// 改
private void btn_info_Click(object sender, EventArgs e)
{
int currIndex = dataGridView1.CurrentRow.Index; // 当前行
// 第0列是checkbox
int journalId = Convert.ToInt32(dataGridView1.Rows[currIndex].Cells[1].Value);
using (OdbcConnection conn = new OdbcConnection(connStr))
{
conn.Open();
string sqlStr = "SELECT J.journal_id, J.journal_name, J.new_publish_date, C.catalog_name, T.typee_name\n" +
"FROM Journal AS J, Editor AS E, Typee AS T, Catalogg AS C\n" +
"WHERE journal_id = " + journalId.ToString() + "\n" +
"AND J.editor_id = E.editor_id\n" +
"AND J.typee_id = T.typee_id\n" +
"AND T.catalog_id = C.catalog_id;";
OdbcDataReader reader = new OdbcCommand(sqlStr, conn).ExecuteReader(); // 执行查询语句
Hashtable infoTable = new Hashtable(); // 准备给对话框传参
if (reader.Read())
{
infoTable.Add("id", Convert.ToInt32(reader[0]));
infoTable.Add("name", Convert.ToString(reader[1]));
infoTable.Add("publish_date", Convert.ToDateTime(reader[2]));
infoTable.Add("catalog_name", Convert.ToString(reader[3]));
infoTable.Add("typee_name", Convert.ToString(reader[4]));
// 显示
DJournalInfo dJournal = new DJournalInfo(infoTable, connStr);
if (dJournal.ShowDialog() == DialogResult.OK)
{
infoTable = dJournal.getNewInfo();
// 更新数据，并刷新页面
// 1. 查询typee
sqlStr = "SELECT typee_id\n" +
"FROM Typee\n" +
"WHERE typee_name = \'" + infoTable["typee_name"] + "\';";
reader = new OdbcCommand(sqlStr, conn).ExecuteReader(); // 执行查询语句
reader.Read();
string typeeid = Convert.ToString(reader[0]);
// 2. 更新
sqlStr = "UPDATE Journal\n" +
"SET journal_name = \'" + infoTable["name"] + "\',\n" +
"new_publish_date = \'" + infoTable["publish_date"] + "\',\n" +
"typee_id = \'" + typeeid + "\'\n" +
"WHERE journal_id = " + journalId + ";";
noQuery(sqlStr);
updateGridView();
}
}
}
}
// 增
private void btn_add_Click(object sender, EventArgs e)
{
int currIndex = dataGridView1.CurrentRow.Index; // 当前行
int journalId = Convert.ToInt32(dataGridView1.Rows[currIndex].Cells[1].Value);
Hashtable infoTable = new Hashtable();
OdbcDataReader reader;
using (OdbcConnection conn = new OdbcConnection(connStr))
{
conn.Open();
string sqlStr;
// 先给一个journal_id以防重复
sqlStr = "SELECT MAX(journal_id)\n" +
"FROM Journal\n";
reader = new OdbcCommand(sqlStr, conn).ExecuteReader();
reader.Read();
infoTable["id"] = Convert.ToInt32(reader[0]) + 1;
DJournalInfo dJournal = new DJournalInfo(infoTable, connStr);
if (dJournal.ShowDialog() == DialogResult.OK)
{
infoTable = dJournal.getNewInfo();
// 更新数据，并刷新页面
// 1. 查询typee
sqlStr = "SELECT typee_id\n" +
"FROM Typee\n" +
"WHERE typee_name = \'" + infoTable["typee_name"] + "\';";
reader = new OdbcCommand(sqlStr, conn).ExecuteReader(); // 执行查询语句
reader.Read();
string typeeid = Convert.ToString(reader[0]);
// 2. 揷数据
sqlStr = "INSERT INTO Journal (journal_id, journal_name, new_publish_date, editor_id, typee_id)\n" +
string.Format("VALUES ('{0}', '{1}', '{2}', {3}, '{4}');",
infoTable["id"], infoTable["name"], infoTable["publish_date"], 3, typeeid);
noQuery(sqlStr);
updateGridView();
}
}
}
