private void Button1_Click(object sender, EventArgs e)
{
Oreki.ShowInput("条码扫描", "请扫描用户条码");
if (Oreki.OkCancel == 0)
{
return;
}
ChkCon();
var commandText = $"select user_name from teamz_users where user_barcode='{Oreki.Temp}'";
var command = new MySqlCommand(commandText, Connection);
var name = new object();
var reader = command.ExecuteReader();
name = new object();
while (reader.Read())
{
name = reader[0];
}
reader.Close();
if (Oreki.Temp == "0")
{
MessageBox.Show("用户不存在");
return;
}
try
{
var xxx = (string)name;
}
catch (Exception)
{
MessageBox.Show("用户不存在");
return;
}
try
{
label1.Text = $"当前用户：{(string)name}";
}
catch (Exception)
{
return;
}
tabControl1.Enabled = true;
TabRefresh();
}
private void Button3_Click(object sender, EventArgs e)
{
ChkCon();
string commandText = $"select book_owner from teamz_books where book_barcode='{Oreki.Bookbarcode}'";
MySqlCommand command = new MySqlCommand(commandText, connection);
object owner = new object();
MySqlDataReader reader = command.ExecuteReader();
while (reader.Read())
{
owner = reader[0];
}
reader.Close();
if ((string)owner != "0")
{
MessageBox.Show("图书未归还");
return;
}
Oreki.ShowInput("删除图书", "扫描条码以确认删除");
if (Oreki.OkCancel == 0)
{
return;
}
if (Oreki.Temp == Oreki.Bookbarcode)
{
string commandText2 = $"delete from teamz_books where book_barcode='{Oreki.Bookbarcode}'";
MySqlCommand command2 = new MySqlCommand(commandText2, connection);
command2.ExecuteNonQuery();
MessageBox.Show("图书删除成功");
BookSearch();
}
else
{
MessageBox.Show("输入的内容与图书条码不匹配");
}
}