cmd.executenonquery() error in c# code example

Example 1: cmd.executenonquery() error in c#

private void SaveBtn_Click(object sender, EventArgs e)
        {
            SqlConnection Con = new SqlConnection("Data Source=DESKTOP-BSJERV7\\YAKUBMUCK;Initial Catalog=LoginDatabase;Integrated Security=True");
            SqlCommand cmd = new SqlCommand(@"INSERT INTO [dbo].[Student]
           ([FirstName]
           ,[LastName]
           ,[MiddleName]
           ,[Gender]
           ,[DOB]
           ,[Address]
           ,[Form]
           ,[Contact]
           ,[Parent]
           ,[Fee])
     VALUES
           ('" + FirstNameTextBox.Text + "','" + LastNameTextBox.Text + "','" + MiddleNameTextBox.Text + "','" + GendercomboBox.SelectedItem.ToString() + "','" + DOBdateTimePicker.Value.Date + "','" + LComboBox.SelectedItem.ToString()+ "','" + ContactextBox.Text + "', '" + ParentTextBox.Text+ "','" + FeeTextBox.Text + "')");
            Con.Open();
            cmd.ExecuteNonQuery();
            Con.Close();
            MessageBox.Show("Save successifully");
        }

Example 2: 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();