我是新手。我正在做一个ASP.NET教程,但我无法连接到VS的SQL Server 2016 Express。我得到的错误如下:为什么我无法通过VS连接到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.
这里是我的代码:
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();
}
}
}
}
我该如何解决这个问题?谢谢!
您是否尝试在con.Open之后删除应用程序)行? –
是的。它没有显示任何错误。 –
你可以用SSMS连接代码吗? – Lloyd