DbConnectionStringBuilder.Count 属性

定义

命名空间:

System.Data.Common

程序集:

System.Data.Common.dll

Source:

DbConnectionStringBuilder.cs

获取属性 ConnectionString 中包含的键的当前数目。

public:
 virtual property int Count { int get(); };

[System.ComponentModel.Browsable(false)]
public virtual int Count { get; }

[<System.ComponentModel.Browsable(false)>]
member this.Count : int

Public Overridable ReadOnly Property Count As Integer

属性值

Int32

由 DbConnectionStringBuilder 实例维护的连接字符串中包含的键的数目。

实现

Count

属性

BrowsableAttribute

示例

下面的示例演示 Count 修改 属性内容之前和之后的属性 ConnectionString 。

static void Main()
{
    DbConnectionStringBuilder builder = new DbConnectionStringBuilder();
    builder.ConnectionString =
        "Data Source=(local);Initial Catalog=AdventureWorks;" +
        "Integrated Security=SSPI";

    // This should display "3" in the console window.
    Console.WriteLine("Original count: " + builder.Count);

    builder.Add("Connection Timeout", 25);

    // This should display the new connection string and
    // the number of items (4) in the console window.
    Console.WriteLine(builder.ConnectionString);
    Console.WriteLine("New count: " + builder.Count);

    Console.WriteLine();
    Console.WriteLine("Press Enter to finish.");
    Console.ReadLine();
}

Sub Main()
    Dim builder As New DbConnectionStringBuilder
    builder.ConnectionString = _
        "Data Source=(local);Initial Catalog=AdventureWorks;" & _
        "Integrated Security=SSPI"

    ' This should display "3" in the console window.
    Console.WriteLine(builder.Count)

    builder.Add("Connection Timeout", 25)

    ' This should display the new connection string and
    ' the number of items (4) in the console window.
    Console.WriteLine(builder.ConnectionString)
    Console.WriteLine(builder.Count)

    Console.WriteLine()
    Console.WriteLine("Press Enter to finish.")
    Console.ReadLine()
End Sub

另请参阅

• ADO.NET 中的连接字符串
• ADO.NET 概述