在我的应用程序上,我需要连接客户端数据库(SqlServer),看看我们是否可以连接。 这些是来自web.config的连接字符串(值不是那样,我改了ip,用户和pwd)
<add name="ConnectionStringLibracom" connectionString="Data Source=192.168.1.45\SqlServer2008;Initial Catalog=xxx;user=xxx;pwd=xxx;Application Name=MES"
providerName="System.Data.SqlClient" /> (MINE)
<add name="ConnectionStringMigplus" connectionString="Data Source=999.99.999.99;Initial Catalog=xxx;user=xxx;pwd=xxx"
providerName="System.Data.SqlClient" /> (CLIENT)
但是这段代码挂起了我的整个应用程序(当我说它挂起时,我的意思是它不允许我的应用程序连接到我们的数据库)。我在Load事件的Default.aspx上执行它:
protected void Page_Load(object sender, EventArgs e)
{
if (!TestaIntegracaoErpMigplus())
{
lblMensagemIntegracao.Visible = true;
Session["Integracao"] = false;
}
else
Session["Integracao"] = true;
}
protected static bool TestaIntegracaoErpMigplus()
{
string connectionStringMigplus = WebConfigurationManager.ConnectionStrings["ConnectionStringMigplus"].ConnectionString;
bool ret = false;
using (SqlConnection Conn = new SqlConnection(connectionStringMigplus))
{
try
{
Conn.Open();
if (Conn.State == ConnectionState.Open)
{
ret = true;
}
}
catch (SqlException)
{
ret = false;
}
}
return ret;
}
@EDIT:问题不在于我是否可以连接到服务器,问题是:当我尝试连接到该数据库时,我的asp.net网站冻结到其他页面的新请求
答案 0 :(得分:5)
您无需检查ConnectionState
如果无法打开连接an exception is throw
可能此检查导致您的问题
protected static bool TestaIntegracaoErpMigplus()
{
bool ret = true;
try
{
string connectionStringMigplus = WebConfigurationManager.ConnectionStrings["ConnectionStringMigplus"].ConnectionString;
using (SqlConnection Conn = new SqlConnection(connectionStringMigplus))
{
Conn.Open();
}
}
catch (Exception)
{
ret = false;
}
return ret;
}
------------- UPDATE ------------------
尝试降低连接字符串中的connection timeout:
<add name="ConnectionStringMigplus" connectionString="Data Source=999.99.999.99;Initial Catalog=xxx;user=xxx;pwd=xxx;Connection Timeout=5" providerName="System.Data.SqlClient" />
答案 1 :(得分:4)
您可以尝试将连接移至Task并使用Wait函数暂停,类似这样
protected static bool TestaIntegracaoErpMigplus()
{
string connectionStringMigplus = WebConfigurationManager.ConnectionStrings["ConnectionStringMigplus"].ConnectionString;
var task = Task.Factory.StartNew<bool>(()=>{
bool ret = true;
using (SqlConnection Conn = new SqlConnection(connectionStringMigplus))
{
try
{
Conn.Open();
}
catch (SqlException)
{
ret = false;
}
}
return ret;
});
if(task.Wait(/*your timeout in milliseconds*/)){
return task.Result;
}
return false;
}