PowerPoint Interop:按Master中定义的名称获取占位符

时间:2013-11-15 13:39:51

标签: c# powerpoint office-interop powerpoint-automation

在我的PowerPoint AddIn中,我想访问幻灯片上的形状。形状是在slidemaster中的自定义布局中定义的占位符。

当我根据自定义布局添加幻灯片时,形状只会命名为“占位符1”,“占位符2”,...

有没有办法按照主人的名字来获取占位符?

目前我正在使用以下代码搜索形状:

public static Shape GetShape(string stringToSearch, Shapes shapes) {

        foreach (Shape shape in shapes) {

            if (shape.Name == stringToSearch) {
                return shape;
            }

            // Search Groups
            if (shape.Type == MsoShapeType.msoGroup) {
                foreach (Shape childshape in shape.GroupItems) {
                    if (childshape.Name == stringToSearch) {
                        return childshape;
                    }
                }
            }
        }

        throw new KeyNotFoundException("No Shape found");
}

更新: 也许为了更清楚,这是PowerPoint演示文稿的结构。

为占位符定义的名称为Master: Scrennshot of the master

在master中定义的名称丢失的演示文稿: Screenshot of the presentation

问题:如何按照在master中定义的名称获取演示文稿中的元素?

1 个答案:

答案 0 :(得分:0)

嗯......这是史蒂夫的“丑陋!”解。

对于我的项目,我既没有也不想控制形状的创建,所以我不能“标记”它们。这就是为什么我有一个自定义占位符名称来标识它们,所以形状的名称确实是[PlaceholderType] ##。

步骤:

  • 存储所有形状的位置
  • 重置幻灯片布局
  • 匹配幻灯片形状和主幻灯片形状
  • 恢复所有形状的位置。

注意:我不使用形状组。如果你这样做,你需要检查内部组,这种技术将会变得更加复杂。

这是执行此操作并返回mastershapename - shapename映射的函数。

private Dictionary<string, string> GetShapeMasters(Powerpoint.Slide s)
{
    Dictionary<string, string> shapeMasters = new Dictionary<string, string>();
    List<ShapeLocation> shapeLocations = new List<ShapeLocation>();

    //store locations
    foreach (Powerpoint.Shape sh in s.Shapes)
    {
        shapeLocations.Add(new ShapeLocation()
        {
            Name = sh.Name,
            Location = new System.Drawing.RectangleF(sh.Left, sh.Top, sh.Width, sh.Height)
        });
    }

    //have powerpoint reset the slide
    //ISSUE: this changes the names of placeholders without content.
    s.CustomLayout = s.CustomLayout;

    //compare slide and master
    foreach (Powerpoint.Shape sh in s.Shapes)
    {
        foreach (Powerpoint.Shape msh in s.CustomLayout.Shapes)
        {
            if (IsShapeMaster(sh, msh))
            {
                shapeMasters[msh.Name] = sh.Name;
            }
        }
    }

    //restore locations
    //TODO: might be replaced by undo
    foreach (var shm in shapeLocations)
    {
        Powerpoint.Shape sh = null;
        try
        {
            sh = s.Shapes[shm.Name];
        }
        catch 
        {
            //Fails for renamed placeholder shapes.
            //Have yet to find a decent way to check if a shape name exists.
        }

        //placeholders do not need to be restored anyway.
        if (sh != null)
        {
            sh.Left = shm.Location.Left;
            sh.Top = shm.Location.Top;
            sh.Width = shm.Location.Width;
            sh.Height = shm.Location.Height;
        }
    }

    return shapeMasters;
}

这样你可以做到

Dictionary<string, string> shapeMasters = GetShapeMasters(theSlide);
if(shapeMasters.ContainsKey(stringToSearch))
    Powerpoint.Shape KnownShape = theSlide[shapeMasters[stringToSearch]];

这是比较函数,它采用两种形状并检查它们是否“相等”。可以扩展以使其更精确。

private bool IsShapeMaster(Powerpoint.Shape sh, Powerpoint.Shape msh)
{
    return
        sh.Left == msh.Left
        && sh.Top == msh.Top
        && sh.Width == msh.Width
        && sh.Height == msh.Height
        && sh.Type == msh.Type
        && sh.PlaceholderFormat.Type == msh.PlaceholderFormat.Type;
}

存储原始形状位置的小类

class ShapeLocation
{
    public string Name;
    public System.Drawing.RectangleF Location;
}

我愿意接受建议,因为我也不喜欢这样。似乎没有其他方法可以将形状和占位符链接在一起。确实没有一些shape.MasterShape我们缺少,是吗?