如何在 VB.Net 中使用 Page.getResults for Visio Automation

Question

将我的 VB 代码迁移到 VB.net 以实现 Visio Automation。我在 Page.GetResults 中收到错误 “指定的数组不是预期的类型”。 我猜错误与变体有关，但我无法解决。

感谢您的帮助

Answer 1

如果您浏览此 Codeplex 项目的源代码，您将使用 Visual Studio 2010 查找 Page.GetResults 的 VB 示例。它位于名为“VS2010_VB_Samples.vb”的文件中，

我在下面包含了源代码。该示例旨在教授如何使用 API。它不是

    ' CREATE REQUEST
    Dim request = {
           New With { _
            Key .ID = CShort(shape.ID16), _
            Key .Section = CShort(IVisio.VisSectionIndices.visSectionObject), _
            Key .Row = CShort(IVisio.VisRowIndices.visRowXFormOut), _
            Key .Cell = CShort(IVisio.VisCellIndices.visXFormWidth), _
            Key .UnitCode = CShort(IVisio.VisUnitCodes.visNoCast) _
           }, 
          New With { _
            Key .ID = CShort(shape.ID16), _
            Key .Section = CShort(IVisio.VisSectionIndices.visSectionObject), _
            Key .Row = CShort(IVisio.VisRowIndices.visRowXFormOut), _
            Key .Cell = CShort(IVisio.VisCellIndices.visXFormHeight), _
            Key .UnitCode = CShort(IVisio.VisUnitCodes.visNoCast) _
            }
         }

    ' MAP THE REQUEST TO THE STRUCTURES VISIO EXPECTS
    Dim SID_SRCStream = New Short(request.Length * 4 - 1) {}
    Dim unitcodes = New Object(request.Length - 1) {}
    For i As Integer = 0 To request.Length - 1
        SID_SRCStream((i * 4) + 0) = request(i).ID
        SID_SRCStream((i * 4) + 1) = request(i).Section
        SID_SRCStream((i * 4) + 2) = request(i).Row
        SID_SRCStream((i * 4) + 3) = request(i).Cell
        unitcodes(i) = request(i).UnitCode
    Next

    ' EXECUTE THE REQUEST
    Dim flags = CShort(IVisio.VisGetSetArgs.visGetFloats)
    Dim results_sa As System.Array = Nothing
    page.GetResults(SID_SRCStream, flags, unitcodes, results_sa)

    ' MAP OUTPUT BACK TO SOMETHING USEFUL 
    Dim results_doubles = New Double(results_sa.Length - 1) {}
    results_sa.CopyTo(results_doubles, 0)

    ' DISPLAY THE INFORMATION
    shape.Text = String.Format("Results={0},{1}", results_doubles(0), results_doubles(1))