/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 vote308 views1 answer
C# calculate someone's age
C#
2 votes275 views2 answers
How to split concat string c#
C#
20 votes269 views4 answers
Generate random string C#
C#
1 vote263 views1 answer
Read in multiple numbers c#
C#
0 vote284 views1 answer
Rotate gameobject unity
C#
1 vote326 views2 answers
Restart level unity
C#Unity
0 vote324 views1 answer
How to start a webpage from a button c#
C#
0 vote281 views1 answer
Get vector direction unity
C#
0 vote271 views1 answer
Itext7 c# memorystream
C#
1 vote275 views1 answer
Optimistic update
C#