XmlWriter.WriteChars Method (Char[], Int32, Int32)
When overridden in a derived class, writes text one buffer at a time.
Assembly: System.Xml (in System.Xml.dll)
Parameters
- buffer
-
Type:
System.Char[]
Character array containing the text to write.
- index
-
Type:
System.Int32
The position in the buffer indicating the start of the text to write.
- count
-
Type:
System.Int32
The number of characters to write.
| Exception | Condition |
|---|---|
| ArgumentNullException | buffer is null. |
| ArgumentOutOfRangeException | index or count is less than zero. -or- The buffer length minus index is less than count; the call results in surrogate pair characters being split or an invalid surrogate pair being written. |
| ArgumentException | The buffer parameter value is not valid. |
| InvalidOperationException | An XmlWriter method was called before a previous asynchronous operation finished. In this case, InvalidOperationException is thrown with the message “An asynchronous operation is already in progress.” |
This method can be used to write large amounts of text one buffer at a time.
Special handling must be done to ensure the WriteChars method does not split surrogate pair characters across multiple buffer writes. The XML specification defines the valid ranges for surrogate pairs.
For the asynchronous version of this method, see WriteCharsAsync.
using (XmlWriter writer = XmlWriter.Create("WriteChars.xml")) { writer.WriteStartDocument(); char[] ch = new char[4]; ch[0] = 't'; ch[1] = 'e'; ch[2] = 'x'; ch[3] = 't'; writer.WriteStartElement("WriteCharacters"); writer.WriteChars(ch, 0, ch.Length); writer.WriteEndElement(); writer.WriteEndDocument(); }
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1