C＃中的連接字符串錯誤數據庫

Question

我從網上下載了一個項目及其數據庫。 我運行該項目，並將其數據庫添加到VS 2008 Sp1上的選項卡服務器上，並具有SQl服務器2008。

但是，當我將新的連接字符串復制到程序時，出現以下錯誤消息：

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轉義反斜杠 ，或使用@

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

文檔： 轉義序列

Answer 2

默認情況下，\\被視為轉義字符。 為了避免這種情況，請在連接字符串之前添加@。

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

Answer 3

在連接字符串之前添加@符號

@--->Escape characters

---

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