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Does anyone know how to use ArcObjects (specifically ArcGIS Engine for me) to import a bookmark (saved as a .dat) that was created and saved externally using ArcMap?

I have an ArcGIS Engine application that uses the ControlsMapManageBookmarksCommandClass, but this does not have Load/Save options that the ArcMap bookmark control does.

I've searched all documentation and forums with no luck.

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  • Right. All kinds of ways to use/update existing bookmarks within a document but no actual example on how to utilize saved bookmarks. The AOIBookmark supports the IPersisStream interface. For more info on implementing persistence go here: edndoc.esri.com/arcobjects/9.2/CPP_VB6_VBA_VCPP_Doc/COM/…
    – Jakub Sisak GeoGraphics
    Commented May 18, 2011 at 17:58
  • You can also store the bookmarks in the *.MXD file, the bookmark commands works after you have loaded an MXD.
    – MathiasWestin
    Commented May 20, 2011 at 8:49

1 Answer 1

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It appears .dat files are structured storage files. Google turns up lots on: read structured storage c#.

private void LoadBookmarks()
{
    string path = @"C:\projects\forums\bookmarks.dat";
    if (StgIsStorageFile(path) == 0)
        Debug.Print("is structured storage");
    else
        Debug.Print("not a structured storage file");
}
[DllImport("ole32.dll")]
    static extern int StgIsStorageFile(
        [MarshalAs(UnmanagedType.LPWStr)]
        string pwcsName);

Also see this question Is there any library to access OLE Structured Storage from C#? on Stack Overflow.

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