如何将textbox.text(日期)存入datetime型的数据字段中去
SqlConnection myconn = new SqlConnection("Data Source=localhost;Initial Catalog=OADB; UID=sa;PWD=6");
SqlCommand mycmd = new SqlCommand("insert into ww_news(date,bigtype,smalltpe,tip,nr)values('dateTextBox.Text','" + DropDownList1.SelectedValue + "','" + DropDownList2.SelectedValue + "','" + TextBox1.Text + "','" + TextBox13.Text + "')", myconn);
myconn.Open();
mycmd.ExecuteNonQuery();
myconn.Close();
出错提示:datetime转换错误