System.InvalidOperationException: Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached. at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) at System.Data.SqlClient.SqlConnection.Open() at Tuan.DBUtility.DbHelperSQL.GetSingle(String connectionString, String SQLString) in E:\WebDocument\tuan\Tuangou_v4\Tuan\Tuan.DBUtility\DbHelperSQL.cs:line 201 at Tuan.DBUtility.DB.GetSingle(String strsql) in E:\WebDocument\tuan\Tuangou_v4\Tuan\Tuan.DBUtility\DB.cs:line 189 at Tuan.BLL.KeyValueBLL.GetValue(Int32 ClassID, Int32 CityID) in E:\Tuangou_v4\Tuan\Tuan.BLL\KeyValueBLL.cs:line 58 at Control_V20110101_header.Page_Load(Object sender, EventArgs e) in e:\web\tuan.web\Control\header.ascx.cs:line 30
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