ConnectionString Property (DynamicsConnection)

Visual Basic
C#

'Declaration
 
Public Shadows Property ConnectionString As String

public new string ConnectionString {get; set;}

Property Value

The connection string that includes the parameters needed to establish the initial connection. The default value is an empty string ("").

When ConnectionString property is assigned a value, connection closes. Many of the connection string values have corresponding properties. When the connection string is set, all of these properties are updated, except when an error is detected. In this case, none of the properties are updated. DynamicsConnection properties return only those settings contained in the ConnectionString.

Resetting the ConnectionString on a closed connection resets all connection string values (and related properties).

The connection string is parsed immediately after being set. If errors in syntax are found when parsing, a runtime exception, such as System.ArgumentException, is generated. Other errors can be found only when an attempt is made to Open the connection.

The ConnectionString is similar to an OLE DB connection string. Values may be delimited by single or double quotes, (for example, name='value' or name="value"). Either single or double quotes may be used within a connection string by using the other delimiter, for example, name="value's" or name= 'value"s', but not name= 'value's' or name= ""value"". All blank characters, except those placed within a value or within quotes, are ignored. Keyword value pairs must be separated by a semicolon (;). If a semicolon is part of a value, it also must be delimited by quotes. No escape sequences are supported. The value type is irrelevant. Names are not case sensitive. Arguments names may occur only once in the connection string.

The following table lists the valid names for values within the ConnectionString.

Name	Description
Authentication Type	Determines the authentication method to use. The following kinds are supported: RefreshToken and UsernamePassword. See AuthenticationType for more information.
Client Id	One of the pair of OAuth 2.0 credentials, that you can obtain when you register an OAuth 2.0 application in your Azure AD tenant.
Client Secret	The second one of the pair of OAuth 2.0 credentials, that you can obtain when you register an OAuth 2.0 application in your Azure AD tenant.
Connection Lifetime	When a connection is returned to the pool, its creation time is compared with the current time, and the connection is destroyed if that time span (in seconds) exceeds the value specified by Connection Lifetime. The default value is 0 (connection always returns to pool).
Connect Timeout -or- Connection Timeout	The length of time (in seconds) to wait for a connection to the server before terminating the attempt and generating an error. The default value is 15.
Default Command Timeout	The time in seconds to wait while trying to execute a command before terminating the attempt and generating an error. A value of 0 indicates no limit.
Initialization Command	Specifies a data source-specific command that should be executed immediately after establishing the connection.
Max Pool Size	The maximum number of connections allowed in the pool. Setting the Max Pool Size value of the ConnectionString can affect performance. The default value is 100.
Min Pool Size	The minimum number of connections allowed in the pool. The default value is 0.
Password	The password for UserNamePassword authentication.
Persist Security Info	Indicates if security-sensitive information, such as the password, is not returned as part of the connection if the connection is open or has ever been in an open state.
Pooling	If true, by default, the DynamicsConnection object is drawn from the appropriate pool or is created and added to the appropriate pool.
Proxy Host	The host name or IP address of proxy server.
Proxy Password	The password for the proxy server account.
Proxy Port	The port number of the proxy server. The default value is 3128.
Proxy User	The proxy server account name.
Run Once Command	A command to execute when the connection is opened the first time and not executed when the connection is taken from the pool.
Readonly	Determines whether the connection is read-only (allows only SELECT statements).
Refresh Token	OAuth 2.0 refresh token, used for RefreshToken authentication.
Server	The login URL to Dynamics CRM service.
User Id	The Dynamics CRM login account. Required for UserNamePassword authentication.
UTC Dates	Indicates whether all the datetime values retrieved from the data source are returned as UTC values or converted to local time, and whether date values, specified on the application side (for example, in SQL statements) are considered UTC or local. Default value is false.

The following example creates a DynamicsConnection and sets some of its properties in the connection string.

csharp

public void CreateDynamicsConnection()
{
  string myConnString1 = 
     "Server=https://your_company.crm4.dynamics.com;User [email protected];Password=A123456789;";
  DynamicsConnection dynamicsConnection1 = new DynamicsConnection(myConnString1);
  dynamicsConnection1.Open();
}

Visual Basic

Public Sub CreateDynamicsConnection()
  Dim myConnString1 As String = _
      "Server=https://your_company.crm4.dynamics.com;User [email protected];Password=A123456789;"
  Dim dynamicsConnection1 As New DynamicsConnection(myConnString1)
  dynamicsConnection1.Open()
End Sub

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

DynamicsConnection Class
DynamicsConnection Members
Open Method
DynamicsConnectionStringBuilder Class