Erro no visual Studio

Boa tarde pessoal,

sou novo nesse negócio de Web e estou com um problema que não consigo resolver. Alguém poderia me ajudar.

Obrigado.




Server Error in /sgWEB Application.

Não foi possível localizar o Provedor de Dados .Net Framework solicitado. Talvez ele não esteja instalado.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: Não foi possível localizar o Provedor de Dados .Net Framework solicitado. Talvez ele não esteja instalado.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[ArgumentException: Não foi possível localizar o Provedor de Dados .Net Framework solicitado. Talvez ele não esteja instalado.]
System.Data.Common.DbProviderFactories.GetFactory(String providerInvariantName) +1420519
System.Web.UI.WebControls.SqlDataSource.GetDbProviderFactory() +67
System.Web.UI.WebControls.SqlDataSource.GetDbProviderFactorySecure() +22
System.Web.UI.WebControls.SqlDataSource.CreateConnection(String connectionString) +11
System.Web.UI.WebControls.SqlDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +117
System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +21
DevExpress.Web.ASPxClasses.Internal.DataHelper.PerformSelect() +210
DevExpress.Web.ASPxGridView.GridViewDataHelper.PerformSelect() +181
DevExpress.Web.ASPxClasses.Internal.DataContainer.PerformSelect() +126
DevExpress.Web.ASPxClasses.ASPxDataWebControlBase.DataBindCore() +44
DevExpress.Web.ASPxClasses.ASPxDataWebControlBase.DataBind() +172
DevExpress.Web.ASPxGridView.ASPxGridView.DataBind() +224
DevExpress.Web.ASPxClasses.Internal.DataHelperBase.EnsureDataBound(Boolean ensureChildControls) +114
DevExpress.Web.ASPxClasses.Internal.DataHelperBase.EnsureDataBound() +34
DevExpress.Web.ASPxClasses.Internal.DataContainer.EnsureDataBound() +126
DevExpress.Web.ASPxClasses.ASPxDataWebControlBase.OnPreRender(EventArgs e) +47
System.Web.UI.Control.PreRenderRecursiveInternal() +103
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Control.PreRenderRecursiveInternal() +175
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2496

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.237