Class DataProvider
Summary description for DataProvider.
Implements
Namespace: Syncfusion.XlsIO.Parser.Biff_Records
Assembly: Syncfusion.XlsIO.Base.dll
Syntax
public abstract class DataProvider : Object, IDisposableConstructors
DataProvider()
Default constructor.
Declaration
public DataProvider()Properties
Capacity
Returns size of the internal buffer. Read-only.
Declaration
public abstract int Capacity { get; }Property Value
| Type |
|---|
| System.Int32 |
IsCleared
Indicates whether data provider was cleared.
Declaration
public abstract bool IsCleared { get; }Property Value
| Type |
|---|
| System.Boolean |
Methods
Clear()
Clears internal storage if allowed.
Declaration
public abstract void Clear()CopyMemory(Int32, Int32, Int32)
Copies memory inside internal buffer.
Declaration
public abstract void CopyMemory(int iDestOffset, int iSourceOffset, int iMemorySize)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iDestOffset | Destination offset. |
| System.Int32 | iSourceOffset | Source offset. |
| System.Int32 | iMemorySize | Memory size. |
CopyTo(Int32, DataProvider, Int32, Int32)
Copies data from internal storage into specified provider.
Declaration
public virtual void CopyTo(int iSourceOffset, DataProvider destination, int iDestOffset, int iLength)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iSourceOffset | Source offset. |
| DataProvider | destination | Destination provider. |
| System.Int32 | iDestOffset | Destination offset. |
| System.Int32 | iLength | Size in bytes of the data to copy. |
CopyTo(Int32, Byte[], Int32, Int32)
Copies data from internal storage into specified data array.
Declaration
public abstract void CopyTo(int iSourceOffset, byte[] arrDestination, int iDestOffset, int iLength)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iSourceOffset | Source offset. |
| System.Byte[] | arrDestination | Destination array. |
| System.Int32 | iDestOffset | Destination offset. |
| System.Int32 | iLength | Size in bytes of the data to copy. |
CreateProvider()
Creates data provider of the same type.
Declaration
public abstract DataProvider CreateProvider()Returns
| Type | Description |
|---|---|
| DataProvider | Created data provider. |
Dispose()
Dispose DataProvider
Declaration
public void Dispose()Dispose(Boolean)
Declaration
public void Dispose(bool isDisposing)Parameters
| Type | Name | Description |
|---|---|---|
| System.Boolean | isDisposing |
EnsureCapacity(Int32)
Resizes internal storage if necessary.
Declaration
public abstract int EnsureCapacity(int size)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | size | Required size. |
Returns
| Type |
|---|
| System.Int32 |
EnsureCapacity(Int32, Int32)
Resizes internal storage if necessary.
Declaration
public abstract int EnsureCapacity(int size, int forceAdd)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | size | |
| System.Int32 | forceAdd |
Returns
| Type |
|---|
| System.Int32 |
Finalize()
Declaration
protected override void Finalize()MoveMemory(Int32, Int32, Int32)
Moves memory inside internal buffer.
Declaration
public abstract void MoveMemory(int iDestOffset, int iSourceOffset, int iMemorySize)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iDestOffset | Destination offset. |
| System.Int32 | iSourceOffset | Source offset. |
| System.Int32 | iMemorySize | Memory size. |
OnDispose()
Declaration
protected virtual void OnDispose()Read(BinaryReader, Int32, Int32, Byte[])
Reads data from BinaryReader.
Declaration
public abstract void Read(BinaryReader reader, int iOffset, int iLength, byte[] arrBuffer)Parameters
| Type | Name | Description |
|---|---|---|
| System.IO.BinaryReader | reader | Reader to get data from. |
| System.Int32 | iOffset | Offset in the internal data to start filling from. |
| System.Int32 | iLength | Number of bytes to read. |
| System.Byte[] | arrBuffer | Temporary buffer to use. |
Read(BinaryReader, Int32, Int32, Byte[], IDecryptor)
Reads data from BinaryReader.
Declaration
public void Read(BinaryReader reader, int iOffset, int iLength, byte[] arrBuffer, IDecryptor decryptor)Parameters
| Type | Name | Description |
|---|---|---|
| System.IO.BinaryReader | reader | Reader to get data from. |
| System.Int32 | iOffset | Offset in the internal data to start filling from. |
| System.Int32 | iLength | Number of bytes to read. |
| System.Byte[] | arrBuffer | Temporary buffer to use. |
| IDecryptor | decryptor | Object used to decrypt data if necessary. |
ReadAddr(Int32)
Gets TAddr structure from internal data.
Declaration
public TAddr ReadAddr(int offset)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset in bytes of TAddr structure to get. |
Returns
| Type | Description |
|---|---|
| TAddr | Retrieved TAddr structure. |
ReadAddrAsRectangle(Int32)
Gets TAddr structure from internal data.
Declaration
public Rectangle ReadAddrAsRectangle(int offset)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset in bytes of TAddr structure to get. |
Returns
| Type | Description |
|---|---|
| System.Drawing.Rectangle | Retrieved TAddr structure. |
ReadArray(Int32, Byte[])
Reads data array from another data array.
Declaration
public int ReadArray(int iOffset, byte[] arrDest)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Source offset. |
| System.Byte[] | arrDest | Destination array. |
Returns
| Type | Description |
|---|---|
| System.Int32 | Updated source offset. |
ReadArray(Int32, Byte[], Int32)
Reads data array from another data array.
Declaration
public int ReadArray(int iOffset, byte[] arrDest, int size)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Source offset. |
| System.Byte[] | arrDest | Destination array. |
| System.Int32 | size | Number of bytes to read. |
Returns
| Type | Description |
|---|---|
| System.Int32 | Updated source offset. |
ReadBit(Int32, Int32)
Returns bit value at the specified position.
Declaration
public bool ReadBit(int iOffset, int iBit)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
| System.Int32 | iBit | Bit index in the byte. |
Returns
| Type | Description |
|---|---|
| System.Boolean | Bit at the specified position. |
ReadBoolean(Int32)
Returns boolean value at the specified position.
Declaration
public bool ReadBoolean(int iOffset)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
Returns
| Type | Description |
|---|---|
| System.Boolean | Byte at the specified position. |
ReadByte(Int32)
Returns byte value at the specified position.
Declaration
public abstract byte ReadByte(int iOffset)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
Returns
| Type | Description |
|---|---|
| System.Byte | Byte at the specified position. |
ReadDouble(Int32)
Returns Int32 value at the specified position.
Declaration
public virtual double ReadDouble(int iOffset)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
Returns
| Type | Description |
|---|---|
| System.Double | Int32 value at the specified position. |
ReadInt16(Int32)
Returns Int16 value at the specified position.
Declaration
public abstract short ReadInt16(int iOffset)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
Returns
| Type | Description |
|---|---|
| System.Int16 | Int16 value at the specified position. |
ReadInt32(Int32)
Returns Int32 value at the specified position.
Declaration
public abstract int ReadInt32(int iOffset)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
Returns
| Type | Description |
|---|---|
| System.Int32 | Int32 value at the specified position. |
ReadInt64(Int32)
Returns Int32 value at the specified position.
Declaration
public abstract long ReadInt64(int iOffset)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
Returns
| Type | Description |
|---|---|
| System.Int64 | Int32 value at the specified position. |
ReadString(Int32, Int32, out Int32, Boolean)
Gets string from internal record data using GetBytes.
Declaration
public string ReadString(int offset, int iStrLen, out int iBytesInString, bool isByteCounted)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset of starting byte. |
| System.Int32 | iStrLen | Length of the string. |
| System.Int32 | iBytesInString | Gets bytes count that this string occupies in the data array. |
| System.Boolean | isByteCounted | Flags that represent is bytes count available. |
Returns
| Type | Description |
|---|---|
| System.String | Retrieved string. |
ReadString(Int32, Int32, Encoding, Boolean)
Reads string from data provider.
Declaration
public abstract string ReadString(int offset, int stringLength, Encoding encoding, bool isUnicode)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset to the first character. |
| System.Int32 | stringLength | Number of bytes in the string. |
| System.Text.Encoding | encoding | Encoding to use. |
| System.Boolean | isUnicode | Indicates whether string is unicode. |
Returns
| Type | Description |
|---|---|
| System.String | Extracted string. |
ReadString16Bit(Int32, out Int32)
Gets string from internal data and returns it's length in iFullLength parameter.
Declaration
public virtual string ReadString16Bit(int iOffset, out int iFullLength)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the string data. |
| System.Int32 | iFullLength | Length of the string in bytes. |
Returns
| Type | Description |
|---|---|
| System.String | Parsed string. |
Exceptions
| Type | Condition |
|---|---|
| System.ArgumentOutOfRangeException | When data array is smaller than the string that should be in it. |
ReadString16BitUpdateOffset(ref Int32)
Gets string from internal data and updates offset.
Declaration
public virtual string ReadString16BitUpdateOffset(ref int iOffset)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the string data. |
Returns
| Type | Description |
|---|---|
| System.String | Parsed string. |
Exceptions
| Type | Condition |
|---|---|
| System.ArgumentOutOfRangeException | When data array is smaller than the string that should be in it. |
ReadString8Bit(Int32, out Int32)
Gets string from byte array and returns it's length in iFullLength parameter.
Declaration
public virtual string ReadString8Bit(int iOffset, out int iFullLength)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the string data. |
| System.Int32 | iFullLength | Length of the string in bytes. |
Returns
| Type | Description |
|---|---|
| System.String | Parsed string. |
Exceptions
| Type | Condition |
|---|---|
| System.ArgumentOutOfRangeException | When data array is smaller than the string that should be in it. |
ReadStringUpdateOffset(ref Int32, Int32)
Gets string from internal record data using GetBytes and it increases offset by string size in bytes.
Declaration
public string ReadStringUpdateOffset(ref int offset, int iStrLen)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset of starting byte. |
| System.Int32 | iStrLen | Length of the string. |
Returns
| Type | Description |
|---|---|
| System.String | Retrieved string. |
Exceptions
| Type | Condition |
|---|---|
| System.ArgumentOutOfRangeException | if Offset + iStrLen is out of data array |
ReadUInt16(Int32)
Returns UInt16 value at the specified position.
Declaration
public ushort ReadUInt16(int iOffset)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
Returns
| Type | Description |
|---|---|
| System.UInt16 | Int16 value at the specified position. |
ReadUInt32(Int32)
Returns Int32 value at the specified position.
Declaration
public uint ReadUInt32(int iOffset)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
Returns
| Type | Description |
|---|---|
| System.UInt32 | Int32 value at the specified position. |
WriteAddr(Int32, TAddr)
Sets TAddr structure in internal record data.
Declaration
protected void WriteAddr(int offset, TAddr addr)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset in bytes of TAddr structure to set. |
| TAddr | addr | New value of the TAddr at the specified position. |
WriteAddr(Int32, Rectangle)
Sets TAddr structure in internal record data.
Declaration
protected void WriteAddr(int offset, Rectangle addr)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset in bytes of TAddr structure to set. |
| System.Drawing.Rectangle | addr | New value of the Rectangle at the specified position. |
WriteBit(Int32, Boolean, Int32)
Sets one bit in specified byte in internal record data array.
Declaration
public abstract void WriteBit(int offset, bool value, int bitPos)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset of the byte in the data array. |
| System.Boolean | value | Value of bit. |
| System.Int32 | bitPos | Bit position in the byte. |
Exceptions
| Type | Condition |
|---|---|
| System.ArgumentOutOfRangeException | If bitPos is less than zero or more than 7. |
WriteByte(Int32, Byte)
Writes byte value at the specified position.
Declaration
public abstract void WriteByte(int iOffset, byte value)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
| System.Byte | value | Byte value to write at the specified position. |
WriteBytes(Int32, Byte[])
Sets bytes in internal record data array values.
Declaration
public void WriteBytes(int offset, byte[] data)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset in internal record data array to start from. |
| System.Byte[] | data | Array of bytes to set. |
Exceptions
| Type | Condition |
|---|---|
| System.ArgumentOutOfRangeException | If value array is NULL. |
| System.ArgumentOutOfRangeException | If pos or length would be less than zero or their sum would be more than size of value array. |
| System.ArgumentOutOfRangeException | If internal record data array is too small for receiving value array and AutoGrowData is False. |
WriteBytes(Int32, Byte[], Int32, Int32)
Sets bytes in internal record data array values.
Declaration
public abstract void WriteBytes(int offset, byte[] value, int pos, int length)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset in internal record data array to start from. |
| System.Byte[] | value | Array of bytes to set. |
| System.Int32 | pos | Position in value array to the data that will be set. |
| System.Int32 | length | Length of the data. |
Exceptions
| Type | Condition |
|---|---|
| System.ArgumentOutOfRangeException | If value array is NULL. |
| System.ArgumentOutOfRangeException | If pos or length would be less than zero or their sum would be more than size of value array. |
| System.ArgumentOutOfRangeException | If internal record data array is too small for receiving value array and AutoGrowData is False. |
WriteDouble(Int32, Double)
Writes Double value at the specified position.
Declaration
public abstract void WriteDouble(int iOffset, double value)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
| System.Double | value | Double value to write at the specified position. |
WriteInt16(Int32, Int16)
Writes Int16 value at the specified position.
Declaration
public abstract void WriteInt16(int iOffset, short value)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
| System.Int16 | value | Int16 value to write at the specified position. |
WriteInt32(Int32, Int32)
Writes Int16 value at the specified position.
Declaration
public abstract void WriteInt32(int iOffset, int value)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
| System.Int32 | value | Int32 value to write at the specified position. |
WriteInt64(Int32, Int64)
Writes Int16 value at the specified position.
Declaration
public abstract void WriteInt64(int iOffset, long value)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
| System.Int64 | value | Int32 value to write at the specified position. |
WriteInto(BinaryWriter, Int32, Int32, Byte[])
Saves data into binary writer.
Declaration
public virtual void WriteInto(BinaryWriter writer, int iOffset, int iSize, byte[] arrBuffer)Parameters
| Type | Name | Description |
|---|---|---|
| System.IO.BinaryWriter | writer | Writer to save data into. |
| System.Int32 | iOffset | Start offset in the internal storage. |
| System.Int32 | iSize | Number of bytes to save. |
| System.Byte[] | arrBuffer | Temporary buffer to use. |
WriteString16Bit(Int32, String)
Sets string in internal data. The String length is saved in two bytes.
Declaration
public int WriteString16Bit(int offset, string value)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset to the string. |
| System.String | value | Value of the string. |
Returns
| Type | Description |
|---|---|
| System.Int32 | Size of the written data. |
WriteString16Bit(Int32, String, Boolean)
Sets string in internal data. The String length is saved in two bytes.
Declaration
public int WriteString16Bit(int offset, string value, bool isUnicode)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset to the string. |
| System.String | value | Value of the string. |
| System.Boolean | isUnicode | Indicates whether string should be stored in unicode format. |
Returns
| Type | Description |
|---|---|
| System.Int32 | Size of the written data. |
WriteString16BitUpdateOffset(ref Int32, String)
Sets string in internal data. The String length is saved in two bytes.
Declaration
public void WriteString16BitUpdateOffset(ref int offset, string value)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset to the string. |
| System.String | value | Value of the string. |
WriteString16BitUpdateOffset(ref Int32, String, Boolean)
Sets string in internal data. The String length is saved in two bytes.
Declaration
public void WriteString16BitUpdateOffset(ref int offset, string value, bool isUnicode)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset to the string. |
| System.String | value | Value of the string. |
| System.Boolean | isUnicode | Indicates whether string should be stored as unicode. |
WriteString8BitUpdateOffset(ref Int32, String)
Sets string in internal data. The String length is saved in two bytes.
Declaration
public void WriteString8BitUpdateOffset(ref int offset, string value)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset to the string. |
| System.String | value | Value of the string. |
WriteStringNoLenUpdateOffset(ref Int32, String)
Sets string in internal record data without string length, updates offset parameter (adds string length).
Declaration
public virtual void WriteStringNoLenUpdateOffset(ref int offset, string value)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset to the string. |
| System.String | value | Value of the string. |
WriteStringNoLenUpdateOffset(ref Int32, String, Boolean)
Sets string in internal record data without string length, updates offset parameter (adds string length).
Declaration
public abstract void WriteStringNoLenUpdateOffset(ref int offset, string value, bool bUnicode)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | offset | Offset to the string. |
| System.String | value | Value of the string. |
| System.Boolean | bUnicode | Indicates whether string should be stored in Unicode encoding or not. |
WriteUInt16(Int32, UInt16)
Writes Int16 value at the specified position.
Declaration
public virtual void WriteUInt16(int iOffset, ushort value)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
| System.UInt16 | value | Int16 value to write at the specified position. |
WriteUInt32(Int32, UInt32)
Writes Int16 value at the specified position.
Declaration
public void WriteUInt32(int iOffset, uint value)Parameters
| Type | Name | Description |
|---|---|---|
| System.Int32 | iOffset | Offset to the required value. |
| System.UInt32 | value | Int32 value to write at the specified position. |
ZeroMemory()
Writes zeros inside memory block.
Declaration
public abstract void ZeroMemory()