Database.EnumCandidateKeys-Methode

Artikel
07/13/2013

Enumerates a list of all candidate primary keys in the database, which can be referenced by a foreign key.

Namespace: Microsoft.SqlServer.Management.Smo
Assembly: Microsoft.SqlServer.Smo (in Microsoft.SqlServer.Smo.dll)

Syntax

'Declaration
Public Function EnumCandidateKeys As DataTable
'Usage
Dim instance As Database 
Dim returnValue As DataTable 

returnValue = instance.EnumCandidateKeys()

public DataTable EnumCandidateKeys()

public:
DataTable^ EnumCandidateKeys()

member EnumCandidateKeys : unit -> DataTable

public function EnumCandidateKeys() : DataTable

Rückgabewert

Typ: System.Data.DataTable
A DataTable system object value that contains an enumerated list of candidate keys. The table describes the different columns of the returned DataTable.

Column	Data type	Description
Table_Name	String	The name of the table that contains the candidate primary key.
Name	String	The name of the candidate primary key.

Beispiele

The example runs a Server object enumeration method, but extracting the information from the DataTable object is the same for database object enumeration methods.

'Connect to the local, default instance of SQL Server.
Dim srv As Server
srv = New Server
'Call the EnumCollations method and return collation information to DataTable variable.
Dim d As DataTable
'Select the returned data into an array of DataRow.
d = srv.EnumCollations
'Iterate through the rows and display collation details for the instance of SQL Server.
Dim r As DataRow
Dim c As DataColumn
For Each r In d.Rows
    Console.WriteLine("============================================")
    For Each c In r.Table.Columns
        Console.WriteLine(c.ColumnName + " = " + r(c).ToString)
    Next
Next

PowerShell

$srv = new-Object Microsoft.SqlServer.Management.Smo.Server("(local)")

$d = new-object System.Data.Datatable
$d = $srv.EnumCollations

Foreach ($r in $d.Rows)
{
   Write-Host "============================================"
   Foreach ($c in $d.Columns)
   {
      Write-Host $c.ColumnName "=" $r[$c]
   }
}