InfoPath Dev

In a repeating table, I have an ink picture where the user draws. On a button click, I resize their drawing and display it in a picture control. When the user adds a 2nd ink picture, I can't seem to get it to display the resized image. I don't get an error but it doesn't seem to do anything either. I've traced with the debugger and it gets in here and executes everything.  Here's my code:

            string s = MainDataSource.CreateNavigator().SelectSingleNode("/dfs:myFields/my:Detail/my:Images/my:InkImage", NamespaceManager).Value;
            Image drawnImage = Base64ToImage(s);
            Image shrunkenImage=ResizeImage(drawnImage, new Size(100, 100));
            s = ImageToBase64(shrunkenImage, System.Drawing.Imaging.ImageFormat.Png);
            DeleteNil(MainDataSource.CreateNavigator().SelectSingleNode("/dfs:myFields/my:Detail/my:Images/my:ShrunkenImage", NamespaceManager));
            MainDataSource.CreateNavigator().SelectSingleNode("/dfs:myFields/my:Detail/my:Images/my:ShrunkenImage", NamespaceManager).SetValue(s);

Is the XPath of the 2nd image different?

Let's say my:Images is your repeating node - I figure that would be a good guess....

You'd want to create an XPathNodeIterator pointing to your repeating my:Images, and then loop through them, using relative paths from there "my:InkImage", "my:ShrunkenImage", etc. Here's an MSDN page with a code sample that should get you started....

        public void btnShrink_Clicked(object sender, ClickedEventArgs e)
        {
            XPathNavigator nav = CreateNavigator();
            XPathNodeIterator rows = nav.Select("/dfs:myFields/my:Detail/my:Images", NamespaceManager);
            while (rows.MoveNext())
            {
                string s = rows.Current.SelectSingleNode("/dfs:myFields/my:Detail/my:Images/my:InkImage", NamespaceManager).Value;
                Image drawnImage = Base64ToImage(s);
                Image resizedImage = ResizeImage(drawnImage, new Size(100, 100));
                s = ImageToBase64(resizedImage, System.Drawing.Imaging.ImageFormat.Png);
                DeleteNil(rows.Current.SelectSingleNode("/dfs:myFields/my:Detail/my:Images/my:ShrunkenImage", NamespaceManager));
                rows.Current.SelectSingleNode("/dfs:myFields/my:Detail/my:Images/my:ShrunkenImage", NamespaceManager).SetValue(s);
            }

        }

I've changed my code like this and it goes thru my while loop twice but it still doesn't display. The first row is ok, but the second one never displays the smaller image.  I get the xpath by clicking the control and going to the datasource and selecting Copy XPath. Do you see a problem? Thx for your help.

Here's the issue - rows is at my:Images, so you need relative XPath for the rest:

 while (rows.MoveNext())
{
string s = rows.Current.SelectSingleNode("my:InkImage", NamespaceManager).Value;
Image drawnImage = Base64ToImage(s);
Image resizedImage = ResizeImage(drawnImage, new Size(100, 100));
s = ImageToBase64(resizedImage, System.Drawing.Imaging.ImageFormat.Png);
DeleteNil(rows.Current.SelectSingleNode("my:ShrunkenImage", NamespaceManager));
rows.Current.SelectSingleNode("my:ShrunkenImage", NamespaceManager).SetValue(s);
}

Sure, I get it now. Thanks again.

You bet, glad you have it working!