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Description

This sample demonstrates how to mimic mail merge behavior to create a photo gallery using PowerPointWriter.

The Data

The data for this sample is a file containing multiple images. The images will be programmatically added to a data table along with a description.

The Template

Our template presentation consists of a title slide and a content slide. The content slide will be repeated for each of our images.

h3. The Code

The code below uses ExcelApplication to extract the data from the Excel spreadsheet into a DataTable. This code is also used in the ExcelWriter sample, Excel to DataTable Sample. It then passes the presentation to PowerPointTemplate and binds the data. The code uses [MaxRowsPerSlide|DatabindingProperties.MaxRowsPerSlide] to ensure the data fits neatly in the presentation. See Fitting Data on to Multiple Slides for more information.

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private void MailMerge(){
using(PowerPointTemplate ppt = new PowerPointTemplate()){
ppt.Open(@"C:\..\..\PhotoGalleryTemplate.pptx");
string[] colNames = { "Title", "Subtitle" };
object[] values = { "My photo gallery", "Images from April vacation 1998" };
ppt.BindData(values, colNames, "PhotoGallery", ppt.CreateDataBindingProperties());
DataTable imagedt = GetImageData();
 
DataBindingProperties dataProps = ppt.CreateDataBindingProperties();
dataProps.MaxRowsPerSlide = 1;
ppt.BindData(imagedt, "Image", dataProps);
ppt.Process();
ppt.Save(@"C:..\..\outputs\PhotoGalleryOutput.pptx");
}
}
private DataTable GetImageData()
{
string filePath = @"C:..\..\inputs\";
DataTable imagedt = new DataTable();
imagedt.Columns.Add("ImageData", typeof(byte[]));
imagedt.Columns.Add("Title");
imagedt.Columns.Add("Description");
imagedt.Rows.Add(new object[] { System.IO.File.ReadAllBytes(filePath + "Chrysanthemum.jpg"), "Chrysanthemum", "A beautiful red flower" });
imagedt.Rows.Add(new object[] { System.IO.File.ReadAllBytes(filePath + "Desert.jpg"), "Blistering Desert", "Red plateaus of the desert" });
imagedt.Rows.Add(new object[] { System.IO.File.ReadAllBytes(filePath + "Hydrangeas.jpg"), "Hydrangeas", "From a walk" });
imagedt.Rows.Add(new object[] { System.IO.File.ReadAllBytes(filePath + "Jellyfish.jpg"), "Jellyfish", "Spotted at the aquarium" });
imagedt.Rows.Add(new object[] { System.IO.File.ReadAllBytes(filePath + "Koala.jpg"), "Koala Bear", "From the zoo" });
imagedt.Rows.Add(new object[] { System.IO.File.ReadAllBytes(filePath + "Lighthouse.jpg"), "North Harbor Lighthouse", "An old lighthouse off the coast of my summer home" });
imagedt.Rows.Add(new object[] { System.IO.File.ReadAllBytes(filePath + "Penguins.jpg"), "Penguin Trio", "Emperor penguins that happened to stumble on the beach outside my hotel" });
imagedt.Rows.Add(new object[] { System.IO.File.ReadAllBytes(filePath + "Tulips.jpg"), "Golden Tulips", "Day 1 of my holiday in Holland" });
return imagedt;
}

Result

Below is one of the resulting slides from our output file.

Downloads


* Images: inputs.zip
* Template: PhotoGalleryTemplate.pptx
* Sample output: PhotoGalleryOutput.pptx

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