Searching programatically in GridView

[Attila]

Hello there,

I'm trying to implement a basic barcode scanner into my winforms application with radGridView. I'd like to search the GridView using this barcode scanner, so I have to fill the searchbox programatically. This is successful: I scan a code, it appears in the box. I have to use the Form's KeyPreview property set to TRUE and the Form's KeyPress event (because the scan ends as soon as the scanner send a NewLine character). Here's the code:

private string qrCode=string.Empty;

private void Form1_KeyPress(object sender, KeyPressEventArgs e)
{
    qrCode+=e.KeyChar;
    if (e.KeyChar == (char) Keys.Return)
    {
        StartSearch();
    }
}

private void StartSearch()
{
    GridViewSearchRowInfo searchRow = this.grdMyGridView.MasterView.TableSearchRow;
    searchRow.SearchProgressChanged += mySearchResult;
    searchRow.Search(qrCode);
    qrCode=string.Empty;
}

private void mySearchResult(object sender, SearchProgressChangedEventArgs e)
{
    Console.WriteLine("Results: " + e.Cells.Count);
}

 

My problem is, that I always get 0 results. The searchbox has the search string, this is no problem. If I type this string manually into this box, I get results perfectly. I want my GridView to show the results of scanned strings. Is this possible?

Thanks again for your help!

Attila

[Attila]

If I'm not subscribing to the SearchProgressChanged event and add 2 lines before the searchRow.Search method:

searchRow.HighlightResults = true;
searchRow.AutomaticallySelectFirstResult = true;

I get the result. But I don't think this could be the normal way to do it. 

In this case I have 1 more question: how can I clear the searchbox text programmatically?

[Dess | Tech Support Engineer, Principal]

Hello Attila,

Thank you for writing.  

I would like to note that we already have a feature request for a barcode generator. You can track its progress, subscribe for status changes and add your comments on the following link - https://feedback.telerik.com/Project/154/Feedback/Details/111885-add-new-control-barcode-generator-control

As to the search behavior, I would recommend you to have a look at the following help article which explains how the search functionality works and how to use the SearchProgressChanged event: http://docs.telerik.com/devtools/winforms/gridview/rows/search-row

I hope this information helps. Should you have further questions I would be glad to help.

Regards,
Dess
Telerik by Progress

[Attila]

Dear Dess,

Thanks for your fast reply. I read this search-row article before I sent you my first post. I still don't know how to clear the search box programmatically. Is there any way to do that?

Thanks

Attila

[Dess | Tech Support Engineer, Principal]

Hello Attila, 

Thank you for writing back. 

In order to clear the search criteria, you can call the Search method passing null as a parameter:

this.radGridView1.MasterView.TableSearchRow.Search(null);

I hope this information helps. If you have any additional questions, please let me know. 

Regards,
Dess
Telerik by Progress