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Simulating windows explorer sorting

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Jorge Delgado-Lopez
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Jorge Delgado-Lopez asked on 18 Dec 2008, 02:18 AM
Hi

I am trying to simulate the ordering of "details view" on windows explorer (Vista). That is, all the folders are grouped together.

I have the name, date, type, size columns and a "isfile" which is not shown, although one could use the fact that size is string.empty. Anyhow, I have been trying with SortExpressions but to no avail. Take a look at my tests.

        private void radGridView_SortChanged(object sender, GridViewCollectionChangedEventArgs e)
        {
            if (e.GridViewTemplate.SortExpressions.Count > 0) // clear does trigger sortchanged
            {
                if (e.GridViewTemplate.SortExpressions.IndexOf("IsFile") == -1) // already added?
                {
                    e.GridViewTemplate.SortExpressions.Insert(0, new GridSortField("IsFile", e.GridViewTemplate.SortExpressions[0].SortOrder)); // force it to be the most important expression
                }
            }
        }

Any ideas?

Thanks
-jorge
VS2005, 2008Q3 1204

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Julian Benkov
Telerik team
answered on 19 Dec 2008, 03:47 PM
Hello Jorge Delgado-Lopez,

You can use and extend the data model used in our Explorer QSF example for this scenario.

If you have additional questions, please contact us again.

Best wishes,
Julian Benkov
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.
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Jorge Delgado-Lopez
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answered on 19 Dec 2008, 08:43 PM
Hi,

The sample "vista explorer" doesn't fit my needs.

My problem right now is sorting, and the sample does not supply any sortexpression examples.

Thanks,
-j
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Julian Benkov
Telerik team
answered on 22 Dec 2008, 05:08 PM
Hi Jorge,

The solution with string.Empty for the Folder presentation in the 'IsFile' column will work fine for sorting. This approach requires your data to always set string.Emty for Folder type and some string for File type, like FileName as example.

To support grouping you should add a GroupByExpresion to the RadGridView, but this will not allow for sorting. Group By operation takes care of the sorting automatically.

this.radGridView1.MasterGridViewTemplate.GroupByExpressions.Add("IsFile Group By IsFile"); 
 
 


Kind regards,
Julian Benkov
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.
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Julian Benkov
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Jorge Delgado-Lopez
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