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Examples of errors detected by the V305…

Examples of errors detected by the V3051 diagnostic

Apr 05 2021

V3051. An excessive type cast or check. The object is already of the same type.


Xamarin.Forms

V3051 An excessive type cast. The object is already of the 'FormsPivot' type. Xamarin.Forms.Platform.UAP TabbedPageRenderer.cs 73


public FormsPivot Control { get; private set; }

Brush ITitleProvider.BarBackgroundBrush
{
  set { (Control as FormsPivot).ToolbarBackground = value; }
}

Similar errors can be found in some other places:

  • V3051 An excessive type cast. The object is already of the 'FormsPivot' type. Xamarin.Forms.Platform.UAP TabbedPageRenderer.cs 78
  • V3051 An excessive type cast. The object is already of the 'FormsPivot' type. Xamarin.Forms.Platform.UAP TabbedPageRenderer.cs 282
  • V3051 An excessive type cast. The object is already of the 'FormsPivot' type. Xamarin.Forms.Platform.WinRT.Phone TabbedPageRenderer.cs 175
  • And 2 additional diagnostic messages.

Old NASA World Wind (C#)

V3051 An excessive type cast. The object is already of the 'IWidget' type. PanelWidget.cs 749


protected IWidgetCollection m_ChildWidgets =
                            new WidgetCollection();

public interface IWidgetCollection
{
  ....
  IWidget this[int index] {get;set;}
  ....
}

public void Render(DrawArgs drawArgs)
{
 ....
 for(int index = m_ChildWidgets.Count-1; index>=0; index--)
 {
   IWidget currentChildWidget =
            m_ChildWidgets[index] as IWidget; // <=
   ....
 }
 ....
}

Similar errors can be found in some other places:

  • V3051 An excessive type cast. The object is already of the 'IWidget' type. FormWidget.cs 1174
  • V3051 An excessive type cast. The object is already of the 'IWidget' type. RootWidget.cs 80
  • V3051 An excessive type cast. The object is already of the 'IWidget' type. RootWidget.cs 219
  • And 27 additional diagnostic messages.

Mono

V3051 An excessive type cast. The object is already of the 'MimeXmlBinding' type. SampleGenerator.cs 232


public string GenerateHttpGetMessage (Port port,
                                      OperationBinding obin,
                                      Operation oper,
                                      OperationMessage msg)
{
  ....
  MimeXmlBinding mxb =
    (MimeXmlBinding) obin.Output
                         .Extensions
                         .Find (typeof(MimeXmlBinding))
      as MimeXmlBinding;
  if (mxb == null) return req;
  ....
}

.NET Core Libraries (CoreFX)

V3051 An excessive type cast. The object is already of the 'Type' type. DbMetaDataFactory.cs 176


private DataTable ExecuteCommand(....)
{
  ....
  foreach (DataRow row in schemaTable.Rows)
  {
    resultTable.Columns
               .Add(row["ColumnName"] as string,
                   (Type)row["DataType"] as Type);
  }
  ....
}

Similar errors can be found in some other places:

  • V3051 An excessive type cast. The object is already of the 'Type' type. OdbcMetaDataFactory.cs 1109

Emby

V3051 An excessive type check. The object is already of the 'Exception' type. SmbFileInputStream.cs 107


protected internal virtual IOException SeToIoe(SmbException se)
{
  IOException ioe = se;
  Exception root = se.GetRootCause();
  if (root is TransportException)
  {
    ioe = (TransportException)root;
    root = ((TransportException)ioe).GetRootCause();
  }
  if (root is Exception)
  {
    ioe = new IOException(root.Message);
    ioe.InitCause(root);
  }
  return ioe;
}

RunUO

V3051 An excessive type cast. The object is already of the 'Item' type. Mobile.cs 11237


public Item Talisman
{
  get
  {
    return FindItemOnLayer( Layer.Talisman ) as Item;
  }
}
public Item FindItemOnLayer( Layer layer )
{
  ....
}

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