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OleDbConnectionStringBuilder 建構函式

定義

初始化 OleDbConnectionStringBuilder 類別的新執行個體。

多載

OleDbConnectionStringBuilder()

初始化 OleDbConnectionStringBuilder 類別的新執行個體。

OleDbConnectionStringBuilder(String)

初始化 OleDbConnectionStringBuilder 類別的新執行個體。 所提供的連接字串會提供執行個體內部連接資訊的資料。

OleDbConnectionStringBuilder()

來源:
OleDbConnectionStringBuilder.cs
來源:
OleDbConnectionStringBuilder.cs
來源:
OleDbConnectionStringBuilder.cs
來源:
OleDbConnectionStringBuilder.cs
來源:
OleDbConnectionStringBuilder.cs

初始化 OleDbConnectionStringBuilder 類別的新執行個體。

public:
 OleDbConnectionStringBuilder();
public OleDbConnectionStringBuilder ();
Public Sub New ()

另請參閱

適用於

OleDbConnectionStringBuilder(String)

來源:
OleDbConnectionStringBuilder.cs
來源:
OleDbConnectionStringBuilder.cs
來源:
OleDbConnectionStringBuilder.cs
來源:
OleDbConnectionStringBuilder.cs
來源:
OleDbConnectionStringBuilder.cs

初始化 OleDbConnectionStringBuilder 類別的新執行個體。 所提供的連接字串會提供執行個體內部連接資訊的資料。

public:
 OleDbConnectionStringBuilder(System::String ^ connectionString);
public OleDbConnectionStringBuilder (string? connectionString);
public OleDbConnectionStringBuilder (string connectionString);
new System.Data.OleDb.OleDbConnectionStringBuilder : string -> System.Data.OleDb.OleDbConnectionStringBuilder
Public Sub New (connectionString As String)

參數

connectionString
String

物件內部連接資訊的基準。 剖析成索引鍵/值組。

例外狀況

連接字串的格式錯誤 (也許在索引鍵/值組中遺漏了必要的 "=")。

範例

下列範例會建立多個OleDbConnectionStringBuilder實例,在每個案例中將不同的 連接字串 傳遞至建構函式。 請注意,設定與連接相關聯的提供者如何變更物件集合內預先定義的索引鍵/值組。

注意

這個範例包含了密碼,可示範 OleDbConnectionStringBuilder 如何搭配連接字串使用。 我們建議在您的應用程式中使用 Windows 驗證。 如果您必須使用密碼,請勿在您的應用程式中包含硬式編碼的密碼。

using System.Data.OleDb;

class Program
{
    static void Main()
    {
        try
        {
            // Build an empty instance, just to see
            // the contents of the keys.
            DumpBuilderContents("");

            // Create a SQL Server connection string.
            DumpBuilderContents("Provider=sqloledb;Data Source=(local);" +
                "Initial Catalog=AdventureWorks;" +
                "User Id=ab;Password=Password@1");

            // Create an Access connection string.
            DumpBuilderContents("Provider=Microsoft.Jet.OLEDB.4.0;" +
                @"Data Source=C:\Sample.mdb");

            // Create an Oracle connection string.
            DumpBuilderContents("Provider=msdaora;Data Source=SomeOracleDb;" +
                "User Id=userName;Password=Pass@word1;");

            // Create an Sybase connection string.
            DumpBuilderContents("Provider=ASAProv;Data source=myASA");

            Console.WriteLine("Press any key to finish.");
            Console.ReadLine();
        }
        catch (System.ArgumentException ex)
        {

            Console.WriteLine("Error: " + ex.Message);
        }
    }

    private static void DumpBuilderContents(string connectString)
    {
        OleDbConnectionStringBuilder builder =
            new OleDbConnectionStringBuilder(connectString);
        Console.WriteLine("=================");
        Console.WriteLine("Original connectString   = " + connectString);
        Console.WriteLine("builder.ConnectionString = " + builder.ConnectionString);
        foreach (string key in builder.Keys)
        {
            Console.WriteLine(key + "=" + builder[key].ToString());
        }
    }
}
Imports System.Data.OleDb    

Module Module1
  Sub Main()
    Try
      ' Build an empty instance, just to see
      ' the contents of the keys.
      DumpBuilderContents("")

      ' Create a SQL Server connection string.
      DumpBuilderContents("Provider=sqloledb;Data Source=(local);" & _
       "Initial Catalog=AdventureWorks;" & _
       "User Id=ab;Password=Password@1")

      ' Create an Access connection string.
      DumpBuilderContents("Provider=Microsoft.Jet.OLEDB.4.0;" & _
       "Data Source=C:\Sample.mdb")

      ' Create an Oracle connection string.
      DumpBuilderContents("Provider=msdaora;Data Source=SomeOracleDb;" & _
       "User Id=userName;Password=Pass@word1;")

      ' Create a Sybase connection string.
      DumpBuilderContents("Provider=ASAProv;Data source=myASA")

      Console.WriteLine("Press any key to finish.")
      Console.ReadLine()

    Catch ex As System.ArgumentException
      Console.WriteLine("Error: " & ex.Message)
    End Try
  End Sub

  Private Sub DumpBuilderContents(ByVal connectString As String)
    Dim builder As New OleDbConnectionStringBuilder(connectString)
    Console.WriteLine("=================")
    Console.WriteLine("Original connectString   = " & connectString)
    Console.WriteLine("builder.ConnectionString = " & builder.ConnectionString)
    For Each key As String In builder.Keys
      Console.WriteLine(key & "=" & builder.Item(key).ToString)
    Next
  End Sub
End Module

備註

Provider藉由設定ConnectionString屬性) 或將 連接字串 當做參數傳遞至建構函式,直接 (屬性,可能會影響 實例內所含的OleDbConnectionStringBuilder索引鍵/值組集。 例如,將 Provider 屬性設定為 「sqloledb」 ,會新增所有標準 SQL 連接字串 屬性。 如需此行為的示範,請參閱本主題中的範例。

對於某些提供者,指派建構函式內的 OleDbConnectionStringBuilder 連接字串 會導致重新排列提供的索引鍵/值組順序。

另請參閱

適用於