/C#/How to solve error in ExecuteNonQuery() in asp.net

How to solve error in ExecuteNonQuery() in asp.net

SqlConnection con = new SqlConnection();
con.ConnectionString = @"Data Source = (LocalDB)\MSSQLLocalDB; AttachDbFilename = C:\Users\Harry\Documents\Visual Studio 2015\WebSites\WebSite2\App_Data\Database.mdf; Integrated Security = True";
con.Open();

// insert command 
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandText="INSERT INTO firsttb VALUES ( @n , @p ) ";
cmd.CommandType = System.Data.CommandType.Text;
cmd.Parameters.AddWithValue("@n",TextBox1.Text);
cmd.Parameters.AddWithValue("@p", TextBox2.Text);

cmd.ExecuteNonQuery();

con.Close();

Source: stackoverflow.com

Similar codes

0 vote187 views2 answers
Mongodb c# batch find
C#
33 votes256 views5 answers
Unity get child
C#
0 vote315 views1 answer
Check if an object is grounded or not in unity
C#Unity
5 votes175 views3 answers
C# merge two lists with return
C#
0 vote193 views1 answer
Monodevelop ubuntu 20.04
C#
33 votes302 views5 answers
Unity get child
C#Unity
0 vote241 views1 answer
Unity vector3 to array
C#Unity
1 vote185 views1 answer
C# string contains any of list
C#
0 vote189 views1 answer
C# split on multiple characters
C#
12 votes215 views2 answers
Doing void when gameobject setactive unity
C#