MULTIPLE VALUES INSERTION INTO MULTIPLE TEXTBOXES

Question

I HAVE TO INSERT DATA INTO DATABASE TABLE FROM TEXTBOXES.DTABASE STRUCTURE
table name Insert_damo_1
name nvarchar(50)
lastname nvarchar(50)
addr  nvarchar(50)
C# CODING
        SqlConnection cnn1 = new SqlConnection("my connection string");
        cnn1.Open();
        SqlCommand cmd;
        String[] nam1 = {TextBox1.Text,TextBox2.Text,TextBox3.Text };
        foreach (String na in nam1)
            cmd = new SqlCommand("insert into Insert_damo_1(name) values(@name)",cnn1);
            cmd.Parameters.AddWithValue("@name",na);
            cmd.ExecuteNonQuery();
        String[] last1 = { TextBox4.Text, TextBox5.Text, TextBox6.Text };
        foreach (String la1 in last1)
            cmd = new SqlCommand("insert into Insert_damo_1(lastname) values(@lastname)", cnn1);
            cmd.Parameters.AddWithValue("@lastname", la1);
            cmd.ExecuteNonQuery();
        String[] ad1 = { TextBox7.Text, TextBox8.Text, TextBox9.Text };
        foreach (String a1 in ad1)
            cmd = new SqlCommand("insert into Insert_damo_1(addr) values(@addr)", cnn1);
            cmd.Parameters.AddWithValue("@addr", a1);
            cmd.ExecuteNonQuery();
        cnn1.Close();
        Response.Write("insert successful");
I GOT THE RESULT AS
name          lastname
 address
a                  null                     null
b                  null                     null
c                  null                     null
null             d                         null
null             e                         null
null             f                          null
null            null                      g
null            null                      h
null            null                      i
1. I WANT RESULT WITHOUT NULL
2. IF USER DOES'T INSERT ANYTHING IN A TEXT BOX THEN ONLY NULL IS INSERTED AT THAT PLACE
ANY HELP WILL BE DEEPLY APPRECIATED.
THANK YOU. 

Answer 1

Try this
cnn1.Open();
SqlCommand cmd;
String[] nam1 = {TextBox1.Text,TextBox2.Text,TextBox3.Text };
String[] last1 = { TextBox4.Text, TextBox5.Text, TextBox6.Text };
String[] ad1 = { TextBox7.Text, TextBox8.Text, TextBox9.Text };
cmd = new SqlCommand("insert into Insert_damo_1(name,lastname,addr) values(@name,@lastname,@addr)",cnn1);
cmd.Parameters.Add("@name", SqlDbType.VarChar);
cmd.Parameters.Add("@lastname", SqlDbType.VarChar);
cmd.Parameters("@addr", SqlDbType.VarChar);
for(int i; i < nam1.Length; i++)
cmd.Parameters["@name"].Value = nam1[i];
cmd.Parameters["@lastname"].Value = last1[i];
cmd.Parameters["@addr"].Value = last1[i];
cmd.ExecuteNonQuery();
cnn1.Close();
Response.Write("insert successful");
jdweng