SqlConnectionStringBuilder.InitialCatalog 属性

定义

命名空间:

System.Data.SqlClient

程序集:

System.Data.dll

获取或设置与连接关联的数据库的名称。

public:
 property System::String ^ InitialCatalog { System::String ^ get(); void set(System::String ^ value); };

[System.ComponentModel.TypeConverter(typeof(System.Data.SqlClient.SqlConnectionStringBuilder+SqlInitialCatalogConverter))]
public string InitialCatalog { get; set; }

[<System.ComponentModel.TypeConverter(typeof(System.Data.SqlClient.SqlConnectionStringBuilder+SqlInitialCatalogConverter))>]
member this.InitialCatalog : string with get, set

Public Property InitialCatalog As String

属性值

String

为 InitialCatalog 属性的值，或者，如果未提供任何值，则为 String.Empty。

属性

TypeConverterAttribute

例外

ArgumentNullException

若要将值设置为 null，请使用 Value。

示例

以下示例创建一个简单的连接字符串，然后使用 SqlConnectionStringBuilder 类将数据库的名称添加到该连接字符串。 该代码将显示 InitialCatalog 属性的内容，以验证该类能够从同义词 ("Database") 转换为相应的属性值。

using System.Data.SqlClient;

class Program
{
    static void Main()
    {
        try
        {
            string connectString = "Data Source=(local);" +
                "Integrated Security=true";

            SqlConnectionStringBuilder builder =
                new SqlConnectionStringBuilder(connectString);
            Console.WriteLine("Original: " + builder.ConnectionString);

            // Normally, you could simply set the InitialCatalog
            // property of the SqlConnectionStringBuilder object. This
            // example uses the default Item property (the C# indexer)
            // and the "Database" string, simply to demonstrate that
            // setting the value in this way results in the same
            // connection string:
            builder["Database"] = "AdventureWorks";
            Console.WriteLine("builder.InitialCatalog = "
                + builder.InitialCatalog);
            Console.WriteLine("Modified: " + builder.ConnectionString);

            using (SqlConnection connection =
                new SqlConnection(builder.ConnectionString))
            {
                connection.Open();
                // Now use the open connection.
                Console.WriteLine("Database = " + connection.Database);
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }

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

Imports System.Data.SqlClient
    
Module Module1
    Sub Main()
        Try
            Dim connectString As String = _
             "Data Source=(local);" & _
             "Integrated Security=True"

            Dim builder As New SqlConnectionStringBuilder(connectString)
            Console.WriteLine("Original: " & builder.ConnectionString)

            ' Normally, you could simply set the InitialCatalog
            ' property of the SqlConnectionStringBuilder object. This
            ' example uses the default Item property (the C# indexer)
            ' and the "Database" string, simply to demonstrate that
            ' setting the value in this way results in the same
            ' connection string.
            builder("Database") = "AdventureWorks"
            Console.WriteLine("builder.InitialCatalog = " _
                & builder.InitialCatalog)
            Console.WriteLine("Modified: " & builder.ConnectionString)

            Using connection As New SqlConnection(builder.ConnectionString)
                connection.Open()
                ' Now use the open connection.
                Console.WriteLine("Database = " & connection.Database)
            End Using

        Catch ex As Exception
            Console.WriteLine(ex.Message)
        End Try

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

注解

此属性与连接字符串内的“Initial Catalog”和“database”键相对应。

另请参阅

• ADO.NET 中的连接字符串
• ADO.NET 概述