SqlException.ToString 方法
定义
返回表示当前 SqlException 对象的字符串,并包括客户端连接 ID(有关更多信息,请参见 ClientConnectionId)。Returns a string that represents the current SqlException object, and includes the client connection ID (for more information, see ClientConnectionId).
public:
override System::String ^ ToString();
public override string ToString ();
override this.ToString : unit -> string
Public Overrides Function ToString () As String
返回
一个字符串,表示当前的 SqlException object.String。A string that represents the current SqlException object.String.
示例
下面的 c # 示例演示连接如何尝试连接到有效的服务器,但不存在的数据库将导致 SqlException ,其中包含客户端连接 ID:The following C# example shows how a connection attempt to a valid server but non-existent database causes a SqlException, which includes the client connection ID:
using System.Data.SqlClient;
using System;
public class A {
public static void Main() {
SqlConnection connection = new SqlConnection();
connection.ConnectionString = "Data Source=a_valid_server;Initial Catalog=Northwinda;Integrated Security=true";
try {
connection.Open();
}
catch (SqlException p) {
Console.WriteLine("{0}", p.ClientConnectionId);
Console.WriteLine("{0}", p.ToString());
}
connection.Close();
}
}
以下 Visual Basic 示例在功能上等同于前面的 (c # ) 示例:The following Visual Basic sample is functionally equivalent to the previous (C#) sample:
Imports System.Data.SqlClient
Imports System
Module Module1
Sub Main()
Dim connection As New SqlConnection()
connection.ConnectionString = "Data Source=a_valid_server;Initial Catalog=Northwinda;Integrated Security=true"
Try
connection.Open()
Catch p As SqlException
Console.WriteLine("{0}", p.ClientConnectionId)
Console.WriteLine("{0}", p.ToString())
End Try
connection.Close()
End Sub
End Module