Query the history of chat on this chat room.

Namespace:  Microsoft.Rtc.Collaboration.GroupChat
Assembly:  Microsoft.Rtc.Collaboration.GroupChat(in Microsoft.Rtc.Collaboration.GroupChat.dll)

Syntax

Visual Basic (Declaration) 
Public 
Function 
BeginQueryChatHistory ( _
	
searchString 
As 
String, _
	
exactPhrase 
As 
Boolean, _
	
caseSensitive 
As 
Boolean, _
	
userCallback 
As 
AsyncCallback, _
	
state 
As 
Object _
) 
As 
IAsyncResult
Visual Basic (Usage) 
Dim 
instance 
As 

ChatRoomSession
Dim 
searchString 
As 
String
Dim 
exactPhrase 
As 
Boolean
Dim 
caseSensitive 
As 
Boolean
Dim 
userCallback 
As 
AsyncCallback
Dim 
state 
As 
Object
Dim 
returnValue 
As 
IAsyncResult

returnValue = instance.
BeginQueryChatHistory(
searchString, _
	
exactPhrase, 
caseSensitive, 
userCallback, _
	
state)
C# 
public 
IAsyncResult 
BeginQueryChatHistory(
	
string 
searchString,
	
bool 
exactPhrase,
	
bool 
caseSensitive,
	
AsyncCallback 
userCallback,
	
Object 
state
)

Parameters

searchString
Type: System . . :: . . String

The search string.

exactPhrase
Type: System . . :: . . Boolean

if set to true the search string is treated as an exact phrase; Otherwise, the search string is treated as a collection of words to match, and any single word match yields a message in the results.

caseSensitive
Type: System . . :: . . Boolean

if set to true treat the search as case sensitive.

userCallback
Type: System . . :: . . AsyncCallback

The method to be invoked when this asynchronous operation completes.

state
Type: System . . :: . . Object

An object to be passed back to the callback.

Return Value

Type: System . . :: . . IAsyncResult

An IAsyncResult that references this operation.

Exceptions

Exception Condition
ArgumentException

Thrown when invalid arguments are passed.
[Microsoft.Rtc.Collaboration.GroupChat.ChatServerConnectionException]

Thrown when the GroupChatEndpoint is not established.
[Microsoft.Rtc.Collaboration.GroupChat.ChatRoomSessionStateException]

Thrown when the ChatRoomSession is not joined.
[System.InvalidOperationException]

Thrown when the chat server connection is not in a valid state to send the command.
[RealTimeException]

Thrown when the GroupChatEndpoint encounters an error communicating with the group chat server.

Remarks

This request will be processed asynchronously. See EndQueryChatHistory(IAsyncResult) to complete this asynchronous operation.

See Also