c連接字符串錯誤數據庫＃

Question

我用它的數據庫從網上下載了一個項目。我運行該項目，並添加它的數據庫服務器選項卡上的VS 2008 SP1和具有SQL Server 2008

但是，當我一個新的連接字符串複製到程序中，我得到了以下錯誤消息：

無法識別的轉義序列

using System; 

using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Data.SqlClient; 
using System.Data; 
namespace AzmongirSource 
{ 
class cl 

    { 

    static public string idstudent; 
    static public string userteacher; 
    static public string nameazmon; 
    static public string codeazmon; 

    static public string azmon_typ; 
    static public string azmon_for_test_type; 
    static public string time_limit; 
    static public string tedade_soalat; 

    static public SqlConnection connection = new SqlConnection(); 
    static public SqlCommand command = new SqlCommand(); 
    static public SqlDataReader reader; 
    static public int truequestion = 0, falsequestion = 0, noquestion = 0; 


    static public void creatconnection() 
    { 

     connection.Close(); 
     connection.ConnectionString = "Data Source=WINXPX86-BE;AttachDbFilename=D:\payegah\azmoongir_data.MDF;Integrated Security=True"; 
     connection.Open(); 
     command.Connection = connection; 
    } 
    static public DataTable StudentList() 
    { 
     creatconnection(); 
     string query = "Select idstu as[شماره دانشجویی],namestu as [نام],familystu as [نام خانوادگی],standardcode as [کداستاندارد],reshte as [رشته] from tbl_student"; 
     SqlDataAdapter da = new SqlDataAdapter(query, cl.connection); 
     DataTable dtt = new DataTable(); 
     da.Fill(dtt); 
     connection.Close(); 
     return dtt; 

    } 

} 
} 

Answer 1

您需要在連接字符串中逃脫反斜槓，或使用@

connection.ConnectionString = @"Data Source=WINXPX86-BE;AttachDbFilename=D:\payegah\azmoongir_data.MDF;Integrated Security=True"; 

文檔：Escape Sequences

Answer 2

默認\被認爲是轉義字符。爲了避免添加@您的連接string.like之前，連接字符串之前

connection.ConnectionString = @"Data Source=WINXPX86-BE;AttachDbFilename=D:\payegah\azmoongir_data.MDF;Integrated Security=True"; 

Answer 3

添加@符號

@--->Escape characters 

---

connection.ConnectionString = @"Data Source=WINXPX86-BE;AttachDbFilename=D:\payegah\azmoongir_data.MDF;Integrated Security=True";