API/CodeSamples/ShowInvalidVizExportLink.md
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+#ShowJoinDropDown
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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 value indicating whether the join type dropdown should be shown on the DataSources tab (Advanced Mode). Advanced mode can be accessed by clicking "Advanced" on the DataSources tab when [[ShowDataSourcesAsCheckBoxes|/API/CodeSamples/ShowDataSourcesAsCheckBoxes]] is true, or by setting [[ShowDataSourcesAsCheckBoxes|/API/CodeSamples/ShowDataSourcesAsCheckBoxes]] to 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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+ //Creates a connection to Microsoft SQL Server
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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.ShowJoinDropDown = 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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+ '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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+ 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.ShowJoinDropDown = 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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+
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+##Screenshots
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+
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+![](http://izenda.com/Site/Images/Screenshots/ShowJoinDropDownDS.png)
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