为什么总报insert into 语句错误
string str,sql1,sql2;sql1 = "insert into UserInfo (UserName,PassWord,Role";
sql2 = "values ('" + textBox1.Text.ToString() + "','" + textBox2.Text.ToString() + "','" + comboBox1.Text.ToString () ;
str=sql1+")"+sql2+")";
cmd.CommandText = str;
cmd.ExecuteNonQuery();