Is there a way to access the current instance of a detail report in DevExpress XtraReports?

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1

I’m working with DevExpress XtraReports and I’ve run into a problem. I have a main report with a subreport that prints multiple times based on query results. I’m using the BeforePrint event on an XRTable in the subreport to do some calculations and change cell text.

The issue is that when I modify the text in one instance, it affects all the other instances of the table. I can work around this by resetting the text each time BeforePrint is called, but it feels like a hacky solution that could lead to bugs.

Is there a better way to handle this? I’m looking for a method to access and modify only the current instance of the table or widget being printed, rather than affecting all instances. Any suggestions would be appreciated!

2

I’ve faced this exact challenge in a recent project. One robust solution is to leverage the DataSource of your report. Instead of modifying the XRTable directly, update the underlying data that feeds into it. This approach ensures each instance remains distinct.

In your BeforePrint event, you can access the current data row and modify it:

private void xrTable_BeforePrint(object sender, PrintEventArgs e)
{
    XRTable table = sender as XRTable;
    if (table != null && table.DataSource != null)
    {
        var currentRow = (table.DataSource as IEnumerable<object>).ElementAtOrDefault(table.CurrentRowIndex);
        if (currentRow != null)
        {
            // Perform your calculations and update the currentRow
            // This change will only affect the current instance
        }
    }
}

This method maintains data integrity across all instances and provides a cleaner, more maintainable solution.

3

I’ve encountered a similar issue in my projects. One effective approach I’ve found is utilizing the ‘Tag’ property of XRTable or its cells. In the BeforePrint event, you can store instance-specific data in the Tag, ensuring each instance maintains its unique information.

For example:

private void xrTable_BeforePrint(object sender, System.Drawing.Printing.PrintEventArgs e)
{
    XRTable table = sender as XRTable;
    if (table != null && table.Tag == null)
    {
        // Perform your calculations here
        table.Tag = new Dictionary<string, object>
        {
            { "CalculatedValue", yourCalculatedValue }
        };
    }
}

This way, you’re only modifying the current instance, and the changes won’t propagate to other instances. It’s a cleaner solution than constantly resetting values and has worked reliably for me across various report scenarios.

4

hey Harry47, i’ve dealt with this before. try using the Report.CurrentRow property in ur BeforePrint event. it lets u access the current instance without affecting others. something like:

if (Report.CurrentRow != null) {
// modify only current instance
}

hope this helps! lmk if u need more info