API/CodeSamples/AllowVirtualDataSources.md
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+#AllowVirtualDataSources
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+
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+[[_TOC_]]
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+
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+##About
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+
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+Gets or sets the availability of the [[Virtual Data Sources|/Virtualdatasource]] feature. This will do two things: it will enable the "Expose as Datasource" checkbox on the Misc tab of the Report Designer, and it will create a hyperlink on the name of any data source on the Data Sources tab which will show all visible reports that use the current data source.
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+
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+**Default Value:** False
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+
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+##Global.asax (C♯)
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+
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+```csharp
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+//main class: inherits DatabaseAdHocConfig or FileSystemAdHocConfig
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+public class CustomAdHocConfig : Izenda.AdHoc.DatabaseAdHocConfig
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+{
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+ // Configure settings
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+ // Add custom settings after setting the license key and connection string by overriding the ConfigureSettings() method
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+ public static void InitializeReporting() {
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+ //Check to see if we've already initialized.
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+ if (HttpContext.Current.Session == null || HttpContext.Current.Session["ReportingInitialized"] != null)
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+ return;
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+ AdHocSettings.LicenseKey = "INSERT_LICENSE_KEY_HERE";
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+ AdHocSettings.SqlServerConnectionString = "INSERT_CONNECTION_STRING_HERE";
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+ Izenda.AdHoc.AdHocSettings.AdHocConfig = new CustomAdHocConfig();
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+ AdHocSettings.AllowVirtualDataSources = True; //The relevant setting
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+ HttpContext.Current.Session["ReportingInitialized"] = true;
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+ }
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+}
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+```
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+
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+##Global.asax (VB.NET)
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+
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+```visualbasic
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+'main class: inherits DatabaseAdHocConfig or FileSystemAdHocConfig
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+Public Class CustomAdHocConfig
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+ Inherits Izenda.AdHoc.DatabaseAdHocConfig
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+
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+ Shared Sub InitializeReporting()
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+ 'Check to see if we've already initialized
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+ If HttpContext.Current.Session Is Nothing OrElse HttpContext.Current.Session("ReportingInitialized") IsNot Nothing Then
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+ Return
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+ 'Initialize System
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+ AdHocSettings.LicenseKey = "INSERT_LICENSE_KEY_HERE"
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+ AdHocSettings.SqlServerConnectionString = "INSERT_CONNECTION_STRING_HERE"
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+ Izenda.AdHoc.AdHocSettings.AdHocConfig = New CustomAdHocConfig()
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+ AdHocSettings.AllowVirtualDataSources = True 'The relevant setting
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+ HttpContext.Current.Session("ReportingInitialized") = True
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+ End Sub
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+End Class
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+```
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