Passing a string from web part to user control

Question

public class ToolPartGetLists : Microsoft.SharePoint.WebPartPages.WebPart, ICommunicationInterface
{
    private bool _error = false;

    //.........

    protected override void CreateChildControls()
    {
     if (!_error)
     {
      try
      {
       ViewState["prodList"] = SelectedList;
       //base.CreateChildControls();
       Office_Cp = (OfficeCPS)Page.LoadControl(@"/_controltemplates/OfficeCP/OfficeCP.ascx");
       this.Controls.Add(Office_Cp);
       // Your code here...
       //this.Controls.Add(new LiteralControl(this.MyProperty));
      }
      catch (Exception ex)
      {
       HandleException(ex);
      }
     }
    }
}

public class OfficeCPS : System.Web.UI.UserControl
{
    //I want the value of Selected List here
    public string prodDataList = "";
    //.......
}

I tried ViewState, not working!!!

Answer 1

Inside the try you could use:

Office_Cp = (OfficeCPS)Page.LoadControl(@"/_controltemplates/OfficeCP/OfficeCP.ascx");
this.Controls.Add(Office_Cp);
Office_Cp.prodDataList = SelectedList;

If this doesn't work pay careful attention to how you are handling the ASP.NET lifecycle.

Also note it would be better practice to hide prodDataList behind a property or method.