TextSnapshotToTextReader.ReadBlock Method
Reads a maximum of count characters from the current stream and writes the data to the buffer, beginning at index.
Namespace: Microsoft.VisualStudio.Text
Assembly: Microsoft.VisualStudio.Text.Data (in Microsoft.VisualStudio.Text.Data.dll)
Syntax
'宣言
Public Overrides Function ReadBlock ( _
buffer As Char(), _
index As Integer, _
count As Integer _
) As Integer
public override int ReadBlock(
char[] buffer,
int index,
int count
)
public:
virtual int ReadBlock(
array<wchar_t>^ buffer,
int index,
int count
) override
abstract ReadBlock :
buffer:char[] *
index:int *
count:int -> int
override ReadBlock :
buffer:char[] *
index:int *
count:int -> int
public override function ReadBlock(
buffer : char[],
index : int,
count : int
) : int
Parameters
- buffer
Type: array<System.Char[]
When this method returns, contains the specified character array from the current source.
- index
Type: System.Int32
The place in buffer at which to begin writing.
- count
Type: System.Int32
The maximum number of characters to read.
Return Value
Type: System.Int32
The number of characters that have been read. The number will be less than or equal to count, depending on whether the data is available within the stream. This method returns zero if called when no more characters are left to read.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | buffer is nulla null reference (Nothing in Visual Basic). |
| ArgumentOutOfRangeException | index or count is negative, or the buffer length minus index is less than count. |
| ObjectDisposedException | The reader is closed. |
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.