我是新手。我正在做一個ASP.NET教程,但我無法連接到VS的SQL Server 2016 Express。我得到的錯誤如下:爲什麼我無法通過VS連接到SQL Server 2016 Express?
An exception of type 'System.InvalidOperationException' occurred in System.Data.dll but was not handled in user code
Additional information: Instance failure.
這裏是我的代碼:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
namespace tree_view_control_tutorial_2
{
public partial class WebForm4 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
GetData(null);
}
}
private void GetData(string searchTerm)
{
string cs = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;
using (SqlConnection con = new SqlConnection(cs))
{
SqlCommand cmd = new SqlCommand("spSearchStudents", con);
cmd.CommandType = CommandType.StoredProcedure;
SqlParameter searchParameter = new SqlParameter("@SearchTerm", searchTerm);
cmd.Parameters.Add(searchParameter);
con.Open();
GridView1.DataSource = cmd.ExecuteReader();
GridView1.DataBind();
}
}
}
}
我該如何解決這個問題?謝謝!
您是否嘗試在con.Open之後刪除應用程序)行? –
是的。它沒有顯示任何錯誤。 –
你可以用SSMS連接代碼嗎? – Lloyd