Selecting value in multiColumnCombobox

[Jarek Rutowicz]

I hava a problem with selecting value in RadColumnComboBox.I can't even change property selectedValue.

this.radMultiColumnComboBoxMachineEventWorkerApproved.DataSource = this.bindingSourceWorkers;
this.radMultiColumnComboBoxMachineEventWorkerApproved.ValueMember = "idWorker";
this.radMultiColumnComboBoxMachineEventWorkerApproved.DisplayMember = "surname";

            foreach (var column in this.radMultiColumnComboBoxMachineEventWorkerApproved.MultiColumnComboBoxElement.Columns)
            {
                column.IsVisible = false;
            }

            this.radMultiColumnComboBoxMachineEventWorkerApproved.MultiColumnComboBoxElement.Columns["idWorker"].IsVisible = true;
            this.radMultiColumnComboBoxMachineEventWorkerApproved.MultiColumnComboBoxElement.Columns["name"].IsVisible = true;
            this.radMultiColumnComboBoxMachineEventWorkerApproved.MultiColumnComboBoxElement.Columns["surname"].IsVisible = true;
            this.radMultiColumnComboBoxMachineEventWorkerApproved.MultiColumnComboBoxElement.Columns["PESEL"].IsVisible = true;
            this.radMultiColumnComboBoxMachineEventWorkerApproved.MultiColumnComboBoxElement.Columns["name"].HeaderText = "Imię";
            this.radMultiColumnComboBoxMachineEventWorkerApproved.MultiColumnComboBoxElement.Columns["surname"].HeaderText = "Nazwisko";
            this.radMultiColumnComboBoxMachineEventWorkerApproved.MultiColumnComboBoxElement.Columns["PESEL"].HeaderText = "Pesel";

// ------------ now I try to change value

this.radMultiColumnComboBoxMachineEventWorkerApproved.MultiColumnComboBoxElement.SelectedValue = 5;
var selectedValue = this.radMultiColumnComboBoxMachineEventWorkerApproved.MultiColumnComboBoxElement.SelectedValue;

After running this code selectedValue is 1 not 5. A can't find a way to choose element in multicolumnbox programicaly so the user could see selected item before changing value to other.

Jarek.

[Jack]

Hi Jarek,

I confirm that there is an issue with SelectedValue property in RadMultiColumnComboBox. I added the issue in our bug tracking system and it will be addressed in our upcoming releases. I updated your Telerik points for this issue report.

You can use the following function to work around the issue:

RadMultiColumnComboBoxSelectValue(comboBox, 5);
//...
bool RadMultiColumnComboBoxSelectValue(RadMultiColumnComboBox comboBox, object valueToSelect)
{
    if (comboBox == null || valueToSelect == null)
    {
        returnfalse;
    }
    foreach (GridViewDataRowInfo row in comboBox.EditorControl.Rows)
    {
        object value = row.Cells[comboBox.ValueMember].Value;
        if (value != null && value.Equals(valueToSelect))
        {
            comboBox.EditorControl.CurrentRow = row;
            object displayValue = row.Cells[comboBox.DisplayMember].Value;
            if (displayValue != null)
            {
                comboBox.MultiColumnComboBoxElement.TextBoxElement.TextBoxItem.Text = displayValue.ToString();
            }
            returntrue;
        }
    }
    returnfalse;
}

I hope this helps. If you have more questions, just write us back.

Greetings,
Jack
the Telerik team

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[George]

Facing similar problem here while upgrading to Q3 from Q1 version. My project is now in chaos... as I use moumerous combo and list boxes all over my project, and trying to ammend code as you have suggested is a nightmare. With all due respect, this is a major "bug" and it needs to be addressed now, not at some time in your later releases. Furthermore, the Q3 version fixes a "bug" with form borders which displayed very thin, and made it very hard or almost impossible for the end user to grip a form border to resize a form. So, sticking to Q3 is imperative because my clients have raised hevoc over the form border issue. Having said that I would greatly appreciate a response on your part when the selectedvalue event will function properly and as intended.

Regards,

George

[Jack]

Hello George,

I understand your concerns. We will do our best to address this issue in our upcoming service pack.

I would suggest using a custom combobox class that inherits RadMultiColumnComboBox and overrides its SelectedValue property. Here is the code:

public class CustomMultiColumnComboBox : RadMultiColumnComboBox
{
    public new object SelectedValue
    {
        get { return base.SelectedValue; }
        set
        {
            RadMultiColumnComboBoxSelectValue(this, value);
        }
    }

    bool RadMultiColumnComboBoxSelectValue(RadMultiColumnComboBox comboBox, object valueToSelect)
    {
        if (comboBox == null || valueToSelect == null)
        {
            return false;
        }
        foreach (GridViewDataRowInfo row in comboBox.EditorControl.Rows)
        {
            object value = row.Cells[comboBox.ValueMember].Value;
            if (value != null && value.Equals(valueToSelect))
            {
                comboBox.EditorControl.CurrentRow = row;
                object displayValue = row.Cells[comboBox.DisplayMember].Value;
                if (displayValue != null)
                {
                    comboBox.MultiColumnComboBoxElement.TextBoxElement.TextBoxItem.Text = displayValue.ToString();
                }
                return true;
            }
        }
        return false;
    }
}

Should you have any questions, don't hesitate to ask.

Kind regards,
Jack
the Telerik team

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[Gustav Mulder]

Thanx the selectedvalue change works in Q3