下面給出的代碼是花費無限長的時間來加載一個Web瀏覽器,當我點擊Button2,我的瀏覽器不斷加載....並且不顯示輸出。我可以在下面給出的代碼中做些什麼來提高處理速度。代碼優化asp.net c#
protected void Button2_Click(object sender, EventArgs e)
{
String a = DropDownList1.SelectedItem.Value;
String b = DropDownList3.SelectedItem.Value.PadLeft(3, '0');
String c = TextBox2.Text.PadLeft(5,'0').ToString();
String d = TextBox3.Text.ToString();
String digit = a+ b + c + d;
string sql = "select * from testcase.main where reg_no =?";
string sql1 = "select jname, jcode from heardt inner join judge ON heardt.jud1 = jcode";
try
{
using (OdbcConnection myConn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver};Server=localhost;Database=testcase;User=root;Password=root;Option=3;"))
{
using (OdbcCommand cmd = new OdbcCommand(sql, myConn))
{
myConn.Open();
cmd.Parameters.AddWithValue("?", digit);
using (OdbcDataReader MyReader = cmd.ExecuteReader())
{
//**
while (MyReader.Read())
{
String f = MyReader["pet_name"].ToString();
String g = MyReader["res_name"].ToString();
Label9.Visible = true;
Label9.Text = f;
Label10.Visible = true;
Label10.Text = "VS";
Label11.Visible = true;
Label11.Text = g;
}
}
}
}
}
catch (Exception e1)
{
Response.Write(e1.ToString());
}
//***********************
try
{
using (OdbcConnection myConn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver};Server=localhost;Database=testcase;User=root;Password=root;Option=3;"))
{
using (OdbcCommand cmd1 = new OdbcCommand(sql1, myConn))
{
myConn.Open();
using (OdbcDataReader MyReader1 = cmd1.ExecuteReader())
{
//**
while (MyReader1.Read())
{
String f = MyReader1["jname"].ToString();
DropDownList4.Items.Add(f);
}
}
}
}
}
catch (Exception ee1)
{
Response.Write(ee1.ToString());
}
}
是否有任何其他方式來執行查詢,而不使用連接操作爲以下查詢?
select jname, jcode from heardt inner join judge ON heardt.jud1 = jcode
首先要做的事情是:需要花費很長時間?在數據庫中,還是在.NET代碼中? – 2010-11-18 07:37:28
當我嘗試運行我的代碼 – Ishan 2010-11-18 07:42:37
你有索引reg_no,jud1和jcode列? – mikel 2010-11-18 07:44:27