Question

C#建立数据库连接，提示错误，急！在线等！

namespace CRM.BaseClass
{
class BaseOperate
{
#region 建立数据库连接
/// <summary>
/// 建立数据库连接.
/// </summary>
/// <returns>返回SqlConnection对象</returns>
public SqlConnection getcon()
{
string M_str_sqlcon = "Data Source=50B2BDB872CD441\SQLEXPRESS;Database=db_CRM;User id=sa;PWD=";
SqlConnection myCon = new SqlConnection(M_str_sqlcon);
return myCon;
}
提示“无法识别的转义序列”
我的计算机名是50B2BDB872CD441，实例名是SQLEXPRESS，用的SQL2005数据库，数据库名师db_CRM,登录方式是混合验证模式，用户名为sa密码为0
不知道那里出问题了，正在做毕业设计，亟待各位高手帮助！
写成"string M_str_sqlcon = "Data Source=50B2BDB872CD441\\SQLEXPRESS;Database=db_CRM;User id=sa;PWD=0"或是string M_str_sqlcon = @"Data Source=50B2BDB872CD4\SQLEXPRESS;Database=db_CRM;User id=sa;password=0";

时出现52歌错误提示，说找不到类型或命名空间名称“DevExpress” 是不是得在最开始的using System中加入什么东西

Answer 1

Data Source=.\sqlexpress;Initial Catalog=db_CRM;Integrated Security=True

改用集成验证试试

Answer 2

connString = "Password="";Persist Security Info=True;User ID=sa;Initial Catalog=db_CRM;Data Source=50B2BDB872CD441";

Answer 3

Data Source=50B2BDB872CD441\SQLEXPRESS;Database=db_CRM;User id=sa;PWD=
里面那个\改成/试试看

Answer 4

在"链接字符串"前面加上@或者"Data Source=50B2BDB872CD441\\SQLEXPRESS;Database=db_CRM;User id=sa;PWD=0"这样