RadGridView.Rows.Count - invalid value

[Andrei]

Hello Telerik Team,
I create a test method:

[Timeout(900000), TestMethod]
        public void CheckRadGridViewRowsCountTest()
        {
            //Manager.LaunchNewBrowser();
            Manager.LaunchNewBrowser(BrowserType.InternetExplorer, true);

            ActiveBrowser.AutoWaitUntilReady = true;
            ActiveBrowser.Window.SetActive();
            ActiveBrowser.Window.SetFocus();
            ActiveBrowser.Window.Maximize();

            ActiveBrowser.NavigateTo(@"http://demos.telerik.com/silverlight/#GridView/Sorting");

            // Get an instance of the running Silverlight Application.
            app = ActiveBrowser.SilverlightApps()[0];

            ActiveBrowser.RefreshDomTree();
            // Get an instance of the running Silverlight Application.
            app = ActiveBrowser.SilverlightApps()[0];
            app.VisualTree.Find.Strategy = FindStrategy.AlwaysWaitForElementsVisible;
            app.VisualTree.Find.WaitOnElementsTimeout = timeout;

            RadGridView radGridView1 = app.VisualTree.Find.ByAutomationId<RadGridView>("RadGridView1");
            var rowsCount = radGridView1.Rows.Count;
        }

When .I start this test, the value of "rowsCount" is 19, but really in radGridView1 we have > 50 rows, so why is this difference?

Thank you in advance!

[Stanislav]

Hello Andrei,

How many rows are displayed in the RadGridView? Because it looks like it returns the number of rendered and displayed rows. Try to execute .RefreshVisualTree() after you identify the control.

Kind Regards,
Stanislav Hordiyenko

[Andrei]

RadGridView radGridView1 = app.VisualTree.Find.ByAutomationId<RadGridView>("RadGridView1");
            app.RefreshVisualTrees();
            radGridView1.Refresh();
            var rowsCount = radGridView1.Rows.Count;

 - no changes.

"Because it looks like it returns the number of rendered and displayed rows" - ok, but how to identify total number of rows in this radGridView? 

[Boyan Boev]

Hello Andrei,

The reason you are getting only the visible rows is because of the virtualization. This is a limitation of the Visual Tree contained in the Silverlight engine. Silverlight puts into the Visual Tree only the UI components necessary to render the page on the screen.

The easiest way to get the total rows count is by dividing the total height of the grid, visible plus non-visible by the height of the row.

Here is the code:

FrameworkElement virtualizingPanel = app.Find.ByType("GridViewVirtualizingPanel");

int extentHeight; // The total height of the grid, visible plus non-visible

int rowHeight;

// Detect the extent height and the row height

extentHeight = (int)virtualizingPanel.GetProperty(new AutomationProperty("ExtentHeight", typeof(int)));



rowHeight = (int)radGridView1.GetProperty(new AutomationProperty("RowHeight", typeof(int)));

   

int totalPageRows = 0;   

totalPageRows = (extentHeight/rowHeight);

Please check out these articles:

- RadGridView Total Rows Count

- RadGridView Scrolling (coded solution)

- RadGridView Scrolling (non coded)

Let me know if you need additional help.
Regards,
Boyan Boev
the Telerik team

[Andrei]

This works, thank you...

But now another problem: in this example (http://demos.telerik.com/silverlight/#GridView/Sorting) how to copy ALL [Company Name] in a List<string>()

I try to do this: 

Manager.LaunchNewBrowser(BrowserType.InternetExplorer, true);

            ActiveBrowser.AutoWaitUntilReady = true;
            ActiveBrowser.Window.SetActive();
            ActiveBrowser.Window.SetFocus();
            ActiveBrowser.Window.Maximize();

            ActiveBrowser.NavigateTo(@"http://demos.telerik.com/silverlight/#GridView/Sorting");

            // Get an instance of the running Silverlight Application.
            app = ActiveBrowser.SilverlightApps()[0];

            ActiveBrowser.RefreshDomTree();
            // Get an instance of the running Silverlight Application.
            app = ActiveBrowser.SilverlightApps()[0];
            app.VisualTree.Find.Strategy = FindStrategy.AlwaysWaitForElementsVisible;
            app.VisualTree.Find.WaitOnElementsTimeout = timeout;

            ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
            RadGridView radGridView1 = app.VisualTree.Find.ByAutomationId<RadGridView>("RadGridView1");
            FrameworkElement virtualizingPanel = app.Find.ByType("GridViewVirtualizingPanel");
            int radGridViewRowsCount = (int)virtualizingPanel.GetProperty(new AutomationProperty("ExtentHeight", typeof(int))) / (int)radGridView1.GetProperty(new AutomationProperty("RowHeight", typeof(int)));

            List<string> cellsValues = new List<string>();

            //select first row
            radGridView1.Rows[0].User.Click();

            //add visible rows to list
            for (int index = 0; index < radGridView1.Rows.Count; index++)
            {
                //System.Diagnostics.Debug.WriteLine("before: " + radGridView.Rows[index].Cells[columnIndex].Value.ToString());
                cellsValues.Add(radGridView1.Rows[index].Cells[1].Value != null ? radGridView1.Rows[index].Cells[1].Value.ToString() : "");
                radGridView1.User.KeyPress(System.Windows.Forms.Keys.Down, 500);
            }

            int virtualizingRowIndex = 0;

            for (int index = radGridView1.Rows.Count; index < radGridViewRowsCount; index++)
            {
                cellsValues.Add(radGridView1.Rows[virtualizingRowIndex].Cells[1].Value != null ? radGridView1.Rows[virtualizingRowIndex].Cells[1].Value.ToString() : "");
                radGridView1.User.KeyPress(System.Windows.Forms.Keys.Down, 500);
                virtualizingRowIndex++;

                if (virtualizingRowIndex >= radGridView1.Rows.Count)
                {
                    virtualizingRowIndex = 0;
                }
            }

but the result not correspond with the reality, what I do wrong ?

[Boyan Boev]

Hi Andrei,

Unfortunately this is a virtualization problem. You can't walk through the entire grid by its index. It is constantly changing. 

To achieve this you need to implement your own logic for the indexing (e.g. some ID column) then base your logic for walking through the grid on this column for example.

Hope this helps.

Greetings,
Boyan Boev
the Telerik team

[Andrei]

Ok, thank you. I'll try later to find some workarounds.