RadTextBoxElement Max Length Property

[Duang]

 Hi,
    I have to added a custom elements (RadTextBoxElement) to grid cells on the CellFormatting event at runtime.

RadTextBoxElement textbox = new RadTextBoxElement();
textbox.Alignment = ContentAlignment.MiddleCenter;
textbox.KeyPress += new KeyPressEventHandler(textbox_KeyPress);
textbox.TextChanged += new EventHandler(textbox_TextChanged);
e.CellElement.Children.Add(textbox);

    I would like to limit the value of textbox not over 99 but i can't set the max length property of the RadTextBoxElement.
Can you help me for solve this problem ?

[Martin Vasilev]

Hello Duang,

Thank you for writing.

Adding RadTextBoxElement to RadGridView is not a good practice, because the RadGridView behavior may become unpredictable. Is there are a particular reason for going this route?

I would suggest using a standard GridViewTextBoxColumn. You could limit the text length by accessing TextBox in RadTextBoxEditor and set its MaxLenght property. Please, review the code-block below as example:
 

private void radGridView1_CellEditorInitialized(object sender, Telerik.WinControls.UI.GridViewCellEventArgs e)
{
    if (this.radGridView1.ActiveEditor is RadTextBoxEditor)
    {
        //limit the lenght only for column with index 4
        if (e.ColumnIndex == 4)
        {
            ((this.radGridView1.ActiveEditor as RadHostItem).HostedControl as TextBox).MaxLength = 5;
        }
        else
        {
            ((this.radGridView1.ActiveEditor as RadHostItem).HostedControl as TextBox).MaxLength = 32767;
        }
    }
}

I hope this helps.

Best wishes,
Martin Vasilev
the Telerik team

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