SQL 服务器无法建立到数据库的连接字符串

Question

我在 SQL Server Management Studio 中尝试了以下操作；我可以连接和运行查询，但不能从我的项目

string s = "Server=LAPTOP-7J47C5JA\SQLEXPRESS;Database=Test;Trusted_Connection=True;";

string queryString =   "SELECT * from tbclienti";

cn = new SQLConnection(s);

// Create the Command and Parameter objects.
SqlCommand command = new SqlCommand(queryString, cn);

cn.Open();

SqlDataReader reader = command.ExecuteReader();

while (reader.Read())
{
    Text = reader[0].ToString();
    label1.Text = reader[1].ToString()+ " " + reader[2].ToString();
}

reader.Close();
cn.Close();

Answer 1

我在这里发布了整个代码，看起来像什么。立即尝试。

    string s = @"Server=(local)\SQLEXPRESS;Database=Test;Integrated Security=SSPI;";

    using(SqlConnection cn = new SqlConnection(s))
    {
        string queryString = "SELECT * from tbclienti";

        try
        {    
          cn.Open();
          // Create the Command and Parameter objects.
          SqlCommand command = new SqlCommand(queryString, cn);
          SqlDataReader reader = command.ExecuteReader();
          while (reader.Read())
          {
             Text = reader[0].ToString();
             label1.Text = reader[1].ToString()+ " " + reader[2].ToString();

           }
           reader.Close();
         }
         catch(Exception ex) 
         {
             // see if error appear
         }
         finally
         {
           cn.Close();
         }
    }

SQL 服务器无法建立到数据库的连接字符串

SQL Server cannot build connection string to db

c#

sql-server

connection

database-connection