[Solved] How to expand specific group in code?

[Tomislav Rakic]

Hi,

I have hierarchical RadGridView where MasterGridViewTemplate.AutoExpandGroups is set to False. Code for binding is like this.

PatientGridView.DataSource = currentPatientList;
GridGroupByExpression patientExpression = new GridGroupByExpression();
patientExpression.Expression = "FullName as FullName format \"{1}\" Group By OrderID";
PatientGridView.MasterGridViewTemplate.GroupByExpressions.Add(patientExpression);

After binding I want to programatically expand some groups by certain condition. I have tried with following code but it doesn't work:

            foreach (GridViewRowInfo row in PatientGridView.Rows) {
                if (someCondition == true) {
                    row.IsExpanded = true;
                    row.IsSelected = true;
                    PatientGridView.GridNavigator.SelectRow(row);
                }
            }

Can you advise how to programmatically expand specific group in RadGridView where all groups are collapsed by default?

Regards,

Tomislav

[Nikolay]

Hi Tomislav Rakic,

Thank you for the question.

Please note that a hierarchical RadGridView is different than a grouped RadGridView. Your code snippet will work in you have a hierarchical RadGridView where there are master data records and child data records. However, if you have a grouped RadGridView, you can loop through the groups' header rows as it is shown below:

foreach(DataGroup group in this.radGridView1.Groups)
{
    // sample condition
    if (this.radGridView1.Groups.IndexOf(group) % 2 == 0)
    {
        group.HeaderRow.IsExpanded = true;

        // or simply
        group.Expand();
    }
}

For additional information, please refer to this article.

I hope this helps. If you have additional questions, feel free to contact me.

Greetings,
Nikolay
the Telerik team

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