multicolumn combobox textChanged event

[Marius]

Hello!
I upgraded the version of Telerik controls from v.2011.2.11.831 to v.2012.2.608.20. For the event TextChanged i have the following code:

private void RBCMultiColumnComboBox_TextChanged(object sender, EventArgs e)
{
    if (!this.IsDesignMode)
        if (string.IsNullOrEmpty(this.Text) && this.AutoFilter)
        {
            this.SelectedItem = null;
            this.SelectedValue = null;
            this.EditorControl.FilterDescriptors.Clear();
            this.NullText = string.Empty;
            FilterDescriptor filterDescriptor = new FilterDescriptor(this.DisplayMember, FilterOperator.Contains, string.Empty);
            this.EditorControl.FilterDescriptors.Add(filterDescriptor);
        }
}

The problem is that i am getting an stackOverflowException. Can you guide me for a possisble solution, please. Thank you!

[Stefan]

Hi Marius,

Thank you for writing.

I am pretty confident that the reason for adding this code was a work around for some issue and I think that it is safe to remove it.

Please give it a try and let me know how it behaves.
 
Kind regards,
Stefan
the Telerik team

[Marius]

Hello!
Thank you for your answer. Now, my method looks like this:

private void RBCMultiColumnComboBox_TextChanged(object sender, EventArgs e)
{
        this.AutoFilter = true;
        FilterDescriptor filter = new FilterDescriptor();
        filter.PropertyName = this.DisplayMember;
        filter.Operator = FilterOperator.Contains;
        this.EditorControl.MasterTemplate.FilterDescriptors.Add(filter);
}

The problem is that when i insert text the width of the columns will increase. I created  a new project and it works with the same code. I have no idea where the difference is made. What should i check? Thank you!

[Marius]

It seems that the following code causes this behaviour.
When i removed this line of code, the width of the columns will no longer increase. But i don't want to remove this code, because it is helping me to set the width of the combobox' elements equal to control's width.

this.radMultiColumnComboBox1.MultiColumnComboBoxElement.EditorControl.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;

[Stefan]

Hello Marius,

In general, this code should not be in the TextChanged event. You can place it in the Form.Load event so it will just add a filter descriptor once and the you just need to type the desired text in the editable area. More information here: http://www.telerik.com/help/winforms/multicolumncombobox-filtering.html.

In regards to the columns fill mode, the AutoSizeColumnsMode property will set the columns width on a way to fill the entire inner grid, so if you want this functionality you can keep it on. It should not increase the size of the columns. More information here: http://www.telerik.com/help/winforms/gridview-columns-resizing-columns-programatically.html.

Please try to move the code in the Form.Load and let me know how it works for you. If you continue having difficulties, you can always open a new support ticket and attach your project there so we can investigate it and provide you with adequate for your case support.
 
Regards,
Stefan
the Telerik team

[Marius]

Hello!
Thank you for your answer.
I can not move the code in Form.Load event because i want to create a custom control who inherits the RadMultiColumnCombobox. I created a MyRadMultiColumnCombobox that derives from RadMultiColumnCombobox. Is there an event on this class where i can move this code?

[Stefan]

Hi Marius,

Thank you for writing.

You can use the same event of the control for the desired purpose. Attached you can find a sample implementation.

Let me know if I can be of further assistance.
 
Greetings,
Stefan
the Telerik team