OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=f://sjk.mdb");
conn.Open();
string cc = this.comboBox1.Text;
OleDbDataAdapter da = new OleDbDataAdapter("select * from 列车时刻表 where 所属车次=cc", conn);
DataSet sj = new DataSet();
da.Fill(sj);
DataGridView xs = new DataGridView();
xs.DataSource = sj.Tables[0];红色字体处被声明有未被赋值的数据 不知道怎么回事 在线等
conn.Open();
string cc = this.comboBox1.Text;
OleDbDataAdapter da = new OleDbDataAdapter("select * from 列车时刻表 where 所属车次=cc", conn);
DataSet sj = new DataSet();
da.Fill(sj);
DataGridView xs = new DataGridView();
xs.DataSource = sj.Tables[0];红色字体处被声明有未被赋值的数据 不知道怎么回事 在线等
conn.Open();
string cc = this.comboBox1.Text;
OleDbDataAdapter da = new OleDbDataAdapter("select * from 列车时刻表 where 所属车次='"+cc.Trim()+"'", conn);
DataSet sj = new DataSet();
da.Fill(sj);
DataGridView xs = new DataGridView();
xs.DataSource = sj.Tables[0];