[英]C# SqlConnection (IIS issue?) “The ConnectionString property has not been initialized”
我有一個奇怪的問題。
我有一個C#/ ASP.Net應用程序,該應用程序連接到SQL數據庫以檢索信息。
當我在本地運行它時,它可以完美運行。 我能夠檢索數據,沒有問題。
我試圖將其部署到網絡上的IIS服務器上,然后開始出現錯誤: The ConnectionString property has not been initialized
這通常意味着變量尚未初始化/沒有值,這很奇怪,因為它在本地運行。 我進行了重新構建,重新部署,確保已擁有所有文件,等等。
我決定嘗試其他方法-我添加了一段代碼(File.WriteAllText)。
private DataTable getStoredProcResults(string procName, string[][] parameters)
{
InitSql(true);
DataTable dt = new DataTable();
File.WriteAllText(@"C:\Temp\CONNECTION.LOG", connectionDetails.ConnectionString); //Added this
using (SqlConnection sqlConn = new SqlConnection(connectionDetails.ConnectionString))
{
sqlConn.Open();
SqlCommand sqlComm = new SqlCommand(procName, sqlConn);
foreach (string[] param in parameters)
{
sqlComm.Parameters.AddWithValue(param[0], param[1]);
}
sqlComm.CommandType = CommandType.StoredProcedure;
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = sqlComm;
da.Fill(dt);
sqlConn.Dispose();
}
return dt;
}
這是奇怪的地方。 我可以將connectionDetails.ConnectionString寫入文本文件,並且它具有正確的值。 在本地運行時,我已經將IIS Web服務器上的值與文本文件進行了比較,並且連接字符串完全相同。
如果以下行錯誤表明未初始化ConnectionString,如何將連接字符串寫出到文本文件中?
當我訪問該頁面時,這是IIS服務器上的完整錯誤:
The ConnectionString property has not been initialized.
Exception Details: System.InvalidOperationException: The ConnectionString property has not been initialized.
堆棧跟蹤:
[InvalidOperationException: The ConnectionString property has not been initialized.]
System.Data.SqlClient.SqlConnection.PermissionDemand() +6610944
System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +6605639
System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +233
System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +278
System.Data.SqlClient.SqlConnection.Open() +239
System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +292
System.Data.Common.DbDataAdapter.Fill(DataTable[] dataTables, Int32 startRecord, Int32 maxRecords, IDbCommand command, CommandBehavior behavior) +487
System.Data.Common.DbDataAdapter.Fill(DataTable dataTable) +293
GenericPortalWebForms.Logic.HourGlassJob.getResultSet(String sqlCommand, Boolean fromHourGlassDB) in c:\Users\cthompso\Source\Workspaces\CustomSolutions\Sema\GenericPortal\Hourglass\Web\Logic\HourGlassJob.cs:297
GenericPortalWebForms.Logic.HourGlassJob.setJobDetails(Int64 wrID) in c:\Users\cthompso\Source\Workspaces\CustomSolutions\Sema\GenericPortal\Hourglass\Web\Logic\HourGlassJob.cs:75
GenericPortalWebForms.Logic.HourGlassJob..ctor(DataRow hgJobRow) in c:\Users\cthompso\Source\Workspaces\CustomSolutions\Sema\GenericPortal\Hourglass\Web\Logic\HourGlassJob.cs:40
GenericPortalWebForms.HourGlass.GetAllHGjobs() in c:\Users\cthompso\Source\Workspaces\CustomSolutions\Sema\GenericPortal\Hourglass\Web\Hourglass.aspx.cs:49
GenericPortalWebForms.HourGlass.Page_Load(Object sender, EventArgs e) in c:\Users\cthompso\Source\Workspaces\CustomSolutions\Sema\GenericPortal\Hourglass\Web\Hourglass.aspx.cs:26
System.Web.UI.Control.LoadRecursive() +71
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3178
================================================== ==========
編輯:對不起,我的代碼在這里:
當我第一次創建對象時,首先要對其進行初始化。
private ConnectionStringSettings connectionDetails = ConfigManager.HourglassDb;
從配置管理器中:
public static ConnectionStringSettings HourglassDb
{
get { return ConfigurationManager.ConnectionStrings[ConnectionStringName.Split(',')[2]]; }
}
並從web.config中:
<add key="ConnectionStringName" value="name=BLAH1,BLAH2,BLAH3,BLAH4" />
<connectionStrings>
<add name="BLAH3" connectionString="Data Source=SERVER;Initial Catalog=DATABASE;User ID=USER;Password=PASSWORD;" providerName="System.Data.SqlClient" />
</connectionStrings>
在調用connection
的Open()
方法之前,您是否嘗試過創建命令對象。 所以像這樣:
SqlCommand sqlComm = new SqlCommand(procName, sqlConn);
sqlConn.Open();
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