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h dave

h dave

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Not able to connect SQL databse

Mar 20 2020 4:49 PM
Hello,
Can anyone please help and give me suggestion or solution for one of the project 
From the code mentioned below I am not able to connect databse thought I have tried to save the connection strin into app.config but nothing happnes  
 
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Windows.Forms;
using System.IO;
//using System.ServiceProcess;
//using Microsoft.SqlServer.Management.Common;
//using Microsoft.SqlServer.Management.Smo;
using System.Diagnostics;
using System.Threading;
using ENTITY;
using System.Configuration;
//<summary>
//Summary description for DBConnection
//</summary>
namespace OpenMiracle.DAL
{
public class DBConnection
{
public SqlConnection sqlcon;
string strServer = ".\\MSSQLSERVER";
public string path = string.Empty;
public DBConnection()
{
/* */
//-------------Single User----------------------//
strServer = ".\\MSSQLSERVER";
if (File.Exists(Application.StartupPath + "\\sys.txt"))
{
strServer = File.ReadAllText(Application.StartupPath + "\\sys.txt"); // getting ip of server
}
if (PublicVariables._decCurrentCompanyId > 0)
{
path = Application.StartupPath + "\\Data\\" + PublicVariables._decCurrentCompanyId + "\\DBOpenMiracle.mdf";
}
else if (PublicVariables._decCurrentCompanyId == 0)
{
path = Application.StartupPath + "\\Data\\DBOpenMiracle.mdf";
}
else
{
path = Application.StartupPath + "\\Data\\COMP\\DBOpenMiracle.mdf";
}
sqlcon = new SqlConnection(@"Data Source=" + strServer + ";AttachDbFilename=" + path + ";Integrated Security=True;Connect Timeout=120;User Instance=True");
//;Max Pool Size=200
/*
sqlcon = new SqlConnection(@"Data Source=192.168.2.112\SQLS2008;database=DBOpenMiracle;user id='open';password='miracle';Connect Timeout=30;");
//----------------Server----------------------//
*/
/// <summary>
/// SQL Express may take time to start up due to AutoClose Behaviour of SQLEXPRESS
/// Here we checking the sql connection and catches the logon error.
/// </summary>
try
{
if (sqlcon.State == ConnectionState.Closed)
{
sqlcon.Open();
}
}
catch (SqlException sEx)
{
int i = sEx.Number;
if (i == 233)
{
Reconnect();
}
else if (i == -1)
{
MessageBox.Show("OpenMiracle","SQL connection failure... Please check the instance name of your sqlexpress with " + Application.StartupPath + " \\sys.txt");
}
else if (i == 18493)
{
ChangeConnectionForServer();
}
else
{
MessageBox.Show("Could not connect to your database... Please check your SQL Configuration", "OpenMiracle");
}
}
catch (Exception)
{
//Catche any other exception
}
finally
{
}
try
{
PrintWorks.frmDBConnection.connectionString = sqlcon.ConnectionString;
}
catch
{
//sql Error
}
}
/// <summary>
/// SQL Express may take time to start up due to AutoClose Behaviour of SQLEXPRESS
///
/// </summary>
private void Reconnect()
{
try
{
Thread.Sleep(30000);
if (sqlcon.State == ConnectionState.Closed)
{
sqlcon.Open();
}
}
catch (Exception)
{
MessageBox.Show("Your SQL Server is starting up... Please close and re-open the application", "OpenMiracle");
}
}
/// <summary>
/// Cheanges the connection string to support SQLServer version instead of SQLExpress
/// </summary>
private void ChangeConnectionForServer()
{
sqlcon = new SqlConnection(@"Data Source=" + strServer + ";AttachDbFilename=" + path + ";Integrated Security=True;Connect Timeout=120;User Instance=True");
}
}
}

Answers (1)