ConfigurationManager.ConnectionStrings 属性

定义

命名空间:

System.Configuration

程序集:

System.Configuration.ConfigurationManager.dll

包:

System.Configuration.ConfigurationManager v8.0.0

Source:

ConfigurationManager.cs

获取当前应用程序默认配置的 ConnectionStringsSection 数据。

public:
 static property System::Configuration::ConnectionStringSettingsCollection ^ ConnectionStrings { System::Configuration::ConnectionStringSettingsCollection ^ get(); };

public static System.Configuration.ConnectionStringSettingsCollection ConnectionStrings { get; }

static member ConnectionStrings : System.Configuration.ConnectionStringSettingsCollection

Public Shared ReadOnly Property ConnectionStrings As ConnectionStringSettingsCollection

属性值

ConnectionStringSettingsCollection

当前应用程序的默认配置的 对象的内容 ConnectionStringsSection 。

例外

ConfigurationErrorsException

检索不到 ConnectionStringSettingsCollection 对象。

示例

以下示例演示如何使用连接字符串从数据库读取数据。

using System;  
using System.Configuration;  
using System.Data.SqlClient;  

namespace ConsoleApplication1  
{  
    class Program  
    {  
        static void Main(string[] args)  
        {  
            ReadProducts();  
        }  

        static void ReadProducts()  
        {  
            var connectionString = ConfigurationManager.ConnectionStrings["WingtipToys"].ConnectionString;  
            string queryString = "SELECT Id, ProductName FROM dbo.Products;";  
            using (var connection = new SqlConnection(connectionString))  
            {  
                var command = new SqlCommand(queryString, connection);  
                connection.Open();  
                using (var reader = command.ExecuteReader())  
                {  
                    while (reader.Read())  
                    {  
                        Console.WriteLine(String.Format("{0}, {1}", reader[0], reader[1]));  
                    }  
                }  
            }  
        }  
    }  
}  

Imports System.Configuration  
Imports System.Data.SqlClient  
Module Module1  

    Sub Main()  
        ReadProducts()  
    End Sub  

    Sub ReadProducts()  
        Dim connectionString = ConfigurationManager.ConnectionStrings("WingtipToys").ConnectionString  
        Dim queryString = "SELECT Id, ProductName FROM dbo.Products;"  
        Using connection As New SqlConnection(connectionString)  
            Dim command = New SqlCommand(queryString, connection)  
            connection.Open()  

            Using reader As SqlDataReader = command.ExecuteReader()  
                While reader.Read()  
                    Console.WriteLine(String.Format("{0}, {1}", reader(0), reader(1)))  
                End While  
            End Using  
        End Using  
    End Sub  

End Module  

前面的示例假定项目具有如下所示的 App.config。

<?xml version="1.0" encoding="utf-8" ?>  
<configuration>  
    <startup>   
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />  
    </startup>  
    <connectionStrings>  
      <add name="WingtipToys" connectionString="Data Source=(LocalDB)\v11.0;Initial Catalog=WingtipToys;Integrated Security=True;Pooling=False" />  
    </connectionStrings>  
</configuration>  

注解

对象 ConnectionStringsSection 包含配置文件的 connectionStrings 节的内容。

另请参阅

• ConnectionStringsSection
• ConnectionStringSettingsCollection