
{
if (dbfTable == null)
{
throw ExceptionFactory.CreateArgumentException("dbfTable", "null parameter");
}
this._dbfTable = dbfTable;
this.skipDeleted = skipDeleted;
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}
/// <summary>
/// Loads the DBF table into a <see cref="DataTable"/> with the default ASCII encoding.
/// </summary>
/// <param name="table">The DBF table to load.</param>
/// <returns>A <see cref="DataTable"/> loaded from the DBF table.</returns>
/// <exception cref="InvalidOperationException">Another reader of the DBF table is opened.</exception>
/// <exception cref="ObjectDisposedException">The DBF table is disposed.</exception>
public static DataTable AsDataTable(this DbfTable table)
{
if (table == null)
{
throw new ArgumentNullException("table");
}
var dataTable = CreateDataTable(table);
FillData(table, dataTable);
return(dataTable);
}
public bool skipDeleted = true; // leave out deleted rows from result
internal Reader(DbfTable dbfTable, int startRecNo = 0)
{
if (dbfTable == null)
{
throw ExceptionFactory.CreateArgumentException("dbfTable", "null parameter");
}
this.dbfTable = dbfTable;
this.nextRecNo = Math.Max(startRecNo, 0);
this.skipDeleted = dbfTable.skipDeleted;
}
public IEnumerator <T> GetEnumerator <T>(bool skipDeleted) where T : class, new()
{
for (int i = 0; i < this.recCount; i++)
{
DbfRow row = this.GetRow(i);
if (skipDeleted && row.deleted)
{
continue;
}
yield return(DbfTable.Get <T>(row));
}
}
public static bool[] enabledKeyChars = new bool[enabledKeyCharsLen]; // It can be modified by users if only it's a problem!
#endregion
#region constructor -----------------------------------------------------------------------------------
internal IndexFileBase(Stream stream, DbfTable dbfTable, bool?skipDeleted = null, int indexPageCacheSize = 0)
{
disposed = false;
if (stream == null)
{
throw ExceptionFactory.CreateArgumentException("stream", "IndexFileXXXX/stream is null!");
}
this.stream = stream;
this._dbfTable = dbfTable;
this.skipDeleted = skipDeleted ?? dbfTable.skipDeleted;
this.indexPageCacheSize = indexPageCacheSize;
}
private static void FillData(DbfTable table, DataTable dataTable)
{
for (int i = 0; i < table.recCount; i++)
{
var rowDT = dataTable.NewRow();
var recDBF = table.GetRow(i);
foreach (var column in table.columns)
{
rowDT[column.name] = recDBF.GetValue(column) ?? DBNull.Value;
}
dataTable.Rows.Add(rowDT);
}
}
private static DataTable CreateDataTable(DbfTable table)
{
var dataTable = new DataTable()
{
Locale = CultureInfo.CurrentCulture
};
foreach (var column in table.columns)
{
var columnType = Nullable.GetUnderlyingType(column.type) ?? column.type;
dataTable.Columns.Add(column.name, columnType);
}
return(dataTable);
}
private int lastRecNo; // table filter (record limit)
#endregion
public DbfTablePocoEnumerator(DbfTable table, bool?skipDeleted = null, int?firstRecNo = null, int?lastRecNo = null)
{
this.table = table;
this.skipDeleted = skipDeleted ?? table.skipDeleted;
this.firstRecNo = firstRecNo ?? 0;
this.lastRecNo = lastRecNo ?? table.recCount - 1;
if (this.firstRecNo < 0)
{
this.firstRecNo = 0;
}
if (this.lastRecNo >= table.recCount)
{
this.lastRecNo = table.recCount - 1;
}
}
/// <summary>
/// Opens a table from the specified file.
/// </summary>
/// <param name="path">The file to be opened.</param>
/// <returns>A table instance.</returns>
/// <exception cref="ArgumentNullException"><paramref name="path"/> is <c>null</c> or empty.</exception>
/// <exception cref="NotSupportedException">The dBASE table constains one or more columns of unsupported type.</exception>
public static DbfTable Open(string path, DbfTableParameters parameters)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
var stream = new FileStream(path, FileMode.Open, parameters.fileAccess, parameters.fileShare);
var dbfFile = new DbfTable(stream, parameters);
dbfFile.dataFileName = path;
if (dbfFile.isExistsMemoField && parameters.openMemo)
{ // If exist a memo field and it is opened from a file, so I can find DBT/FPT/etc. memo file too.
dbfFile.JoinMemoFile();
}
return(dbfFile);
}
public IndexFileNDX(Stream stream, DbfTable dbfTable, bool?skipDeleted = null, int indexPageCacheSize = 0)
: base(stream, dbfTable, skipDeleted, indexPageCacheSize) // 'stream', 'dbfTable' and 'skipDeleted' already stored by base class constructor
{
this.header = GetHeader(stream); // fill 'header' & IsStreamValid/Exception if error
//
#if DEBUG
List <string> list = new List <string>();
for (int i = 1; (i < this.header.totalPages); i++)
{
list.Add(String.Empty);
list.Add(String.Format("*** Page {0} *** {1}", i, (i == this.header.rootPage) ? "[ROOT]" : ""));
var keyPages = KeyPageRead(i);
foreach (var kp in keyPages)
{
string line = String.Empty;
if (kp.leftPage > 0)
{
line = String.Format(">>page {0}: '", kp.leftPage);
}
else if (kp.recNo > 0)
{
line = String.Format("{0,5} rec: '", kp.recNo);
}
line += _dbfTable.parametersReadOnly.encoding.GetString(kp.key) + "'";
list.Add(line);
}
}
File.WriteAllLines(@".\IndexPages.txt", list, _dbfTable.parametersReadOnly.encoding);
#endif
}
internal void AtachedToAnotherTable(DbfTable dbfTable, int recNo)
{
this._dbfTableClassID = (dbfTable == null) ? Guid.Empty : dbfTable.dbfTableClassID;
this._recNo = recNo;
//
if (dbfTable != null)
{
if (!IsIdenticalColumnsDefinition(this._columns, dbfTable._columns))
{
throw ExceptionFactory.CreateArgumentException("dbfTable", "DbfRow.AtachedToAnotherTable/this.columns and dbfTable.columns aren't identical !");
}
}
//
foreach (var item in memoCache)
{
item.modified = ((item.data != null) && (item.data.Length > 0));
(item.column as Column).SetNull(_buffer);
}
}
public T Get <T>() where T : class, new() // new from 1.3 version
{
return(DbfTable.Get <T>(row_));
}
