No parameterless constructor defined for this object.

[Abhay]

 We are getting Error

No parameterless constructor defined for this object. at Telerik.ReportViewer.WebForms.SerializableReportInfo.GetReport()

at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean fillCache)
at System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at Telerik.ReportViewer.WebForms.SerializableReportInfo.GetReport()
at Telerik.ReportViewer.WebForms.SerializableReportDocument.GetDeserializedReport()
at Telerik.ReportViewer.WebForms.SerializableReportSourceWrapper.get_ReportSource()
at Telerik.ReportViewer.WebForms.ParametersPage.get_ReportDocument()
at Telerik.ReportViewer.WebForms.ParametersPage.get_ParamsManager()
at Telerik.ReportViewer.WebForms.ParametersPage.CreateChildControls()
at System.Web.UI.Control.EnsureChildControls()
at Telerik.ReportViewer.WebForms.ParametersPage.OnPreLoad(EventArgs e)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)


Binding datatable to telerik:ReportViewer

using Telerik.Reporting;

/// <summary>
/// Summary description for VersionHistory.
/// </summary>
public partial class RptVersionHistory : Report
{
public RptVersionHistory(DataTable dtable )
{
//
// Required for telerik Reporting designer support
//
InitializeComponent();
this.textBox8.Name = "Title";
this.textBox2.Name = "Version";
this.textBox3.Name = "Created By";
this.textBox7.Name = "Created Date";
this.textBox5.Name = "Modified By";
this.textBox4.Name = "Modified Date";
this.textBox1.Name = "Title";
this.DataSource = dtable;
//
// TODO: Add any constructor code after InitializeComponent call
//
}

In sharepoint application page in Page_Load calling as..

if (!this.IsPostBack)
{
InstanceReportSource reportSource = new InstanceReportSource
{ ReportDocument = new RptVersionHistory(this.DataTable) };
this.ReportViewer1.ReportSource = reportSource;
}

It’s working fine in Dev. Server but not on production it showing above error anyone knows how to find out error?

[Chavdar]

Hi,

When working in out-proc session, the objects need to be serialized and deserialized since they are not kept in memory. The XML serialization demands the objects to have a parameterless constructor and this is why you need one. You do not need to explicitly do anything for the serialization - this is just the way it works when in out-proc session.

For more info, please review the  Design Considerations for Out-proc Session State help article.


Kind regards,
Chavdar
the Telerik team