c#/vb.net 删除 powerpoint 中图片水印和文本水印-ag凯发旗舰厅

之前介绍过， 本文将详细介绍如何使用spire.presentaion 来删除ppt文档中的图片水印和文本水印。

1.通过slidebackground.fill.filltype背景填充类型属性来删除图片水印

//加载有图片水印的powerpoint文档
presentation ppt = new presentation();
ppt.loadfromfile(@"watermark.pptx");
//遍历每一张幻灯片， 设置背景填充类型为none
for (int i = 0; i < ppt.slides.count; i  )
{ 
    ppt.slides[0].slidebackground.fill.filltype = fillformattype.none;
}
//保存结果文档到本地并打开
ppt.savetofile("removepicwatermak.pptx", fileformat.pptx2010);
system.diagnostics.process.start("removepicwatermak.pptx");

'加载有图片水印的powerpoint文档
dim ppt as new presentation()
ppt.loadfromfile("watermark.pptx")
'遍历每一张幻灯片， 设置背景填充类型为none
for i as integer = 0 to ppt.slides.count - 1
	ppt.slides(0).slidebackground.fill.filltype = fillformattype.none
next
'保存结果文档到本地并打开
ppt.savetofile("removepicwatermak.pptx", fileformat.pptx2010)
system.diagnostics.process.start("removepicwatermak.pptx")

效果展示：

文本水印存在于一个shape里，确定了水印所在的这个形状然后删除它即可。

//加载有水印的powerpoint文档
presentation ppt = new presentation();
ppt.loadfromfile(@"watermark.pptx");
//遍历每一张幻灯片， 查找水印文字内容所在的形状， 然后删除这个形状
for (int i = 0; i < ppt.slides.count; i  )
{
    for (int j = 0; j < ppt.slides[i].shapes.count; j  )
    {
        if (ppt.slides[i].shapes[j] is iautoshape)
        {
            iautoshape shape = ppt.slides[i].shapes[j] as iautoshape;
            if (shape.textframe.text.contains("内部资料"))
            {
                ppt.slides[i].shapes.remove(shape);
            }
        }
    }
}
//保存结果文档到本地并打开
ppt.savetofile("removetextwatermak.pptx", fileformat.pptx2010);
system.diagnostics.process.start("removetextwatermak.pptx");

'加载有水印的powerpoint文档
dim ppt as new presentation()
ppt.loadfromfile("watermark.pptx")
'遍历每一张幻灯片， 查找水印文字内容所在的形状， 然后删除这个形状
for i as integer = 0 to ppt.slides.count - 1
	for j as integer = 0 to ppt.slides(i).shapes.count - 1
		if typeof ppt.slides(i).shapes(j) is iautoshape then
			dim shape as iautoshape = trycast(ppt.slides(i).shapes(j), iautoshape)
			if shape.textframe.text.contains("内部资料") then
				ppt.slides(i).shapes.remove(shape)
			end if
		end if
	next
next
'保存结果文档到本地并打开
ppt.savetofile("removetextwatermak.pptx", fileformat.pptx2010)
system.diagnostics.process.start("removetextwatermak.pptx")

效果展示：