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我使用C＃創建簡單的應用程序將在1分鐘後反覆檢查數據庫。我正在使用線程使其更加方式並減少資源。這些線程只會同時執行一個函數。DBConnection的超時使用SQL
我的問題是
例外是未處理：DBConnection的
超時過期。之前的操作的完成的超時 時間已過或服務器是 沒有響應。
我明白，我與數據庫的連接超過時間限制。那麼，如何解決這個問題呢？
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using GDEX.Master;
using GDEX.DataAccess;
using System.Globalization;
using System.IO;
using System.Threading;
namespace SMPPTransfer
{
public partial class frmDBTS : Form
{
string updateProbRecord = string.Empty;
string selectProbRecord = string.Empty;
string selectProbStat = string.Empty;
string updateStat = string.Empty;
string selectAssignTo = string.Empty;
string CheckPODStatus = string.Empty;
DataTable dtStat = null;
DataTable dtPOD = null;
DataTable dtAssignNo = null;
bool stopThreads = false;
AutoResetEvent blockThread1 = new AutoResetEvent(true);
AutoResetEvent blockThread2 = new AutoResetEvent(false);
delegate void SetTextCallback(string text);
GDexSqlSvConnection dbCon;
public frmDBTS()
{
InitializeComponent();
String connSQLSvr = "Data Source=<my IP>;Initial Catalog=<database>;User ID=<username>;Password=<pwd>;";
dbCon = new GDexSqlSvConnection(connSQLSvr);
Thread thread1 = new Thread(new ThreadStart(UpdateProbRec));
Thread thread2 = new Thread(new ThreadStart(UpdateProbStat));
thread1.Start();
thread2.Start();
}
private void UpdateProbRec()
{
while (stopThreads == false)
{
blockThread1.WaitOne();
SetText1("Entered Thread 1");
SetText2("Out Thread 2");
//Get POD status
CheckPODStatus = "select top 100 * from (select cn"
+ " FROM gdexpdb.dbo.prob_record where solve = 'N' and status!='S') A "
+ " join (select cn, cn_date"
+ " from gdexpdb.dbo.pod_data where type='rts' or type = 'pod' or type = 'm_pod' or type = 'm_rts') B "
+ "on A.CN=B.cn";
dtPOD = dbCon.ExecuteQueryAndGetDataTable(CheckPODStatus); //Problem occur from here and only for this function only
DateTime cnDate;
string cnDateCon;
for (int iii = 0; iii < dtPOD.Rows.Count; iii++)
{
cnDate = (DateTime)dtPOD.Rows[iii][2];
cnDateCon = cnDate.ToString("yyyy-MM-dd");
updateProbRecord = "update gdexpdb.dbo.prob_record set solve='Y', solve_date='" + cnDateCon + "', status='S' "
+ "where cn='" + dtPOD.Rows[iii][0] + "'";
dbCon.ExecuteNonQuery(updateProbRecord);
}
dtPOD.Clear();
Thread.Sleep(30000);
blockThread2.Set();
}
}
private void UpdateProbStat()
{
while (stopThreads == false)
{
blockThread1.WaitOne();
SetText2("Entered Thread 2");
SetText1("Out Thread 1");
selectProbStat = "select username from gdexpdb.dbo.prob_stat";
dtStat = dbCon.ExecuteQueryAndGetDataTable(selectProbStat);
int[] userNo = new int[dtStat.Rows.Count];
for (int x = 0; x < dtStat.Rows.Count; x++)
{
selectAssignTo = "select count(*) as assignNo from gdexpdb.dbo.prob_record where assign_to='" + dtStat.Rows[x][0]+ "'";
dtAssignNo = dbCon.ExecuteQueryAndGetDataTable(selectAssignTo);
updateStat = "update gdexpdb.dbo.prob_stat set stat=" + dtAssignNo.Rows[0][0] + "where username='" + dtStat.Rows[x][0] + "'";
dbCon.ExecuteNonQuery(updateStat);
}
dtStat.Clear();
dtAssignNo.Clear();
Thread.Sleep(100000);
blockThread1.Set();
}
}
private void SetText1(string text)
{
// InvokeRequired required compares the thread ID of the
// calling thread to the thread ID of the creating thread.
// If these threads are different, it returns true.
if (this.TextThread1.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(SetText1);
this.Invoke(d, new object[] { text });
}
else
{
this.TextThread1.Text = text;
}
}
private void SetText2(string text)
{
// InvokeRequired required compares the thread ID of the
// calling thread to the thread ID of the creating thread.
// If these threads are different, it returns true.
if (this.TextThread2.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(SetText2);
this.Invoke(d, new object[] { text });
}
else
{
this.TextThread2.Text = text;
}
}
}
}
你有什麼已經嘗試過呢？ – linkerro
哪一行引發異常？ –
爲什麼不使用計時器？ –